/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.5.3.ufo.BOUNDED-10.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:05:35,621 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:05:35,623 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:05:35,663 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:05:35,664 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:05:35,666 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:05:35,669 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:05:35,671 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:05:35,672 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:05:35,677 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:05:35,678 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:05:35,679 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:05:35,680 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:05:35,682 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:05:35,683 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:05:35,684 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:05:35,685 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:05:35,685 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:05:35,687 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:05:35,693 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:05:35,694 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:05:35,695 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:05:35,697 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:05:35,698 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:05:35,705 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 02:05:35,705 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 02:05:35,706 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 02:05:35,707 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 02:05:35,707 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 02:05:35,708 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 02:05:35,708 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 02:05:35,709 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 02:05:35,710 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 02:05:35,710 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 02:05:35,711 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 02:05:35,711 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 02:05:35,712 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 02:05:35,712 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 02:05:35,712 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:05:35,713 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:05:35,714 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:05:35,715 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 02:05:35,745 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:05:35,746 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:05:35,746 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:05:35,746 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:05:35,747 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:05:35,747 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:05:35,747 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:05:35,747 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:05:35,748 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:05:35,748 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:05:35,748 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:05:35,749 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:05:35,749 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:05:35,749 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:05:35,749 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:05:35,749 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:05:35,749 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:05:35,749 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:05:35,750 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:05:35,750 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:05:35,750 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:05:35,750 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:05:35,750 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:05:35,751 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:05:35,751 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:05:35,751 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:05:35,751 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:05:35,751 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:05:35,751 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:05:35,751 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:05:35,751 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:05:35,752 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:05:35,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:05:35,752 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:05:35,752 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:05:35,752 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:05:35,752 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:05:35,752 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:05:35,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:05:35,753 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:05:35,753 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:05:35,753 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:05:35,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:05:36,012 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:05:36,015 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:05:36,016 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:05:36,017 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:05:36,018 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c [2023-04-03 02:05:37,148 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:05:37,425 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:05:37,426 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c [2023-04-03 02:05:37,455 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e08a3fcfa/c6d4ac7d917a41b0b22cc0f7a361e45a/FLAG3bdf571c6 [2023-04-03 02:05:37,471 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e08a3fcfa/c6d4ac7d917a41b0b22cc0f7a361e45a [2023-04-03 02:05:37,473 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:05:37,474 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:05:37,477 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:05:37,478 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:05:37,481 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:05:37,481 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:05:37" (1/1) ... [2023-04-03 02:05:37,483 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c19c78b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:05:37, skipping insertion in model container [2023-04-03 02:05:37,483 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:05:37" (1/1) ... [2023-04-03 02:05:37,490 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:05:37,552 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:05:37,962 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.5.3.ufo.BOUNDED-10.pals.c[65471,65484] [2023-04-03 02:05:37,966 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:05:37,983 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:05:38,084 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.5.3.ufo.BOUNDED-10.pals.c[65471,65484] [2023-04-03 02:05:38,085 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:05:38,112 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:05:38,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:05:38 WrapperNode [2023-04-03 02:05:38,112 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:05:38,113 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:05:38,113 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:05:38,113 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:05:38,121 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:05:38" (1/1) ... [2023-04-03 02:05:38,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:05:38" (1/1) ... [2023-04-03 02:05:38,141 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:05:38" (1/1) ... [2023-04-03 02:05:38,141 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:05:38" (1/1) ... [2023-04-03 02:05:38,192 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:05:38" (1/1) ... [2023-04-03 02:05:38,212 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:05:38" (1/1) ... [2023-04-03 02:05:38,221 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:05:38" (1/1) ... [2023-04-03 02:05:38,229 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:05:38" (1/1) ... [2023-04-03 02:05:38,249 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:05:38,250 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:05:38,250 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:05:38,250 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:05:38,251 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:05:38" (1/1) ... [2023-04-03 02:05:38,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:05:38,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:05:38,281 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 02:05:38,333 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 02:05:38,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:05:38,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:05:38,350 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:05:38,351 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:05:38,351 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-03 02:05:38,351 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-03 02:05:38,351 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-03 02:05:38,351 INFO L138 BoogieDeclarations]: Found implementation of procedure node4 [2023-04-03 02:05:38,351 INFO L138 BoogieDeclarations]: Found implementation of procedure node5 [2023-04-03 02:05:38,352 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-03 02:05:38,352 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-03 02:05:38,352 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:05:38,352 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-03 02:05:38,352 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:05:38,352 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:05:38,352 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:05:38,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:05:38,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:05:38,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:05:38,352 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:05:38,352 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:05:38,353 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:05:38,353 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:05:38,353 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:05:38,353 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:05:38,353 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:05:38,353 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-03 02:05:38,353 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-03 02:05:38,354 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:05:38,354 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:05:38,354 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:05:38,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:05:38,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:05:38,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:05:38,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:05:38,354 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:05:38,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:05:38,591 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:05:38,593 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:05:39,975 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:05:41,382 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:05:41,383 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-03 02:05:41,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:05:41 BoogieIcfgContainer [2023-04-03 02:05:41,387 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:05:41,390 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:05:41,390 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:05:41,392 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:05:41,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:05:37" (1/3) ... [2023-04-03 02:05:41,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71bd73de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:05:41, skipping insertion in model container [2023-04-03 02:05:41,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:05:38" (2/3) ... [2023-04-03 02:05:41,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71bd73de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:05:41, skipping insertion in model container [2023-04-03 02:05:41,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:05:41" (3/3) ... [2023-04-03 02:05:41,397 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c [2023-04-03 02:05:41,415 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:05:41,416 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 02:05:41,486 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:05:41,493 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;@5834184f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:05:41,493 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 02:05:41,502 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) [2023-04-03 02:05:41,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-04-03 02:05:41,531 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:05:41,532 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] [2023-04-03 02:05:41,533 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:05:41,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:05:41,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1201355822, now seen corresponding path program 1 times [2023-04-03 02:05:41,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:05:41,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190746432] [2023-04-03 02:05:41,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:05:41,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:05:42,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:05:54,181 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 02:05:54,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:05:54,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190746432] [2023-04-03 02:05:54,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190746432] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:05:54,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:05:54,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2023-04-03 02:05:54,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080940841] [2023-04-03 02:05:54,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:05:54,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-03 02:05:54,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:05:54,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-03 02:05:54,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2023-04-03 02:05:54,229 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) [2023-04-03 02:05:59,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:05:59,424 INFO L93 Difference]: Finished difference Result 594 states and 941 transitions. [2023-04-03 02:05:59,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-04-03 02:05:59,426 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 [2023-04-03 02:05:59,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:05:59,440 INFO L225 Difference]: With dead ends: 594 [2023-04-03 02:05:59,440 INFO L226 Difference]: Without dead ends: 536 [2023-04-03 02:05:59,444 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 [2023-04-03 02:05:59,447 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 6477 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 7271 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s 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, 4.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:05:59,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6480 Valid, 206 Invalid, 7470 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [199 Valid, 7271 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-04-03 02:05:59,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2023-04-03 02:05:59,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 510. [2023-04-03 02:05:59,544 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) [2023-04-03 02:05:59,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 834 transitions. [2023-04-03 02:05:59,547 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 834 transitions. Word has length 160 [2023-04-03 02:05:59,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:05:59,548 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 834 transitions. [2023-04-03 02:05:59,548 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) [2023-04-03 02:05:59,548 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 834 transitions. [2023-04-03 02:05:59,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-04-03 02:05:59,551 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:05:59,551 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] [2023-04-03 02:05:59,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:05:59,552 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:05:59,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:05:59,552 INFO L85 PathProgramCache]: Analyzing trace with hash -57214818, now seen corresponding path program 1 times [2023-04-03 02:05:59,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:05:59,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695787644] [2023-04-03 02:05:59,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:05:59,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:05:59,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:06:05,117 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 02:06:05,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:06:05,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695787644] [2023-04-03 02:06:05,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695787644] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:06:05,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:06:05,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:06:05,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599819087] [2023-04-03 02:06:05,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:06:05,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:06:05,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:06:05,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:06:05,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:06:05,124 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) [2023-04-03 02:06:08,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:06:08,176 INFO L93 Difference]: Finished difference Result 593 states and 939 transitions. [2023-04-03 02:06:08,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:06:08,176 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 [2023-04-03 02:06:08,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:06:08,182 INFO L225 Difference]: With dead ends: 593 [2023-04-03 02:06:08,182 INFO L226 Difference]: Without dead ends: 543 [2023-04-03 02:06:08,183 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 [2023-04-03 02:06:08,184 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, 2.8s IncrementalHoareTripleChecker+Time [2023-04-03 02:06:08,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [852 Valid, 118 Invalid, 6335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 6313 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-03 02:06:08,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2023-04-03 02:06:08,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 510. [2023-04-03 02:06:08,238 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) [2023-04-03 02:06:08,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 832 transitions. [2023-04-03 02:06:08,240 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 832 transitions. Word has length 161 [2023-04-03 02:06:08,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:06:08,241 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 832 transitions. [2023-04-03 02:06:08,241 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) [2023-04-03 02:06:08,242 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 832 transitions. [2023-04-03 02:06:08,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-04-03 02:06:08,243 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:06:08,243 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] [2023-04-03 02:06:08,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:06:08,244 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:06:08,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:06:08,244 INFO L85 PathProgramCache]: Analyzing trace with hash -2136837957, now seen corresponding path program 1 times [2023-04-03 02:06:08,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:06:08,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652900904] [2023-04-03 02:06:08,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:06:08,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:06:08,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:06:12,571 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 02:06:12,571 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:06:12,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652900904] [2023-04-03 02:06:12,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652900904] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:06:12,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:06:12,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:06:12,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576625599] [2023-04-03 02:06:12,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:06:12,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:06:12,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:06:12,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:06:12,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:06:12,574 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) [2023-04-03 02:06:15,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:06:15,079 INFO L93 Difference]: Finished difference Result 587 states and 923 transitions. [2023-04-03 02:06:15,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:06:15,080 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 [2023-04-03 02:06:15,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:06:15,086 INFO L225 Difference]: With dead ends: 587 [2023-04-03 02:06:15,086 INFO L226 Difference]: Without dead ends: 542 [2023-04-03 02:06:15,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:06:15,088 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 [2023-04-03 02:06:15,088 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] [2023-04-03 02:06:15,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2023-04-03 02:06:15,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 510. [2023-04-03 02:06:15,131 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) [2023-04-03 02:06:15,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 831 transitions. [2023-04-03 02:06:15,134 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 831 transitions. Word has length 162 [2023-04-03 02:06:15,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:06:15,134 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 831 transitions. [2023-04-03 02:06:15,135 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) [2023-04-03 02:06:15,135 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 831 transitions. [2023-04-03 02:06:15,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-04-03 02:06:15,137 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:06:15,137 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] [2023-04-03 02:06:15,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:06:15,138 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:06:15,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:06:15,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1073934425, now seen corresponding path program 1 times [2023-04-03 02:06:15,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:06:15,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879187787] [2023-04-03 02:06:15,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:06:15,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:06:15,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:06:19,318 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 02:06:19,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:06:19,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879187787] [2023-04-03 02:06:19,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879187787] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:06:19,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:06:19,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:06:19,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391268981] [2023-04-03 02:06:19,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:06:19,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:06:19,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:06:19,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:06:19,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:06:19,321 INFO L87 Difference]: Start difference. First operand 510 states and 831 transitions. Second operand has 11 states, 7 states have (on average 20.428571428571427) internal successors, (143), 9 states have internal predecessors, (143), 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) [2023-04-03 02:06:21,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:06:21,932 INFO L93 Difference]: Finished difference Result 593 states and 928 transitions. [2023-04-03 02:06:21,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:06:21,933 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 20.428571428571427) internal successors, (143), 9 states have internal predecessors, (143), 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 163 [2023-04-03 02:06:21,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:06:21,936 INFO L225 Difference]: With dead ends: 593 [2023-04-03 02:06:21,937 INFO L226 Difference]: Without dead ends: 548 [2023-04-03 02:06:21,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:06:21,938 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1655 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 5542 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1662 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 5610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 5542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:06:21,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1662 Valid, 105 Invalid, 5610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 5542 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-04-03 02:06:21,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2023-04-03 02:06:21,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 510. [2023-04-03 02:06:21,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 476 states have (on average 1.6743697478991597) internal successors, (797), 477 states have internal predecessors, (797), 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) [2023-04-03 02:06:21,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 830 transitions. [2023-04-03 02:06:21,985 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 830 transitions. Word has length 163 [2023-04-03 02:06:21,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:06:21,986 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 830 transitions. [2023-04-03 02:06:21,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 20.428571428571427) internal successors, (143), 9 states have internal predecessors, (143), 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) [2023-04-03 02:06:21,986 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 830 transitions. [2023-04-03 02:06:21,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-04-03 02:06:21,988 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:06:21,988 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, 1] [2023-04-03 02:06:21,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:06:21,989 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:06:21,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:06:21,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1376951900, now seen corresponding path program 1 times [2023-04-03 02:06:21,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:06:21,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751757696] [2023-04-03 02:06:21,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:06:21,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:06:22,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:06:25,974 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 02:06:25,975 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:06:25,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751757696] [2023-04-03 02:06:25,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751757696] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:06:25,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:06:25,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:06:25,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845882922] [2023-04-03 02:06:25,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:06:25,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:06:25,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:06:25,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:06:25,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:06:25,978 INFO L87 Difference]: Start difference. First operand 510 states and 830 transitions. Second operand has 11 states, 7 states have (on average 20.571428571428573) internal successors, (144), 9 states have internal predecessors, (144), 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) [2023-04-03 02:06:28,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:06:28,496 INFO L93 Difference]: Finished difference Result 599 states and 933 transitions. [2023-04-03 02:06:28,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:06:28,497 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 20.571428571428573) internal successors, (144), 9 states have internal predecessors, (144), 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 164 [2023-04-03 02:06:28,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:06:28,502 INFO L225 Difference]: With dead ends: 599 [2023-04-03 02:06:28,502 INFO L226 Difference]: Without dead ends: 554 [2023-04-03 02:06:28,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:06:28,510 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1656 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 5559 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1665 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 5619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 5559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:06:28,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1665 Valid, 107 Invalid, 5619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 5559 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-04-03 02:06:28,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2023-04-03 02:06:28,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 510. [2023-04-03 02:06:28,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 476 states have (on average 1.6722689075630253) internal successors, (796), 477 states have internal predecessors, (796), 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) [2023-04-03 02:06:28,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 829 transitions. [2023-04-03 02:06:28,590 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 829 transitions. Word has length 164 [2023-04-03 02:06:28,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:06:28,591 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 829 transitions. [2023-04-03 02:06:28,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 20.571428571428573) internal successors, (144), 9 states have internal predecessors, (144), 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) [2023-04-03 02:06:28,591 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 829 transitions. [2023-04-03 02:06:28,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-04-03 02:06:28,593 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:06:28,594 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, 1, 1] [2023-04-03 02:06:28,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:06:28,594 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:06:28,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:06:28,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1073847632, now seen corresponding path program 1 times [2023-04-03 02:06:28,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:06:28,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589930294] [2023-04-03 02:06:28,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:06:28,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:06:28,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:06:32,532 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 02:06:32,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:06:32,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589930294] [2023-04-03 02:06:32,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589930294] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:06:32,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:06:32,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:06:32,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943071287] [2023-04-03 02:06:32,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:06:32,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:06:32,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:06:32,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:06:32,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:06:32,535 INFO L87 Difference]: Start difference. First operand 510 states and 829 transitions. Second operand has 11 states, 7 states have (on average 20.714285714285715) internal successors, (145), 9 states have internal predecessors, (145), 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) [2023-04-03 02:06:35,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:06:35,114 INFO L93 Difference]: Finished difference Result 605 states and 938 transitions. [2023-04-03 02:06:35,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:06:35,115 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 20.714285714285715) internal successors, (145), 9 states have internal predecessors, (145), 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 165 [2023-04-03 02:06:35,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:06:35,118 INFO L225 Difference]: With dead ends: 605 [2023-04-03 02:06:35,118 INFO L226 Difference]: Without dead ends: 560 [2023-04-03 02:06:35,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:06:35,120 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 877 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 5596 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 5654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 5596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:06:35,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [888 Valid, 117 Invalid, 5654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 5596 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-04-03 02:06:35,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2023-04-03 02:06:35,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 510. [2023-04-03 02:06:35,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 476 states have (on average 1.6701680672268908) internal successors, (795), 477 states have internal predecessors, (795), 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) [2023-04-03 02:06:35,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 828 transitions. [2023-04-03 02:06:35,170 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 828 transitions. Word has length 165 [2023-04-03 02:06:35,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:06:35,171 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 828 transitions. [2023-04-03 02:06:35,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 20.714285714285715) internal successors, (145), 9 states have internal predecessors, (145), 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) [2023-04-03 02:06:35,171 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 828 transitions. [2023-04-03 02:06:35,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-04-03 02:06:35,173 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:06:35,173 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, 1, 1, 1, 1] [2023-04-03 02:06:35,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:06:35,173 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:06:35,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:06:35,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1561831848, now seen corresponding path program 1 times [2023-04-03 02:06:35,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:06:35,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446334080] [2023-04-03 02:06:35,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:06:35,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:06:36,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:06:44,112 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 02:06:44,112 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:06:44,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446334080] [2023-04-03 02:06:44,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446334080] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:06:44,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:06:44,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2023-04-03 02:06:44,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47650783] [2023-04-03 02:06:44,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:06:44,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-03 02:06:44,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:06:44,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-03 02:06:44,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2023-04-03 02:06:44,115 INFO L87 Difference]: Start difference. First operand 510 states and 828 transitions. Second operand has 24 states, 12 states have (on average 12.25) internal successors, (147), 14 states have internal predecessors, (147), 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) [2023-04-03 02:06:50,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:06:50,580 INFO L93 Difference]: Finished difference Result 628 states and 973 transitions. [2023-04-03 02:06:50,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-04-03 02:06:50,580 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 12 states have (on average 12.25) internal successors, (147), 14 states have internal predecessors, (147), 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 167 [2023-04-03 02:06:50,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:06:50,583 INFO L225 Difference]: With dead ends: 628 [2023-04-03 02:06:50,583 INFO L226 Difference]: Without dead ends: 580 [2023-04-03 02:06:50,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=549, Invalid=1803, Unknown=0, NotChecked=0, Total=2352 [2023-04-03 02:06:50,585 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 5641 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 9732 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5645 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 9888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 9732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:06:50,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5645 Valid, 266 Invalid, 9888 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [156 Valid, 9732 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-04-03 02:06:50,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2023-04-03 02:06:50,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 514. [2023-04-03 02:06:50,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 480 states have (on average 1.6666666666666667) internal successors, (800), 481 states have internal predecessors, (800), 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) [2023-04-03 02:06:50,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 833 transitions. [2023-04-03 02:06:50,678 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 833 transitions. Word has length 167 [2023-04-03 02:06:50,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:06:50,679 INFO L495 AbstractCegarLoop]: Abstraction has 514 states and 833 transitions. [2023-04-03 02:06:50,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 12 states have (on average 12.25) internal successors, (147), 14 states have internal predecessors, (147), 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) [2023-04-03 02:06:50,679 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 833 transitions. [2023-04-03 02:06:50,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-04-03 02:06:50,681 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:06:50,681 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, 1, 1, 1, 1, 1] [2023-04-03 02:06:50,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:06:50,681 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:06:50,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:06:50,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1689128475, now seen corresponding path program 1 times [2023-04-03 02:06:50,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:06:50,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832681268] [2023-04-03 02:06:50,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:06:50,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:06:50,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:06:52,379 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 02:06:52,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:06:52,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832681268] [2023-04-03 02:06:52,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832681268] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:06:52,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:06:52,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:06:52,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100716492] [2023-04-03 02:06:52,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:06:52,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:06:52,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:06:52,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:06:52,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:06:52,382 INFO L87 Difference]: Start difference. First operand 514 states and 833 transitions. Second operand has 11 states, 7 states have (on average 21.142857142857142) internal successors, (148), 9 states have internal predecessors, (148), 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) [2023-04-03 02:06:54,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:06:54,823 INFO L93 Difference]: Finished difference Result 592 states and 930 transitions. [2023-04-03 02:06:54,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:06:54,824 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 21.142857142857142) internal successors, (148), 9 states have internal predecessors, (148), 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 168 [2023-04-03 02:06:54,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:06:54,826 INFO L225 Difference]: With dead ends: 592 [2023-04-03 02:06:54,826 INFO L226 Difference]: Without dead ends: 539 [2023-04-03 02:06:54,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:06:54,827 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1620 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 5509 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1623 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 5569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 5509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:06:54,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1623 Valid, 102 Invalid, 5569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 5509 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-03 02:06:54,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2023-04-03 02:06:54,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 512. [2023-04-03 02:06:54,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 478 states have (on average 1.6569037656903767) internal successors, (792), 479 states have internal predecessors, (792), 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) [2023-04-03 02:06:54,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 825 transitions. [2023-04-03 02:06:54,920 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 825 transitions. Word has length 168 [2023-04-03 02:06:54,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:06:54,921 INFO L495 AbstractCegarLoop]: Abstraction has 512 states and 825 transitions. [2023-04-03 02:06:54,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 21.142857142857142) internal successors, (148), 9 states have internal predecessors, (148), 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) [2023-04-03 02:06:54,921 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 825 transitions. [2023-04-03 02:06:54,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-04-03 02:06:54,923 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:06:54,923 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, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:06:54,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:06:54,923 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:06:54,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:06:54,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1760255423, now seen corresponding path program 1 times [2023-04-03 02:06:54,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:06:54,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4821104] [2023-04-03 02:06:54,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:06:54,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:06:55,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:07:01,687 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 02:07:01,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:07:01,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4821104] [2023-04-03 02:07:01,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4821104] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:07:01,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:07:01,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2023-04-03 02:07:01,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005226645] [2023-04-03 02:07:01,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:07:01,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-03 02:07:01,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:07:01,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-03 02:07:01,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2023-04-03 02:07:01,691 INFO L87 Difference]: Start difference. First operand 512 states and 825 transitions. Second operand has 24 states, 12 states have (on average 12.5) internal successors, (150), 14 states have internal predecessors, (150), 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) [2023-04-03 02:07:06,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:07:06,815 INFO L93 Difference]: Finished difference Result 607 states and 935 transitions. [2023-04-03 02:07:06,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-04-03 02:07:06,816 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 12 states have (on average 12.5) internal successors, (150), 14 states have internal predecessors, (150), 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 170 [2023-04-03 02:07:06,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:07:06,819 INFO L225 Difference]: With dead ends: 607 [2023-04-03 02:07:06,819 INFO L226 