/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.4.4.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:03:29,528 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:03:29,529 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:03:29,547 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:03:29,547 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:03:29,548 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:03:29,549 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:03:29,550 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:03:29,551 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:03:29,552 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:03:29,552 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:03:29,553 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:03:29,554 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:03:29,554 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:03:29,555 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:03:29,556 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:03:29,556 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:03:29,557 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:03:29,558 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:03:29,559 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:03:29,560 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:03:29,561 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:03:29,561 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:03:29,562 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:03:29,564 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 02:03:29,564 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 02:03:29,564 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 02:03:29,565 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 02:03:29,565 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 02:03:29,566 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 02:03:29,566 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 02:03:29,566 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 02:03:29,567 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 02:03:29,567 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 02:03:29,568 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 02:03:29,568 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 02:03:29,568 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 02:03:29,569 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 02:03:29,569 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:03:29,569 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:03:29,570 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:03:29,570 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 02:03:29,584 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:03:29,585 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:03:29,585 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:03:29,585 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:03:29,585 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:03:29,585 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:03:29,586 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:03:29,586 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:03:29,586 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:03:29,586 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:03:29,586 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:03:29,586 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:03:29,586 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:03:29,586 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:03:29,586 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:03:29,586 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:03:29,587 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:03:29,587 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:03:29,587 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:03:29,587 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:03:29,587 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:03:29,587 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:03:29,587 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:03:29,587 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:03:29,588 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:03:29,588 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:03:29,588 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:03:29,588 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:03:29,588 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:03:29,588 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:03:29,588 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:03:29,588 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:03:29,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:03:29,588 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:03:29,588 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:03:29,589 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:03:29,589 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:03:29,589 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:03:29,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:03:29,589 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:03:29,589 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:03:29,589 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:03:29,718 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:03:29,735 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:03:29,736 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:03:29,737 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:03:29,740 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:03:29,741 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c [2023-04-03 02:03:30,669 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:03:30,906 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:03:30,906 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c [2023-04-03 02:03:30,926 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b87251859/e5b2bc9562a34dbba0fa72d12c6485fd/FLAG811437d1d [2023-04-03 02:03:30,935 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b87251859/e5b2bc9562a34dbba0fa72d12c6485fd [2023-04-03 02:03:30,937 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:03:30,938 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:03:30,939 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:03:30,939 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:03:30,943 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:03:30,943 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:03:30" (1/1) ... [2023-04-03 02:03:30,944 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72ce1b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:03:30, skipping insertion in model container [2023-04-03 02:03:30,944 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:03:30" (1/1) ... [2023-04-03 02:03:30,960 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:03:30,988 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:03:31,143 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.4.4.ufo.UNBOUNDED.pals.c[31172,31185] [2023-04-03 02:03:31,145 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:03:31,153 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:03:31,222 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.4.4.ufo.UNBOUNDED.pals.c[31172,31185] [2023-04-03 02:03:31,222 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:03:31,233 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:03:31,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:03:31 WrapperNode [2023-04-03 02:03:31,233 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:03:31,234 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:03:31,234 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:03:31,234 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:03:31,242 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:03:31" (1/1) ... [2023-04-03 02:03:31,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:03:31" (1/1) ... [2023-04-03 02:03:31,252 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:03:31" (1/1) ... [2023-04-03 02:03:31,252 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:03:31" (1/1) ... [2023-04-03 02:03:31,277 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:03:31" (1/1) ... [2023-04-03 02:03:31,288 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:03:31" (1/1) ... [2023-04-03 02:03:31,301 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:03:31" (1/1) ... [2023-04-03 02:03:31,303 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:03:31" (1/1) ... [2023-04-03 02:03:31,307 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:03:31,308 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:03:31,308 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:03:31,308 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:03:31,309 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:03:31" (1/1) ... [2023-04-03 02:03:31,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:03:31,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:03:31,344 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 02:03:31,351 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 02:03:31,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:03:31,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:03:31,373 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:03:31,374 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:03:31,374 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-03 02:03:31,375 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-03 02:03:31,375 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-03 02:03:31,375 INFO L138 BoogieDeclarations]: Found implementation of procedure node4 [2023-04-03 02:03:31,375 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-03 02:03:31,375 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-03 02:03:31,375 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:03:31,375 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-03 02:03:31,375 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:03:31,375 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:03:31,375 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:03:31,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:03:31,375 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:03:31,375 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-03 02:03:31,375 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:03:31,376 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:03:31,376 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:03:31,376 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:03:31,376 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:03:31,376 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:03:31,376 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:03:31,376 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:03:31,376 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-03 02:03:31,376 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:03:31,376 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:03:31,376 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:03:31,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:03:31,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:03:31,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:03:31,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:03:31,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:03:31,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:03:31,539 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:03:31,541 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:03:32,243 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:03:32,901 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:03:32,901 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-03 02:03:32,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:03:32 BoogieIcfgContainer [2023-04-03 02:03:32,905 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:03:32,907 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:03:32,907 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:03:32,909 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:03:32,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:03:30" (1/3) ... [2023-04-03 02:03:32,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5811db96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:03:32, skipping insertion in model container [2023-04-03 02:03:32,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:03:31" (2/3) ... [2023-04-03 02:03:32,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5811db96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:03:32, skipping insertion in model container [2023-04-03 02:03:32,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:03:32" (3/3) ... [2023-04-03 02:03:32,911 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c [2023-04-03 02:03:32,922 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:03:32,922 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 02:03:32,959 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:03:32,963 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;@49f85358, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:03:32,963 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 02:03:32,967 INFO L276 IsEmpty]: Start isEmpty. Operand has 174 states, 152 states have (on average 1.5657894736842106) internal successors, (238), 154 states have internal predecessors, (238), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-03 02:03:32,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-03 02:03:32,977 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:03:32,978 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] [2023-04-03 02:03:32,979 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:03:32,983 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:03:32,984 INFO L85 PathProgramCache]: Analyzing trace with hash -388303279, now seen corresponding path program 1 times [2023-04-03 02:03:32,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:03:32,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425428000] [2023-04-03 02:03:32,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:03:32,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:03:33,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:03:38,265 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 02:03:38,265 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:03:38,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425428000] [2023-04-03 02:03:38,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425428000] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:03:38,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:03:38,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-03 02:03:38,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289810167] [2023-04-03 02:03:38,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:03:38,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-03 02:03:38,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:03:38,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-03 02:03:38,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2023-04-03 02:03:38,311 INFO L87 Difference]: Start difference. First operand has 174 states, 152 states have (on average 1.5657894736842106) internal successors, (238), 154 states have internal predecessors, (238), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 20 states, 10 states have (on average 6.7) internal successors, (67), 12 states have internal predecessors, (67), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-03 02:03:40,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:03:40,182 INFO L93 Difference]: Finished difference Result 266 states and 386 transitions. [2023-04-03 02:03:40,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-04-03 02:03:40,184 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 10 states have (on average 6.7) internal successors, (67), 12 states have internal predecessors, (67), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 85 [2023-04-03 02:03:40,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:03:40,191 INFO L225 Difference]: With dead ends: 266 [2023-04-03 02:03:40,191 INFO L226 Difference]: Without dead ends: 225 [2023-04-03 02:03:40,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=304, Invalid=956, Unknown=0, NotChecked=0, Total=1260 [2023-04-03 02:03:40,195 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 1380 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 2372 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1383 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 2482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 2372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:03:40,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1383 Valid, 138 Invalid, 2482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 2372 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-03 02:03:40,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-04-03 02:03:40,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 201. [2023-04-03 02:03:40,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 171 states have (on average 1.5497076023391814) internal successors, (265), 172 states have internal predecessors, (265), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2023-04-03 02:03:40,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 295 transitions. [2023-04-03 02:03:40,242 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 295 transitions. Word has length 85 [2023-04-03 02:03:40,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:03:40,243 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 295 transitions. [2023-04-03 02:03:40,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 10 states have (on average 6.7) internal successors, (67), 12 states have internal predecessors, (67), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-03 02:03:40,243 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 