/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:50:23,747 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:50:23,749 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:50:23,775 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:50:23,779 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:50:23,781 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:50:23,782 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:50:23,783 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:50:23,784 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:50:23,784 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:50:23,785 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:50:23,785 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:50:23,786 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:50:23,786 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:50:23,787 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:50:23,788 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:50:23,788 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:50:23,789 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:50:23,790 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:50:23,791 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:50:23,792 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:50:23,800 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:50:23,802 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:50:23,804 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:50:23,812 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 02:50:23,812 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 02:50:23,813 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 02:50:23,813 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 02:50:23,814 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 02:50:23,814 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 02:50:23,814 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 02:50:23,815 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 02:50:23,815 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 02:50:23,815 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 02:50:23,816 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 02:50:23,816 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 02:50:23,816 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 02:50:23,817 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 02:50:23,817 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:50:23,817 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:50:23,818 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:50:23,821 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-03 02:50:23,849 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:50:23,850 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:50:23,850 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:50:23,850 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:50:23,851 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:50:23,851 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:50:23,851 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:50:23,851 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:50:23,851 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:50:23,851 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:50:23,852 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:50:23,852 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:50:23,852 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:50:23,852 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:50:23,852 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:50:23,853 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:50:23,853 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:50:23,853 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:50:23,853 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:50:23,853 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:50:23,853 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:50:23,853 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:50:23,853 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:50:23,854 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:50:23,854 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:50:23,854 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:50:23,854 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:50:23,854 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:50:23,854 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:50:23,854 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:50:23,854 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:50:23,854 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:50:23,854 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:50:23,855 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:50:23,855 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:50:23,855 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:50:23,855 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:50:23,855 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:50:23,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:50:23,855 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:50:23,855 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:50:23,855 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:50:24,064 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:50:24,082 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:50:24,083 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:50:24,084 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:50:24,085 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:50:24,085 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2023-04-03 02:50:25,089 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:50:25,243 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:50:25,244 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2023-04-03 02:50:25,258 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97690e5be/79a20eb6c766454fa48314c8548e1ba7/FLAG386c6b7ed [2023-04-03 02:50:25,268 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97690e5be/79a20eb6c766454fa48314c8548e1ba7 [2023-04-03 02:50:25,270 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:50:25,270 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:50:25,272 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:50:25,273 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:50:25,275 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:50:25,275 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:50:25" (1/1) ... [2023-04-03 02:50:25,276 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@362fcb35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:50:25, skipping insertion in model container [2023-04-03 02:50:25,276 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:50:25" (1/1) ... [2023-04-03 02:50:25,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:50:25,312 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:50:25,456 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c[7365,7378] [2023-04-03 02:50:25,481 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:50:25,493 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:50:25,525 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c[7365,7378] [2023-04-03 02:50:25,544 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:50:25,558 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:50:25,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:50:25 WrapperNode [2023-04-03 02:50:25,559 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:50:25,559 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:50:25,561 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:50:25,561 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:50:25,568 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:50:25" (1/1) ... [2023-04-03 02:50:25,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:50:25" (1/1) ... [2023-04-03 02:50:25,578 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:50:25" (1/1) ... [2023-04-03 02:50:25,578 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:50:25" (1/1) ... [2023-04-03 02:50:25,587 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:50:25" (1/1) ... [2023-04-03 02:50:25,593 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:50:25" (1/1) ... [2023-04-03 02:50:25,595 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:50:25" (1/1) ... [2023-04-03 02:50:25,596 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:50:25" (1/1) ... [2023-04-03 02:50:25,599 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:50:25,600 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:50:25,600 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:50:25,600 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:50:25,601 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:50:25" (1/1) ... [2023-04-03 02:50:25,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:50:25,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:50:25,635 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-03 02:50:25,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-03 02:50:25,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:50:25,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:50:25,660 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:50:25,660 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:50:25,660 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:50:25,660 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:50:25,661 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:50:25,661 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:50:25,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:50:25,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:50:25,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:50:25,661 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:50:25,661 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:50:25,661 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:50:25,661 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:50:25,661 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:50:25,661 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:50:25,661 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:50:25,661 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-03 02:50:25,661 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-03 02:50:25,662 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2023-04-03 02:50:25,662 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:50:25,662 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:50:25,662 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:50:25,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:50:25,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:50:25,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:50:25,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:50:25,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:50:25,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:50:25,783 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:50:25,785 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:50:26,291 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:50:26,400 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:50:26,400 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 02:50:26,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:50:26 BoogieIcfgContainer [2023-04-03 02:50:26,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:50:26,405 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:50:26,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:50:26,408 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:50:26,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:50:25" (1/3) ... [2023-04-03 02:50:26,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cda3eb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:50:26, skipping insertion in model container [2023-04-03 02:50:26,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:50:25" (2/3) ... [2023-04-03 02:50:26,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cda3eb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:50:26, skipping insertion in model container [2023-04-03 02:50:26,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:50:26" (3/3) ... [2023-04-03 02:50:26,411 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2023-04-03 02:50:26,424 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:50:26,424 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 02:50:26,462 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:50:26,467 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;@19579c5a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:50:26,467 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 02:50:26,470 INFO L276 IsEmpty]: Start isEmpty. Operand has 133 states, 127 states have (on average 1.68503937007874) internal successors, (214), 128 states have internal predecessors, (214), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-03 02:50:26,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-03 02:50:26,504 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:50:26,505 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:50:26,505 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:50:26,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:50:26,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1351172971, now seen corresponding path program 1 times [2023-04-03 02:50:26,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:50:26,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421215044] [2023-04-03 02:50:26,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:50:26,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:50:26,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:50:26,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:50:26,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:50:26,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421215044] [2023-04-03 02:50:26,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421215044] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:50:26,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:50:26,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:50:26,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966541425] [2023-04-03 02:50:26,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:50:26,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:50:26,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:50:26,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:50:26,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:50:26,947 INFO L87 Difference]: Start difference. First operand has 133 states, 127 states have (on average 1.68503937007874) internal successors, (214), 128 states have internal predecessors, (214), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:27,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:50:27,062 INFO L93 Difference]: Finished difference Result 294 states and 459 transitions. [2023-04-03 02:50:27,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:50:27,064 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2023-04-03 02:50:27,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:50:27,071 INFO L225 Difference]: With dead ends: 294 [2023-04-03 02:50:27,072 INFO L226 Difference]: Without dead ends: 200 [2023-04-03 02:50:27,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:50:27,077 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 163 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:50:27,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 423 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:50:27,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-04-03 02:50:27,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 198. [2023-04-03 02:50:27,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 194 states have (on average 1.407216494845361) internal successors, (273), 194 states have internal predecessors, (273), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:27,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 276 transitions. [2023-04-03 02:50:27,131 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 276 transitions. Word has length 62 [2023-04-03 02:50:27,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:50:27,132 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 276 transitions. [2023-04-03 02:50:27,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:27,132 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 276 transitions. [2023-04-03 02:50:27,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-03 02:50:27,141 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:50:27,141 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:50:27,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:50:27,142 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:50:27,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:50:27,142 INFO L85 PathProgramCache]: Analyzing trace with hash 857012060, now seen corresponding path program 1 times [2023-04-03 02:50:27,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:50:27,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914544599] [2023-04-03 02:50:27,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:50:27,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:50:27,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:50:27,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:50:27,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:50:27,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914544599] [2023-04-03 02:50:27,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914544599] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:50:27,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:50:27,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:50:27,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044926370] [2023-04-03 02:50:27,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:50:27,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:50:27,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:50:27,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:50:27,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:50:27,295 INFO L87 Difference]: Start difference. First operand 198 states and 276 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:27,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:50:27,376 INFO L93 Difference]: Finished difference Result 478 states and 700 transitions. [2023-04-03 02:50:27,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:50:27,378 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2023-04-03 02:50:27,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:50:27,386 INFO L225 Difference]: With dead ends: 478 [2023-04-03 02:50:27,386 INFO L226 Difference]: Without dead ends: 327 [2023-04-03 02:50:27,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:50:27,392 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 118 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:50:27,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 350 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:50:27,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2023-04-03 02:50:27,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 325. [2023-04-03 02:50:27,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 321 states have (on average 1.4485981308411215) internal successors, (465), 321 states have internal predecessors, (465), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:27,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 468 transitions. [2023-04-03 02:50:27,426 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 468 transitions. Word has length 65 [2023-04-03 02:50:27,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:50:27,426 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 468 transitions. [2023-04-03 02:50:27,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:27,426 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 468 transitions. [2023-04-03 02:50:27,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-03 02:50:27,430 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:50:27,430 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] [2023-04-03 02:50:27,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:50:27,430 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:50:27,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:50:27,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1609121423, now seen corresponding path program 1 times [2023-04-03 02:50:27,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:50:27,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649629591] [2023-04-03 02:50:27,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:50:27,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:50:27,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:50:27,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:50:27,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:50:27,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649629591] [2023-04-03 02:50:27,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649629591] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:50:27,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:50:27,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:50:27,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019185853] [2023-04-03 02:50:27,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:50:27,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:50:27,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:50:27,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:50:27,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:50:27,571 INFO L87 Difference]: Start difference. First operand 325 states and 468 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:27,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:50:27,654 INFO L93 Difference]: Finished difference Result 837 states and 1242 transitions. [2023-04-03 02:50:27,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:50:27,655 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2023-04-03 02:50:27,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:50:27,659 INFO L225 Difference]: With dead ends: 837 [2023-04-03 02:50:27,659 INFO L226 Difference]: Without dead ends: 559 [2023-04-03 02:50:27,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:50:27,667 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 113 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:50:27,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 335 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:50:27,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2023-04-03 02:50:27,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 557. [2023-04-03 02:50:27,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 553 states have (on average 1.4701627486437614) internal successors, (813), 553 states have internal predecessors, (813), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:27,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 816 transitions. [2023-04-03 02:50:27,724 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 816 transitions. Word has length 68 [2023-04-03 02:50:27,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:50:27,725 INFO L495 AbstractCegarLoop]: Abstraction has 557 states and 816 transitions. [2023-04-03 02:50:27,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:27,725 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 816 transitions. [2023-04-03 02:50:27,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-04-03 02:50:27,726 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:50:27,726 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] [2023-04-03 02:50:27,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:50:27,727 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:50:27,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:50:27,729 INFO L85 PathProgramCache]: Analyzing trace with hash -468011927, now seen corresponding path program 1 times [2023-04-03 02:50:27,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:50:27,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090265056] [2023-04-03 02:50:27,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:50:27,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:50:27,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:50:27,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:50:27,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:50:27,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090265056] [2023-04-03 02:50:27,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090265056] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:50:27,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:50:27,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:50:27,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100154076] [2023-04-03 02:50:27,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:50:27,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:50:27,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:50:27,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:50:27,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:50:27,823 INFO L87 Difference]: Start difference. First operand 557 states and 816 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:27,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:50:27,948 INFO L93 Difference]: Finished difference Result 1489 states and 2218 transitions. [2023-04-03 02:50:27,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:50:27,950 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2023-04-03 02:50:27,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:50:27,956 INFO L225 Difference]: With dead ends: 1489 [2023-04-03 02:50:27,957 INFO L226 Difference]: Without dead ends: 979 [2023-04-03 02:50:27,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:50:27,962 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 108 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:50:27,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 320 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:50:27,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2023-04-03 02:50:28,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 977. [2023-04-03 02:50:28,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 973 states have (on average 1.4768756423432683) internal successors, (1437), 973 states have internal predecessors, (1437), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:28,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 1440 transitions. [2023-04-03 02:50:28,041 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 1440 transitions. Word has length 71 [2023-04-03 02:50:28,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:50:28,042 INFO L495 AbstractCegarLoop]: Abstraction has 977 states and 1440 transitions. [2023-04-03 02:50:28,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:28,042 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 1440 transitions. [2023-04-03 02:50:28,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-03 02:50:28,042 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:50:28,043 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] [2023-04-03 02:50:28,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:50:28,043 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:50:28,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:50:28,043 INFO L85 PathProgramCache]: Analyzing trace with hash 415900427, now seen corresponding path program 1 times [2023-04-03 02:50:28,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:50:28,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048000188] [2023-04-03 02:50:28,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:50:28,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:50:28,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:50:28,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:50:28,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:50:28,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048000188] [2023-04-03 02:50:28,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048000188] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:50:28,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:50:28,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:50:28,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143104044] [2023-04-03 02:50:28,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:50:28,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:50:28,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:50:28,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:50:28,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:50:28,121 INFO L87 Difference]: Start difference. First operand 977 states and 1440 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:28,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:50:28,308 INFO L93 Difference]: Finished difference Result 2661 states and 3954 transitions. [2023-04-03 02:50:28,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:50:28,309 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2023-04-03 02:50:28,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:50:28,314 INFO L225 Difference]: With dead ends: 2661 [2023-04-03 02:50:28,315 INFO L226 Difference]: Without dead ends: 1731 [2023-04-03 02:50:28,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:50:28,317 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 103 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:50:28,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 305 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:50:28,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2023-04-03 02:50:28,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 1729. [2023-04-03 02:50:28,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1729 states, 1725 states have (on average 1.4730434782608695) internal successors, (2541), 1725 states have internal predecessors, (2541), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:28,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1729 states to 1729 states and 2544 transitions. [2023-04-03 02:50:28,465 INFO L78 Accepts]: Start accepts. Automaton has 1729 states and 2544 transitions. Word has length 74 [2023-04-03 02:50:28,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:50:28,466 INFO L495 AbstractCegarLoop]: Abstraction has 1729 states and 2544 transitions. [2023-04-03 02:50:28,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:28,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1729 states and 2544 transitions. [2023-04-03 02:50:28,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-03 02:50:28,466 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:50:28,467 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] [2023-04-03 02:50:28,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:50:28,467 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:50:28,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:50:28,467 INFO L85 PathProgramCache]: Analyzing trace with hash 358876310, now seen corresponding path program 1 times [2023-04-03 02:50:28,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:50:28,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679895457] [2023-04-03 02:50:28,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:50:28,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:50:28,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:50:28,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:50:28,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:50:28,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679895457] [2023-04-03 02:50:28,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679895457] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:50:28,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:50:28,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:50:28,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787118132] [2023-04-03 02:50:28,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:50:28,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:50:28,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:50:28,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:50:28,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:50:28,573 INFO L87 Difference]: Start difference. First operand 1729 states and 2544 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:28,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:50:28,876 INFO L93 Difference]: Finished difference Result 4741 states and 6994 transitions. [2023-04-03 02:50:28,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:50:28,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2023-04-03 02:50:28,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:50:28,886 INFO L225 Difference]: With dead ends: 4741 [2023-04-03 02:50:28,886 INFO L226 Difference]: Without dead ends: 3059 [2023-04-03 02:50:28,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:50:28,889 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 98 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:50:28,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 290 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:50:28,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3059 states. [2023-04-03 02:50:29,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3059 to 3057. [2023-04-03 02:50:29,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3057 states, 3053 states have (on average 1.4611857189649524) internal successors, (4461), 3053 states have internal predecessors, (4461), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:29,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3057 states to 3057 states and 4464 transitions. [2023-04-03 02:50:29,142 INFO L78 Accepts]: Start accepts. Automaton has 3057 states and 4464 transitions. Word has length 77 [2023-04-03 02:50:29,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:50:29,142 INFO L495 AbstractCegarLoop]: Abstraction has 3057 states and 4464 transitions. [2023-04-03 02:50:29,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:29,142 INFO L276 IsEmpty]: Start isEmpty. Operand 3057 states and 4464 transitions. [2023-04-03 02:50:29,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-03 02:50:29,146 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:50:29,146 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] [2023-04-03 02:50:29,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:50:29,147 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:50:29,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:50:29,147 INFO L85 PathProgramCache]: Analyzing trace with hash 22850567, now seen corresponding path program 1 times [2023-04-03 02:50:29,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:50:29,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42058266] [2023-04-03 02:50:29,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:50:29,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:50:29,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:50:29,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:50:29,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:50:29,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42058266] [2023-04-03 02:50:29,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42058266] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:50:29,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:50:29,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-03 02:50:29,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131616852] [2023-04-03 02:50:29,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:50:29,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-03 02:50:29,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:50:29,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-03 02:50:29,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-04-03 02:50:29,368 INFO L87 Difference]: Start difference. First operand 3057 states and 4464 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:31,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:50:31,201 INFO L93 Difference]: Finished difference Result 18237 states and 26550 transitions. [2023-04-03 02:50:31,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-03 02:50:31,202 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2023-04-03 02:50:31,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:50:31,249 INFO L225 Difference]: With dead ends: 18237 [2023-04-03 02:50:31,249 INFO L226 Difference]: Without dead ends: 15227 [2023-04-03 02:50:31,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-04-03 02:50:31,259 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 712 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 1058 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:50:31,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [712 Valid, 1058 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:50:31,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15227 states. [2023-04-03 02:50:33,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15227 to 15217. [2023-04-03 02:50:33,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15217 states, 15213 states have (on average 1.4522447906395846) internal successors, (22093), 15213 states have internal predecessors, (22093), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:33,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15217 states to 15217 states and 22096 transitions. [2023-04-03 02:50:33,196 INFO L78 Accepts]: Start accepts. Automaton has 15217 states and 22096 transitions. Word has length 80 [2023-04-03 02:50:33,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:50:33,196 INFO L495 AbstractCegarLoop]: Abstraction has 15217 states and 22096 transitions. [2023-04-03 02:50:33,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:33,197 INFO L276 IsEmpty]: Start isEmpty. Operand 15217 states and 22096 transitions. [2023-04-03 02:50:33,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-04-03 02:50:33,198 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:50:33,198 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] [2023-04-03 02:50:33,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:50:33,198 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:50:33,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:50:33,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1953117392, now seen corresponding path program 1 times [2023-04-03 02:50:33,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:50:33,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374530590] [2023-04-03 02:50:33,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:50:33,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:50:33,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:50:33,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:50:33,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:50:33,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374530590] [2023-04-03 02:50:33,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374530590] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:50:33,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:50:33,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:50:33,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9560149] [2023-04-03 02:50:33,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:50:33,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:50:33,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:50:33,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:50:33,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:50:33,320 INFO L87 Difference]: Start difference. First operand 15217 states and 22096 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:36,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:50:36,476 INFO L93 Difference]: Finished difference Result 38951 states and 56772 transitions. [2023-04-03 02:50:36,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:50:36,477 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2023-04-03 02:50:36,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:50:36,541 INFO L225 Difference]: With dead ends: 38951 [2023-04-03 02:50:36,541 INFO L226 Difference]: Without dead ends: 23781 [2023-04-03 02:50:36,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:50:36,569 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 678 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:50:36,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [678 Valid, 170 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:50:36,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23781 states. [2023-04-03 02:50:39,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23781 to 23779. [2023-04-03 02:50:39,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23779 states, 23775 states have (on average 1.445509989484753) internal successors, (34367), 23775 states have internal predecessors, (34367), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:39,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23779 states to 23779 states and 34370 transitions. [2023-04-03 02:50:39,796 INFO L78 Accepts]: Start accepts. Automaton has 23779 states and 34370 transitions. Word has length 82 [2023-04-03 02:50:39,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:50:39,796 INFO L495 AbstractCegarLoop]: Abstraction has 23779 states and 34370 transitions. [2023-04-03 02:50:39,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:39,796 INFO L276 IsEmpty]: Start isEmpty. Operand 23779 states and 34370 transitions. [2023-04-03 02:50:39,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-04-03 02:50:39,797 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:50:39,797 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] [2023-04-03 02:50:39,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:50:39,797 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:50:39,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:50:39,798 INFO L85 PathProgramCache]: Analyzing trace with hash -103003435, now seen corresponding path program 1 times [2023-04-03 02:50:39,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:50:39,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390129237] [2023-04-03 02:50:39,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:50:39,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:50:39,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:50:40,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:50:40,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:50:40,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390129237] [2023-04-03 02:50:40,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390129237] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:50:40,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:50:40,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:50:40,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089699712] [2023-04-03 02:50:40,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:50:40,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:50:40,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:50:40,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:50:40,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:50:40,162 INFO L87 Difference]: Start difference. First operand 23779 states and 34370 transitions. Second operand has 11 states, 11 states have (on average 7.181818181818182) internal successors, (79), 11 states have internal predecessors, (79), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:45,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:50:45,799 INFO L93 Difference]: Finished difference Result 44768 states and 64941 transitions. [2023-04-03 02:50:45,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-03 02:50:45,799 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.181818181818182) internal successors, (79), 11 states have internal predecessors, (79), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2023-04-03 02:50:45,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:50:45,887 INFO L225 Difference]: With dead ends: 44768 [2023-04-03 02:50:45,887 INFO L226 Difference]: Without dead ends: 44766 [2023-04-03 02:50:45,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2023-04-03 02:50:45,902 INFO L413 NwaCegarLoop]: 568 mSDtfsCounter, 1919 mSDsluCounter, 2638 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1919 SdHoareTripleChecker+Valid, 3206 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:50:45,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1919 Valid, 3206 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:50:45,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44766 states. [2023-04-03 02:50:49,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44766 to 24339. [2023-04-03 02:50:49,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24339 states, 24335 states have (on average 1.4459420587630984) internal successors, (35187), 24335 states have internal predecessors, (35187), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:49,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24339 states to 24339 states and 35190 transitions. [2023-04-03 02:50:49,301 INFO L78 Accepts]: Start accepts. Automaton has 24339 states and 35190 transitions. Word has length 82 [2023-04-03 02:50:49,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:50:49,302 INFO L495 AbstractCegarLoop]: Abstraction has 24339 states and 35190 transitions. [2023-04-03 02:50:49,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.181818181818182) internal successors, (79), 11 states have internal predecessors, (79), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:49,302 INFO L276 IsEmpty]: Start isEmpty. Operand 24339 states and 35190 transitions. [2023-04-03 02:50:49,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-04-03 02:50:49,305 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:50:49,305 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:50:49,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 02:50:49,305 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:50:49,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:50:49,305 INFO L85 PathProgramCache]: Analyzing trace with hash -332998009, now seen corresponding path program 1 times [2023-04-03 02:50:49,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:50:49,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536674295] [2023-04-03 02:50:49,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:50:49,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:50:49,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:50:50,863 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:50:50,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:50:50,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536674295] [2023-04-03 02:50:50,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536674295] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:50:50,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144763580] [2023-04-03 02:50:50,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:50:50,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:50:50,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:50:50,867 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:50:50,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 02:50:51,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:50:51,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 77 conjunts are in the unsatisfiable core [2023-04-03 02:50:51,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:50:53,573 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:50:53,574 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:52:05,040 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:52:05,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144763580] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 02:52:05,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1109158642] [2023-04-03 02:52:05,063 INFO L159 IcfgInterpreter]: Started Sifa with 83 locations of interest [2023-04-03 02:52:05,063 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 02:52:05,067 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 02:52:05,070 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 02:52:05,071 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 02:52:05,932 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 210 for LOIs [2023-04-03 02:52:50,258 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 17 [2023-04-03 02:52:58,606 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 131072 conjuctions. This might take some time...