/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_floodmax.4.ufo.BOUNDED-8.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 01:38:43,499 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 01:38:43,501 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 01:38:43,540 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 01:38:43,541 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 01:38:43,543 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 01:38:43,548 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 01:38:43,550 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 01:38:43,551 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 01:38:43,555 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 01:38:43,557 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 01:38:43,558 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 01:38:43,558 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 01:38:43,560 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 01:38:43,561 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 01:38:43,562 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 01:38:43,563 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 01:38:43,564 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 01:38:43,565 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 01:38:43,570 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 01:38:43,571 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 01:38:43,571 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 01:38:43,573 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 01:38:43,574 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 01:38:43,581 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 01:38:43,582 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 01:38:43,582 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 01:38:43,583 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 01:38:43,584 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 01:38:43,584 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 01:38:43,585 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 01:38:43,585 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 01:38:43,586 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 01:38:43,587 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 01:38:43,587 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 01:38:43,588 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 01:38:43,588 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 01:38:43,588 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 01:38:43,588 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 01:38:43,589 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 01:38:43,590 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 01:38:43,591 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 01:38:43,619 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 01:38:43,619 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 01:38:43,619 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 01:38:43,619 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 01:38:43,620 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 01:38:43,620 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 01:38:43,621 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 01:38:43,621 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 01:38:43,621 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 01:38:43,621 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 01:38:43,622 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 01:38:43,622 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 01:38:43,622 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 01:38:43,622 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 01:38:43,622 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 01:38:43,622 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 01:38:43,623 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 01:38:43,623 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 01:38:43,623 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 01:38:43,623 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 01:38:43,624 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 01:38:43,624 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 01:38:43,624 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 01:38:43,624 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 01:38:43,624 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 01:38:43,625 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 01:38:43,625 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 01:38:43,625 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 01:38:43,625 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 01:38:43,625 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 01:38:43,625 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 01:38:43,626 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 01:38:43,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:38:43,626 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 01:38:43,626 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 01:38:43,626 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 01:38:43,626 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 01:38:43,627 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 01:38:43,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 01:38:43,627 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 01:38:43,627 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 01:38:43,627 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 01:38:43,857 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 01:38:43,881 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 01:38:43,883 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 01:38:43,885 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 01:38:43,885 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 01:38:43,886 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.ufo.BOUNDED-8.pals.c [2023-04-03 01:38:45,006 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 01:38:45,267 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 01:38:45,267 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.ufo.BOUNDED-8.pals.c [2023-04-03 01:38:45,277 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f6a22f1d/474e88800f9f48a8989972d04c23acc0/FLAG5d09cb871 [2023-04-03 01:38:45,291 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f6a22f1d/474e88800f9f48a8989972d04c23acc0 [2023-04-03 01:38:45,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 01:38:45,294 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 01:38:45,297 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 01:38:45,297 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 01:38:45,299 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 01:38:45,300 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:38:45" (1/1) ... [2023-04-03 01:38:45,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61e51d5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:38:45, skipping insertion in model container [2023-04-03 01:38:45,301 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:38:45" (1/1) ... [2023-04-03 01:38:45,307 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 01:38:45,349 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 01:38:45,626 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_floodmax.4.ufo.BOUNDED-8.pals.c[28192,28205] [2023-04-03 01:38:45,629 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:38:45,639 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 01:38:45,728 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_floodmax.4.ufo.BOUNDED-8.pals.c[28192,28205] [2023-04-03 01:38:45,729 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:38:45,743 INFO L208 MainTranslator]: Completed translation [2023-04-03 01:38:45,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:38:45 WrapperNode [2023-04-03 01:38:45,744 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 01:38:45,745 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 01:38:45,745 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 01:38:45,745 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 01:38:45,754 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:38:45" (1/1) ... [2023-04-03 01:38:45,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:38:45" (1/1) ... [2023-04-03 01:38:45,767 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:38:45" (1/1) ... [2023-04-03 01:38:45,768 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:38:45" (1/1) ... [2023-04-03 01:38:45,809 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:38:45" (1/1) ... [2023-04-03 01:38:45,822 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:38:45" (1/1) ... [2023-04-03 01:38:45,825 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:38:45" (1/1) ... [2023-04-03 01:38:45,829 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:38:45" (1/1) ... [2023-04-03 01:38:45,833 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 01:38:45,834 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 01:38:45,834 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 01:38:45,834 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 01:38:45,835 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:38:45" (1/1) ... [2023-04-03 01:38:45,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:38:45,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:38:45,870 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 01:38:45,880 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 01:38:45,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 01:38:45,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 01:38:45,908 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 01:38:45,909 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 01:38:45,909 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-03 01:38:45,909 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-03 01:38:45,909 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-03 01:38:45,910 INFO L138 BoogieDeclarations]: Found implementation of procedure node4 [2023-04-03 01:38:45,910 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-03 01:38:45,910 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-03 01:38:45,910 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 01:38:45,910 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-03 01:38:45,910 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 01:38:45,910 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 01:38:45,910 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 01:38:45,910 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 01:38:45,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 01:38:45,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 01:38:45,911 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 01:38:45,911 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 01:38:45,911 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 01:38:45,911 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 01:38:45,911 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 01:38:45,911 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 01:38:45,911 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 01:38:45,911 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-03 01:38:45,911 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 01:38:45,911 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 01:38:45,911 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 01:38:45,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 01:38:45,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 01:38:45,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 01:38:45,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 01:38:45,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 01:38:45,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 01:38:46,085 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 01:38:46,087 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 01:38:46,897 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 01:38:47,497 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 01:38:47,498 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-03 01:38:47,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:38:47 BoogieIcfgContainer [2023-04-03 01:38:47,501 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 01:38:47,503 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 01:38:47,503 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 01:38:47,506 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 01:38:47,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 01:38:45" (1/3) ... [2023-04-03 01:38:47,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c258bfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:38:47, skipping insertion in model container [2023-04-03 01:38:47,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:38:45" (2/3) ... [2023-04-03 01:38:47,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c258bfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:38:47, skipping insertion in model container [2023-04-03 01:38:47,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:38:47" (3/3) ... [2023-04-03 01:38:47,508 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.ufo.BOUNDED-8.pals.c [2023-04-03 01:38:47,524 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 01:38:47,524 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 01:38:47,577 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 01:38:47,583 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;@757b0f32, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 01:38:47,584 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 01:38:47,589 INFO L276 IsEmpty]: Start isEmpty. Operand has 175 states, 153 states have (on average 1.5620915032679739) internal successors, (239), 154 states have internal predecessors, (239), 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 01:38:47,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-03 01:38:47,602 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:38:47,603 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 01:38:47,604 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:38:47,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:38:47,611 INFO L85 PathProgramCache]: Analyzing trace with hash 2104542807, now seen corresponding path program 1 times [2023-04-03 01:38:47,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:38:47,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703499701] [2023-04-03 01:38:47,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:38:47,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:38:48,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:38:53,364 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 01:38:53,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:38:53,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703499701] [2023-04-03 01:38:53,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703499701] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:38:53,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:38:53,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-03 01:38:53,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150025024] [2023-04-03 01:38:53,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:38:53,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-03 01:38:53,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:38:53,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-03 01:38:53,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2023-04-03 01:38:53,408 INFO L87 Difference]: Start difference. First operand has 175 states, 153 states have (on average 1.5620915032679739) internal successors, (239), 154 states have internal predecessors, (239), 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 01:38:55,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:38:55,540 INFO L93 Difference]: Finished difference Result 282 states and 398 transitions. [2023-04-03 01:38:55,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-03 01:38:55,543 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 01:38:55,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:38:55,552 INFO L225 Difference]: With dead ends: 282 [2023-04-03 01:38:55,553 INFO L226 Difference]: Without dead ends: 228 [2023-04-03 01:38:55,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=320, Invalid=1012, Unknown=0, NotChecked=0, Total=1332 [2023-04-03 01:38:55,559 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1937 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2136 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1940 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 2307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 