/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem12_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 19:19:00,094 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 19:19:00,095 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 19:19:00,122 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 19:19:00,122 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 19:19:00,123 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 19:19:00,124 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 19:19:00,129 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 19:19:00,130 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 19:19:00,134 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 19:19:00,136 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 19:19:00,137 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 19:19:00,137 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 19:19:00,139 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 19:19:00,141 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 19:19:00,142 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 19:19:00,143 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 19:19:00,143 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 19:19:00,145 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 19:19:00,149 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 19:19:00,150 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 19:19:00,152 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 19:19:00,153 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 19:19:00,154 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 19:19:00,160 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 19:19:00,161 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 19:19:00,161 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 19:19:00,162 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 19:19:00,162 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 19:19:00,163 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 19:19:00,163 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 19:19:00,163 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 19:19:00,164 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 19:19:00,165 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 19:19:00,165 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 19:19:00,165 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 19:19:00,165 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 19:19:00,166 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 19:19:00,166 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 19:19:00,166 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 19:19:00,167 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 19:19:00,168 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 [2023-04-02 19:19:00,192 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 19:19:00,192 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 19:19:00,192 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 19:19:00,192 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 19:19:00,193 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 19:19:00,193 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 19:19:00,193 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 19:19:00,193 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 19:19:00,193 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 19:19:00,193 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 19:19:00,194 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 19:19:00,194 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 19:19:00,194 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 19:19:00,194 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 19:19:00,194 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 19:19:00,195 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 19:19:00,195 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 19:19:00,195 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 19:19:00,195 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 19:19:00,195 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 19:19:00,195 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 19:19:00,195 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 19:19:00,196 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 19:19:00,196 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 19:19:00,196 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 19:19:00,196 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 19:19:00,196 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 19:19:00,196 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 19:19:00,196 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 19:19:00,196 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 19:19:00,196 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 19:19:00,197 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 19:19:00,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 19:19:00,197 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 19:19:00,197 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 19:19:00,197 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 19:19:00,197 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 19:19:00,197 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 19:19:00,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 19:19:00,197 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 19:19:00,197 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 19:19:00,197 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 19:19:00,373 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 19:19:00,389 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 19:19:00,391 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 19:19:00,391 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 19:19:00,392 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 19:19:00,393 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label17.c [2023-04-02 19:19:01,477 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 19:19:01,842 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 19:19:01,842 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label17.c [2023-04-02 19:19:01,866 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1c98715a/ada52780a54047d29867a4e3d50e65ff/FLAG18a20a00e [2023-04-02 19:19:01,880 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1c98715a/ada52780a54047d29867a4e3d50e65ff [2023-04-02 19:19:01,882 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 19:19:01,883 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 19:19:01,885 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 19:19:01,885 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 19:19:01,887 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 19:19:01,888 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 07:19:01" (1/1) ... [2023-04-02 19:19:01,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72654a66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:19:01, skipping insertion in model container [2023-04-02 19:19:01,889 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 07:19:01" (1/1) ... [2023-04-02 19:19:01,894 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 19:19:01,992 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 19:19:02,171 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_label17.c[5134,5147] [2023-04-02 19:19:02,743 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 19:19:02,751 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 19:19:02,771 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_label17.c[5134,5147] [2023-04-02 19:19:03,043 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 19:19:03,059 INFO L208 MainTranslator]: Completed translation [2023-04-02 19:19:03,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:19:03 WrapperNode [2023-04-02 19:19:03,059 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 19:19:03,060 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 19:19:03,060 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 19:19:03,060 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 19:19:03,068 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:19:03" (1/1) ... [2023-04-02 19:19:03,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:19:03" (1/1) ... [2023-04-02 19:19:03,107 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:19:03" (1/1) ... [2023-04-02 19:19:03,108 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:19:03" (1/1) ... [2023-04-02 19:19:03,188 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:19:03" (1/1) ... [2023-04-02 19:19:03,207 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:19:03" (1/1) ... [2023-04-02 19:19:03,244 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:19:03" (1/1) ... [2023-04-02 19:19:03,255 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:19:03" (1/1) ... [2023-04-02 19:19:03,273 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 19:19:03,274 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 19:19:03,274 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 19:19:03,275 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 19:19:03,275 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:19:03" (1/1) ... [2023-04-02 19:19:03,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 19:19:03,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:19:03,298 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) [2023-04-02 19:19:03,315 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 [2023-04-02 19:19:03,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 19:19:03,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 19:19:03,325 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 19:19:03,325 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-02 19:19:03,326 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-02 19:19:03,326 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-02 19:19:03,326 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-02 19:19:03,326 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 19:19:03,326 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-02 19:19:03,326 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-02 19:19:03,326 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-02 19:19:03,326 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-02 19:19:03,326 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 19:19:03,326 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 19:19:03,326 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 19:19:03,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 19:19:03,326 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 19:19:03,326 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 19:19:03,326 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 19:19:03,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 19:19:03,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 19:19:03,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 19:19:03,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 19:19:03,327 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 19:19:03,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 19:19:03,395 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 19:19:03,397 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 19:19:06,302 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 19:19:06,759 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 19:19:06,760 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 19:19:06,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 07:19:06 BoogieIcfgContainer [2023-04-02 19:19:06,764 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 19:19:06,766 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 19:19:06,766 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 19:19:06,768 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 19:19:06,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 07:19:01" (1/3) ... [2023-04-02 19:19:06,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15e13791 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 07:19:06, skipping insertion in model container [2023-04-02 19:19:06,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:19:03" (2/3) ... [2023-04-02 19:19:06,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15e13791 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 07:19:06, skipping insertion in model container [2023-04-02 19:19:06,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 07:19:06" (3/3) ... [2023-04-02 19:19:06,770 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label17.c [2023-04-02 19:19:06,781 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 19:19:06,781 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 19:19:06,826 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 19:19:06,830 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;@1aa9ad68, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 19:19:06,831 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 19:19:06,835 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) [2023-04-02 19:19:06,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 19:19:06,840 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:19:06,840 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:19:06,840 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:19:06,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:19:06,844 INFO L85 PathProgramCache]: Analyzing trace with hash 636342273, now seen corresponding path program 1 times [2023-04-02 19:19:06,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:19:06,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426267677] [2023-04-02 19:19:06,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:19:06,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:19:06,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:19:07,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 19:19:07,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:19:07,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426267677] [2023-04-02 19:19:07,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426267677] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:19:07,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:19:07,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 19:19:07,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242827600] [2023-04-02 19:19:07,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:19:07,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 19:19:07,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:19:07,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 19:19:07,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 19:19:07,171 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) [2023-04-02 19:19:10,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:19:10,049 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-02 19:19:10,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 19:19:10,051 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 [2023-04-02 19:19:10,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:19:10,069 INFO L225 Difference]: With dead ends: 2068 [2023-04-02 19:19:10,069 INFO L226 Difference]: Without dead ends: 1371 [2023-04-02 19:19:10,074 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 [2023-04-02 19:19:10,076 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 846 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 884 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 2879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 884 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-02 19:19:10,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 217 Invalid, 2879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [884 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-02 19:19:10,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-02 19:19:10,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1368. [2023-04-02 19:19:10,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1350 states have (on average 1.857037037037037) internal successors, (2507), 1350 states have internal predecessors, (2507), 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) [2023-04-02 19:19:10,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 2530 transitions. [2023-04-02 19:19:10,178 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 2530 transitions. Word has length 11 [2023-04-02 19:19:10,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:19:10,179 INFO L495 AbstractCegarLoop]: Abstraction has 1368 states and 2530 transitions. [2023-04-02 19:19:10,179 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) [2023-04-02 19:19:10,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 2530 transitions. [2023-04-02 19:19:10,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-02 19:19:10,180 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:19:10,181 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] [2023-04-02 19:19:10,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 19:19:10,181 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:19:10,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:19:10,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1811488860, now seen corresponding path program 1 times [2023-04-02 19:19:10,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:19:10,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440256183] [2023-04-02 19:19:10,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:19:10,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:19:10,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:19:10,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 19:19:10,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:19:10,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440256183] [2023-04-02 19:19:10,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440256183] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:19:10,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:19:10,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 19:19:10,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610582049] [2023-04-02 19:19:10,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:19:10,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:19:10,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:19:10,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:19:10,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 19:19:10,301 INFO L87 Difference]: Start difference. First operand 1368 states and 2530 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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) [2023-04-02 19:19:13,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:19:13,668 INFO L93 Difference]: Finished difference Result 4138 states and 7702 transitions. [2023-04-02 19:19:13,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 19:19:13,669 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 25 [2023-04-02 19:19:13,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:19:13,681 INFO L225 Difference]: With dead ends: 4138 [2023-04-02 19:19:13,685 INFO L226 Difference]: Without dead ends: 2775 [2023-04-02 19:19:13,694 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 [2023-04-02 19:19:13,696 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 2488 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 3906 mSolverCounterSat, 910 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2488 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 4816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 910 IncrementalHoareTripleChecker+Valid, 3906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-04-02 19:19:13,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2488 Valid, 118 Invalid, 4816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [910 Valid, 3906 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-04-02 19:19:13,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2775 states. [2023-04-02 19:19:13,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2775 to 2757. [2023-04-02 19:19:13,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2757 states, 2715 states have (on average 1.6976058931860036) internal successors, (4609), 2719 states have internal predecessors, (4609), 15 states have call successors, (15), 15 states have call predecessors, (15), 26 states have return successors, (77), 22 states have call predecessors, (77), 14 states have call successors, (77) [2023-04-02 19:19:13,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2757 states to 2757 states and 4701 transitions. [2023-04-02 19:19:13,796 INFO L78 Accepts]: Start accepts. Automaton has 2757 states and 4701 transitions. Word has length 25 [2023-04-02 19:19:13,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:19:13,796 INFO L495 AbstractCegarLoop]: Abstraction has 2757 states and 4701 transitions. [2023-04-02 19:19:13,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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) [2023-04-02 19:19:13,797 INFO L276 IsEmpty]: Start isEmpty. Operand 2757 states and 4701 transitions. [2023-04-02 19:19:13,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-02 19:19:13,798 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:19:13,798 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] [2023-04-02 19:19:13,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 19:19:13,798 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:19:13,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:19:13,799 INFO L85 PathProgramCache]: Analyzing trace with hash -224741163, now seen corresponding path program 1 times [2023-04-02 19:19:13,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:19:13,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567745600] [2023-04-02 19:19:13,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:19:13,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:19:13,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:19:13,956 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 19:19:13,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:19:13,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567745600] [2023-04-02 19:19:13,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567745600] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:19:13,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:19:13,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 19:19:13,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160354529] [2023-04-02 19:19:13,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:19:13,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:19:13,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:19:13,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:19:13,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 19:19:13,958 INFO L87 Difference]: Start difference. First operand 2757 states and 4701 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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) [2023-04-02 19:19:16,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:19:16,917 INFO L93 Difference]: Finished difference Result 7729 states and 13220 transitions. [2023-04-02 19:19:16,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 19:19:16,917 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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 30 [2023-04-02 19:19:16,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:19:16,939 INFO L225 Difference]: With dead ends: 7729 [2023-04-02 19:19:16,939 INFO L226 Difference]: Without dead ends: 4977 [2023-04-02 19:19:16,946 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 [2023-04-02 19:19:16,950 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 2452 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 3744 mSolverCounterSat, 1261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2452 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 5005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1261 IncrementalHoareTripleChecker+Valid, 3744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-02 19:19:16,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2452 Valid, 95 Invalid, 5005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1261 Valid, 3744 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-02 19:19:16,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4977 states. [2023-04-02 19:19:17,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4977 to 4896. [2023-04-02 19:19:17,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4896 states, 4789 states have (on average 1.579661724785968) internal successors, (7565), 4809 states have internal predecessors, (7565), 24 states have call successors, (24), 24 states have call predecessors, (24), 82 states have return successors, (335), 62 states have call predecessors, (335), 23 states have call successors, (335) [2023-04-02 19:19:17,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4896 states to 4896 states and 7924 transitions. [2023-04-02 19:19:17,065 INFO L78 Accepts]: Start accepts. Automaton has 4896 states and 7924 transitions. Word has length 30 [2023-04-02 19:19:17,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:19:17,065 INFO L495 AbstractCegarLoop]: Abstraction has 4896 states and 7924 transitions. [2023-04-02 19:19:17,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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) [2023-04-02 19:19:17,066 INFO L276 IsEmpty]: Start isEmpty. Operand 4896 states and 7924 transitions. [2023-04-02 19:19:17,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-02 19:19:17,068 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:19:17,068 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] [2023-04-02 19:19:17,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 19:19:17,068 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:19:17,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:19:17,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1406240931, now seen corresponding path program 1 times [2023-04-02 19:19:17,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:19:17,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817765953] [2023-04-02 19:19:17,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:19:17,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:19:17,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:19:17,185 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 19:19:17,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:19:17,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817765953] [2023-04-02 19:19:17,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817765953] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 19:19:17,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483847119] [2023-04-02 19:19:17,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:19:17,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:19:17,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:19:17,188 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) [2023-04-02 19:19:17,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 19:19:17,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:19:17,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 19:19:17,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 19:19:17,393 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 19:19:17,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 19:19:17,503 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 19:19:17,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483847119] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 19:19:17,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2147129234] [2023-04-02 19:19:17,517 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-04-02 19:19:17,517 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 19:19:17,519 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 19:19:17,524 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 19:19:17,524 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 19:19:17,672 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 52 for LOIs [2023-04-02 19:19:17,851 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 34 [2023-04-02 19:19:19,493 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 69382 conjuctions. This might take some time... [2023-04-02 19:19:24,428 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 681 conjuctions. [2023-04-02 19:19:33,303 WARN L223 SmtUtils]: Spent 5.07s on a formula simplification that was a NOOP. DAG size: 638 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-02 19:19:59,797 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 27