Difference]: Without dead ends: 559 [2023-04-03 02:07:06,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=569, Invalid=1881, Unknown=0, NotChecked=0, Total=2450 [2023-04-03 02:07:06,821 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 4762 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 8866 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4765 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 9021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 8866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:07:06,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4765 Valid, 228 Invalid, 9021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 8866 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-04-03 02:07:06,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2023-04-03 02:07:06,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 512. [2023-04-03 02:07:06,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 478 states have (on average 1.6548117154811715) internal successors, (791), 479 states have internal predecessors, (791), 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) [2023-04-03 02:07:06,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 824 transitions. [2023-04-03 02:07:06,913 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 824 transitions. Word has length 170 [2023-04-03 02:07:06,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:07:06,913 INFO L495 AbstractCegarLoop]: Abstraction has 512 states and 824 transitions. [2023-04-03 02:07:06,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 12 states have (on average 12.5) internal successors, (150), 14 states have internal predecessors, (150), 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) [2023-04-03 02:07:06,913 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 824 transitions. [2023-04-03 02:07:06,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-04-03 02:07:06,915 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:07:06,916 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:07:06,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 02:07:06,916 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:07:06,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:07:06,916 INFO L85 PathProgramCache]: Analyzing trace with hash -415251358, now seen corresponding path program 1 times [2023-04-03 02:07:06,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:07:06,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958708777] [2023-04-03 02:07:06,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:07:06,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:07:07,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:07:10,620 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 02:07:10,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:07:10,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958708777] [2023-04-03 02:07:10,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958708777] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:07:10,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:07:10,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-04-03 02:07:10,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438618340] [2023-04-03 02:07:10,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:07:10,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-03 02:07:10,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:07:10,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-03 02:07:10,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-04-03 02:07:10,622 INFO L87 Difference]: Start difference. First operand 512 states and 824 transitions. Second operand has 13 states, 8 states have (on average 18.875) internal successors, (151), 10 states have internal predecessors, (151), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2023-04-03 02:07:11,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:07:11,394 INFO L93 Difference]: Finished difference Result 595 states and 932 transitions. [2023-04-03 02:07:11,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-03 02:07:11,394 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 18.875) internal successors, (151), 10 states have internal predecessors, (151), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 171 [2023-04-03 02:07:11,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:07:11,398 INFO L225 Difference]: With dead ends: 595 [2023-04-03 02:07:11,399 INFO L226 Difference]: Without dead ends: 549 [2023-04-03 02:07:11,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2023-04-03 02:07:11,400 INFO L413 NwaCegarLoop]: 728 mSDtfsCounter, 40 mSDsluCounter, 7941 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 8669 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 02:07:11,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 8669 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 02:07:11,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2023-04-03 02:07:11,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 520. [2023-04-03 02:07:11,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 483 states have (on average 1.6438923395445135) internal successors, (794), 485 states have internal predecessors, (794), 18 states have call successors, (18), 18 states have call predecessors, (18), 18 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2023-04-03 02:07:11,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 830 transitions. [2023-04-03 02:07:11,517 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 830 transitions. Word has length 171 [2023-04-03 02:07:11,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:07:11,517 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 830 transitions. [2023-04-03 02:07:11,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 18.875) internal successors, (151), 10 states have internal predecessors, (151), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2023-04-03 02:07:11,517 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 830 transitions. [2023-04-03 02:07:11,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-04-03 02:07:11,520 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:07:11,520 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:07:11,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-03 02:07:11,521 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:07:11,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:07:11,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1791594333, now seen corresponding path program 1 times [2023-04-03 02:07:11,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:07:11,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976554577] [2023-04-03 02:07:11,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:07:11,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:07:11,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:07:24,848 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 02:07:24,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:07:24,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976554577] [2023-04-03 02:07:24,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976554577] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:07:24,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323848430] [2023-04-03 02:07:24,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:07:24,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:07:24,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:07:24,851 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 02:07:24,852 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 02:07:25,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:07:25,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 2519 conjuncts, 118 conjunts are in the unsatisfiable core [2023-04-03 02:07:25,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:08:08,837 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:08:08,837 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:08:09,640 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 39063 disjunctions. This might take some time...