/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=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/Problem14_label36.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 18:26:16,282 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 18:26:16,285 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 18:26:16,312 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 18:26:16,312 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 18:26:16,314 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 18:26:16,316 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 18:26:16,318 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 18:26:16,320 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 18:26:16,321 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 18:26:16,322 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 18:26:16,324 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 18:26:16,324 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 18:26:16,325 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 18:26:16,327 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 18:26:16,328 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 18:26:16,329 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 18:26:16,330 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 18:26:16,332 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 18:26:16,334 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 18:26:16,336 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 18:26:16,337 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 18:26:16,339 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 18:26:16,340 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 18:26:16,342 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 18:26:16,343 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 18:26:16,343 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 18:26:16,344 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 18:26:16,345 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 18:26:16,346 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 18:26:16,346 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 18:26:16,347 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 18:26:16,348 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 18:26:16,349 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 18:26:16,350 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 18:26:16,350 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 18:26:16,351 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 18:26:16,352 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 18:26:16,352 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 18:26:16,354 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 18:26:16,356 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 18:26:16,357 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 18:26:16,420 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 18:26:16,421 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 18:26:16,423 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 18:26:16,423 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 18:26:16,424 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 18:26:16,424 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 18:26:16,424 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 18:26:16,424 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 18:26:16,424 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 18:26:16,425 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 18:26:16,426 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 18:26:16,426 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 18:26:16,426 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 18:26:16,426 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 18:26:16,427 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 18:26:16,427 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 18:26:16,427 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 18:26:16,427 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 18:26:16,427 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 18:26:16,428 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 18:26:16,429 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 18:26:16,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:26:16,430 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 18:26:16,430 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 18:26:16,430 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 18:26:16,430 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 18:26:16,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 18:26:16,431 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 18:26:16,431 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 18:26:16,431 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=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=5000;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=5000;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=5000;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=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-24 18:26:16,920 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 18:26:16,945 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 18:26:16,950 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 18:26:16,953 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 18:26:16,954 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 18:26:16,955 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label36.c [2020-09-24 18:26:17,051 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a2f4a6ff9/c14e840e52a449c5811d63a099f22d76/FLAG1b3c5fce3 [2020-09-24 18:26:17,811 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 18:26:17,813 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem14_label36.c [2020-09-24 18:26:17,833 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a2f4a6ff9/c14e840e52a449c5811d63a099f22d76/FLAG1b3c5fce3 [2020-09-24 18:26:17,972 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a2f4a6ff9/c14e840e52a449c5811d63a099f22d76 [2020-09-24 18:26:17,990 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 18:26:17,997 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 18:26:17,999 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 18:26:17,999 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 18:26:18,003 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 18:26:18,005 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:26:17" (1/1) ... [2020-09-24 18:26:18,010 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c489c92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:26:18, skipping insertion in model container [2020-09-24 18:26:18,010 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:26:17" (1/1) ... [2020-09-24 18:26:18,021 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 18:26:18,095 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 18:26:18,754 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:26:18,765 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 18:26:18,915 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:26:18,935 INFO L208 MainTranslator]: Completed translation [2020-09-24 18:26:18,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:26:18 WrapperNode [2020-09-24 18:26:18,936 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 18:26:18,937 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 18:26:18,937 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 18:26:18,937 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 18:26:18,955 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:26:18" (1/1) ... [2020-09-24 18:26:18,955 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:26:18" (1/1) ... [2020-09-24 18:26:18,990 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:26:18" (1/1) ... [2020-09-24 18:26:18,990 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:26:18" (1/1) ... [2020-09-24 18:26:19,051 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:26:18" (1/1) ... [2020-09-24 18:26:19,077 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:26:18" (1/1) ... [2020-09-24 18:26:19,097 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:26:18" (1/1) ... [2020-09-24 18:26:19,125 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 18:26:19,125 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 18:26:19,126 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 18:26:19,126 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 18:26:19,128 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:26:18" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:26:19,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 18:26:19,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 18:26:19,221 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 18:26:19,221 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 18:26:19,221 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 18:26:19,222 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 18:26:19,222 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 18:26:19,222 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 18:26:19,223 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 18:26:19,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 18:26:19,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 18:26:20,934 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 18:26:20,935 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 18:26:20,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:26:20 BoogieIcfgContainer [2020-09-24 18:26:20,953 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 18:26:20,955 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 18:26:20,956 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 18:26:20,959 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 18:26:20,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 06:26:17" (1/3) ... [2020-09-24 18:26:20,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@730b7d0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:26:20, skipping insertion in model container [2020-09-24 18:26:20,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:26:18" (2/3) ... [2020-09-24 18:26:20,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@730b7d0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:26:20, skipping insertion in model container [2020-09-24 18:26:20,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:26:20" (3/3) ... [2020-09-24 18:26:20,966 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label36.c [2020-09-24 18:26:20,979 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 18:26:20,994 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 18:26:21,018 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 18:26:21,070 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 18:26:21,071 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 18:26:21,071 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 18:26:21,071 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 18:26:21,071 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 18:26:21,072 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 18:26:21,072 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 18:26:21,072 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 18:26:21,123 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states. [2020-09-24 18:26:21,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-24 18:26:21,143 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:26:21,145 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] [2020-09-24 18:26:21,146 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:26:21,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:26:21,155 INFO L82 PathProgramCache]: Analyzing trace with hash -4985686, now seen corresponding path program 1 times [2020-09-24 18:26:21,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:26:21,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680334806] [2020-09-24 18:26:21,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:26:21,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:21,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:21,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:21,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:22,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:22,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-24 18:26:22,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 18:26:22,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 761 [2020-09-24 18:26:22,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:22,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 18:26:22,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 18:26:22,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-09-24 18:26:22,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 18:26:22,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:26:22,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:22,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:22,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:22,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 18:26:22,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:22,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-24 18:26:22,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:22,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:26:22,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:26:22,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 18:26:22,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:26:22,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:26:22,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [680334806] [2020-09-24 18:26:22,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:26:22,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 18:26:22,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493051208] [2020-09-24 18:26:22,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 18:26:22,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:26:22,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 18:26:22,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 18:26:22,353 INFO L87 Difference]: Start difference. First operand 678 states. Second operand 4 states. [2020-09-24 18:26:25,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:26:25,335 INFO L93 Difference]: Finished difference Result 1656 states and 2196 transitions. [2020-09-24 18:26:25,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 18:26:25,337 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-09-24 18:26:25,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:26:25,364 INFO L225 Difference]: With dead ends: 1656 [2020-09-24 18:26:25,365 INFO L226 Difference]: Without dead ends: 920 [2020-09-24 18:26:25,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:26:25,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2020-09-24 18:26:25,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 806. [2020-09-24 18:26:25,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 806 states. [2020-09-24 18:26:25,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 969 transitions. [2020-09-24 18:26:25,493 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 969 transitions. Word has length 67 [2020-09-24 18:26:25,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:26:25,494 INFO L479 AbstractCegarLoop]: Abstraction has 806 states and 969 transitions. [2020-09-24 18:26:25,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 18:26:25,494 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 969 transitions. [2020-09-24 18:26:25,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-09-24 18:26:25,503 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:26:25,503 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:26:25,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 18:26:25,504 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:26:25,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:26:25,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1033084141, now seen corresponding path program 1 times [2020-09-24 18:26:25,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:26:25,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357379951] [2020-09-24 18:26:25,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:26:25,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:25,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:25,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:25,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:26,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:26,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:27,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:27,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:30,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:30,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-09-24 18:26:30,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 18:26:30,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-24 18:26:30,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:30,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:26:30,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 96 [2020-09-24 18:26:30,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-09-24 18:26:30,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:26:30,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:26:30,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:30,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:30,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:30,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 18:26:30,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:30,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-24 18:26:30,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:30,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:26:30,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:26:30,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:26:30,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:26:30,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 18:26:30,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:30,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:30,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:30,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-24 18:26:30,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:30,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-09-24 18:26:30,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:30,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:26:30,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:26:30,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-09-24 18:26:30,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:26:30,914 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:26:30,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357379951] [2020-09-24 18:26:30,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:26:30,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 18:26:30,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722307237] [2020-09-24 18:26:30,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 18:26:30,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:26:30,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 18:26:30,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 18:26:30,922 INFO L87 Difference]: Start difference. First operand 806 states and 969 transitions. Second operand 6 states. [2020-09-24 18:26:34,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:26:34,842 INFO L93 Difference]: Finished difference Result 2228 states and 2803 transitions. [2020-09-24 18:26:34,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 18:26:34,843 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 146 [2020-09-24 18:26:34,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:26:34,855 INFO L225 Difference]: With dead ends: 2228 [2020-09-24 18:26:34,855 INFO L226 Difference]: Without dead ends: 1437 [2020-09-24 18:26:34,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-24 18:26:34,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1437 states. [2020-09-24 18:26:34,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1437 to 1188. [2020-09-24 18:26:34,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1188 states. [2020-09-24 18:26:34,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 1518 transitions. [2020-09-24 18:26:34,928 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 1518 transitions. Word has length 146 [2020-09-24 18:26:34,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:26:34,931 INFO L479 AbstractCegarLoop]: Abstraction has 1188 states and 1518 transitions. [2020-09-24 18:26:34,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 18:26:34,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 1518 transitions. [2020-09-24 18:26:34,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-09-24 18:26:34,948 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:26:34,948 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:26:34,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 18:26:34,949 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:26:34,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:26:34,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1110606662, now seen corresponding path program 1 times [2020-09-24 18:26:34,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:26:34,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252995221] [2020-09-24 18:26:34,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:26:34,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:35,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:35,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:35,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:37,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:38,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:39,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:39,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:39,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-09-24 18:26:39,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 18:26:39,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4608 [2020-09-24 18:26:39,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:39,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:26:39,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 118 [2020-09-24 18:26:39,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-09-24 18:26:39,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:26:39,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:26:39,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:39,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:39,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:39,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 18:26:39,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:39,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 18:26:39,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:39,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:26:39,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:26:39,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:26:39,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:26:39,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 18:26:39,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:39,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:39,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:39,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-09-24 18:26:39,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:39,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-09-24 18:26:39,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:39,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:26:39,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:26:39,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-09-24 18:26:39,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:26:39,930 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:26:39,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252995221] [2020-09-24 18:26:39,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:26:39,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 18:26:39,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761377847] [2020-09-24 18:26:39,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:26:39,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:26:39,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:26:39,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:26:39,934 INFO L87 Difference]: Start difference. First operand 1188 states and 1518 transitions. Second operand 5 states. [2020-09-24 18:26:42,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:26:42,650 INFO L93 Difference]: Finished difference Result 3171 states and 4204 transitions. [2020-09-24 18:26:42,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 18:26:42,651 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 170 [2020-09-24 18:26:42,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:26:42,668 INFO L225 Difference]: With dead ends: 3171 [2020-09-24 18:26:42,669 INFO L226 Difference]: Without dead ends: 1998 [2020-09-24 18:26:42,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-24 18:26:42,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2020-09-24 18:26:42,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1968. [2020-09-24 18:26:42,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1968 states. [2020-09-24 18:26:42,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 2612 transitions. [2020-09-24 18:26:42,798 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 2612 transitions. Word has length 170 [2020-09-24 18:26:42,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:26:42,799 INFO L479 AbstractCegarLoop]: Abstraction has 1968 states and 2612 transitions. [2020-09-24 18:26:42,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:26:42,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 2612 transitions. [2020-09-24 18:26:42,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-09-24 18:26:42,806 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:26:42,807 INFO L422 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-24 18:26:42,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 18:26:42,812 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:26:42,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:26:42,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1695545964, now seen corresponding path program 1 times [2020-09-24 18:26:42,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:26:42,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900176282] [2020-09-24 18:26:42,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:26:42,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:42,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:42,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:43,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:43,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:44,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:45,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:45,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:46,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:47,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:47,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 268 [2020-09-24 18:26:47,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 18:26:47,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-09-24 18:26:47,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:47,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:26:47,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 120 [2020-09-24 18:26:47,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-09-24 18:26:47,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:26:47,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:26:47,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:47,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:47,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:47,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 18:26:47,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:47,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 18:26:47,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:47,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:26:47,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:26:47,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:26:47,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:26:47,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 18:26:47,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:47,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:48,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:48,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-09-24 18:26:48,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:48,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-09-24 18:26:48,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:48,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:26:48,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:26:48,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-09-24 18:26:48,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:26:48,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-09-24 18:26:48,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:48,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:48,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:48,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-09-24 18:26:48,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:48,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-09-24 18:26:48,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:48,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:26:48,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 18:26:48,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-09-24 18:26:48,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:26:48,321 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 181 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 18:26:48,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900176282] [2020-09-24 18:26:48,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:26:48,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 18:26:48,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166590228] [2020-09-24 18:26:48,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 18:26:48,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:26:48,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 18:26:48,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:26:48,326 INFO L87 Difference]: Start difference. First operand 1968 states and 2612 transitions. Second operand 7 states. [2020-09-24 18:26:51,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:26:51,951 INFO L93 Difference]: Finished difference Result 4110 states and 5423 transitions. [2020-09-24 18:26:51,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 18:26:51,952 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 255 [2020-09-24 18:26:51,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:26:51,965 INFO L225 Difference]: With dead ends: 4110 [2020-09-24 18:26:51,965 INFO L226 Difference]: Without dead ends: 2157 [2020-09-24 18:26:51,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-09-24 18:26:51,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2157 states. [2020-09-24 18:26:52,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2157 to 1980. [2020-09-24 18:26:52,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1980 states. [2020-09-24 18:26:52,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 2587 transitions. [2020-09-24 18:26:52,038 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 2587 transitions. Word has length 255 [2020-09-24 18:26:52,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:26:52,038 INFO L479 AbstractCegarLoop]: Abstraction has 1980 states and 2587 transitions. [2020-09-24 18:26:52,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 18:26:52,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 2587 transitions. [2020-09-24 18:26:52,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-09-24 18:26:52,045 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:26:52,045 INFO L422 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-24 18:26:52,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 18:26:52,046 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:26:52,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:26:52,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1019981069, now seen corresponding path program 1 times [2020-09-24 18:26:52,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:26:52,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948444316] [2020-09-24 18:26:52,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:26:52,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:52,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:52,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:52,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:52,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:52,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:54,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:57,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:57,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 278 [2020-09-24 18:26:57,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 18:26:57,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-24 18:26:57,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:57,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:26:57,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 129 [2020-09-24 18:26:57,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-09-24 18:26:57,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:26:57,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:26:57,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:57,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:57,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:57,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 18:26:57,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:57,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 18:26:57,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:57,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:26:57,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:26:57,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:26:57,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:26:57,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 18:26:57,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:57,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:57,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:57,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-09-24 18:26:57,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:57,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-09-24 18:26:57,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:57,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:26:57,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:26:57,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-09-24 18:26:57,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:26:57,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-09-24 18:26:57,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:57,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:57,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:57,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-09-24 18:26:57,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:57,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-09-24 18:26:57,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:57,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:26:57,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 18:26:57,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-09-24 18:26:57,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:26:57,680 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 181 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 18:26:57,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948444316] [2020-09-24 18:26:57,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:26:57,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 18:26:57,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381500828] [2020-09-24 18:26:57,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 18:26:57,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:26:57,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 18:26:57,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:26:57,684 INFO L87 Difference]: Start difference. First operand 1980 states and 2587 transitions. Second operand 7 states. [2020-09-24 18:27:02,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:27:02,321 INFO L93 Difference]: Finished difference Result 6332 states and 9034 transitions. [2020-09-24 18:27:02,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 18:27:02,322 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 265 [2020-09-24 18:27:02,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:27:02,356 INFO L225 Difference]: With dead ends: 6332 [2020-09-24 18:27:02,356 INFO L226 Difference]: Without dead ends: 4162 [2020-09-24 18:27:02,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-24 18:27:02,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4162 states. [2020-09-24 18:27:02,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4162 to 3330. [2020-09-24 18:27:02,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3330 states. [2020-09-24 18:27:02,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3330 states to 3330 states and 4572 transitions. [2020-09-24 18:27:02,526 INFO L78 Accepts]: Start accepts. Automaton has 3330 states and 4572 transitions. Word has length 265 [2020-09-24 18:27:02,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:27:02,526 INFO L479 AbstractCegarLoop]: Abstraction has 3330 states and 4572 transitions. [2020-09-24 18:27:02,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 18:27:02,526 INFO L276 IsEmpty]: Start isEmpty. Operand 3330 states and 4572 transitions. [2020-09-24 18:27:02,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2020-09-24 18:27:02,544 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:27:02,544 INFO L422 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:27:02,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 18:27:02,545 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:27:02,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:27:02,545 INFO L82 PathProgramCache]: Analyzing trace with hash -505025755, now seen corresponding path program 1 times [2020-09-24 18:27:02,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:27:02,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680486700] [2020-09-24 18:27:02,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:27:02,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:27:02,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:27:02,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:27:02,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:27:03,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:27:03,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:27:03,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:27:04,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking...