/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr.7.ufo.BOUNDED-14.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 01:55:41,082 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 01:55:41,084 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 01:55:41,108 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 01:55:41,109 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 01:55:41,109 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 01:55:41,110 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 01:55:41,111 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 01:55:41,112 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 01:55:41,113 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 01:55:41,113 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 01:55:41,114 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 01:55:41,114 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 01:55:41,115 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 01:55:41,115 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 01:55:41,116 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 01:55:41,116 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 01:55:41,117 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 01:55:41,118 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 01:55:41,119 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 01:55:41,119 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 01:55:41,121 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 01:55:41,122 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 01:55:41,123 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 01:55:41,127 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 01:55:41,127 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 01:55:41,127 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 01:55:41,127 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 01:55:41,128 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 01:55:41,128 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 01:55:41,128 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 01:55:41,129 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 01:55:41,129 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 01:55:41,130 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 01:55:41,130 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 01:55:41,130 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 01:55:41,131 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 01:55:41,131 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 01:55:41,131 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 01:55:41,131 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 01:55:41,132 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 01:55:41,145 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-03 01:55:41,158 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 01:55:41,158 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 01:55:41,158 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 01:55:41,158 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 01:55:41,159 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 01:55:41,159 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 01:55:41,159 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 01:55:41,159 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 01:55:41,159 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 01:55:41,159 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 01:55:41,159 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 01:55:41,159 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 01:55:41,160 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 01:55:41,160 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 01:55:41,160 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 01:55:41,160 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 01:55:41,160 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 01:55:41,160 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 01:55:41,160 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 01:55:41,160 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 01:55:41,161 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 01:55:41,161 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 01:55:41,161 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 01:55:41,161 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 01:55:41,161 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 01:55:41,161 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 01:55:41,161 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 01:55:41,161 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 01:55:41,161 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 01:55:41,162 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 01:55:41,162 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 01:55:41,162 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 01:55:41,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:55:41,162 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 01:55:41,162 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 01:55:41,162 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 01:55:41,162 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 01:55:41,162 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 01:55:41,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 01:55:41,163 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 01:55:41,163 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 01:55:41,163 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 01:55:41,334 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 01:55:41,347 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 01:55:41,349 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 01:55:41,349 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 01:55:41,351 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 01:55:41,352 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.7.ufo.BOUNDED-14.pals.c [2023-04-03 01:55:42,239 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 01:55:42,386 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 01:55:42,387 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.7.ufo.BOUNDED-14.pals.c [2023-04-03 01:55:42,397 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6103bbf90/25f78a48a6614c3784f06c095c59b42f/FLAG6cb7b66d7 [2023-04-03 01:55:42,409 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6103bbf90/25f78a48a6614c3784f06c095c59b42f [2023-04-03 01:55:42,411 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 01:55:42,413 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 01:55:42,415 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 01:55:42,415 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 01:55:42,417 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 01:55:42,418 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:55:42" (1/1) ... [2023-04-03 01:55:42,419 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2882c4a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:55:42, skipping insertion in model container [2023-04-03 01:55:42,419 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:55:42" (1/1) ... [2023-04-03 01:55:42,424 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 01:55:42,461 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 01:55:42,606 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.7.ufo.BOUNDED-14.pals.c[20019,20032] [2023-04-03 01:55:42,609 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:55:42,617 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 01:55:42,687 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.7.ufo.BOUNDED-14.pals.c[20019,20032] [2023-04-03 01:55:42,688 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:55:42,698 INFO L208 MainTranslator]: Completed translation [2023-04-03 01:55:42,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:55:42 WrapperNode [2023-04-03 01:55:42,698 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 01:55:42,699 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 01:55:42,699 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 01:55:42,699 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 01:55:42,715 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:55:42" (1/1) ... [2023-04-03 01:55:42,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:55:42" (1/1) ... [2023-04-03 01:55:42,722 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:55:42" (1/1) ... [2023-04-03 01:55:42,722 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:55:42" (1/1) ... [2023-04-03 01:55:42,735 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:55:42" (1/1) ... [2023-04-03 01:55:42,740 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:55:42" (1/1) ... [2023-04-03 01:55:42,742 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:55:42" (1/1) ... [2023-04-03 01:55:42,744 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:55:42" (1/1) ... [2023-04-03 01:55:42,749 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 01:55:42,750 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 01:55:42,750 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 01:55:42,750 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 01:55:42,751 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:55:42" (1/1) ... [2023-04-03 01:55:42,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:55:42,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:55:42,782 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-03 01:55:42,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-03 01:55:42,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 01:55:42,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 01:55:42,816 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 01:55:42,819 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 01:55:42,822 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-03 01:55:42,822 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-03 01:55:42,822 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-03 01:55:42,822 INFO L138 BoogieDeclarations]: Found implementation of procedure node4 [2023-04-03 01:55:42,822 INFO L138 BoogieDeclarations]: Found implementation of procedure node5 [2023-04-03 01:55:42,822 INFO L138 BoogieDeclarations]: Found implementation of procedure node6 [2023-04-03 01:55:42,822 INFO L138 BoogieDeclarations]: Found implementation of procedure node7 [2023-04-03 01:55:42,822 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-03 01:55:42,822 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-03 01:55:42,822 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 01:55:42,822 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-03 01:55:42,823 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 01:55:42,823 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 01:55:42,823 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 01:55:42,823 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 01:55:42,823 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 01:55:42,823 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 01:55:42,823 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 01:55:42,823 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 01:55:42,823 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 01:55:42,823 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 01:55:42,823 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 01:55:42,823 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 01:55:42,823 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 01:55:42,823 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-03 01:55:42,823 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-03 01:55:42,824 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2023-04-03 01:55:42,824 INFO L130 BoogieDeclarations]: Found specification of procedure node7 [2023-04-03 01:55:42,824 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 01:55:42,824 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 01:55:42,824 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 01:55:42,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 01:55:42,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 01:55:42,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 01:55:42,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 01:55:42,824 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 01:55:42,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 01:55:42,937 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 01:55:42,938 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 01:55:43,389 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 01:55:43,806 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 01:55:43,807 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-03 01:55:43,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:55:43 BoogieIcfgContainer [2023-04-03 01:55:43,810 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 01:55:43,812 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 01:55:43,812 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 01:55:43,814 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 01:55:43,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 01:55:42" (1/3) ... [2023-04-03 01:55:43,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12415d86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:55:43, skipping insertion in model container [2023-04-03 01:55:43,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:55:42" (2/3) ... [2023-04-03 01:55:43,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12415d86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:55:43, skipping insertion in model container [2023-04-03 01:55:43,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:55:43" (3/3) ... [2023-04-03 01:55:43,818 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.ufo.BOUNDED-14.pals.c [2023-04-03 01:55:43,830 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 01:55:43,830 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 01:55:43,882 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 01:55:43,887 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;@4ac08e39, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 01:55:43,887 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 01:55:43,891 INFO L276 IsEmpty]: Start isEmpty. Operand has 56 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 29 states have internal predecessors, (34), 13 states have call successors, (13), 13 states have call predecessors, (13), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-04-03 01:55:43,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-03 01:55:43,896 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:55:43,897 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] [2023-04-03 01:55:43,898 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:55:43,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:55:43,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1382655744, now seen corresponding path program 1 times [2023-04-03 01:55:43,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:55:43,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870169937] [2023-04-03 01:55:43,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:55:43,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:55:44,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:55:47,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:55:47,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:55:47,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870169937] [2023-04-03 01:55:47,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870169937] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:55:47,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:55:47,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2023-04-03 01:55:47,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080131209] [2023-04-03 01:55:47,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:55:47,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-04-03 01:55:47,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:55:47,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-04-03 01:55:47,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2023-04-03 01:55:47,740 INFO L87 Difference]: Start difference. First operand has 56 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 29 states have internal predecessors, (34), 13 states have call successors, (13), 13 states have call predecessors, (13), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 31 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 12 states have call successors, (13), 10 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-03 01:55:49,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:55:49,235 INFO L93 Difference]: Finished difference Result 183 states and 205 transitions. [2023-04-03 01:55:49,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-04-03 01:55:49,237 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 12 states have call successors, (13), 10 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 46 [2023-04-03 01:55:49,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:55:49,243 INFO L225 Difference]: With dead ends: 183 [2023-04-03 01:55:49,244 INFO L226 Difference]: Without dead ends: 125 [2023-04-03 01:55:49,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=597, Invalid=2483, Unknown=0, NotChecked=0, Total=3080 [2023-04-03 01:55:49,249 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 760 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 460 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 771 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 460 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-03 01:55:49,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [771 Valid, 181 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [460 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-03 01:55:49,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-04-03 01:55:49,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 84. [2023-04-03 01:55:49,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 43 states have internal predecessors, (48), 21 states have call successors, (21), 21 states have call predecessors, (21), 20 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-04-03 01:55:49,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2023-04-03 01:55:49,381 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 46 [2023-04-03 01:55:49,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:55:49,382 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2023-04-03 01:55:49,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 12 states have call successors, (13), 10 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-03 01:55:49,382 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2023-04-03 01:55:49,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-03 01:55:49,384 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:55:49,384 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] [2023-04-03 01:55:49,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 01:55:49,384 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:55:49,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:55:49,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1664145471, now seen corresponding path program 1 times [2023-04-03 01:55:49,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:55:49,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057677405] [2023-04-03 01:55:49,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:55:49,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:55:49,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:55:49,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:55:49,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:55:49,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057677405] [2023-04-03 01:55:49,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057677405] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:55:49,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:55:49,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 01:55:49,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865791797] [2023-04-03 01:55:49,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:55:49,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 01:55:49,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:55:49,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 01:55:49,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-04-03 01:55:49,763 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand has 11 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-04-03 01:55:50,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:55:50,065 INFO L93 Difference]: Finished difference Result 154 states and 164 transitions. [2023-04-03 01:55:50,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 01:55:50,065 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 48 [2023-04-03 01:55:50,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:55:50,068 INFO L225 Difference]: With dead ends: 154 [2023-04-03 01:55:50,068 INFO L226 Difference]: Without dead ends: 111 [2023-04-03 01:55:50,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-04-03 01:55:50,073 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 125 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 01:55:50,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 117 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 01:55:50,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-04-03 01:55:50,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 84. [2023-04-03 01:55:50,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 42 states have (on average 1.119047619047619) internal successors, (47), 43 states have internal predecessors, (47), 21 states have call successors, (21), 21 states have call predecessors, (21), 20 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-04-03 01:55:50,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2023-04-03 01:55:50,093 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 48 [2023-04-03 01:55:50,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:55:50,094 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2023-04-03 01:55:50,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-04-03 01:55:50,094 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2023-04-03 01:55:50,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-03 01:55:50,095 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:55:50,095 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] [2023-04-03 01:55:50,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 01:55:50,095 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:55:50,095 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:55:50,095 INFO L85 PathProgramCache]: Analyzing trace with hash -461762904, now seen corresponding path program 1 times [2023-04-03 01:55:50,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:55:50,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900145483] [2023-04-03 01:55:50,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:55:50,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:55:50,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:55:52,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:55:52,744 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:55:52,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900145483] [2023-04-03 01:55:52,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900145483] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:55:52,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:55:52,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2023-04-03 01:55:52,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850640642] [2023-04-03 01:55:52,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:55:52,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-04-03 01:55:52,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:55:52,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-04-03 01:55:52,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2023-04-03 01:55:52,748 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 31 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 12 states have call successors, (13), 10 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-03 01:55:54,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:55:54,467 INFO L93 Difference]: Finished difference Result 167 states and 177 transitions. [2023-04-03 01:55:54,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-04-03 01:55:54,468 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 12 states have call successors, (13), 10 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 48 [2023-04-03 01:55:54,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:55:54,471 INFO L225 Difference]: With dead ends: 167 [2023-04-03 01:55:54,471 INFO L226 Difference]: Without dead ends: 125 [2023-04-03 01:55:54,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=631, Invalid=2561, Unknown=0, NotChecked=0, Total=3192 [2023-04-03 01:55:54,475 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 621 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 1100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-03 01:55:54,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [632 Valid, 167 Invalid, 1100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-03 01:55:54,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-04-03 01:55:54,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 84. [2023-04-03 01:55:54,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 43 states have internal predecessors, (46), 21 states have call successors, (21), 21 states have call predecessors, (21), 20 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-04-03 01:55:54,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2023-04-03 01:55:54,491 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 48 [2023-04-03 01:55:54,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:55:54,491 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2023-04-03 01:55:54,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 12 states have call successors, (13), 10 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-03 01:55:54,492 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2023-04-03 01:55:54,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-03 01:55:54,492 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:55:54,492 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] [2023-04-03 01:55:54,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 01:55:54,493 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:55:54,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:55:54,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1201542763, now seen corresponding path program 1 times [2023-04-03 01:55:54,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:55:54,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104117133] [2023-04-03 01:55:54,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:55:54,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:55:54,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:55:55,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:55:55,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:55:55,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104117133] [2023-04-03 01:55:55,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104117133] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:55:55,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:55:55,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-04-03 01:55:55,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52995848] [2023-04-03 01:55:55,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:55:55,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-03 01:55:55,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:55:55,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-03 01:55:55,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-04-03 01:55:55,578 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand has 13 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2023-04-03 01:55:55,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:55:55,810 INFO L93 Difference]: Finished difference Result 126 states and 141 transitions. [2023-04-03 01:55:55,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-03 01:55:55,810 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 49 [2023-04-03 01:55:55,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:55:55,811 INFO L225 Difference]: With dead ends: 126 [2023-04-03 01:55:55,811 INFO L226 Difference]: Without dead ends: 124 [2023-04-03 01:55:55,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2023-04-03 01:55:55,813 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 39 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:55:55,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 660 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:55:55,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-04-03 01:55:55,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 93. [2023-04-03 01:55:55,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 50 states have internal predecessors, (52), 22 states have call successors, (22), 22 states have call predecessors, (22), 22 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2023-04-03 01:55:55,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2023-04-03 01:55:55,836 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 49 [2023-04-03 01:55:55,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:55:55,836 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2023-04-03 01:55:55,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2023-04-03 01:55:55,840 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2023-04-03 01:55:55,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-04-03 01:55:55,841 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:55:55,841 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-03 01:55:55,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 01:55:55,841 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:55:55,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:55:55,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1844036340, now seen corresponding path program 1 times [2023-04-03 01:55:55,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:55:55,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283072436] [2023-04-03 01:55:55,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:55:55,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:55:56,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:56:13,954 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 01:56:13,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:56:13,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283072436] [2023-04-03 01:56:13,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283072436] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:56:13,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793860542] [2023-04-03 01:56:13,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:56:13,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:56:13,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:56:13,963 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:56:13,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 01:56:14,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:56:14,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 276 conjunts are in the unsatisfiable core [2023-04-03 01:56:14,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:57:10,923 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-04-03 01:57:40,519 WARN L223 SmtUtils]: Spent 28.99s on a formula simplification. DAG size of input: 235 DAG size of output: 192 (called from [L 183] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminateOne) [2023-04-03 01:58:15,767 WARN L223 SmtUtils]: Spent 12.07s on a formula simplification that was a NOOP. DAG size: 282 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)