/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/Problem05_label18.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:33:09,736 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:33:09,740 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:33:09,763 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:33:09,764 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:33:09,764 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:33:09,765 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:33:09,767 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:33:09,768 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:33:09,769 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:33:09,769 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:33:09,770 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:33:09,770 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:33:09,771 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:33:09,772 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:33:09,773 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:33:09,773 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:33:09,775 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:33:09,776 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:33:09,777 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:33:09,778 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:33:09,780 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:33:09,781 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:33:09,782 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:33:09,785 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:33:09,785 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:33:09,785 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:33:09,786 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:33:09,786 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:33:09,787 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:33:09,787 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:33:09,788 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:33:09,788 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:33:09,789 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:33:09,790 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:33:09,790 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:33:09,791 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:33:09,791 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:33:09,791 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:33:09,792 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:33:09,792 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:33:09,793 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 09:33:09,812 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:33:09,812 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:33:09,813 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:33:09,813 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:33:09,814 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:33:09,814 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:33:09,814 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:33:09,814 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:33:09,814 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:33:09,814 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:33:09,815 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:33:09,815 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:33:09,815 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:33:09,815 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:33:09,815 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:33:09,816 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:33:09,816 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:33:09,816 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:33:09,816 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:33:09,817 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:33:09,817 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:33:09,817 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:33:09,817 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:33:09,817 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:33:09,817 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:33:09,817 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:33:09,818 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:33:09,818 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:33:09,818 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:33:09,818 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:33:09,818 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:33:09,818 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:33:09,819 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:33:09,819 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:33:09,819 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:33:09,819 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:33:09,819 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:33:09,820 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:33:09,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:33:09,820 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:33:09,820 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:33:09,820 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:33:10,072 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:33:10,105 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:33:10,107 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:33:10,108 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:33:10,110 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:33:10,111 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem05_label18.c [2023-04-01 09:33:11,293 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:33:11,848 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:33:11,850 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem05_label18.c [2023-04-01 09:33:11,897 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f0c2f9dc/83c26672758341a6aec69598f25a0830/FLAG13bdbd21d [2023-04-01 09:33:11,914 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f0c2f9dc/83c26672758341a6aec69598f25a0830 [2023-04-01 09:33:11,917 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:33:11,922 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:33:11,927 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:33:11,928 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:33:11,935 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:33:11,936 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:33:11" (1/1) ... [2023-04-01 09:33:11,937 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79cc4f0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:33:11, skipping insertion in model container [2023-04-01 09:33:11,937 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:33:11" (1/1) ... [2023-04-01 09:33:11,943 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:33:12,149 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:33:13,581 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/Problem05_label18.c[375502,375515] [2023-04-01 09:33:13,603 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:33:13,611 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:33:14,373 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/Problem05_label18.c[375502,375515] [2023-04-01 09:33:14,381 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:33:14,426 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:33:14,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:33:14 WrapperNode [2023-04-01 09:33:14,428 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:33:14,429 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:33:14,430 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:33:14,430 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:33:14,439 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:33:14" (1/1) ... [2023-04-01 09:33:14,440 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:33:14" (1/1) ... [2023-04-01 09:33:14,517 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:33:14" (1/1) ... [2023-04-01 09:33:14,518 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:33:14" (1/1) ... [2023-04-01 09:33:14,768 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:33:14" (1/1) ... [2023-04-01 09:33:14,871 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:33:14" (1/1) ... [2023-04-01 09:33:14,935 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:33:14" (1/1) ... [2023-04-01 09:33:14,955 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:33:14" (1/1) ... [2023-04-01 09:33:15,028 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:33:15,029 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:33:15,029 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:33:15,030 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:33:15,031 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:33:14" (1/1) ... [2023-04-01 09:33:15,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:33:15,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:33:15,057 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 09:33:15,064 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 09:33:15,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:33:15,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:33:15,094 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:33:15,094 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 09:33:15,094 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 09:33:15,095 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 09:33:15,095 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 09:33:15,095 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-04-01 09:33:15,095 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-04-01 09:33:15,095 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output7 [2023-04-01 09:33:15,095 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output8 [2023-04-01 09:33:15,095 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:33:15,095 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 09:33:15,095 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 09:33:15,095 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 09:33:15,096 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 09:33:15,096 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-04-01 09:33:15,096 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-04-01 09:33:15,096 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output7 [2023-04-01 09:33:15,096 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output8 [2023-04-01 09:33:15,096 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:33:15,096 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:33:15,096 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:33:15,096 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:33:15,096 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 09:33:15,096 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 09:33:15,096 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:33:15,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:33:15,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:33:15,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:33:15,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:33:15,097 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:33:15,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:33:15,167 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:33:15,169 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:33:21,683 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:33:23,158 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:33:23,158 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 09:33:23,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:33:23 BoogieIcfgContainer [2023-04-01 09:33:23,163 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:33:23,165 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:33:23,166 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:33:23,168 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:33:23,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:33:11" (1/3) ... [2023-04-01 09:33:23,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f76f84c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:33:23, skipping insertion in model container [2023-04-01 09:33:23,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:33:14" (2/3) ... [2023-04-01 09:33:23,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f76f84c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:33:23, skipping insertion in model container [2023-04-01 09:33:23,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:33:23" (3/3) ... [2023-04-01 09:33:23,171 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label18.c [2023-04-01 09:33:23,187 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:33:23,187 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:33:23,265 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:33:23,271 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;@7c53f3de, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:33:23,271 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:33:23,282 INFO L276 IsEmpty]: Start isEmpty. Operand has 1681 states, 1659 states have (on average 1.9825195901145267) internal successors, (3289), 1660 states have internal predecessors, (3289), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 09:33:23,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1652 [2023-04-01 09:33:23,378 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:33:23,380 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:33:23,380 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:33:23,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:33:23,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1963495851, now seen corresponding path program 1 times [2023-04-01 09:33:23,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:33:23,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909211011] [2023-04-01 09:33:23,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:33:23,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:33:24,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:33:31,995 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 09:33:31,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:33:31,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909211011] [2023-04-01 09:33:31,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909211011] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:33:31,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:33:31,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 09:33:31,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092939183] [2023-04-01 09:33:31,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:33:32,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:33:32,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:33:32,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:33:32,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 09:33:32,042 INFO L87 Difference]: Start difference. First operand has 1681 states, 1659 states have (on average 1.9825195901145267) internal successors, (3289), 1660 states have internal predecessors, (3289), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 546.6666666666666) internal successors, (1640), 2 states have internal predecessors, (1640), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:33:37,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:33:37,985 INFO L93 Difference]: Finished difference Result 5031 states and 9947 transitions. [2023-04-01 09:33:37,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:33:37,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 546.6666666666666) internal successors, (1640), 2 states have internal predecessors, (1640), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1651 [2023-04-01 09:33:37,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:33:38,034 INFO L225 Difference]: With dead ends: 5031 [2023-04-01 09:33:38,034 INFO L226 Difference]: Without dead ends: 3347 [2023-04-01 09:33:38,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 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 09:33:38,052 INFO L413 NwaCegarLoop]: 524 mSDtfsCounter, 207 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 5470 mSolverCounterSat, 1339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 6809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1339 IncrementalHoareTripleChecker+Valid, 5470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2023-04-01 09:33:38,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 572 Invalid, 6809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1339 Valid, 5470 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2023-04-01 09:33:38,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3347 states. [2023-04-01 09:33:38,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3347 to 3347. [2023-04-01 09:33:38,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3347 states, 3311 states have (on average 1.8248263364542434) internal successors, (6042), 3311 states have internal predecessors, (6042), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (33), 17 states have call predecessors, (33), 17 states have call successors, (33) [2023-04-01 09:33:38,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3347 states to 3347 states and 6093 transitions. [2023-04-01 09:33:38,220 INFO L78 Accepts]: Start accepts. Automaton has 3347 states and 6093 transitions. Word has length 1651 [2023-04-01 09:33:38,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:33:38,225 INFO L495 AbstractCegarLoop]: Abstraction has 3347 states and 6093 transitions. [2023-04-01 09:33:38,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 546.6666666666666) internal successors, (1640), 2 states have internal predecessors, (1640), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:33:38,226 INFO L276 IsEmpty]: Start isEmpty. Operand 3347 states and 6093 transitions. [2023-04-01 09:33:38,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1661 [2023-04-01 09:33:38,402 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:33:38,404 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:33:38,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 09:33:38,405 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:33:38,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:33:38,406 INFO L85 PathProgramCache]: Analyzing trace with hash 282323472, now seen corresponding path program 1 times [2023-04-01 09:33:38,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:33:38,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469122462] [2023-04-01 09:33:38,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:33:38,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:33:38,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:33:41,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:33:41,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:33:41,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469122462] [2023-04-01 09:33:41,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469122462] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:33:41,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:33:41,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:33:41,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061402854] [2023-04-01 09:33:41,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:33:41,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:33:41,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:33:41,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:33:41,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:33:41,404 INFO L87 Difference]: Start difference. First operand 3347 states and 6093 transitions. Second operand has 5 states, 5 states have (on average 329.4) internal successors, (1647), 4 states have internal predecessors, (1647), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:33:48,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:33:48,852 INFO L93 Difference]: Finished difference Result 10226 states and 18655 transitions. [2023-04-01 09:33:48,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:33:48,853 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 329.4) internal successors, (1647), 4 states have internal predecessors, (1647), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 1660 [2023-04-01 09:33:48,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:33:48,890 INFO L225 Difference]: With dead ends: 10226 [2023-04-01 09:33:48,890 INFO L226 Difference]: Without dead ends: 6884 [2023-04-01 09:33:48,900 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 09:33:48,902 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 6831 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 8860 mSolverCounterSat, 3038 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6831 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 11898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3038 IncrementalHoareTripleChecker+Valid, 8860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:33:48,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6831 Valid, 203 Invalid, 11898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3038 Valid, 8860 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2023-04-01 09:33:48,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6884 states. [2023-04-01 09:33:49,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6884 to 6819. [2023-04-01 09:33:49,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6819 states, 6705 states have (on average 1.6956002982848621) internal successors, (11369), 6711 states have internal predecessors, (11369), 34 states have call successors, (34), 34 states have call predecessors, (34), 79 states have return successors, (205), 73 states have call predecessors, (205), 33 states have call successors, (205) [2023-04-01 09:33:49,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6819 states to 6819 states and 11608 transitions. [2023-04-01 09:33:49,108 INFO L78 Accepts]: Start accepts. Automaton has 6819 states and 11608 transitions. Word has length 1660 [2023-04-01 09:33:49,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:33:49,108 INFO L495 AbstractCegarLoop]: Abstraction has 6819 states and 11608 transitions. [2023-04-01 09:33:49,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 329.4) internal successors, (1647), 4 states have internal predecessors, (1647), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:33:49,110 INFO L276 IsEmpty]: Start isEmpty. Operand 6819 states and 11608 transitions. [2023-04-01 09:33:49,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1663 [2023-04-01 09:33:49,142 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:33:49,143 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:33:49,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 09:33:49,144 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:33:49,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:33:49,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1263733228, now seen corresponding path program 1 times [2023-04-01 09:33:49,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:33:49,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265977064] [2023-04-01 09:33:49,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:33:49,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:33:49,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:33:53,534 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:33:53,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:33:53,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265977064] [2023-04-01 09:33:53,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265977064] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:33:53,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:33:53,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 09:33:53,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518595672] [2023-04-01 09:33:53,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:33:53,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:33:53,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:33:53,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:33:53,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 09:33:53,542 INFO L87 Difference]: Start difference. First operand 6819 states and 11608 transitions. Second operand has 3 states, 3 states have (on average 549.6666666666666) internal successors, (1649), 3 states have internal predecessors, (1649), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2)