/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 EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem12_label00.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:02:10,693 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:02:10,695 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:02:10,726 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:02:10,726 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:02:10,728 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:02:10,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:02:10,735 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:02:10,736 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:02:10,740 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:02:10,741 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:02:10,742 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:02:10,742 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:02:10,744 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:02:10,745 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:02:10,745 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:02:10,746 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:02:10,746 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:02:10,748 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:02:10,752 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:02:10,753 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:02:10,753 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:02:10,754 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:02:10,755 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:02:10,760 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:02:10,760 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:02:10,760 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:02:10,761 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:02:10,761 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:02:10,762 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:02:10,762 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:02:10,763 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:02:10,763 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:02:10,763 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:02:10,764 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:02:10,764 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:02:10,764 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:02:10,764 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:02:10,765 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:02:10,765 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:02:10,765 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:02:10,766 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 [2023-04-01 10:02:10,778 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:02:10,778 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:02:10,778 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:02:10,778 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:02:10,779 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:02:10,779 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:02:10,779 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:02:10,779 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:02:10,779 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:02:10,779 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:02:10,779 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:02:10,779 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:02:10,779 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:02:10,780 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:02:10,780 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:02:10,780 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:02:10,780 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:02:10,780 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:02:10,780 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:02:10,780 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:02:10,781 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:02:10,781 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:02:10,781 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:02:10,781 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:02:10,781 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:02:10,781 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:02:10,781 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:02:10,781 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:02:10,781 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:02:10,781 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:02:10,781 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:02:10,781 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:02:10,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:02:10,782 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:02:10,782 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:02:10,782 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:02:10,782 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:02:10,782 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:02:10,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:02:10,782 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:02:10,782 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:02:10,782 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:02:10,983 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:02:11,001 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:02:11,002 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:02:11,003 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:02:11,003 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:02:11,004 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label00.c [2023-04-01 10:02:12,096 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:02:12,426 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:02:12,427 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label00.c [2023-04-01 10:02:12,449 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/178d8a244/038ee5fde53b44a8b18b1216d824c04e/FLAG8e522d5d7 [2023-04-01 10:02:12,461 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/178d8a244/038ee5fde53b44a8b18b1216d824c04e [2023-04-01 10:02:12,463 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:02:12,471 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:02:12,474 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:02:12,474 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:02:12,476 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:02:12,477 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:02:12" (1/1) ... [2023-04-01 10:02:12,477 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f41c5d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:12, skipping insertion in model container [2023-04-01 10:02:12,478 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:02:12" (1/1) ... [2023-04-01 10:02:12,482 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:02:12,567 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:02:12,730 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/eca-rers2012/Problem12_label00.c[2236,2249] [2023-04-01 10:02:13,317 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:02:13,327 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:02:13,347 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/eca-rers2012/Problem12_label00.c[2236,2249] [2023-04-01 10:02:13,636 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:02:13,654 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:02:13,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:13 WrapperNode [2023-04-01 10:02:13,655 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:02:13,656 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:02:13,657 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:02:13,657 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:02:13,665 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:13" (1/1) ... [2023-04-01 10:02:13,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:13" (1/1) ... [2023-04-01 10:02:13,729 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:13" (1/1) ... [2023-04-01 10:02:13,730 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:13" (1/1) ... [2023-04-01 10:02:13,806 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:13" (1/1) ... [2023-04-01 10:02:13,829 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:13" (1/1) ... [2023-04-01 10:02:13,857 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:13" (1/1) ... [2023-04-01 10:02:13,922 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:13" (1/1) ... [2023-04-01 10:02:13,947 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:02:13,949 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:02:13,949 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:02:13,949 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:02:13,950 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:13" (1/1) ... [2023-04-01 10:02:13,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:02:13,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:02:14,015 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) [2023-04-01 10:02:14,101 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 [2023-04-01 10:02:14,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:02:14,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:02:14,127 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:02:14,127 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:02:14,127 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:02:14,127 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 10:02:14,127 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 10:02:14,127 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:02:14,127 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:02:14,127 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:02:14,127 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 10:02:14,127 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 10:02:14,127 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:02:14,127 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:02:14,128 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:02:14,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:02:14,128 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:02:14,128 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:02:14,128 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:02:14,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:02:14,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:02:14,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:02:14,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:02:14,128 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:02:14,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:02:14,200 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:02:14,202 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:02:17,244 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:02:17,649 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:02:17,649 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:02:17,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:02:17 BoogieIcfgContainer [2023-04-01 10:02:17,652 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:02:17,654 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:02:17,655 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:02:17,657 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:02:17,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:02:12" (1/3) ... [2023-04-01 10:02:17,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a396010 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:02:17, skipping insertion in model container [2023-04-01 10:02:17,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:13" (2/3) ... [2023-04-01 10:02:17,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a396010 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:02:17, skipping insertion in model container [2023-04-01 10:02:17,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:02:17" (3/3) ... [2023-04-01 10:02:17,659 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label00.c [2023-04-01 10:02:17,672 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:02:17,672 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:02:17,733 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:02:17,738 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;@1df992da, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:02:17,738 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:02:17,745 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 10:02:17,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:02:17,751 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:02:17,751 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:02:17,752 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:02:17,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:02:17,757 INFO L85 PathProgramCache]: Analyzing trace with hash 832849378, now seen corresponding path program 1 times [2023-04-01 10:02:17,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:02:17,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770305438] [2023-04-01 10:02:17,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:02:17,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:02:17,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:02:18,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:02:18,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:02:18,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770305438] [2023-04-01 10:02:18,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770305438] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:02:18,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:02:18,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:02:18,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49488287] [2023-04-01 10:02:18,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:02:18,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:02:18,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:02:18,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:02:18,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:02:18,146 INFO L87 Difference]: Start difference. First operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:02:21,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:02:21,045 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-01 10:02:21,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:02:21,049 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 10:02:21,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:02:21,064 INFO L225 Difference]: With dead ends: 2068 [2023-04-01 10:02:21,064 INFO L226 Difference]: Without dead ends: 1371 [2023-04-01 10:02:21,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:02:21,071 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 705 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2073 mSolverCounterSat, 1079 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 3152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1079 IncrementalHoareTripleChecker+Valid, 2073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-01 10:02:21,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [705 Valid, 86 Invalid, 3152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1079 Valid, 2073 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-01 10:02:21,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-01 10:02:21,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1368. [2023-04-01 10:02:21,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1350 states have (on average 1.954074074074074) internal successors, (2638), 1350 states have internal predecessors, (2638), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-04-01 10:02:21,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 2661 transitions. [2023-04-01 10:02:21,156 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 2661 transitions. Word has length 11 [2023-04-01 10:02:21,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:02:21,156 INFO L495 AbstractCegarLoop]: Abstraction has 1368 states and 2661 transitions. [2023-04-01 10:02:21,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:02:21,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 2661 transitions. [2023-04-01 10:02:21,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 10:02:21,158 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:02:21,158 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 10:02:21,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:02:21,158 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:02:21,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:02:21,159 INFO L85 PathProgramCache]: Analyzing trace with hash -859892312, now seen corresponding path program 1 times [2023-04-01 10:02:21,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:02:21,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022338207] [2023-04-01 10:02:21,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:02:21,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:02:21,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:02:21,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:02:21,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:02:21,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022338207] [2023-04-01 10:02:21,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022338207] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:02:21,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:02:21,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:02:21,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111496224] [2023-04-01 10:02:21,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:02:21,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:02:21,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:02:21,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:02:21,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:02:21,430 INFO L87 Difference]: Start difference. First operand 1368 states and 2661 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:02:24,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:02:24,680 INFO L93 Difference]: Finished difference Result 4148 states and 8082 transitions. [2023-04-01 10:02:24,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:02:24,681 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2023-04-01 10:02:24,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:02:24,691 INFO L225 Difference]: With dead ends: 4148 [2023-04-01 10:02:24,692 INFO L226 Difference]: Without dead ends: 2785 [2023-04-01 10:02:24,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 10:02:24,695 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 2779 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 3735 mSolverCounterSat, 670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2779 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 4405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 3735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:02:24,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2779 Valid, 88 Invalid, 4405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 3735 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-04-01 10:02:24,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2785 states. [2023-04-01 10:02:24,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2785 to 2755. [2023-04-01 10:02:24,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2755 states, 2713 states have (on average 1.7143383708072244) internal successors, (4651), 2717 states have internal predecessors, (4651), 15 states have call successors, (15), 15 states have call predecessors, (15), 26 states have return successors, (62), 22 states have call predecessors, (62), 14 states have call successors, (62) [2023-04-01 10:02:24,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2755 states to 2755 states and 4728 transitions. [2023-04-01 10:02:24,762 INFO L78 Accepts]: Start accepts. Automaton has 2755 states and 4728 transitions. Word has length 32 [2023-04-01 10:02:24,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:02:24,763 INFO L495 AbstractCegarLoop]: Abstraction has 2755 states and 4728 transitions. [2023-04-01 10:02:24,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:02:24,763 INFO L276 IsEmpty]: Start isEmpty. Operand 2755 states and 4728 transitions. [2023-04-01 10:02:24,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-01 10:02:24,765 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:02:24,765 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-04-01 10:02:24,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:02:24,766 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:02:24,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:02:24,766 INFO L85 PathProgramCache]: Analyzing trace with hash -192544035, now seen corresponding path program 1 times [2023-04-01 10:02:24,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:02:24,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016329250] [2023-04-01 10:02:24,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:02:24,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:02:24,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:02:24,977 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 10:02:24,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:02:24,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016329250] [2023-04-01 10:02:24,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016329250] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:02:24,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330545876] [2023-04-01 10:02:24,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:02:24,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:02:24,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:02:24,995 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) [2023-04-01 10:02:24,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 10:02:25,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:02:25,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 10:02:25,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:02:25,142 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:02:25,142 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:02:25,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330545876] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:02:25,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:02:25,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 10:02:25,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138424133] [2023-04-01 10:02:25,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:02:25,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:02:25,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:02:25,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:02:25,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:02:25,144 INFO L87 Difference]: Start difference. First operand 2755 states and 4728 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 10:02:28,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:02:28,466 INFO L93 Difference]: Finished difference Result 7041 states and 12134 transitions. [2023-04-01 10:02:28,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:02:28,466 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 46 [2023-04-01 10:02:28,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:02:28,481 INFO L225 Difference]: With dead ends: 7041 [2023-04-01 10:02:28,481 INFO L226 Difference]: Without dead ends: 4291 [2023-04-01 10:02:28,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-04-01 10:02:28,486 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 2314 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 4274 mSolverCounterSat, 938 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2314 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 5212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 938 IncrementalHoareTripleChecker+Valid, 4274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-04-01 10:02:28,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2314 Valid, 99 Invalid, 5212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [938 Valid, 4274 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-04-01 10:02:28,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4291 states. [2023-04-01 10:02:28,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4291 to 4223. [2023-04-01 10:02:28,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4223 states, 4127 states have (on average 1.572570874727405) internal successors, (6490), 4145 states have internal predecessors, (6490), 21 states have call successors, (21), 21 states have call predecessors, (21), 74 states have return successors, (227), 56 states have call predecessors, (227), 20 states have call successors, (227) [2023-04-01 10:02:28,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4223 states to 4223 states and 6738 transitions. [2023-04-01 10:02:28,597 INFO L78 Accepts]: Start accepts. Automaton has 4223 states and 6738 transitions. Word has length 46 [2023-04-01 10:02:28,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:02:28,597 INFO L495 AbstractCegarLoop]: Abstraction has 4223 states and 6738 transitions. [2023-04-01 10:02:28,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 10:02:28,597 INFO L276 IsEmpty]: Start isEmpty. Operand 4223 states and 6738 transitions. [2023-04-01 10:02:28,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 10:02:28,604 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:02:28,604 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-04-01 10:02:28,610 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 10:02:28,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:02:28,810 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:02:28,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:02:28,812 INFO L85 PathProgramCache]: Analyzing trace with hash -677422274, now seen corresponding path program 1 times [2023-04-01 10:02:28,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:02:28,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433315539] [2023-04-01 10:02:28,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:02:28,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:02:28,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:02:28,988 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 10:02:28,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:02:28,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433315539] [2023-04-01 10:02:28,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433315539] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:02:28,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973542412] [2023-04-01 10:02:28,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:02:28,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:02:28,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:02:29,007 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:02:29,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 10:02:29,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:02:29,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 10:02:29,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:02:29,152 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:02:29,153 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:02:29,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973542412] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:02:29,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:02:29,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 10:02:29,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656400829] [2023-04-01 10:02:29,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:02:29,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:02:29,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:02:29,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:02:29,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:02:29,157 INFO L87 Difference]: Start difference. First operand 4223 states and 6738 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 10:02:32,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:02:32,647 INFO L93 Difference]: Finished difference Result 12959 states and 21727 transitions. [2023-04-01 10:02:32,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:02:32,647 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 51 [2023-04-01 10:02:32,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:02:32,676 INFO L225 Difference]: With dead ends: 12959 [2023-04-01 10:02:32,676 INFO L226 Difference]: Without dead ends: 8741 [2023-04-01 10:02:32,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-04-01 10:02:32,683 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 2175 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 3775 mSolverCounterSat, 1631 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2175 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 5406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1631 IncrementalHoareTripleChecker+Valid, 3775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-04-01 10:02:32,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2175 Valid, 83 Invalid, 5406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1631 Valid, 3775 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-04-01 10:02:32,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8741 states. [2023-04-01 10:02:32,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8741 to 8438. [2023-04-01 10:02:32,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8438 states, 8193 states have (on average 1.5386305382643721) internal successors, (12606), 8255 states have internal predecessors, (12606), 39 states have call successors, (39), 39 states have call predecessors, (39), 205 states have return successors, (1075), 143 states have call predecessors, (1075), 38 states have call successors, (1075) [2023-04-01 10:02:32,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8438 states to 8438 states and 13720 transitions. [2023-04-01 10:02:32,849 INFO L78 Accepts]: Start accepts. Automaton has 8438 states and 13720 transitions. Word has length 51 [2023-04-01 10:02:32,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:02:32,849 INFO L495 AbstractCegarLoop]: Abstraction has 8438 states and 13720 transitions. [2023-04-01 10:02:32,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 10:02:32,849 INFO L276 IsEmpty]: Start isEmpty. Operand 8438 states and 13720 transitions. [2023-04-01 10:02:32,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-01 10:02:32,850 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:02:32,850 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 10:02:32,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 10:02:33,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-01 10:02:33,064 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:02:33,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:02:33,064 INFO L85 PathProgramCache]: Analyzing trace with hash 43848177, now seen corresponding path program 1 times [2023-04-01 10:02:33,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:02:33,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404868112] [2023-04-01 10:02:33,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:02:33,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:02:33,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:02:33,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:02:33,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:02:33,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404868112] [2023-04-01 10:02:33,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404868112] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:02:33,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:02:33,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:02:33,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385885303] [2023-04-01 10:02:33,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:02:33,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:02:33,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:02:33,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:02:33,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:02:33,193 INFO L87 Difference]: Start difference. First operand 8438 states and 13720 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:02:37,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:02:37,043 INFO L93 Difference]: Finished difference Result 25907 states and 45435 transitions. [2023-04-01 10:02:37,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:02:37,044 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2023-04-01 10:02:37,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:02:37,108 INFO L225 Difference]: With dead ends: 25907 [2023-04-01 10:02:37,108 INFO L226 Difference]: Without dead ends: 17474 [2023-04-01 10:02:37,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:02:37,130 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 2133 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 4381 mSolverCounterSat, 1079 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2133 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 5460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1079 IncrementalHoareTripleChecker+Valid, 4381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-04-01 10:02:37,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2133 Valid, 134 Invalid, 5460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1079 Valid, 4381 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-04-01 10:02:37,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17474 states. [2023-04-01 10:02:37,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17474 to 15210. [2023-04-01 10:02:37,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15210 states, 14635 states have (on average 1.3758114110010249) internal successors, (20135), 14809 states have internal predecessors, (20135), 71 states have call successors, (71), 71 states have call predecessors, (71), 503 states have return successors, (3356), 329 states have call predecessors, (3356), 70 states have call successors, (3356) [2023-04-01 10:02:37,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15210 states to 15210 states and 23562 transitions. [2023-04-01 10:02:37,473 INFO L78 Accepts]: Start accepts. Automaton has 15210 states and 23562 transitions. Word has length 55 [2023-04-01 10:02:37,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:02:37,473 INFO L495 AbstractCegarLoop]: Abstraction has 15210 states and 23562 transitions. [2023-04-01 10:02:37,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:02:37,474 INFO L276 IsEmpty]: Start isEmpty. Operand 15210 states and 23562 transitions. [2023-04-01 10:02:37,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-01 10:02:37,475 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:02:37,475 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 10:02:37,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 10:02:37,476 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:02:37,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:02:37,476 INFO L85 PathProgramCache]: Analyzing trace with hash 835697853, now seen corresponding path program 1 times [2023-04-01 10:02:37,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:02:37,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414690806] [2023-04-01 10:02:37,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:02:37,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:02:37,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:02:37,594 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:02:37,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:02:37,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414690806] [2023-04-01 10:02:37,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414690806] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:02:37,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:02:37,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:02:37,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128250350] [2023-04-01 10:02:37,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:02:37,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:02:37,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:02:37,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:02:37,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:02:37,598 INFO L87 Difference]: Start difference. First operand 15210 states and 23562 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:02:40,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:02:40,943 INFO L93 Difference]: Finished difference Result 44011 states and 74814 transitions. [2023-04-01 10:02:40,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:02:40,944 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 65 [2023-04-01 10:02:40,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:02:41,060 INFO L225 Difference]: With dead ends: 44011 [2023-04-01 10:02:41,061 INFO L226 Difference]: Without dead ends: 28806 [2023-04-01 10:02:41,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:02:41,104 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 2386 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 3823 mSolverCounterSat, 1265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2386 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 5088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1265 IncrementalHoareTripleChecker+Valid, 3823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:02:41,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2386 Valid, 101 Invalid, 5088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1265 Valid, 3823 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-04-01 10:02:41,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28806 states. [2023-04-01 10:02:41,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28806 to 28379. [2023-04-01 10:02:41,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28379 states, 27545 states have (on average 1.3458340896714467) internal successors, (37071), 27786 states have internal predecessors, (37071), 132 states have call successors, (132), 132 states have call predecessors, (132), 701 states have return successors, (7505), 460 states have call predecessors, (7505), 131 states have call successors, (7505) [2023-04-01 10:02:41,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28379 states to 28379 states and 44708 transitions. [2023-04-01 10:02:41,892 INFO L78 Accepts]: Start accepts. Automaton has 28379 states and 44708 transitions. Word has length 65 [2023-04-01 10:02:41,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:02:41,893 INFO L495 AbstractCegarLoop]: Abstraction has 28379 states and 44708 transitions. [2023-04-01 10:02:41,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:02:41,893 INFO L276 IsEmpty]: Start isEmpty. Operand 28379 states and 44708 transitions. [2023-04-01 10:02:41,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-04-01 10:02:41,894 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:02:41,894 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:02:41,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 10:02:41,894 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:02:41,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:02:41,895 INFO L85 PathProgramCache]: Analyzing trace with hash 385399273, now seen corresponding path program 1 times [2023-04-01 10:02:41,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:02:41,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470093358] [2023-04-01 10:02:41,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:02:41,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:02:41,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:02:42,194 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:02:42,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:02:42,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470093358] [2023-04-01 10:02:42,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470093358] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:02:42,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820273552] [2023-04-01 10:02:42,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:02:42,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:02:42,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:02:42,214 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:02:42,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 10:02:42,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:02:42,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:02:42,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:02:42,446 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:02:42,446 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:02:42,645 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:02:42,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820273552] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:02:42,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [889365641] [2023-04-01 10:02:42,696 INFO L159 IcfgInterpreter]: Started Sifa with 72 locations of interest [2023-04-01 10:02:42,696 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:02:42,698 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:02:42,701 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:02:42,701 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:02:42,957 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 84 for LOIs [2023-04-01 10:02:43,168 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2023-04-01 10:02:45,618 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 52