295 transitions. [2023-04-03 02:03:40,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-03 02:03:40,245 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:03:40,245 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] [2023-04-03 02:03:40,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:03:40,246 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:03:40,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:03:40,246 INFO L85 PathProgramCache]: Analyzing trace with hash 661752629, now seen corresponding path program 1 times [2023-04-03 02:03:40,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:03:40,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592854839] [2023-04-03 02:03:40,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:03:40,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:03:40,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:03:42,258 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 02:03:42,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:03:42,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592854839] [2023-04-03 02:03:42,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592854839] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:03:42,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:03:42,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:03:42,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041189467] [2023-04-03 02:03:42,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:03:42,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:03:42,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:03:42,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:03:42,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:03:42,267 INFO L87 Difference]: Start difference. First operand 201 states and 295 transitions. Second operand has 11 states, 7 states have (on average 9.714285714285714) internal successors, (68), 9 states have internal predecessors, (68), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-03 02:03:43,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:03:43,191 INFO L93 Difference]: Finished difference Result 277 states and 392 transitions. [2023-04-03 02:03:43,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:03:43,191 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 9.714285714285714) internal successors, (68), 9 states have internal predecessors, (68), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 86 [2023-04-03 02:03:43,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:03:43,193 INFO L225 Difference]: With dead ends: 277 [2023-04-03 02:03:43,193 INFO L226 Difference]: Without dead ends: 232 [2023-04-03 02:03:43,194 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 02:03:43,195 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 309 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 1790 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 1822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-03 02:03:43,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 93 Invalid, 1822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1790 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-03 02:03:43,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2023-04-03 02:03:43,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 201. [2023-04-03 02:03:43,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 171 states have (on average 1.543859649122807) internal successors, (264), 172 states have internal predecessors, (264), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-03 02:03:43,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 293 transitions. [2023-04-03 02:03:43,215 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 293 transitions. Word has length 86 [2023-04-03 02:03:43,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:03:43,215 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 293 transitions. [2023-04-03 02:03:43,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 9.714285714285714) internal successors, (68), 9 states have internal predecessors, (68), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-03 02:03:43,215 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 293 transitions. [2023-04-03 02:03:43,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-03 02:03:43,216 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:03:43,216 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] [2023-04-03 02:03:43,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:03:43,217 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:03:43,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:03:43,217 INFO L85 PathProgramCache]: Analyzing trace with hash -39541190, now seen corresponding path program 1 times [2023-04-03 02:03:43,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:03:43,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093716240] [2023-04-03 02:03:43,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:03:43,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:03:43,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:03:45,121 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 02:03:45,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:03:45,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093716240] [2023-04-03 02:03:45,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093716240] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:03:45,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:03:45,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:03:45,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233152753] [2023-04-03 02:03:45,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:03:45,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:03:45,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:03:45,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:03:45,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:03:45,125 INFO L87 Difference]: Start difference. First operand 201 states and 293 transitions. Second operand has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 9 states have internal predecessors, (69), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-03 02:03:46,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:03:46,133 INFO L93 Difference]: Finished difference Result 271 states and 376 transitions. [2023-04-03 02:03:46,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:03:46,133 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 9 states have internal predecessors, (69), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 87 [2023-04-03 02:03:46,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:03:46,135 INFO L225 Difference]: With dead ends: 271 [2023-04-03 02:03:46,135 INFO L226 Difference]: Without dead ends: 231 [2023-04-03 02:03:46,135 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 02:03:46,136 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 570 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 2051 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 2089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-03 02:03:46,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [575 Valid, 96 Invalid, 2089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2051 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-03 02:03:46,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2023-04-03 02:03:46,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 201. [2023-04-03 02:03:46,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 171 states have (on average 1.5380116959064327) internal successors, (263), 172 states have internal predecessors, (263), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-03 02:03:46,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 292 transitions. [2023-04-03 02:03:46,177 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 292 transitions. Word has length 87 [2023-04-03 02:03:46,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:03:46,178 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 292 transitions. [2023-04-03 02:03:46,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 9 states have internal predecessors, (69), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-03 02:03:46,180 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 292 transitions. [2023-04-03 02:03:46,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-03 02:03:46,185 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:03:46,185 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] [2023-04-03 02:03:46,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:03:46,185 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:03:46,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:03:46,186 INFO L85 PathProgramCache]: Analyzing trace with hash 801898302, now seen corresponding path program 1 times [2023-04-03 02:03:46,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:03:46,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284794757] [2023-04-03 02:03:46,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:03:46,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:03:46,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:03:47,846 