/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=LOWLEXORDER --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_label57.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:43:53,183 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:43:53,187 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:43:53,238 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:43:53,239 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:43:53,249 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:43:53,252 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:43:53,256 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:43:53,259 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:43:53,262 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:43:53,264 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:43:53,265 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:43:53,265 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:43:53,268 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:43:53,272 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:43:53,273 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:43:53,275 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:43:53,276 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:43:53,278 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:43:53,286 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:43:53,287 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:43:53,289 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:43:53,290 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:43:53,291 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:43:53,295 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:43:53,295 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:43:53,295 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:43:53,298 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:43:53,299 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:43:53,301 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:43:53,301 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:43:53,302 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:43:53,303 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:43:53,304 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:43:53,305 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:43:53,306 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:43:53,307 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:43:53,307 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:43:53,307 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:43:53,308 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:43:53,310 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:43:53,311 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 21:43:53,355 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:43:53,356 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:43:53,358 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:43:53,358 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:43:53,358 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:43:53,358 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:43:53,359 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:43:53,359 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:43:53,359 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:43:53,359 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:43:53,360 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:43:53,361 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:43:53,361 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:43:53,361 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:43:53,362 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:43:53,362 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:43:53,362 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:43:53,362 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:43:53,363 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:43:53,363 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:43:53,363 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:43:53,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:43:53,363 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:43:53,364 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:43:53,364 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:43:53,364 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:43:53,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:43:53,364 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:43:53,365 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:43:53,365 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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:43:53,804 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:43:53,829 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:43:53,834 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:43:53,837 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:43:53,837 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:43:53,839 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label57.c [2020-09-24 21:43:53,933 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b4b730e24/5d23941b05e84646a661911eaa093c40/FLAG0fdd358f9 [2020-09-24 21:43:54,601 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:43:54,602 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label57.c [2020-09-24 21:43:54,618 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b4b730e24/5d23941b05e84646a661911eaa093c40/FLAG0fdd358f9 [2020-09-24 21:43:54,814 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b4b730e24/5d23941b05e84646a661911eaa093c40 [2020-09-24 21:43:54,827 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:43:54,833 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:43:54,834 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:43:54,834 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:43:54,838 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:43:54,839 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:43:54" (1/1) ... [2020-09-24 21:43:54,844 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55e164ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:54, skipping insertion in model container [2020-09-24 21:43:54,844 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:43:54" (1/1) ... [2020-09-24 21:43:54,853 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:43:54,907 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:43:55,376 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:43:55,382 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:43:55,638 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:43:55,657 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:43:55,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:55 WrapperNode [2020-09-24 21:43:55,658 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:43:55,659 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:43:55,659 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:43:55,659 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:43:55,677 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:55" (1/1) ... [2020-09-24 21:43:55,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:55" (1/1) ... [2020-09-24 21:43:55,710 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:55" (1/1) ... [2020-09-24 21:43:55,711 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:55" (1/1) ... [2020-09-24 21:43:55,755 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:55" (1/1) ... [2020-09-24 21:43:55,773 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:55" (1/1) ... [2020-09-24 21:43:55,779 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:55" (1/1) ... [2020-09-24 21:43:55,788 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:43:55,789 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:43:55,789 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:43:55,789 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:43:55,791 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:55" (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 21:43:55,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:43:55,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:43:55,864 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:43:55,864 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:43:55,864 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:43:55,864 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:43:55,865 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:43:55,865 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:43:55,865 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:43:55,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:43:55,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:43:57,170 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:43:57,171 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:43:57,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:43:57 BoogieIcfgContainer [2020-09-24 21:43:57,180 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:43:57,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:43:57,181 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:43:57,185 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:43:57,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:43:54" (1/3) ... [2020-09-24 21:43:57,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1c64d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:43:57, skipping insertion in model container [2020-09-24 21:43:57,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:55" (2/3) ... [2020-09-24 21:43:57,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1c64d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:43:57, skipping insertion in model container [2020-09-24 21:43:57,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:43:57" (3/3) ... [2020-09-24 21:43:57,192 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label57.c [2020-09-24 21:43:57,204 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:43:57,217 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:43:57,237 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:43:57,272 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:43:57,272 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:43:57,272 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:43:57,273 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:43:57,273 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:43:57,273 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:43:57,273 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:43:57,273 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:43:57,314 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-24 21:43:57,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-09-24 21:43:57,337 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:43:57,339 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] [2020-09-24 21:43:57,339 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:43:57,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:43:57,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1788019222, now seen corresponding path program 1 times [2020-09-24 21:43:57,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:43:57,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400466314] [2020-09-24 21:43:57,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:43:57,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:57,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:57,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:58,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:58,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:59,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:59,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:01,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:01,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:01,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:02,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:02,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:02,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-09-24 21:44:02,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 21:44:02,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-24 21:44:02,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:02,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 21:44:02,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 21:44:02,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 21:44:02,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:44:03,206 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-09-24 21:44:03,337 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2020-09-24 21:44:03,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:44:03,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:03,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:03,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:03,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:44:03,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:44:03,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-09-24 21:44:03,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:03,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:44:03,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:44:03,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:44:03,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:44:04,103 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 21:44:04,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400466314] [2020-09-24 21:44:04,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:44:04,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-09-24 21:44:04,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133722512] [2020-09-24 21:44:04,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:44:04,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:44:04,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:44:04,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:44:04,133 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 16 states. [2020-09-24 21:44:04,716 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-09-24 21:44:05,033 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 98 [2020-09-24 21:44:05,355 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 95 [2020-09-24 21:44:05,743 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-09-24 21:44:06,068 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 80 [2020-09-24 21:44:06,549 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 91 [2020-09-24 21:44:07,776 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 86 [2020-09-24 21:44:08,010 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2020-09-24 21:44:08,355 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-09-24 21:44:08,516 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-09-24 21:44:09,154 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 72 [2020-09-24 21:44:09,622 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 66 [2020-09-24 21:44:09,796 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-09-24 21:44:10,750 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-09-24 21:44:11,170 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-09-24 21:44:13,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:44:13,635 INFO L93 Difference]: Finished difference Result 1869 states and 2661 transitions. [2020-09-24 21:44:13,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-24 21:44:13,638 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 117 [2020-09-24 21:44:13,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:44:13,669 INFO L225 Difference]: With dead ends: 1869 [2020-09-24 21:44:13,670 INFO L226 Difference]: Without dead ends: 1239 [2020-09-24 21:44:13,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=469, Invalid=1171, Unknown=0, NotChecked=0, Total=1640 [2020-09-24 21:44:13,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2020-09-24 21:44:13,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1076. [2020-09-24 21:44:13,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1076 states. [2020-09-24 21:44:13,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 1293 transitions. [2020-09-24 21:44:13,822 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 1293 transitions. Word has length 117 [2020-09-24 21:44:13,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:44:13,823 INFO L479 AbstractCegarLoop]: Abstraction has 1076 states and 1293 transitions. [2020-09-24 21:44:13,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:44:13,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 1293 transitions. [2020-09-24 21:44:13,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-09-24 21:44:13,835 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:44:13,836 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] [2020-09-24 21:44:13,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:44:13,836 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:44:13,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:44:13,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1826679112, now seen corresponding path program 1 times [2020-09-24 21:44:13,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:44:13,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380390220] [2020-09-24 21:44:13,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:44:13,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:13,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:14,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:14,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:15,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:15,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:15,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:16,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:17,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:18,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:18,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:18,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-09-24 21:44:18,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 21:44:18,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-09-24 21:44:18,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:18,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:44:18,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:44:18,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-09-24 21:44:18,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:44:19,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:44:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:19,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:19,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:19,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:44:19,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:44:19,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-09-24 21:44:19,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:19,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:44:19,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:44:19,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:44:19,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:44:19,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:44:19,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:19,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:19,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:19,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:19,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:44:19,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:44:19,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-09-24 21:44:19,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:19,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:44:19,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:44:19,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 21:44:19,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:44:19,966 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:44:19,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380390220] [2020-09-24 21:44:19,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:44:19,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-24 21:44:19,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53872654] [2020-09-24 21:44:19,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-24 21:44:19,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:44:19,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-24 21:44:19,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-09-24 21:44:19,970 INFO L87 Difference]: Start difference. First operand 1076 states and 1293 transitions. Second operand 20 states. [2020-09-24 21:44:20,563 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-09-24 21:44:20,781 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2020-09-24 21:44:21,168 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2020-09-24 21:44:21,480 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-09-24 21:44:21,638 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-09-24 21:44:21,805 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-09-24 21:44:22,824 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-09-24 21:44:23,101 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-09-24 21:44:23,450 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-09-24 21:44:23,712 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-09-24 21:44:25,358 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-09-24 21:44:25,687 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-09-24 21:44:27,052 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-09-24 21:44:27,805 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-09-24 21:44:30,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:44:30,071 INFO L93 Difference]: Finished difference Result 4751 states and 6486 transitions. [2020-09-24 21:44:30,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-24 21:44:30,072 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 139 [2020-09-24 21:44:30,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:44:30,099 INFO L225 Difference]: With dead ends: 4751 [2020-09-24 21:44:30,099 INFO L226 Difference]: Without dead ends: 3755 [2020-09-24 21:44:30,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=910, Invalid=2282, Unknown=0, NotChecked=0, Total=3192 [2020-09-24 21:44:30,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3755 states. [2020-09-24 21:44:30,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3755 to 3529. [2020-09-24 21:44:30,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3529 states. [2020-09-24 21:44:30,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3529 states to 3529 states and 4204 transitions. [2020-09-24 21:44:30,245 INFO L78 Accepts]: Start accepts. Automaton has 3529 states and 4204 transitions. Word has length 139 [2020-09-24 21:44:30,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:44:30,246 INFO L479 AbstractCegarLoop]: Abstraction has 3529 states and 4204 transitions. [2020-09-24 21:44:30,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-24 21:44:30,246 INFO L276 IsEmpty]: Start isEmpty. Operand 3529 states and 4204 transitions. [2020-09-24 21:44:30,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-09-24 21:44:30,258 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:44:30,258 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-24 21:44:30,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:44:30,259 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:44:30,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:44:30,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1339222467, now seen corresponding path program 1 times [2020-09-24 21:44:30,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:44:30,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662388991] [2020-09-24 21:44:30,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:44:30,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:30,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:30,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:30,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:30,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:31,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:32,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:32,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:32,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:33,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:34,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:34,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:34,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:34,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:35,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:35,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:35,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:35,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-09-24 21:44:35,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-09-24 21:44:35,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5056 [2020-09-24 21:44:35,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:35,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 21:44:35,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:44:35,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-09-24 21:44:35,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:44:35,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:44:35,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:35,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:35,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:35,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:44:35,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:44:35,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-09-24 21:44:35,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:35,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:44:35,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:44:35,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:44:35,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:44:35,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:44:35,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:35,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:35,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:35,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:35,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:44:35,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:44:35,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-24 21:44:35,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:35,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:44:35,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:44:35,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:44:35,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:44:35,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-24 21:44:35,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:35,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:35,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:35,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:35,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 21:44:35,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:44:35,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-09-24 21:44:35,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:35,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:44:35,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:44:35,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 21:44:35,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:44:35,987 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-24 21:44:35,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662388991] [2020-09-24 21:44:35,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:44:35,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 21:44:35,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129985879] [2020-09-24 21:44:35,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 21:44:35,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:44:35,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 21:44:35,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-24 21:44:35,991 INFO L87 Difference]: Start difference. First operand 3529 states and 4204 transitions. Second operand 13 states. [2020-09-24 21:44:42,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:44:42,122 INFO L93 Difference]: Finished difference Result 9924 states and 12897 transitions. [2020-09-24 21:44:42,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-24 21:44:42,123 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 152 [2020-09-24 21:44:42,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:44:42,165 INFO L225 Difference]: With dead ends: 9924 [2020-09-24 21:44:42,165 INFO L226 Difference]: Without dead ends: 6125 [2020-09-24 21:44:42,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-09-24 21:44:42,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6125 states. [2020-09-24 21:44:42,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6125 to 5488. [2020-09-24 21:44:42,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5488 states. [2020-09-24 21:44:42,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5488 states to 5488 states and 6803 transitions. [2020-09-24 21:44:42,397 INFO L78 Accepts]: Start accepts. Automaton has 5488 states and 6803 transitions. Word has length 152 [2020-09-24 21:44:42,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:44:42,400 INFO L479 AbstractCegarLoop]: Abstraction has 5488 states and 6803 transitions. [2020-09-24 21:44:42,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 21:44:42,400 INFO L276 IsEmpty]: Start isEmpty. Operand 5488 states and 6803 transitions. [2020-09-24 21:44:42,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-09-24 21:44:42,429 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:44:42,429 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:44:42,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:44:42,430 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:44:42,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:44:42,433 INFO L82 PathProgramCache]: Analyzing trace with hash 330160149, now seen corresponding path program 1 times [2020-09-24 21:44:42,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:44:42,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [483916372] [2020-09-24 21:44:42,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:44:42,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:42,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:42,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:42,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:42,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:43,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking...