/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 --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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label41.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:28:11,347 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:28:11,351 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:28:11,377 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:28:11,377 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:28:11,379 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:28:11,380 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:28:11,382 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:28:11,384 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:28:11,385 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:28:11,386 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:28:11,387 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:28:11,387 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:28:11,389 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:28:11,390 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:28:11,391 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:28:11,392 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:28:11,393 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:28:11,395 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:28:11,397 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:28:11,398 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:28:11,401 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:28:11,402 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:28:11,404 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:28:11,407 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:28:11,408 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:28:11,410 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:28:11,413 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:28:11,414 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:28:11,415 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:28:11,416 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:28:11,417 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:28:11,417 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:28:11,418 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:28:11,420 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:28:11,420 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:28:11,421 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:28:11,421 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:28:11,422 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:28:11,423 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:28:11,425 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:28:11,426 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 [2020-09-21 12:28:11,491 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:28:11,491 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:28:11,493 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:28:11,493 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:28:11,493 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:28:11,494 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:28:11,494 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:28:11,494 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:28:11,494 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:28:11,494 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:28:11,495 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:28:11,495 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:28:11,495 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:28:11,495 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:28:11,495 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:28:11,496 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:28:11,496 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:28:11,496 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:28:11,496 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:28:11,496 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:28:11,497 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:28:11,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:28:11,497 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:28:11,497 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:28:11,497 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:28:11,498 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:28:11,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:28:11,498 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:28:11,498 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:28:11,498 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.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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-21 12:28:11,969 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:28:11,986 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:28:11,991 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:28:11,993 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:28:11,993 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:28:11,995 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label41.c [2020-09-21 12:28:12,084 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b91ae22b3/d6d9ae9cd8e74489b7fed49aa20df89d/FLAGe56fe45d1 [2020-09-21 12:28:12,752 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:28:12,753 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label41.c [2020-09-21 12:28:12,766 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b91ae22b3/d6d9ae9cd8e74489b7fed49aa20df89d/FLAGe56fe45d1 [2020-09-21 12:28:12,974 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b91ae22b3/d6d9ae9cd8e74489b7fed49aa20df89d [2020-09-21 12:28:12,988 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:28:12,995 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:28:12,996 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:28:12,996 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:28:13,001 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:28:13,002 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:28:12" (1/1) ... [2020-09-21 12:28:13,008 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69c7438f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:28:13, skipping insertion in model container [2020-09-21 12:28:13,009 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:28:12" (1/1) ... [2020-09-21 12:28:13,018 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:28:13,073 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:28:13,559 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:28:13,567 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:28:13,792 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:28:13,813 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:28:13,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:28:13 WrapperNode [2020-09-21 12:28:13,813 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:28:13,814 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:28:13,815 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:28:13,815 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:28:13,831 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:28:13" (1/1) ... [2020-09-21 12:28:13,831 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:28:13" (1/1) ... [2020-09-21 12:28:13,851 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:28:13" (1/1) ... [2020-09-21 12:28:13,852 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:28:13" (1/1) ... [2020-09-21 12:28:13,896 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:28:13" (1/1) ... [2020-09-21 12:28:13,914 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:28:13" (1/1) ... [2020-09-21 12:28:13,927 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:28:13" (1/1) ... [2020-09-21 12:28:13,935 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:28:13,937 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:28:13,938 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:28:13,938 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:28:13,939 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:28:13" (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 [2020-09-21 12:28:14,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:28:14,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:28:14,043 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-21 12:28:14,043 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:28:14,044 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-21 12:28:14,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:28:14,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 12:28:14,044 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-21 12:28:14,045 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:28:14,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:28:14,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:28:15,322 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:28:15,322 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 12:28:15,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:28:15 BoogieIcfgContainer [2020-09-21 12:28:15,335 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:28:15,339 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:28:15,339 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:28:15,343 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:28:15,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:28:12" (1/3) ... [2020-09-21 12:28:15,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32764847 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:28:15, skipping insertion in model container [2020-09-21 12:28:15,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:28:13" (2/3) ... [2020-09-21 12:28:15,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32764847 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:28:15, skipping insertion in model container [2020-09-21 12:28:15,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:28:15" (3/3) ... [2020-09-21 12:28:15,350 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label41.c [2020-09-21 12:28:15,363 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:28:15,377 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:28:15,401 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:28:15,446 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:28:15,447 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:28:15,447 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:28:15,447 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:28:15,447 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:28:15,448 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:28:15,448 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:28:15,448 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:28:15,479 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2020-09-21 12:28:15,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-09-21 12:28:15,493 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:28:15,495 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] [2020-09-21 12:28:15,495 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:28:15,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:28:15,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1692915649, now seen corresponding path program 1 times [2020-09-21 12:28:15,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:28:15,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000059577] [2020-09-21 12:28:15,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:28:15,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:15,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:16,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:16,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:16,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-09-21 12:28:16,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:28:16,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1004 [2020-09-21 12:28:16,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:16,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:28:16,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 12:28:16,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-09-21 12:28:16,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-21 12:28:17,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:28:17,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:17,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:17,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:17,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:28:17,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:17,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-21 12:28:17,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:17,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:28:17,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:28:17,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-21 12:28:17,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:28:17,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:28:17,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000059577] [2020-09-21 12:28:17,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:28:17,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:28:17,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213352442] [2020-09-21 12:28:17,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:28:17,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:28:17,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:28:17,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:28:17,219 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 4 states. [2020-09-21 12:28:18,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:28:18,755 INFO L93 Difference]: Finished difference Result 557 states and 956 transitions. [2020-09-21 12:28:18,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:28:18,757 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2020-09-21 12:28:18,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:28:18,788 INFO L225 Difference]: With dead ends: 557 [2020-09-21 12:28:18,788 INFO L226 Difference]: Without dead ends: 286 [2020-09-21 12:28:18,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:28:18,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-09-21 12:28:18,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 280. [2020-09-21 12:28:18,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-09-21 12:28:18,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 402 transitions. [2020-09-21 12:28:18,879 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 402 transitions. Word has length 91 [2020-09-21 12:28:18,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:28:18,880 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 402 transitions. [2020-09-21 12:28:18,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:28:18,880 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 402 transitions. [2020-09-21 12:28:18,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-09-21 12:28:18,886 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:28:18,886 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-21 12:28:18,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:28:18,887 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:28:18,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:28:18,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1768869960, now seen corresponding path program 1 times [2020-09-21 12:28:18,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:28:18,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934509635] [2020-09-21 12:28:18,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:28:18,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:18,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:19,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:19,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:19,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-09-21 12:28:19,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:28:19,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1017 [2020-09-21 12:28:19,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:19,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:28:19,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-21 12:28:19,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-09-21 12:28:19,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:28:20,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:28:20,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:20,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:20,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:20,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:28:20,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:20,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-21 12:28:20,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:20,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:28:20,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:28:20,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:28:20,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:28:20,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 12:28:20,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:20,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:20,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:20,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-21 12:28:20,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:20,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-21 12:28:20,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:20,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:28:20,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:28:20,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 12:28:20,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:28:20,174 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:28:20,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934509635] [2020-09-21 12:28:20,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:28:20,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 12:28:20,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111572969] [2020-09-21 12:28:20,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:28:20,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:28:20,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:28:20,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:28:20,179 INFO L87 Difference]: Start difference. First operand 280 states and 402 transitions. Second operand 5 states. [2020-09-21 12:28:21,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:28:21,532 INFO L93 Difference]: Finished difference Result 834 states and 1221 transitions. [2020-09-21 12:28:21,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:28:21,534 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 101 [2020-09-21 12:28:21,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:28:21,544 INFO L225 Difference]: With dead ends: 834 [2020-09-21 12:28:21,544 INFO L226 Difference]: Without dead ends: 560 [2020-09-21 12:28:21,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:28:21,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2020-09-21 12:28:21,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 556. [2020-09-21 12:28:21,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2020-09-21 12:28:21,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 731 transitions. [2020-09-21 12:28:21,600 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 731 transitions. Word has length 101 [2020-09-21 12:28:21,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:28:21,600 INFO L479 AbstractCegarLoop]: Abstraction has 556 states and 731 transitions. [2020-09-21 12:28:21,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:28:21,600 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 731 transitions. [2020-09-21 12:28:21,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-09-21 12:28:21,607 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:28:21,607 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] [2020-09-21 12:28:21,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:28:21,608 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:28:21,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:28:21,608 INFO L82 PathProgramCache]: Analyzing trace with hash -241000616, now seen corresponding path program 1 times [2020-09-21 12:28:21,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:28:21,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830403705] [2020-09-21 12:28:21,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:28:21,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:21,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:21,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:22,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:22,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-09-21 12:28:22,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:28:22,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1020 [2020-09-21 12:28:22,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:22,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:28:22,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 12:28:22,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-21 12:28:22,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:28:22,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:28:22,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:22,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:22,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:22,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:28:22,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:22,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-21 12:28:22,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:22,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:28:22,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:28:22,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-21 12:28:22,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:28:22,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 12:28:22,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:22,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:22,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:22,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-21 12:28:22,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:22,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-09-21 12:28:22,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:22,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:28:22,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-21 12:28:22,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-21 12:28:22,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:28:22,947 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:28:22,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830403705] [2020-09-21 12:28:22,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:28:22,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 12:28:22,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482218702] [2020-09-21 12:28:22,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 12:28:22,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:28:22,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 12:28:22,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:28:22,954 INFO L87 Difference]: Start difference. First operand 556 states and 731 transitions. Second operand 7 states. [2020-09-21 12:28:24,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:28:24,369 INFO L93 Difference]: Finished difference Result 1690 states and 2316 transitions. [2020-09-21 12:28:24,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 12:28:24,370 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 109 [2020-09-21 12:28:24,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:28:24,378 INFO L225 Difference]: With dead ends: 1690 [2020-09-21 12:28:24,379 INFO L226 Difference]: Without dead ends: 1140 [2020-09-21 12:28:24,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-21 12:28:24,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2020-09-21 12:28:24,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 1118. [2020-09-21 12:28:24,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1118 states. [2020-09-21 12:28:24,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 1454 transitions. [2020-09-21 12:28:24,431 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 1454 transitions. Word has length 109 [2020-09-21 12:28:24,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:28:24,432 INFO L479 AbstractCegarLoop]: Abstraction has 1118 states and 1454 transitions. [2020-09-21 12:28:24,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 12:28:24,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 1454 transitions. [2020-09-21 12:28:24,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-09-21 12:28:24,441 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:28:24,442 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:28:24,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:28:24,442 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:28:24,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:28:24,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1868751585, now seen corresponding path program 1 times [2020-09-21 12:28:24,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:28:24,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414198219] [2020-09-21 12:28:24,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:28:24,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:24,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:24,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:24,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:25,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:25,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-09-21 12:28:25,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:28:25,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1019 [2020-09-21 12:28:25,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:25,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:28:25,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-21 12:28:25,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-21 12:28:25,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:28:25,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:28:25,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:25,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:25,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:25,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:28:25,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:25,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-21 12:28:25,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:25,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:28:25,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:28:25,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:28:25,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:28:25,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 12:28:25,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:25,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:25,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:25,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-21 12:28:25,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:25,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-21 12:28:25,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:25,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:28:25,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:28:25,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:28:25,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:28:25,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-21 12:28:25,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:25,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:25,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:25,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-21 12:28:25,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:25,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-09-21 12:28:25,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:25,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:28:25,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-21 12:28:25,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-21 12:28:25,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:28:25,781 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 12:28:25,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414198219] [2020-09-21 12:28:25,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:28:25,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 12:28:25,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465819012] [2020-09-21 12:28:25,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 12:28:25,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:28:25,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 12:28:25,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:28:25,784 INFO L87 Difference]: Start difference. First operand 1118 states and 1454 transitions. Second operand 7 states. [2020-09-21 12:28:27,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:28:27,161 INFO L93 Difference]: Finished difference Result 2546 states and 3469 transitions. [2020-09-21 12:28:27,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 12:28:27,162 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 120 [2020-09-21 12:28:27,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:28:27,173 INFO L225 Difference]: With dead ends: 2546 [2020-09-21 12:28:27,173 INFO L226 Difference]: Without dead ends: 1434 [2020-09-21 12:28:27,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-21 12:28:27,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1434 states. [2020-09-21 12:28:27,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1434 to 1120. [2020-09-21 12:28:27,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1120 states. [2020-09-21 12:28:27,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1496 transitions. [2020-09-21 12:28:27,244 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1496 transitions. Word has length 120 [2020-09-21 12:28:27,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:28:27,244 INFO L479 AbstractCegarLoop]: Abstraction has 1120 states and 1496 transitions. [2020-09-21 12:28:27,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 12:28:27,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1496 transitions. [2020-09-21 12:28:27,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-09-21 12:28:27,249 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:28:27,250 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-21 12:28:27,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 12:28:27,250 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:28:27,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:28:27,251 INFO L82 PathProgramCache]: Analyzing trace with hash 993606914, now seen corresponding path program 1 times [2020-09-21 12:28:27,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:28:27,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482080884] [2020-09-21 12:28:27,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:28:27,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:27,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:27,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:27,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:28,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:28,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-09-21 12:28:28,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:28:28,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1017 [2020-09-21 12:28:28,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:28,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:28:28,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-21 12:28:28,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-21 12:28:28,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:28:28,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:28:28,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:28,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:28,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:28,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:28:28,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:28,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-21 12:28:28,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:28,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:28:28,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:28:28,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:28:28,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:28:28,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 12:28:28,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:28,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:28,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:28,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:28:28,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:28,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-21 12:28:28,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:28,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:28:28,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:28:28,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-21 12:28:28,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:28:28,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 12:28:28,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:28,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:28,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:28,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-21 12:28:28,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:28,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-09-21 12:28:28,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:28,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:28:28,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-21 12:28:28,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 12:28:28,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-21 12:28:28,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-09-21 12:28:28,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:28,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:28,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:28,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-21 12:28:28,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:28,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-09-21 12:28:28,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:28,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:28:28,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-21 12:28:28,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:28:28,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:28:28,755 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 41 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-21 12:28:28,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482080884] [2020-09-21 12:28:28,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:28:28,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 12:28:28,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801906603] [2020-09-21 12:28:28,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 12:28:28,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:28:28,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 12:28:28,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:28:28,759 INFO L87 Difference]: Start difference. First operand 1120 states and 1496 transitions. Second operand 7 states. [2020-09-21 12:28:30,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:28:30,198 INFO L93 Difference]: Finished difference Result 2804 states and 3774 transitions. [2020-09-21 12:28:30,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 12:28:30,199 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 132 [2020-09-21 12:28:30,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:28:30,209 INFO L225 Difference]: With dead ends: 2804 [2020-09-21 12:28:30,209 INFO L226 Difference]: Without dead ends: 1690 [2020-09-21 12:28:30,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-21 12:28:30,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1690 states. [2020-09-21 12:28:30,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1690 to 1271. [2020-09-21 12:28:30,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1271 states. [2020-09-21 12:28:30,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 1696 transitions. [2020-09-21 12:28:30,266 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 1696 transitions. Word has length 132 [2020-09-21 12:28:30,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:28:30,267 INFO L479 AbstractCegarLoop]: Abstraction has 1271 states and 1696 transitions. [2020-09-21 12:28:30,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 12:28:30,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 1696 transitions. [2020-09-21 12:28:30,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-09-21 12:28:30,272 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:28:30,273 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2020-09-21 12:28:30,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 12:28:30,273 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:28:30,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:28:30,273 INFO L82 PathProgramCache]: Analyzing trace with hash -987242687, now seen corresponding path program 1 times [2020-09-21 12:28:30,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:28:30,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435353799] [2020-09-21 12:28:30,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:28:30,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:30,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:30,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:30,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:31,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:31,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-09-21 12:28:31,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:28:31,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1027 [2020-09-21 12:28:31,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:31,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:28:31,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-09-21 12:28:31,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-21 12:28:31,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:28:31,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:28:31,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:31,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:31,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:31,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:28:31,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:31,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-21 12:28:31,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:31,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:28:31,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:28:31,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:28:31,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:28:31,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 12:28:31,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:31,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:31,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:31,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:28:31,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:31,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-21 12:28:31,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:31,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:28:31,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:28:31,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:28:31,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:28:31,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 12:28:31,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:31,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:31,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:31,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-21 12:28:31,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:31,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-21 12:28:31,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:31,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:28:31,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:28:31,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:28:31,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:28:31,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-21 12:28:31,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:31,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:31,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:31,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-21 12:28:31,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:31,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-09-21 12:28:31,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:31,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:28:31,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:28:31,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 12:28:31,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:28:31,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-21 12:28:31,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:31,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:31,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:31,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-21 12:28:31,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:31,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-09-21 12:28:31,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:31,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:28:31,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-21 12:28:31,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-21 12:28:31,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:28:31,805 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 79 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-09-21 12:28:31,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435353799] [2020-09-21 12:28:31,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:28:31,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 12:28:31,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780648784] [2020-09-21 12:28:31,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 12:28:31,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:28:31,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 12:28:31,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:28:31,809 INFO L87 Difference]: Start difference. First operand 1271 states and 1696 transitions. Second operand 8 states. [2020-09-21 12:28:33,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:28:33,522 INFO L93 Difference]: Finished difference Result 3124 states and 4243 transitions. [2020-09-21 12:28:33,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 12:28:33,524 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 145 [2020-09-21 12:28:33,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:28:33,541 INFO L225 Difference]: With dead ends: 3124 [2020-09-21 12:28:33,541 INFO L226 Difference]: Without dead ends: 1859 [2020-09-21 12:28:33,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-21 12:28:33,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1859 states. [2020-09-21 12:28:33,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1859 to 1708. [2020-09-21 12:28:33,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1708 states. [2020-09-21 12:28:33,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 2269 transitions. [2020-09-21 12:28:33,624 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 2269 transitions. Word has length 145 [2020-09-21 12:28:33,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:28:33,626 INFO L479 AbstractCegarLoop]: Abstraction has 1708 states and 2269 transitions. [2020-09-21 12:28:33,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 12:28:33,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 2269 transitions. [2020-09-21 12:28:33,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-09-21 12:28:33,636 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:28:33,636 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-21 12:28:33,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 12:28:33,637 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:28:33,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:28:33,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1103385234, now seen corresponding path program 1 times [2020-09-21 12:28:33,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:28:33,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410744521] [2020-09-21 12:28:33,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:28:33,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:33,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:33,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:34,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:34,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:34,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-09-21 12:28:34,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:28:34,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1018 [2020-09-21 12:28:34,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:34,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:28:34,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-09-21 12:28:34,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-21 12:28:34,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:28:34,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:28:34,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:34,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:34,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:34,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:28:34,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:34,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 12:28:34,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:34,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:28:34,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:28:34,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:28:34,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:28:34,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 12:28:34,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:34,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:34,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:34,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-21 12:28:34,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:34,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-09-21 12:28:34,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:34,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:28:34,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:28:34,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-21 12:28:34,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:28:34,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-21 12:28:34,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:34,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:34,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:34,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-21 12:28:34,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:34,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-09-21 12:28:34,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:34,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:28:34,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-21 12:28:34,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 12:28:34,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:28:34,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-21 12:28:34,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:34,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:34,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:34,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-21 12:28:34,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:34,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-21 12:28:34,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:34,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:28:34,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-21 12:28:34,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:28:34,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:28:35,019 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 84 proven. 14 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-09-21 12:28:35,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410744521] [2020-09-21 12:28:35,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:28:35,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 12:28:35,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051098931] [2020-09-21 12:28:35,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 12:28:35,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:28:35,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 12:28:35,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:28:35,022 INFO L87 Difference]: Start difference. First operand 1708 states and 2269 transitions. Second operand 7 states. [2020-09-21 12:28:36,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:28:36,730 INFO L93 Difference]: Finished difference Result 3897 states and 5567 transitions. [2020-09-21 12:28:36,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 12:28:36,731 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 168 [2020-09-21 12:28:36,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:28:36,746 INFO L225 Difference]: With dead ends: 3897 [2020-09-21 12:28:36,746 INFO L226 Difference]: Without dead ends: 2195 [2020-09-21 12:28:36,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-21 12:28:36,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2195 states. [2020-09-21 12:28:36,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2195 to 2125. [2020-09-21 12:28:36,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2125 states. [2020-09-21 12:28:36,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2125 states to 2125 states and 2700 transitions. [2020-09-21 12:28:36,824 INFO L78 Accepts]: Start accepts. Automaton has 2125 states and 2700 transitions. Word has length 168 [2020-09-21 12:28:36,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:28:36,824 INFO L479 AbstractCegarLoop]: Abstraction has 2125 states and 2700 transitions. [2020-09-21 12:28:36,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 12:28:36,825 INFO L276 IsEmpty]: Start isEmpty. Operand 2125 states and 2700 transitions. [2020-09-21 12:28:36,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-09-21 12:28:36,831 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:28:36,832 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-21 12:28:36,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 12:28:36,832 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:28:36,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:28:36,833 INFO L82 PathProgramCache]: Analyzing trace with hash 740758918, now seen corresponding path program 1 times [2020-09-21 12:28:36,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:28:36,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197131770] [2020-09-21 12:28:36,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:28:36,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:36,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:37,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:37,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:37,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 222 [2020-09-21 12:28:37,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:28:37,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 999 [2020-09-21 12:28:37,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:37,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:28:37,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 131 [2020-09-21 12:28:37,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-09-21 12:28:37,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:28:38,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:28:38,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:38,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:38,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:38,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:28:38,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:38,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-21 12:28:38,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:38,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:28:38,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:28:38,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:28:38,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:28:38,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 12:28:38,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:38,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:38,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:38,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:28:38,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:38,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-21 12:28:38,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:38,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:28:38,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:28:38,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:28:38,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:28:38,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 12:28:38,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:38,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:38,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:38,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-21 12:28:38,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:38,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-09-21 12:28:38,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:38,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:28:38,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:28:38,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:28:38,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:28:38,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-09-21 12:28:38,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:38,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:38,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:38,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-21 12:28:38,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:38,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-09-21 12:28:38,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:38,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:28:38,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:28:38,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-09-21 12:28:38,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:28:38,418 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 110 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-09-21 12:28:38,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197131770] [2020-09-21 12:28:38,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:28:38,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 12:28:38,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152574490] [2020-09-21 12:28:38,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:28:38,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:28:38,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:28:38,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:28:38,420 INFO L87 Difference]: Start difference. First operand 2125 states and 2700 transitions. Second operand 5 states. [2020-09-21 12:28:39,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:28:39,850 INFO L93 Difference]: Finished difference Result 4657 states and 5984 transitions. [2020-09-21 12:28:39,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:28:39,855 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 207 [2020-09-21 12:28:39,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:28:39,868 INFO L225 Difference]: With dead ends: 4657 [2020-09-21 12:28:39,869 INFO L226 Difference]: Without dead ends: 2538 [2020-09-21 12:28:39,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:28:39,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2538 states. [2020-09-21 12:28:39,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2538 to 2401. [2020-09-21 12:28:39,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2401 states. [2020-09-21 12:28:39,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2401 states to 2401 states and 2959 transitions. [2020-09-21 12:28:39,947 INFO L78 Accepts]: Start accepts. Automaton has 2401 states and 2959 transitions. Word has length 207 [2020-09-21 12:28:39,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:28:39,949 INFO L479 AbstractCegarLoop]: Abstraction has 2401 states and 2959 transitions. [2020-09-21 12:28:39,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:28:39,950 INFO L276 IsEmpty]: Start isEmpty. Operand 2401 states and 2959 transitions. [2020-09-21 12:28:39,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-09-21 12:28:39,959 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:28:39,959 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2020-09-21 12:28:39,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 12:28:39,959 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:28:39,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:28:39,960 INFO L82 PathProgramCache]: Analyzing trace with hash 453280184, now seen corresponding path program 1 times [2020-09-21 12:28:39,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:28:39,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719385940] [2020-09-21 12:28:39,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:28:40,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:40,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:40,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:41,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:41,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 273 [2020-09-21 12:28:41,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:28:41,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1011 [2020-09-21 12:28:41,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:41,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:28:41,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 162 [2020-09-21 12:28:41,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-21 12:28:41,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:28:41,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:28:41,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:41,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:41,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:41,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:28:41,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:41,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-21 12:28:41,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:41,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:28:41,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:28:41,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:28:41,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:28:41,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 12:28:41,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:41,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:41,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:41,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:28:41,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:41,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 12:28:41,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:41,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:28:41,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:28:41,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:28:41,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:28:41,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 12:28:41,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:41,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:41,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:41,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-21 12:28:41,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:41,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-09-21 12:28:41,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:41,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:28:41,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:28:41,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:28:41,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:28:41,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-09-21 12:28:41,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:41,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:41,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:41,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 12:28:41,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:41,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-21 12:28:41,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:41,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:28:41,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:28:41,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:28:41,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:28:41,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-09-21 12:28:41,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:41,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:41,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:41,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-21 12:28:41,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:41,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-21 12:28:41,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:41,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:28:41,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:28:41,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:28:41,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:28:41,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-09-21 12:28:41,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:41,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:41,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:41,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-21 12:28:41,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:41,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-21 12:28:41,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:41,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:28:41,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:28:41,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:28:41,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:28:41,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2020-09-21 12:28:41,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:41,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:41,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:41,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-21 12:28:41,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:41,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-09-21 12:28:41,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:41,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:28:41,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:28:41,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-21 12:28:41,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:28:41,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2020-09-21 12:28:41,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:41,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:41,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:41,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-21 12:28:41,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:41,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-09-21 12:28:41,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:41,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:28:41,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-21 12:28:41,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-21 12:28:41,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:28:41,658 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 235 proven. 2 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2020-09-21 12:28:41,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719385940] [2020-09-21 12:28:41,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:28:41,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 12:28:41,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989258146] [2020-09-21 12:28:41,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 12:28:41,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:28:41,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 12:28:41,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:28:41,669 INFO L87 Difference]: Start difference. First operand 2401 states and 2959 transitions. Second operand 7 states. [2020-09-21 12:28:43,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:28:43,377 INFO L93 Difference]: Finished difference Result 4733 states and 6093 transitions. [2020-09-21 12:28:43,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 12:28:43,378 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 250 [2020-09-21 12:28:43,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:28:43,391 INFO L225 Difference]: With dead ends: 4733 [2020-09-21 12:28:43,392 INFO L226 Difference]: Without dead ends: 2473 [2020-09-21 12:28:43,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:28:43,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2473 states. [2020-09-21 12:28:43,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2473 to 2407. [2020-09-21 12:28:43,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2407 states. [2020-09-21 12:28:43,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2407 states to 2407 states and 2903 transitions. [2020-09-21 12:28:43,487 INFO L78 Accepts]: Start accepts. Automaton has 2407 states and 2903 transitions. Word has length 250 [2020-09-21 12:28:43,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:28:43,488 INFO L479 AbstractCegarLoop]: Abstraction has 2407 states and 2903 transitions. [2020-09-21 12:28:43,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 12:28:43,488 INFO L276 IsEmpty]: Start isEmpty. Operand 2407 states and 2903 transitions. [2020-09-21 12:28:43,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2020-09-21 12:28:43,497 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:28:43,497 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-21 12:28:43,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 12:28:43,498 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:28:43,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:28:43,498 INFO L82 PathProgramCache]: Analyzing trace with hash -826534457, now seen corresponding path program 1 times [2020-09-21 12:28:43,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:28:43,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782823694] [2020-09-21 12:28:43,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:28:43,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:43,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:43,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:44,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:44,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 273 [2020-09-21 12:28:44,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:28:44,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1064 [2020-09-21 12:28:44,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:44,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:28:44,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 99 [2020-09-21 12:28:44,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 12:28:44,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:28:44,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:28:44,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:44,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:44,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:44,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:28:44,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:44,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-21 12:28:44,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:44,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:28:44,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:28:44,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:28:44,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:28:44,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 12:28:44,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:44,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:44,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:44,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:28:44,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:44,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 12:28:44,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:44,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:28:44,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:28:44,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:28:44,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:28:44,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 12:28:44,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:44,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:44,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:44,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-21 12:28:44,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:44,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-09-21 12:28:44,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:44,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:28:44,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:28:44,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:28:44,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:28:44,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-09-21 12:28:44,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:44,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:44,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:44,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 12:28:44,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:44,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-21 12:28:44,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:44,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:28:44,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:28:44,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-21 12:28:44,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:28:44,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-09-21 12:28:44,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:44,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:44,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:44,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-21 12:28:44,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:44,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-21 12:28:44,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:44,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:28:44,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-21 12:28:44,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-21 12:28:44,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:28:44,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-09-21 12:28:44,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:44,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:44,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:44,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-21 12:28:44,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:44,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-21 12:28:44,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:44,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:28:44,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 12:28:44,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:28:44,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:28:44,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2020-09-21 12:28:44,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:44,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:44,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:44,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-09-21 12:28:44,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:44,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-21 12:28:44,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:44,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:28:44,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-09-21 12:28:44,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:28:44,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:28:45,161 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 202 proven. 22 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2020-09-21 12:28:45,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782823694] [2020-09-21 12:28:45,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:28:45,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 12:28:45,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352966540] [2020-09-21 12:28:45,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 12:28:45,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:28:45,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 12:28:45,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:28:45,164 INFO L87 Difference]: Start difference. First operand 2407 states and 2903 transitions. Second operand 8 states. [2020-09-21 12:28:47,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:28:47,204 INFO L93 Difference]: Finished difference Result 4945 states and 5975 transitions. [2020-09-21 12:28:47,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 12:28:47,205 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 252 [2020-09-21 12:28:47,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:28:47,216 INFO L225 Difference]: With dead ends: 4945 [2020-09-21 12:28:47,216 INFO L226 Difference]: Without dead ends: 2679 [2020-09-21 12:28:47,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-09-21 12:28:47,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2679 states. [2020-09-21 12:28:47,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2679 to 2399. [2020-09-21 12:28:47,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2399 states. [2020-09-21 12:28:47,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2399 states to 2399 states and 2811 transitions. [2020-09-21 12:28:47,289 INFO L78 Accepts]: Start accepts. Automaton has 2399 states and 2811 transitions. Word has length 252 [2020-09-21 12:28:47,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:28:47,289 INFO L479 AbstractCegarLoop]: Abstraction has 2399 states and 2811 transitions. [2020-09-21 12:28:47,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 12:28:47,290 INFO L276 IsEmpty]: Start isEmpty. Operand 2399 states and 2811 transitions. [2020-09-21 12:28:47,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-09-21 12:28:47,299 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:28:47,299 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2020-09-21 12:28:47,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 12:28:47,299 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:28:47,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:28:47,300 INFO L82 PathProgramCache]: Analyzing trace with hash 2053005930, now seen corresponding path program 1 times [2020-09-21 12:28:47,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:28:47,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971071269] [2020-09-21 12:28:47,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:28:47,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:47,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:47,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:48,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:48,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 290 [2020-09-21 12:28:48,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:28:48,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1015 [2020-09-21 12:28:48,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:48,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:28:48,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 131 [2020-09-21 12:28:48,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-21 12:28:48,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-21 12:28:48,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:28:48,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:48,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:48,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:48,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:28:48,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:48,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-21 12:28:48,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:48,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:28:48,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:28:48,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:28:48,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:28:48,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 12:28:48,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:48,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:48,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:48,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:28:48,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:48,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-21 12:28:48,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:48,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:28:48,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:28:48,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:28:48,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:28:48,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 12:28:48,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:48,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:48,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:48,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-21 12:28:48,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:48,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-09-21 12:28:48,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:48,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:28:48,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:28:48,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:28:48,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:28:48,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-09-21 12:28:48,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:48,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:48,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:48,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-21 12:28:48,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:48,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-09-21 12:28:48,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:48,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:28:48,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:28:48,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-09-21 12:28:48,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:28:48,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-09-21 12:28:48,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:48,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:48,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:48,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-21 12:28:48,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:48,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-09-21 12:28:48,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:48,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:28:48,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-21 12:28:48,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 12:28:48,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:28:48,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-09-21 12:28:48,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:48,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:48,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:48,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-09-21 12:28:48,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:48,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-21 12:28:48,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:48,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:28:48,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-09-21 12:28:48,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:28:48,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:28:49,025 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 216 proven. 14 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2020-09-21 12:28:49,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971071269] [2020-09-21 12:28:49,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:28:49,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 12:28:49,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011619402] [2020-09-21 12:28:49,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 12:28:49,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:28:49,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 12:28:49,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:28:49,028 INFO L87 Difference]: Start difference. First operand 2399 states and 2811 transitions. Second operand 7 states. [2020-09-21 12:28:50,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:28:50,598 INFO L93 Difference]: Finished difference Result 4864 states and 5872 transitions. [2020-09-21 12:28:50,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 12:28:50,599 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 271 [2020-09-21 12:28:50,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:28:50,614 INFO L225 Difference]: With dead ends: 4864 [2020-09-21 12:28:50,614 INFO L226 Difference]: Without dead ends: 2606 [2020-09-21 12:28:50,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:28:50,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2606 states. [2020-09-21 12:28:50,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2606 to 2399. [2020-09-21 12:28:50,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2399 states. [2020-09-21 12:28:50,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2399 states to 2399 states and 2792 transitions. [2020-09-21 12:28:50,729 INFO L78 Accepts]: Start accepts. Automaton has 2399 states and 2792 transitions. Word has length 271 [2020-09-21 12:28:50,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:28:50,729 INFO L479 AbstractCegarLoop]: Abstraction has 2399 states and 2792 transitions. [2020-09-21 12:28:50,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 12:28:50,729 INFO L276 IsEmpty]: Start isEmpty. Operand 2399 states and 2792 transitions. [2020-09-21 12:28:50,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2020-09-21 12:28:50,738 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:28:50,738 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2020-09-21 12:28:50,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 12:28:50,738 INFO L427 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:28:50,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:28:50,739 INFO L82 PathProgramCache]: Analyzing trace with hash -2118726298, now seen corresponding path program 1 times [2020-09-21 12:28:50,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:28:50,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379678051] [2020-09-21 12:28:50,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:28:50,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:50,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:51,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:51,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:52,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:52,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 301 [2020-09-21 12:28:52,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:28:52,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1179 [2020-09-21 12:28:52,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:52,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:28:52,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 210 [2020-09-21 12:28:52,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-09-21 12:28:52,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:28:52,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:28:52,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:52,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:52,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:52,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:28:52,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:52,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 12:28:52,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:52,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:28:52,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:28:52,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:28:52,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:28:52,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 12:28:52,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:52,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:52,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:52,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-09-21 12:28:52,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:52,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-21 12:28:52,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:52,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:28:52,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:28:52,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:28:52,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:28:52,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-09-21 12:28:52,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:52,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:52,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:52,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-21 12:28:52,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:52,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-21 12:28:52,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:52,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:28:52,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:28:52,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:28:52,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:28:52,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-09-21 12:28:52,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:52,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:52,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:52,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-21 12:28:52,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:52,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-21 12:28:52,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:52,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:28:52,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:28:52,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:28:52,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:28:52,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-09-21 12:28:52,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:52,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:52,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:52,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-21 12:28:52,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:52,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-21 12:28:52,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:52,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:28:52,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:28:52,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:28:52,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:28:52,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2020-09-21 12:28:52,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:28:52,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:28:52,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:28:52,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-09-21 12:28:52,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:28:52,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-09-21 12:28:52,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:28:52,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:28:52,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:28:52,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-21 12:28:52,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:28:52,453 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 183 proven. 5 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-09-21 12:28:52,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379678051] [2020-09-21 12:28:52,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:28:52,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 12:28:52,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741484993] [2020-09-21 12:28:52,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:28:52,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:28:52,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:28:52,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:28:52,455 INFO L87 Difference]: Start difference. First operand 2399 states and 2792 transitions. Second operand 5 states. [2020-09-21 12:28:53,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:28:53,744 INFO L93 Difference]: Finished difference Result 5207 states and 6037 transitions. [2020-09-21 12:28:53,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:28:53,745 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 282 [2020-09-21 12:28:53,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:28:53,746 INFO L225 Difference]: With dead ends: 5207 [2020-09-21 12:28:53,746 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 12:28:53,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:28:53,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 12:28:53,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 12:28:53,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 12:28:53,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 12:28:53,756 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 282 [2020-09-21 12:28:53,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:28:53,756 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 12:28:53,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:28:53,756 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 12:28:53,756 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 12:28:53,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 12:28:53,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 12:28:54,337 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2020-09-21 12:28:54,621 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 88 [2020-09-21 12:28:54,936 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 87 [2020-09-21 12:28:56,509 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 267 DAG size of output: 177 [2020-09-21 12:28:57,482 WARN L193 SmtUtils]: Spent 971.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 177 [2020-09-21 12:28:57,630 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 35 [2020-09-21 12:28:58,760 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 174 DAG size of output: 65