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 02:03:47,846 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:03:47,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284794757] [2023-04-03 02:03:47,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284794757] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:03:47,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:03:47,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:03:47,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924683713] [2023-04-03 02:03:47,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:03:47,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:03:47,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:03:47,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:03:47,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:03:47,848 INFO L87 Difference]: Start difference. First operand 201 states and 292 transitions. Second operand has 11 states, 7 states have (on average 10.0) internal successors, (70), 9 states have internal predecessors, (70), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-03 02:03:48,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:03:48,828 INFO L93 Difference]: Finished difference Result 277 states and 381 transitions. [2023-04-03 02:03:48,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:03:48,828 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 10.0) internal successors, (70), 9 states have internal predecessors, (70), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 88 [2023-04-03 02:03:48,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:03:48,829 INFO L225 Difference]: With dead ends: 277 [2023-04-03 02:03:48,830 INFO L226 Difference]: Without dead ends: 237 [2023-04-03 02:03:48,830 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 02:03:48,831 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 573 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 2071 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 2111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 2071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-03 02:03:48,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [580 Valid, 98 Invalid, 2111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 2071 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-03 02:03:48,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2023-04-03 02:03:48,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 201. [2023-04-03 02:03:48,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 171 states have (on average 1.5321637426900585) internal successors, (262), 172 states have internal predecessors, (262), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-03 02:03:48,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 291 transitions. [2023-04-03 02:03:48,856 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 291 transitions. Word has length 88 [2023-04-03 02:03:48,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:03:48,856 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 291 transitions. [2023-04-03 02:03:48,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 10.0) internal successors, (70), 9 states have internal predecessors, (70), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-03 02:03:48,856 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 291 transitions. [2023-04-03 02:03:48,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-04-03 02:03:48,857 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:03:48,858 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:03:48,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:03:48,858 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:03:48,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:03:48,858 INFO L85 PathProgramCache]: Analyzing trace with hash -2071537117, now seen corresponding path program 1 times [2023-04-03 02:03:48,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:03:48,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342343199] [2023-04-03 02:03:48,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:03:48,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:03:48,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:03:50,492 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 02:03:50,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:03:50,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342343199] [2023-04-03 02:03:50,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342343199] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:03:50,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:03:50,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:03:50,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262277263] [2023-04-03 02:03:50,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:03:50,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:03:50,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:03:50,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:03:50,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:03:50,498 INFO L87 Difference]: Start difference. First operand 201 states and 291 transitions. Second operand has 11 states, 7 states have (on average 10.142857142857142) internal successors, (71), 9 states have internal predecessors, (71), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-03 02:03:51,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:03:51,479 INFO L93 Difference]: Finished difference Result 283 states and 386 transitions. [2023-04-03 02:03:51,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:03:51,479 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 10.142857142857142) internal successors, (71), 9 states have internal predecessors, (71), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 89 [2023-04-03 02:03:51,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:03:51,480 INFO L225 Difference]: With dead ends: 283 [2023-04-03 02:03:51,480 INFO L226 Difference]: Without dead ends: 243 [2023-04-03 02:03:51,481 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 02:03:51,481 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 582 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1826 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 1882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-03 02:03:51,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [591 Valid, 93 Invalid, 1882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1826 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-03 02:03:51,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2023-04-03 02:03:51,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 201. [2023-04-03 02:03:51,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 171 states have (on average 1.5263157894736843) internal successors, (261), 172 states have internal predecessors, (261), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-03 02:03:51,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 290 transitions. [2023-04-03 02:03:51,506 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 290 transitions. Word has length 89 [2023-04-03 02:03:51,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:03:51,507 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 290 transitions. [2023-04-03 02:03:51,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 10.142857142857142) internal successors, (71), 9 states have internal predecessors, (71), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-03 02:03:51,507 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 290 transitions. [2023-04-03 02:03:51,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-04-03 02:03:51,511 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:03:51,511 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] [2023-04-03 02:03:51,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:03:51,511 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:03:51,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:03:51,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1180895573, now seen corresponding path program 1 times [2023-04-03 02:03:51,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:03:51,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218848461] [2023-04-03 02:03:51,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:03:51,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:03:51,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:03:54,946 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 02:03:54,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:03:54,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218848461] [2023-04-03 02:03:54,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218848461] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:03:54,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:03:54,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-04-03 02:03:54,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398328011] [2023-04-03 02:03:54,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:03:54,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-03 02:03:54,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:03:54,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-03 02:03:54,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2023-04-03 02:03:54,948 INFO L87 Difference]: Start difference. First operand 201 states and 290 transitions. Second operand has 21 states, 11 states have (on average 6.636363636363637) internal successors, (73), 13 states have internal predecessors, (73), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-03 02:03:57,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:03:57,111 INFO L93 Difference]: Finished difference Result 295 states and 406 transitions. [2023-04-03 02:03:57,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-04-03 02:03:57,111 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 11 states have (on average 6.636363636363637) internal successors, (73), 13 states have internal predecessors, (73), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 91 [2023-04-03 02:03:57,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:03:57,113 INFO L225 Difference]: With dead ends: 295 [2023-04-03 02:03:57,113 INFO L226 Difference]: Without dead ends: 251 [2023-04-03 02:03:57,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=435, Invalid=1457, Unknown=0, NotChecked=0, Total=1892 [2023-04-03 02:03:57,114 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1799 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2431 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1802 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 2606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 2431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:03:57,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1802 Valid, 155 Invalid, 2606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 2431 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-03 02:03:57,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2023-04-03 02:03:57,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 205. [2023-04-03 02:03:57,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 175 states have (on average 1.5085714285714287) internal successors, (264), 176 states have internal predecessors, (264), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-03 02:03:57,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 293 transitions. [2023-04-03 02:03:57,138 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 293 transitions. Word has length 91 [2023-04-03 02:03:57,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:03:57,138 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 293 transitions. [2023-04-03 02:03:57,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 11 states have (on average 6.636363636363637) internal successors, (73), 13 states have internal predecessors, (73), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-03 02:03:57,139 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 293 transitions. [2023-04-03 02:03:57,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-04-03 02:03:57,139 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:03:57,139 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] [2023-04-03 02:03:57,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:03:57,140 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:03:57,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:03:57,140 INFO L85 PathProgramCache]: Analyzing trace with hash 790682101, now seen corresponding path program 1 times [2023-04-03 02:03:57,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:03:57,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28147645] [2023-04-03 02:03:57,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:03:57,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:03:57,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:03:59,018 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 02:03:59,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:03:59,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28147645] [2023-04-03 02:03:59,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28147645] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:03:59,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:03:59,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:03:59,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377932579] [2023-04-03 02:03:59,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:03:59,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:03:59,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:03:59,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:03:59,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:03:59,020 INFO L87 Difference]: Start difference. First operand 205 states and 293 transitions. Second operand has 11 states, 7 states have (on average 10.571428571428571) internal successors, (74), 9 states have internal predecessors, (74), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-03 02:04:00,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:04:00,113 INFO L93 Difference]: Finished difference Result 294 states and 404 transitions. [2023-04-03 02:04:00,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:04:00,114 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 10.571428571428571) internal successors, (74), 9 states have internal predecessors, (74), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 92 [2023-04-03 02:04:00,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:04:00,115 INFO L225 Difference]: With dead ends: 294 [2023-04-03 02:04:00,115 INFO L226 Difference]: Without dead ends: 246 [2023-04-03 02:04:00,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:04:00,116 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 316 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 2181 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 2208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:04:00,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 117 Invalid, 2208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 2181 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-03 02:04:00,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-04-03 02:04:00,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 233. [2023-04-03 02:04:00,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 191 states have (on average 1.4659685863874345) internal successors, (280), 192 states have internal predecessors, (280), 21 states have call successors, (21), 21 states have call predecessors, (21), 20 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2023-04-03 02:04:00,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 322 transitions. [2023-04-03 02:04:00,142 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 322 transitions. Word has length 92 [2023-04-03 02:04:00,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:04:00,142 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 322 transitions. [2023-04-03 02:04:00,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 10.571428571428571) internal successors, (74), 9 states have internal predecessors, (74), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-03 02:04:00,143 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 322 transitions. [2023-04-03 02:04:00,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-03 02:04:00,143 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:04:00,143 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] [2023-04-03 02:04:00,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:04:00,144 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:04:00,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:04:00,144 INFO L85 PathProgramCache]: Analyzing trace with hash -495969989, now seen corresponding path program 1 times [2023-04-03 02:04:00,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:04:00,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100486310] [2023-04-03 02:04:00,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:04:00,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:04:00,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:04:03,019 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 02:04:03,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:04:03,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100486310] [2023-04-03 02:04:03,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100486310] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:04:03,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:04:03,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-04-03 02:04:03,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825778297] [2023-04-03 02:04:03,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:04:03,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-03 02:04:03,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:04:03,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-03 02:04:03,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2023-04-03 02:04:03,022 INFO L87 Difference]: Start difference. First operand 233 states and 322 transitions. Second operand has 21 states, 11 states have (on average 6.909090909090909) internal successors, (76), 13 states have internal predecessors, (76), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-03 02:04:04,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:04:04,961 INFO L93 Difference]: Finished difference Result 364 states and 473 transitions. [2023-04-03 02:04:04,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-04-03 02:04:04,962 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 11 states have (on average 6.909090909090909) internal successors, (76), 13 states have internal predecessors, (76), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 94 [2023-04-03 02:04:04,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:04:04,963 INFO L225 Difference]: With dead ends: 364 [2023-04-03 02:04:04,963 INFO L226 Difference]: Without dead ends: 291 [2023-04-03 02:04:04,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=454, Invalid=1526, Unknown=0, NotChecked=0, Total=1980 [2023-04-03 02:04:04,965 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1833 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2461 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1837 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 2632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 2461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:04:04,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1837 Valid, 160 Invalid, 2632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 2461 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-03 02:04:04,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2023-04-03 02:04:04,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 235. [2023-04-03 02:04:04,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 192 states have (on average 1.4583333333333333) internal successors, (280), 194 states have internal predecessors, (280), 21 states have call successors, (21), 21 states have call predecessors, (21), 21 states have return successors, (22), 19 states have call predecessors, (22), 20 states have call successors, (22) [2023-04-03 02:04:05,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 323 transitions. [2023-04-03 02:04:05,001 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 323 transitions. Word has length 94 [2023-04-03 02:04:05,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:04:05,001 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 323 transitions. [2023-04-03 02:04:05,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 11 states have (on average 6.909090909090909) internal successors, (76), 13 states have internal predecessors, (76), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-03 02:04:05,001 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 323 transitions. [2023-04-03 02:04:05,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-04-03 02:04:05,002 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:04:05,002 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] [2023-04-03 02:04:05,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:04:05,002 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:04:05,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:04:05,003 INFO L85 PathProgramCache]: Analyzing trace with hash 683016016, now seen corresponding path program 1 times [2023-04-03 02:04:05,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:04:05,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005647034] [2023-04-03 02:04:05,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:04:05,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:04:05,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:04:06,589 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 02:04:06,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:04:06,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005647034] [2023-04-03 02:04:06,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005647034] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:04:06,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:04:06,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-04-03 02:04:06,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007807853] [2023-04-03 02:04:06,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:04:06,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-03 02:04:06,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:04:06,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-03 02:04:06,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-04-03 02:04:06,592 INFO L87 Difference]: Start difference. First operand 235 states and 323 transitions. Second operand has 13 states, 8 states have (on average 9.625) internal successors, (77), 10 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-03 02:04:06,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:04:06,961 INFO L93 Difference]: Finished difference Result 269 states and 366 transitions. [2023-04-03 02:04:06,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-03 02:04:06,961 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 9.625) internal successors, (77), 10 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 95 [2023-04-03 02:04:06,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:04:06,962 INFO L225 Difference]: With dead ends: 269 [2023-04-03 02:04:06,962 INFO L226 Difference]: Without dead ends: 267 [2023-04-03 02:04:06,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2023-04-03 02:04:06,963 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 36 mSDsluCounter, 2460 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 2691 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:04:06,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 2691 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:04:06,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2023-04-03 02:04:07,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 243. [2023-04-03 02:04:07,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 197 states have (on average 1.4467005076142132) internal successors, (285), 200 states have internal predecessors, (285), 22 states have call successors, (22), 22 states have call predecessors, (22), 23 states have return successors, (24), 20 states have call predecessors, (24), 21 states have call successors, (24) [2023-04-03 02:04:07,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 331 transitions. [2023-04-03 02:04:07,036 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 331 transitions. Word has length 95 [2023-04-03 02:04:07,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:04:07,036 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 331 transitions. [2023-04-03 02:04:07,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 9.625) internal successors, (77), 10 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-03 02:04:07,036 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 331 transitions. [2023-04-03 02:04:07,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-04-03 02:04:07,037 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:04:07,037 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:04:07,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 02:04:07,037 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:04:07,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:04:07,038 INFO L85 PathProgramCache]: Analyzing trace with hash -699775038, now seen corresponding path program 1 times [2023-04-03 02:04:07,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:04:07,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469614029] [2023-04-03 02:04:07,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:04:07,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:04:07,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:05:09,466 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 02:05:09,466 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:05:09,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469614029] [2023-04-03 02:05:09,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469614029] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:05:09,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146376696] [2023-04-03 02:05:09,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:05:09,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:05:09,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:05:09,469 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 02:05:09,473 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 02:05:09,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:05:09,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 1646 conjuncts, 99 conjunts are in the unsatisfiable core [2023-04-03 02:05:09,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:05:33,797 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:05:33,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:05:34,655 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 19690 disjunctions. This might take some time... [2023-04-03 02:05:51,659 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 19690 disjunctions.