2136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-03 01:38:55,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1940 Valid, 165 Invalid, 2307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 2136 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-03 01:38:55,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2023-04-03 01:38:55,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 202. [2023-04-03 01:38:55,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 172 states have (on average 1.5465116279069768) internal successors, (266), 173 states have internal predecessors, (266), 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 01:38:55,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 296 transitions. [2023-04-03 01:38:55,637 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 296 transitions. Word has length 85 [2023-04-03 01:38:55,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:38:55,638 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 296 transitions. [2023-04-03 01:38:55,638 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 01:38:55,638 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 296 transitions. [2023-04-03 01:38:55,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-03 01:38:55,643 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:38:55,643 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 01:38:55,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 01:38:55,643 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:38:55,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:38:55,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1205989878, now seen corresponding path program 1 times [2023-04-03 01:38:55,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:38:55,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093794607] [2023-04-03 01:38:55,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:38:55,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:38:55,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:38:58,358 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 01:38:58,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:38:58,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093794607] [2023-04-03 01:38:58,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093794607] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:38:58,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:38:58,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 01:38:58,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074621814] [2023-04-03 01:38:58,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:38:58,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 01:38:58,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:38:58,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 01:38:58,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 01:38:58,366 INFO L87 Difference]: Start difference. First operand 202 states and 296 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 01:38:59,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:38:59,414 INFO L93 Difference]: Finished difference Result 276 states and 388 transitions. [2023-04-03 01:38:59,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 01:38:59,414 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 01:38:59,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:38:59,417 INFO L225 Difference]: With dead ends: 276 [2023-04-03 01:38:59,417 INFO L226 Difference]: Without dead ends: 230 [2023-04-03 01:38:59,417 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 01:38:59,419 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 292 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1774 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-03 01:38:59,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 106 Invalid, 1812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1774 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-03 01:38:59,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2023-04-03 01:38:59,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 202. [2023-04-03 01:38:59,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 172 states have (on average 1.5406976744186047) internal successors, (265), 173 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 01:38:59,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 295 transitions. [2023-04-03 01:38:59,439 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 295 transitions. Word has length 86 [2023-04-03 01:38:59,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:38:59,439 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 295 transitions. [2023-04-03 01:38:59,440 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 01:38:59,440 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 295 transitions. [2023-04-03 01:38:59,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-03 01:38:59,441 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:38:59,441 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 01:38:59,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 01:38:59,442 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:38:59,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:38:59,442 INFO L85 PathProgramCache]: Analyzing trace with hash 227364256, now seen corresponding path program 1 times [2023-04-03 01:38:59,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:38:59,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371200491] [2023-04-03 01:38:59,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:38:59,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:38:59,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:39:01,933 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 01:39:01,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:39:01,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371200491] [2023-04-03 01:39:01,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371200491] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:39:01,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:39:01,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 01:39:01,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475980305] [2023-04-03 01:39:01,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:39:01,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 01:39:01,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:39:01,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 01:39:01,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 01:39:01,937 INFO L87 Difference]: Start difference. First operand 202 states and 295 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 01:39:03,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:39:03,044 INFO L93 Difference]: Finished difference Result 287 states and 401 transitions. [2023-04-03 01:39:03,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 01:39:03,045 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 01:39:03,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:39:03,047 INFO L225 Difference]: With dead ends: 287 [2023-04-03 01:39:03,047 INFO L226 Difference]: Without dead ends: 241 [2023-04-03 01:39:03,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-03 01:39:03,049 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 574 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1796 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-03 01:39:03,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [579 Valid, 100 Invalid, 1844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1796 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-03 01:39:03,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2023-04-03 01:39:03,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 202. [2023-04-03 01:39:03,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 172 states have (on average 1.5348837209302326) internal successors, (264), 173 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 01:39:03,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 293 transitions. [2023-04-03 01:39:03,079 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 293 transitions. Word has length 87 [2023-04-03 01:39:03,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:39:03,081 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 293 transitions. [2023-04-03 01:39:03,082 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 01:39:03,082 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 293 transitions. [2023-04-03 01:39:03,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-03 01:39:03,087 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:39:03,087 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 01:39:03,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 01:39:03,087 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:39:03,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:39:03,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1061452447, now seen corresponding path program 1 times [2023-04-03 01:39:03,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:39:03,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647349778] [2023-04-03 01:39:03,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:39:03,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:39:03,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:39:05,271 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 01:39:05,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:39:05,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647349778] [2023-04-03 01:39:05,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647349778] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:39:05,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:39:05,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 01:39:05,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440634423] [2023-04-03 01:39:05,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:39:05,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 01:39:05,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:39:05,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 01:39:05,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 01:39:05,274 INFO L87 Difference]: Start difference. First operand 202 states and 293 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 01:39:06,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:39:06,404 INFO L93 Difference]: Finished difference Result 281 states and 385 transitions. [2023-04-03 01:39:06,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 01:39:06,405 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 01:39:06,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:39:06,406 INFO L225 Difference]: With dead ends: 281 [2023-04-03 01:39:06,406 INFO L226 Difference]: Without dead ends: 240 [2023-04-03 01:39:06,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-03 01:39:06,408 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 321 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 1830 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-03 01:39:06,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 110 Invalid, 1864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1830 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-03 01:39:06,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-04-03 01:39:06,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 202. [2023-04-03 01:39:06,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 172 states have (on average 1.5290697674418605) internal successors, (263), 173 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 01:39:06,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 292 transitions. [2023-04-03 01:39:06,430 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 292 transitions. Word has length 88 [2023-04-03 01:39:06,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:39:06,430 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 292 transitions. [2023-04-03 01:39:06,431 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 01:39:06,431 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 292 transitions. [2023-04-03 01:39:06,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-04-03 01:39:06,431 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:39:06,432 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 01:39:06,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 01:39:06,432 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:39:06,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:39:06,432 INFO L85 PathProgramCache]: Analyzing trace with hash -2039873303, now seen corresponding path program 1 times [2023-04-03 01:39:06,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:39:06,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229089516] [2023-04-03 01:39:06,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:39:06,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:39:06,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:39:08,444 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 01:39:08,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:39:08,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229089516] [2023-04-03 01:39:08,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229089516] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:39:08,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:39:08,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 01:39:08,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815102576] [2023-04-03 01:39:08,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:39:08,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 01:39:08,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:39:08,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 01:39:08,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 01:39:08,453 INFO L87 Difference]: Start difference. First operand 202 states and 292 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 01:39:09,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:39:09,589 INFO L93 Difference]: Finished difference Result 287 states and 390 transitions. [2023-04-03 01:39:09,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 01:39:09,590 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 01:39:09,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:39:09,591 INFO L225 Difference]: With dead ends: 287 [2023-04-03 01:39:09,591 INFO L226 Difference]: Without dead ends: 246 [2023-04-03 01:39:09,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-03 01:39:09,593 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 584 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1830 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-03 01:39:09,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [593 Valid, 104 Invalid, 1886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1830 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-03 01:39:09,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-04-03 01:39:09,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 202. [2023-04-03 01:39:09,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 172 states have (on average 1.5232558139534884) internal successors, (262), 173 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 01:39:09,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 291 transitions. [2023-04-03 01:39:09,614 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 291 transitions. Word has length 89 [2023-04-03 01:39:09,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:39:09,614 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 291 transitions. [2023-04-03 01:39:09,615 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 01:39:09,615 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 291 transitions. [2023-04-03 01:39:09,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-04-03 01:39:09,615 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:39:09,616 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 01:39:09,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 01:39:09,616 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:39:09,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:39:09,616 INFO L85 PathProgramCache]: Analyzing trace with hash 416826577, now seen corresponding path program 1 times [2023-04-03 01:39:09,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:39:09,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102226163] [2023-04-03 01:39:09,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:39:09,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:39:09,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:39:13,506 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 01:39:13,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:39:13,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102226163] [2023-04-03 01:39:13,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102226163] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:39:13,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:39:13,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-03 01:39:13,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027665453] [2023-04-03 01:39:13,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:39:13,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-03 01:39:13,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:39:13,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-03 01:39:13,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2023-04-03 01:39:13,509 INFO L87 Difference]: Start difference. First operand 202 states and 291 transitions. Second operand has 20 states, 10 states have (on average 7.3) internal successors, (73), 12 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 01:39:15,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:39:15,429 INFO L93 Difference]: Finished difference Result 282 states and 393 transitions. [2023-04-03 01:39:15,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-03 01:39:15,429 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 10 states have (on average 7.3) internal successors, (73), 12 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 01:39:15,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:39:15,431 INFO L225 Difference]: With dead ends: 282 [2023-04-03 01:39:15,431 INFO L226 Difference]: Without dead ends: 238 [2023-04-03 01:39:15,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=320, Invalid=1012, Unknown=0, NotChecked=0, Total=1332 [2023-04-03 01:39:15,432 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1873 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 2410 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1876 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 2562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 2410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-03 01:39:15,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1876 Valid, 150 Invalid, 2562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 2410 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-03 01:39:15,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2023-04-03 01:39:15,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 204. [2023-04-03 01:39:15,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 174 states have (on average 1.5114942528735633) internal successors, (263), 175 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 01:39:15,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 292 transitions. [2023-04-03 01:39:15,463 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 292 transitions. Word has length 91 [2023-04-03 01:39:15,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:39:15,463 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 292 transitions. [2023-04-03 01:39:15,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 10 states have (on average 7.3) internal successors, (73), 12 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 01:39:15,464 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 292 transitions. [2023-04-03 01:39:15,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-04-03 01:39:15,465 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:39:15,465 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 01:39:15,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 01:39:15,465 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:39:15,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:39:15,465 INFO L85 PathProgramCache]: Analyzing trace with hash -644118890, now seen corresponding path program 1 times [2023-04-03 01:39:15,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:39:15,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047753478] [2023-04-03 01:39:15,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:39:15,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:39:15,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:39:16,495 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 01:39:16,496 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:39:16,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047753478] [2023-04-03 01:39:16,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047753478] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:39:16,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:39:16,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 01:39:16,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920488690] [2023-04-03 01:39:16,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:39:16,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 01:39:16,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:39:16,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 01:39:16,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-04-03 01:39:16,498 INFO L87 Difference]: Start difference. First operand 204 states and 292 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 01:39:17,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:39:17,374 INFO L93 Difference]: Finished difference Result 279 states and 386 transitions. [2023-04-03 01:39:17,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 01:39:17,375 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 01:39:17,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:39:17,380 INFO L225 Difference]: With dead ends: 279 [2023-04-03 01:39:17,380 INFO L226 Difference]: Without dead ends: 231 [2023-04-03 01:39:17,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-04-03 01:39:17,384 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 551 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1780 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-03 01:39:17,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [554 Valid, 99 Invalid, 1828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1780 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-03 01:39:17,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2023-04-03 01:39:17,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 204. [2023-04-03 01:39:17,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 174 states have (on average 1.4885057471264367) internal successors, (259), 175 states have internal predecessors, (259), 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 01:39:17,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 288 transitions. [2023-04-03 01:39:17,418 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 288 transitions. Word has length 92 [2023-04-03 01:39:17,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:39:17,418 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 288 transitions. [2023-04-03 01:39:17,418 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 01:39:17,419 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 288 transitions. [2023-04-03 01:39:17,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-03 01:39:17,419 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:39:17,419 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 01:39:17,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 01:39:17,420 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:39:17,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:39:17,420 INFO L85 PathProgramCache]: Analyzing trace with hash 578347644, now seen corresponding path program 1 times [2023-04-03 01:39:17,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:39:17,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444398104] [2023-04-03 01:39:17,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:39:17,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:39:17,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:39:20,364 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 01:39:20,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:39:20,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444398104] [2023-04-03 01:39:20,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444398104] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:39:20,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:39:20,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-03 01:39:20,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056266698] [2023-04-03 01:39:20,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:39:20,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-03 01:39:20,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:39:20,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-03 01:39:20,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2023-04-03 01:39:20,367 INFO L87 Difference]: Start difference. First operand 204 states and 288 transitions. Second operand has 20 states, 10 states have (on average 7.6) internal successors, (76), 12 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 01:39:22,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:39:22,000 INFO L93 Difference]: Finished difference Result 277 states and 374 transitions. [2023-04-03 01:39:22,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-03 01:39:22,001 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 10 states have (on average 7.6) internal successors, (76), 12 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 01:39:22,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:39:22,002 INFO L225 Difference]: With dead ends: 277 [2023-04-03 01:39:22,003 INFO L226 Difference]: Without dead ends: 233 [2023-04-03 01:39:22,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=320, Invalid=1012, Unknown=0, NotChecked=0, Total=1332 [2023-04-03 01:39:22,004 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1284 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2153 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1287 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 2262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-03 01:39:22,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1287 Valid, 161 Invalid, 2262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2153 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-03 01:39:22,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2023-04-03 01:39:22,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 204. [2023-04-03 01:39:22,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 174 states have (on average 1.4827586206896552) internal successors, (258), 175 states have internal predecessors, (258), 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 01:39:22,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 287 transitions. [2023-04-03 01:39:22,032 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 287 transitions. Word has length 94 [2023-04-03 01:39:22,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:39:22,032 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 287 transitions. [2023-04-03 01:39:22,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 10 states have (on average 7.6) internal successors, (76), 12 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 01:39:22,032 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 287 transitions. [2023-04-03 01:39:22,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-04-03 01:39:22,035 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:39:22,035 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 01:39:22,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 01:39:22,035 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:39:22,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:39:22,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1956576838, now seen corresponding path program 1 times [2023-04-03 01:39:22,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:39:22,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544966988] [2023-04-03 01:39:22,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:39:22,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:39:22,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:39:23,461 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 01:39:23,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:39:23,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544966988] [2023-04-03 01:39:23,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544966988] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:39:23,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:39:23,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-04-03 01:39:23,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846077903] [2023-04-03 01:39:23,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:39:23,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-03 01:39:23,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:39:23,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-03 01:39:23,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-04-03 01:39:23,464 INFO L87 Difference]: Start difference. First operand 204 states and 287 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 01:39:23,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:39:23,893 INFO L93 Difference]: Finished difference Result 282 states and 388 transitions. [2023-04-03 01:39:23,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-03 01:39:23,893 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 01:39:23,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:39:23,896 INFO L225 Difference]: With dead ends: 282 [2023-04-03 01:39:23,896 INFO L226 Difference]: Without dead ends: 240 [2023-04-03 01:39:23,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2023-04-03 01:39:23,900 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 40 mSDsluCounter, 2466 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 2696 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 01:39:23,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 2696 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 01:39:23,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-04-03 01:39:23,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 212. [2023-04-03 01:39:23,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 179 states have (on average 1.458100558659218) internal successors, (261), 181 states have internal predecessors, (261), 16 states have call successors, (16), 16 states have call predecessors, (16), 16 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2023-04-03 01:39:23,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 293 transitions. [2023-04-03 01:39:23,949 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 293 transitions. Word has length 95 [2023-04-03 01:39:23,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:39:23,949 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 293 transitions. [2023-04-03 01:39:23,950 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 01:39:23,950 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 293 transitions. [2023-04-03 01:39:23,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-04-03 01:39:23,951 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:39:23,951 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, 1] [2023-04-03 01:39:23,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 01:39:23,951 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:39:23,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:39:23,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1979843270, now seen corresponding path program 1 times [2023-04-03 01:39:23,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:39:23,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177814689] [2023-04-03 01:39:23,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:39:23,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:39:24,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:39:30,154 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 01:39:30,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:39:30,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177814689] [2023-04-03 01:39:30,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177814689] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:39:30,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824410637] [2023-04-03 01:39:30,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:39:30,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:39:30,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:39:30,162 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 01:39:30,173 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 01:39:30,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:39:30,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 1584 conjuncts, 98 conjunts are in the unsatisfiable core [2023-04-03 01:39:30,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:39:49,741 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 01:39:49,741 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 01:39:50,214 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 5599 disjunctions. This might take some time... [2023-04-03 01:39:51,747 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 5599 disjunctions.