/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=BIGGEST --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/Problem02_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 20:32:44,199 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 20:32:44,203 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 20:32:44,247 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 20:32:44,248 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 20:32:44,255 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 20:32:44,258 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 20:32:44,261 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 20:32:44,264 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 20:32:44,267 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 20:32:44,268 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 20:32:44,268 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 20:32:44,269 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 20:32:44,272 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 20:32:44,275 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 20:32:44,276 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 20:32:44,278 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 20:32:44,279 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 20:32:44,280 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 20:32:44,291 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 20:32:44,293 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 20:32:44,294 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 20:32:44,296 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 20:32:44,296 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 20:32:44,308 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 20:32:44,309 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 20:32:44,309 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 20:32:44,315 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 20:32:44,316 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 20:32:44,316 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 20:32:44,317 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 20:32:44,317 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 20:32:44,320 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 20:32:44,321 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 20:32:44,326 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 20:32:44,326 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 20:32:44,329 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 20:32:44,329 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 20:32:44,329 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 20:32:44,330 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 20:32:44,331 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 20:32:44,333 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 [2020-09-24 20:32:44,379 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 20:32:44,381 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 20:32:44,382 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 20:32:44,383 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 20:32:44,383 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 20:32:44,383 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 20:32:44,384 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 20:32:44,384 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 20:32:44,384 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 20:32:44,384 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 20:32:44,385 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 20:32:44,386 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 20:32:44,386 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 20:32:44,386 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 20:32:44,387 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 20:32:44,387 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 20:32:44,387 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 20:32:44,387 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 20:32:44,387 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 20:32:44,388 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 20:32:44,388 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 20:32:44,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 20:32:44,389 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 20:32:44,389 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 20:32:44,389 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 20:32:44,389 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 20:32:44,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 20:32:44,390 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 20:32:44,390 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 20:32:44,390 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true; [2020-09-24 20:32:44,827 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 20:32:44,850 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 20:32:44,854 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 20:32:44,856 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 20:32:44,856 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 20:32:44,858 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label01.c [2020-09-24 20:32:44,942 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fd5c41e8f/14dee33896954193925f74a754a673f1/FLAG112645492 [2020-09-24 20:32:45,568 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 20:32:45,570 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label01.c [2020-09-24 20:32:45,587 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fd5c41e8f/14dee33896954193925f74a754a673f1/FLAG112645492 [2020-09-24 20:32:45,809 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fd5c41e8f/14dee33896954193925f74a754a673f1 [2020-09-24 20:32:45,825 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 20:32:45,831 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 20:32:45,832 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 20:32:45,832 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 20:32:45,838 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 20:32:45,839 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:32:45" (1/1) ... [2020-09-24 20:32:45,843 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30fa97df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:32:45, skipping insertion in model container [2020-09-24 20:32:45,844 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:32:45" (1/1) ... [2020-09-24 20:32:45,852 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 20:32:45,906 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 20:32:46,480 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:32:46,492 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 20:32:46,614 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:32:46,639 INFO L208 MainTranslator]: Completed translation [2020-09-24 20:32:46,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:32:46 WrapperNode [2020-09-24 20:32:46,640 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 20:32:46,641 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 20:32:46,641 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 20:32:46,641 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 20:32:46,655 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:32:46" (1/1) ... [2020-09-24 20:32:46,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:32:46" (1/1) ... [2020-09-24 20:32:46,680 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:32:46" (1/1) ... [2020-09-24 20:32:46,681 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:32:46" (1/1) ... [2020-09-24 20:32:46,730 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:32:46" (1/1) ... [2020-09-24 20:32:46,745 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:32:46" (1/1) ... [2020-09-24 20:32:46,749 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:32:46" (1/1) ... [2020-09-24 20:32:46,756 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 20:32:46,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 20:32:46,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 20:32:46,758 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 20:32:46,759 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:32:46" (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 [2020-09-24 20:32:46,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 20:32:46,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 20:32:46,852 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 20:32:46,852 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 20:32:46,853 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 20:32:46,853 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 20:32:46,853 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 20:32:46,853 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 20:32:46,853 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 20:32:46,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 20:32:46,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 20:32:48,254 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 20:32:48,255 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 20:32:48,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:32:48 BoogieIcfgContainer [2020-09-24 20:32:48,265 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 20:32:48,267 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 20:32:48,267 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 20:32:48,271 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 20:32:48,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 08:32:45" (1/3) ... [2020-09-24 20:32:48,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b7fef3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:32:48, skipping insertion in model container [2020-09-24 20:32:48,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:32:46" (2/3) ... [2020-09-24 20:32:48,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b7fef3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:32:48, skipping insertion in model container [2020-09-24 20:32:48,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:32:48" (3/3) ... [2020-09-24 20:32:48,279 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label01.c [2020-09-24 20:32:48,292 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 20:32:48,304 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 20:32:48,328 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 20:32:48,364 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 20:32:48,364 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 20:32:48,364 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 20:32:48,364 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 20:32:48,364 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 20:32:48,365 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 20:32:48,365 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 20:32:48,365 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 20:32:48,399 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-24 20:32:48,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-09-24 20:32:48,426 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:32:48,428 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] [2020-09-24 20:32:48,429 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:32:48,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:32:48,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1587967458, now seen corresponding path program 1 times [2020-09-24 20:32:48,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:32:48,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584392990] [2020-09-24 20:32:48,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:32:48,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:32:48,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:32:49,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:32:49,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:32:50,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:32:51,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:32:52,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:32:52,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:32:52,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:32:53,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:32:53,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:32:53,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-09-24 20:32:53,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 20:32:53,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-09-24 20:32:53,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:32:53,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-24 20:32:53,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 20:32:53,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-09-24 20:32:53,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 20:32:54,386 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2020-09-24 20:32:54,632 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2020-09-24 20:32:54,924 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 45 [2020-09-24 20:32:55,115 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 41 [2020-09-24 20:32:55,325 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 39 [2020-09-24 20:32:55,489 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 33 [2020-09-24 20:32:55,721 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 32 [2020-09-24 20:32:55,904 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 31 [2020-09-24 20:32:56,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:32:56,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:32:56,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:32:56,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:32:56,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 20:32:56,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:32:56,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-09-24 20:32:56,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:32:56,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 20:32:56,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:32:56,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 20:32:56,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:32:56,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:32:56,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584392990] [2020-09-24 20:32:56,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:32:56,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-09-24 20:32:56,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614360079] [2020-09-24 20:32:56,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-24 20:32:56,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:32:56,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-24 20:32:56,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2020-09-24 20:32:56,859 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 20 states. [2020-09-24 20:32:57,900 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 103 [2020-09-24 20:32:58,320 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 103 [2020-09-24 20:32:58,706 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 104 [2020-09-24 20:32:59,172 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2020-09-24 20:32:59,713 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 104 [2020-09-24 20:33:00,219 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 86 [2020-09-24 20:33:00,576 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 104 [2020-09-24 20:33:00,896 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 103 [2020-09-24 20:33:01,150 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-09-24 20:33:01,522 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 103 [2020-09-24 20:33:01,755 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-09-24 20:33:01,969 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-09-24 20:33:02,247 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-09-24 20:33:03,245 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 102 [2020-09-24 20:33:03,504 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-09-24 20:33:04,199 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 101 [2020-09-24 20:33:04,727 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 86 [2020-09-24 20:33:05,215 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2020-09-24 20:33:05,564 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-09-24 20:33:06,051 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 88 [2020-09-24 20:33:06,392 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2020-09-24 20:33:06,838 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2020-09-24 20:33:07,140 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2020-09-24 20:33:07,319 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-09-24 20:33:07,502 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-09-24 20:33:08,655 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-09-24 20:33:10,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:33:10,204 INFO L93 Difference]: Finished difference Result 1674 states and 2354 transitions. [2020-09-24 20:33:10,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-24 20:33:10,206 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 139 [2020-09-24 20:33:10,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:33:10,236 INFO L225 Difference]: With dead ends: 1674 [2020-09-24 20:33:10,236 INFO L226 Difference]: Without dead ends: 1036 [2020-09-24 20:33:10,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1017 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=943, Invalid=2479, Unknown=0, NotChecked=0, Total=3422 [2020-09-24 20:33:10,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2020-09-24 20:33:10,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 960. [2020-09-24 20:33:10,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 960 states. [2020-09-24 20:33:10,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 1135 transitions. [2020-09-24 20:33:10,387 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 1135 transitions. Word has length 139 [2020-09-24 20:33:10,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:33:10,388 INFO L479 AbstractCegarLoop]: Abstraction has 960 states and 1135 transitions. [2020-09-24 20:33:10,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-24 20:33:10,388 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 1135 transitions. [2020-09-24 20:33:10,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-09-24 20:33:10,401 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:33:10,402 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:33:10,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 20:33:10,402 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:33:10,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:33:10,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1311090429, now seen corresponding path program 1 times [2020-09-24 20:33:10,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:33:10,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783262592] [2020-09-24 20:33:10,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:33:10,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:33:10,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:33:10,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:33:10,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:33:11,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:33:12,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:33:13,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:33:14,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:33:14,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:33:14,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:33:15,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:33:15,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:33:15,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-09-24 20:33:15,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 20:33:15,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5079 [2020-09-24 20:33:15,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:33:15,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-09-24 20:33:15,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 20:33:15,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-09-24 20:33:15,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:33:16,122 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 37 [2020-09-24 20:33:16,286 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 37 [2020-09-24 20:33:16,449 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 36 [2020-09-24 20:33:16,613 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 36 [2020-09-24 20:33:16,766 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 33 [2020-09-24 20:33:16,916 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 33 [2020-09-24 20:33:17,069 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 34 [2020-09-24 20:33:17,228 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 32 [2020-09-24 20:33:17,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:33:17,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:33:17,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:33:17,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:33:17,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 20:33:17,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:33:17,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-09-24 20:33:17,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:33:17,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 20:33:17,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:33:17,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 20:33:17,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:33:17,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 20:33:17,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:33:17,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:33:17,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:33:17,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:33:17,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 20:33:17,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 20:33:17,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-09-24 20:33:17,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:33:17,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 20:33:17,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 20:33:17,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-24 20:33:17,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:33:18,055 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:33:18,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783262592] [2020-09-24 20:33:18,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:33:18,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-24 20:33:18,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017874402] [2020-09-24 20:33:18,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-24 20:33:18,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:33:18,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-24 20:33:18,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2020-09-24 20:33:18,060 INFO L87 Difference]: Start difference. First operand 960 states and 1135 transitions. Second operand 24 states. [2020-09-24 20:33:18,407 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-09-24 20:33:18,678 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 78 [2020-09-24 20:33:19,284 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2020-09-24 20:33:19,531 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2020-09-24 20:33:19,883 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 84 [2020-09-24 20:33:20,132 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2020-09-24 20:33:20,595 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 84 [2020-09-24 20:33:21,027 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2020-09-24 20:33:21,696 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2020-09-24 20:33:22,468 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 85 [2020-09-24 20:33:22,684 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2020-09-24 20:33:22,901 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2020-09-24 20:33:23,183 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2020-09-24 20:33:23,664 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 85 [2020-09-24 20:33:24,041 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2020-09-24 20:33:24,244 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2020-09-24 20:33:24,383 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-09-24 20:33:24,752 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2020-09-24 20:33:25,807 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 83 [2020-09-24 20:33:27,703 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2020-09-24 20:33:29,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:33:29,243 INFO L93 Difference]: Finished difference Result 2930 states and 3798 transitions. [2020-09-24 20:33:29,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-24 20:33:29,244 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 163 [2020-09-24 20:33:29,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:33:29,262 INFO L225 Difference]: With dead ends: 2930 [2020-09-24 20:33:29,262 INFO L226 Difference]: Without dead ends: 1831 [2020-09-24 20:33:29,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=952, Invalid=2354, Unknown=0, NotChecked=0, Total=3306 [2020-09-24 20:33:29,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2020-09-24 20:33:29,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1705. [2020-09-24 20:33:29,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1705 states. [2020-09-24 20:33:29,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 2081 transitions. [2020-09-24 20:33:29,380 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 2081 transitions. Word has length 163 [2020-09-24 20:33:29,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:33:29,383 INFO L479 AbstractCegarLoop]: Abstraction has 1705 states and 2081 transitions. [2020-09-24 20:33:29,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-24 20:33:29,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 2081 transitions. [2020-09-24 20:33:29,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-09-24 20:33:29,393 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:33:29,393 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:33:29,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 20:33:29,394 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:33:29,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:33:29,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1889998438, now seen corresponding path program 1 times [2020-09-24 20:33:29,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:33:29,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161655095] [2020-09-24 20:33:29,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:33:29,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:33:29,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:33:29,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:33:29,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:33:29,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:33:30,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:33:31,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:33:34,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:33:34,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-09-24 20:33:34,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 20:33:34,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-09-24 20:33:34,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:33:34,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 20:33:34,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-09-24 20:33:34,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-09-24 20:33:34,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-09-24 20:33:34,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:33:34,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:33:34,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:33:34,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:33:34,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 20:33:34,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:33:34,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 20:33:34,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:33:34,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:33:34,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:33:34,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:33:34,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:33:34,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 20:33:34,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:33:34,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:33:34,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:33:34,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-24 20:33:34,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:33:34,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-09-24 20:33:34,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:33:34,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 20:33:34,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:33:34,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-24 20:33:34,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:33:35,210 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:33:35,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161655095] [2020-09-24 20:33:35,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:33:35,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 20:33:35,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015282196] [2020-09-24 20:33:35,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 20:33:35,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:33:35,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 20:33:35,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-09-24 20:33:35,215 INFO L87 Difference]: Start difference. First operand 1705 states and 2081 transitions. Second operand 10 states. [2020-09-24 20:33:38,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:33:38,499 INFO L93 Difference]: Finished difference Result 2826 states and 3598 transitions. [2020-09-24 20:33:38,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 20:33:38,501 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 177 [2020-09-24 20:33:38,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:33:38,509 INFO L225 Difference]: With dead ends: 2826 [2020-09-24 20:33:38,510 INFO L226 Difference]: Without dead ends: 1385 [2020-09-24 20:33:38,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2020-09-24 20:33:38,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2020-09-24 20:33:38,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 1226. [2020-09-24 20:33:38,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1226 states. [2020-09-24 20:33:38,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1398 transitions. [2020-09-24 20:33:38,550 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 1398 transitions. Word has length 177 [2020-09-24 20:33:38,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:33:38,550 INFO L479 AbstractCegarLoop]: Abstraction has 1226 states and 1398 transitions. [2020-09-24 20:33:38,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 20:33:38,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 1398 transitions. [2020-09-24 20:33:38,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-09-24 20:33:38,555 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:33:38,556 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:33:38,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 20:33:38,556 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:33:38,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:33:38,557 INFO L82 PathProgramCache]: Analyzing trace with hash -378615506, now seen corresponding path program 1 times [2020-09-24 20:33:38,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:33:38,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [849919964] [2020-09-24 20:33:38,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:33:38,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:33:38,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:33:38,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:33:38,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:33:38,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking...