/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label52.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 11:14:41,201 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 11:14:41,205 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 11:14:41,231 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 11:14:41,231 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 11:14:41,232 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 11:14:41,234 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 11:14:41,236 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 11:14:41,237 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 11:14:41,238 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 11:14:41,240 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 11:14:41,241 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 11:14:41,241 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 11:14:41,242 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 11:14:41,243 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 11:14:41,245 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 11:14:41,246 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 11:14:41,249 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 11:14:41,250 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 11:14:41,252 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 11:14:41,254 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 11:14:41,255 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 11:14:41,256 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 11:14:41,257 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 11:14:41,260 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 11:14:41,260 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 11:14:41,260 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 11:14:41,261 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 11:14:41,262 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 11:14:41,263 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 11:14:41,263 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 11:14:41,264 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 11:14:41,265 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 11:14:41,266 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 11:14:41,267 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 11:14:41,267 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 11:14:41,268 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 11:14:41,268 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 11:14:41,269 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 11:14:41,270 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 11:14:41,271 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 11:14:41,272 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 11:14:41,299 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 11:14:41,299 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 11:14:41,300 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 11:14:41,300 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 11:14:41,301 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 11:14:41,301 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 11:14:41,301 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 11:14:41,301 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 11:14:41,301 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 11:14:41,302 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 11:14:41,302 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 11:14:41,302 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 11:14:41,302 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 11:14:41,302 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 11:14:41,303 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 11:14:41,303 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 11:14:41,303 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 11:14:41,303 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 11:14:41,303 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 11:14:41,304 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 11:14:41,304 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 11:14:41,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:14:41,304 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 11:14:41,304 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 11:14:41,305 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 11:14:41,305 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 11:14:41,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 11:14:41,305 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 11:14:41,305 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 11:14:41,306 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; [2020-09-25 11:14:41,790 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 11:14:41,807 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 11:14:41,811 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 11:14:41,812 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 11:14:41,813 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 11:14:41,814 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label52.c [2020-09-25 11:14:41,904 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/38b049f1d/9b2b333b3dff4c4295d7b40ca67bdec1/FLAG0a173ab68 [2020-09-25 11:14:42,537 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 11:14:42,538 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label52.c [2020-09-25 11:14:42,552 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/38b049f1d/9b2b333b3dff4c4295d7b40ca67bdec1/FLAG0a173ab68 [2020-09-25 11:14:42,785 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/38b049f1d/9b2b333b3dff4c4295d7b40ca67bdec1 [2020-09-25 11:14:42,801 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 11:14:42,808 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 11:14:42,809 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 11:14:42,809 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 11:14:42,813 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 11:14:42,815 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:14:42" (1/1) ... [2020-09-25 11:14:42,819 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e4b387e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:42, skipping insertion in model container [2020-09-25 11:14:42,819 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:14:42" (1/1) ... [2020-09-25 11:14:42,828 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 11:14:42,883 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 11:14:43,380 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:14:43,391 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 11:14:43,596 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:14:43,615 INFO L208 MainTranslator]: Completed translation [2020-09-25 11:14:43,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:43 WrapperNode [2020-09-25 11:14:43,616 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 11:14:43,617 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 11:14:43,617 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 11:14:43,618 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 11:14:43,632 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:43" (1/1) ... [2020-09-25 11:14:43,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:43" (1/1) ... [2020-09-25 11:14:43,654 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:43" (1/1) ... [2020-09-25 11:14:43,654 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:43" (1/1) ... [2020-09-25 11:14:43,698 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:43" (1/1) ... [2020-09-25 11:14:43,717 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:43" (1/1) ... [2020-09-25 11:14:43,728 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:43" (1/1) ... [2020-09-25 11:14:43,738 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 11:14:43,739 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 11:14:43,739 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 11:14:43,739 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 11:14:43,740 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:43" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:14:43,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 11:14:43,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 11:14:43,821 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 11:14:43,821 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 11:14:43,821 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 11:14:43,821 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 11:14:43,822 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 11:14:43,822 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 11:14:43,822 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 11:14:43,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 11:14:43,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 11:14:45,130 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 11:14:45,130 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 11:14:45,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:14:45 BoogieIcfgContainer [2020-09-25 11:14:45,140 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 11:14:45,141 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 11:14:45,141 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 11:14:45,145 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 11:14:45,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:14:42" (1/3) ... [2020-09-25 11:14:45,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@143f4a5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:14:45, skipping insertion in model container [2020-09-25 11:14:45,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:43" (2/3) ... [2020-09-25 11:14:45,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@143f4a5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:14:45, skipping insertion in model container [2020-09-25 11:14:45,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:14:45" (3/3) ... [2020-09-25 11:14:45,150 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label52.c [2020-09-25 11:14:45,161 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 11:14:45,172 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 11:14:45,194 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 11:14:45,232 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 11:14:45,232 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 11:14:45,233 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 11:14:45,233 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 11:14:45,233 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 11:14:45,233 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 11:14:45,234 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 11:14:45,234 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 11:14:45,268 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-25 11:14:45,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-09-25 11:14:45,292 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:14:45,293 INFO L422 BasicCegarLoop]: 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] [2020-09-25 11:14:45,294 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:14:45,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:14:45,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1583508727, now seen corresponding path program 1 times [2020-09-25 11:14:45,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:14:45,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [989629367] [2020-09-25 11:14:45,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:14:45,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:45,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:45,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:46,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:47,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:47,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:48,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:49,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:50,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:50,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:50,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:50,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-09-25 11:14:50,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 11:14:50,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-09-25 11:14:50,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:50,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:50,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 11:14:50,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 11:14:50,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-09-25 11:14:50,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 11:14:50,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:14:50,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:50,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:50,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:50,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 11:14:50,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:14:50,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-25 11:14:50,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:50,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:50,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:14:50,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:14:50,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 11:14:50,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:14:51,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:14:51,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [989629367] [2020-09-25 11:14:51,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:14:51,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 11:14:51,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700327988] [2020-09-25 11:14:51,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 11:14:51,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:14:51,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 11:14:51,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 11:14:51,045 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 4 states. [2020-09-25 11:14:53,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:14:53,142 INFO L93 Difference]: Finished difference Result 1268 states and 1667 transitions. [2020-09-25 11:14:53,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 11:14:53,145 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 154 [2020-09-25 11:14:53,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:14:53,170 INFO L225 Difference]: With dead ends: 1268 [2020-09-25 11:14:53,170 INFO L226 Difference]: Without dead ends: 694 [2020-09-25 11:14:53,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:14:53,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2020-09-25 11:14:53,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 603. [2020-09-25 11:14:53,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2020-09-25 11:14:53,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 719 transitions. [2020-09-25 11:14:53,287 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 719 transitions. Word has length 154 [2020-09-25 11:14:53,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:14:53,288 INFO L479 AbstractCegarLoop]: Abstraction has 603 states and 719 transitions. [2020-09-25 11:14:53,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 11:14:53,289 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 719 transitions. [2020-09-25 11:14:53,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-09-25 11:14:53,296 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:14:53,297 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:14:53,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 11:14:53,298 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:14:53,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:14:53,298 INFO L82 PathProgramCache]: Analyzing trace with hash -81177825, now seen corresponding path program 1 times [2020-09-25 11:14:53,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:14:53,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692432769] [2020-09-25 11:14:53,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:14:53,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:53,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:53,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:53,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:54,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:55,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:55,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:58,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:58,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-09-25 11:14:58,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 11:14:58,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-09-25 11:14:58,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:58,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:58,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-25 11:14:58,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-25 11:14:58,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-09-25 11:14:58,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:14:59,118 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2020-09-25 11:14:59,348 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 46 [2020-09-25 11:14:59,617 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 49 [2020-09-25 11:14:59,832 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 45 [2020-09-25 11:15:00,038 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 42 [2020-09-25 11:15:00,254 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 38 [2020-09-25 11:15:00,441 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 33 [2020-09-25 11:15:00,591 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 28 [2020-09-25 11:15:00,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:15:00,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:00,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:00,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:00,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 11:15:00,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:15:00,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-09-25 11:15:00,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:00,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:00,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 11:15:00,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:15:00,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 11:15:00,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:15:00,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 11:15:00,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:00,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:00,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:00,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:00,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 11:15:00,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:15:00,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-09-25 11:15:00,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:00,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:00,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:15:00,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 11:15:01,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 11:15:01,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 11:15:01,388 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:15:01,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692432769] [2020-09-25 11:15:01,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:15:01,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-25 11:15:01,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714146880] [2020-09-25 11:15:01,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-25 11:15:01,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:15:01,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-25 11:15:01,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2020-09-25 11:15:01,393 INFO L87 Difference]: Start difference. First operand 603 states and 719 transitions. Second operand 21 states. [2020-09-25 11:15:02,527 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-09-25 11:15:02,817 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-09-25 11:15:03,304 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-09-25 11:15:04,407 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-09-25 11:15:04,685 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-09-25 11:15:06,005 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 118 [2020-09-25 11:15:07,422 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 118 [2020-09-25 11:15:08,085 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 118 [2020-09-25 11:15:08,373 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2020-09-25 11:15:08,916 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 118 [2020-09-25 11:15:10,212 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 118 [2020-09-25 11:15:10,681 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 117 [2020-09-25 11:15:13,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:15:13,544 INFO L93 Difference]: Finished difference Result 2936 states and 4011 transitions. [2020-09-25 11:15:13,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-09-25 11:15:13,544 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 175 [2020-09-25 11:15:13,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:15:13,564 INFO L225 Difference]: With dead ends: 2936 [2020-09-25 11:15:13,564 INFO L226 Difference]: Without dead ends: 2323 [2020-09-25 11:15:13,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=757, Invalid=2549, Unknown=0, NotChecked=0, Total=3306 [2020-09-25 11:15:13,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2323 states. [2020-09-25 11:15:13,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2323 to 2251. [2020-09-25 11:15:13,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2251 states. [2020-09-25 11:15:13,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2251 states to 2251 states and 2783 transitions. [2020-09-25 11:15:13,709 INFO L78 Accepts]: Start accepts. Automaton has 2251 states and 2783 transitions. Word has length 175 [2020-09-25 11:15:13,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:15:13,709 INFO L479 AbstractCegarLoop]: Abstraction has 2251 states and 2783 transitions. [2020-09-25 11:15:13,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-25 11:15:13,710 INFO L276 IsEmpty]: Start isEmpty. Operand 2251 states and 2783 transitions. [2020-09-25 11:15:13,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-09-25 11:15:13,733 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:15:13,734 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:15:13,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 11:15:13,735 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:15:13,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:15:13,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1386970978, now seen corresponding path program 1 times [2020-09-25 11:15:13,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:15:13,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575417480] [2020-09-25 11:15:13,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:15:13,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:13,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:13,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:14,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:18,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:18,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:18,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:18,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-09-25 11:15:18,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 11:15:18,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-25 11:15:18,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:18,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:18,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-25 11:15:18,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-09-25 11:15:18,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-09-25 11:15:18,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:15:19,485 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2020-09-25 11:15:19,633 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2020-09-25 11:15:19,763 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2020-09-25 11:15:20,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:15:20,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:20,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:20,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:20,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 11:15:20,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:15:20,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 11:15:20,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:20,103 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:20,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:15:20,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:15:20,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:15:20,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:15:20,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 11:15:20,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:20,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:20,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:20,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 11:15:20,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:15:20,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-25 11:15:20,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:20,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:20,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:15:20,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:15:20,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 11:15:20,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:15:20,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-25 11:15:20,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:20,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:20,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:20,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:20,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 11:15:20,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:15:20,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-09-25 11:15:20,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:20,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:20,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:15:20,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 11:15:20,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 11:15:20,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:15:20,885 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:15:20,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575417480] [2020-09-25 11:15:20,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:15:20,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-25 11:15:20,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637365548] [2020-09-25 11:15:20,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-25 11:15:20,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:15:20,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-25 11:15:20,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-09-25 11:15:20,890 INFO L87 Difference]: Start difference. First operand 2251 states and 2783 transitions. Second operand 18 states. [2020-09-25 11:15:24,084 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-09-25 11:15:24,531 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-09-25 11:15:24,767 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-09-25 11:15:25,529 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 113 [2020-09-25 11:15:26,425 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 110 [2020-09-25 11:15:27,251 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 107 [2020-09-25 11:15:27,414 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-09-25 11:15:27,745 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 104 [2020-09-25 11:15:28,624 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 99 [2020-09-25 11:15:29,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:15:29,323 INFO L93 Difference]: Finished difference Result 4753 states and 6152 transitions. [2020-09-25 11:15:29,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-25 11:15:29,327 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 192 [2020-09-25 11:15:29,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:15:29,341 INFO L225 Difference]: With dead ends: 4753 [2020-09-25 11:15:29,341 INFO L226 Difference]: Without dead ends: 2667 [2020-09-25 11:15:29,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=430, Invalid=1376, Unknown=0, NotChecked=0, Total=1806 [2020-09-25 11:15:29,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2667 states. [2020-09-25 11:15:29,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2667 to 2615. [2020-09-25 11:15:29,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2615 states. [2020-09-25 11:15:29,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2615 states to 2615 states and 3149 transitions. [2020-09-25 11:15:29,430 INFO L78 Accepts]: Start accepts. Automaton has 2615 states and 3149 transitions. Word has length 192 [2020-09-25 11:15:29,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:15:29,431 INFO L479 AbstractCegarLoop]: Abstraction has 2615 states and 3149 transitions. [2020-09-25 11:15:29,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-25 11:15:29,431 INFO L276 IsEmpty]: Start isEmpty. Operand 2615 states and 3149 transitions. [2020-09-25 11:15:29,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-09-25 11:15:29,441 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:15:29,442 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-25 11:15:29,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 11:15:29,442 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:15:29,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:15:29,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1075803564, now seen corresponding path program 1 times [2020-09-25 11:15:29,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:15:29,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188958843] [2020-09-25 11:15:29,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:15:29,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:29,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:29,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:29,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:30,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:30,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:31,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:33,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking...