/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label05.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:38:49,004 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:38:49,008 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:38:49,052 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:38:49,053 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:38:49,061 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:38:49,063 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:38:49,067 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:38:49,070 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:38:49,074 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:38:49,075 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:38:49,076 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:38:49,076 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:38:49,079 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:38:49,082 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:38:49,084 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:38:49,085 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:38:49,087 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:38:49,088 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:38:49,096 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:38:49,099 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:38:49,100 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:38:49,101 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:38:49,102 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:38:49,119 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:38:49,119 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:38:49,119 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:38:49,120 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:38:49,123 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:38:49,124 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:38:49,124 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:38:49,125 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:38:49,128 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:38:49,129 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:38:49,130 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:38:49,130 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:38:49,132 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:38:49,133 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:38:49,133 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:38:49,134 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:38:49,135 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:38:49,136 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 21:38:49,162 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:38:49,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:38:49,164 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:38:49,164 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:38:49,164 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:38:49,165 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:38:49,165 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:38:49,165 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:38:49,165 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:38:49,165 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:38:49,166 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:38:49,166 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:38:49,166 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:38:49,166 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:38:49,167 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:38:49,167 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:38:49,167 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:38:49,167 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:38:49,167 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:38:49,168 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:38:49,168 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:38:49,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:38:49,168 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:38:49,168 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:38:49,169 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:38:49,169 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:38:49,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:38:49,169 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:38:49,169 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:38:49,170 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:38:49,618 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:38:49,638 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:38:49,642 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:38:49,645 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:38:49,645 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:38:49,646 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label05.c [2020-09-24 21:38:49,720 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3dfaf243a/8b96852cbc674d27bd4089377836ce24/FLAG539f351c9 [2020-09-24 21:38:50,381 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:38:50,382 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label05.c [2020-09-24 21:38:50,396 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3dfaf243a/8b96852cbc674d27bd4089377836ce24/FLAG539f351c9 [2020-09-24 21:38:50,601 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3dfaf243a/8b96852cbc674d27bd4089377836ce24 [2020-09-24 21:38:50,616 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:38:50,623 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:38:50,624 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:38:50,624 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:38:50,628 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:38:50,630 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:38:50" (1/1) ... [2020-09-24 21:38:50,634 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6df9f1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:38:50, skipping insertion in model container [2020-09-24 21:38:50,634 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:38:50" (1/1) ... [2020-09-24 21:38:50,644 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:38:50,716 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:38:51,251 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:38:51,260 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:38:51,522 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:38:51,542 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:38:51,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:38:51 WrapperNode [2020-09-24 21:38:51,543 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:38:51,544 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:38:51,544 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:38:51,544 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:38:51,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:38:51" (1/1) ... [2020-09-24 21:38:51,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:38:51" (1/1) ... [2020-09-24 21:38:51,579 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:38:51" (1/1) ... [2020-09-24 21:38:51,580 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:38:51" (1/1) ... [2020-09-24 21:38:51,626 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:38:51" (1/1) ... [2020-09-24 21:38:51,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:38:51" (1/1) ... [2020-09-24 21:38:51,652 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:38:51" (1/1) ... [2020-09-24 21:38:51,665 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:38:51,665 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:38:51,665 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:38:51,666 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:38:51,667 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:38:51" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:38:51,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:38:51,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:38:51,753 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:38:51,753 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:38:51,753 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:38:51,753 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:38:51,753 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:38:51,753 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:38:51,754 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:38:51,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:38:51,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:38:53,085 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:38:53,086 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:38:53,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:38:53 BoogieIcfgContainer [2020-09-24 21:38:53,096 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:38:53,097 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:38:53,097 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:38:53,101 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:38:53,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:38:50" (1/3) ... [2020-09-24 21:38:53,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50de1935 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:38:53, skipping insertion in model container [2020-09-24 21:38:53,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:38:51" (2/3) ... [2020-09-24 21:38:53,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50de1935 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:38:53, skipping insertion in model container [2020-09-24 21:38:53,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:38:53" (3/3) ... [2020-09-24 21:38:53,106 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label05.c [2020-09-24 21:38:53,119 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:38:53,131 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:38:53,157 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:38:53,195 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:38:53,195 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:38:53,195 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:38:53,196 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:38:53,196 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:38:53,196 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:38:53,196 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:38:53,196 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:38:53,230 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-24 21:38:53,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-09-24 21:38:53,251 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:38:53,253 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:38:53,253 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:38:53,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:38:53,262 INFO L82 PathProgramCache]: Analyzing trace with hash 576098423, now seen corresponding path program 1 times [2020-09-24 21:38:53,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:38:53,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896308598] [2020-09-24 21:38:53,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:38:53,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:53,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:53,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:54,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:55,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:56,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:57,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:57,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:57,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:58,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:58,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-09-24 21:38:58,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 21:38:58,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-09-24 21:38:58,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:58,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:38:58,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:38:58,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-09-24 21:38:58,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:38:59,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:38:59,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:59,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:59,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:59,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:38:59,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:59,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-09-24 21:38:59,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:59,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:38:59,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:38:59,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:38:59,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:59,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:38:59,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896308598] [2020-09-24 21:38:59,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:38:59,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-09-24 21:38:59,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044502375] [2020-09-24 21:38:59,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 21:38:59,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:38:59,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 21:38:59,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2020-09-24 21:38:59,731 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 18 states. [2020-09-24 21:39:00,146 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-09-24 21:39:00,289 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-09-24 21:39:00,453 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-09-24 21:39:00,699 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2020-09-24 21:39:00,959 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-09-24 21:39:01,389 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 87 [2020-09-24 21:39:02,297 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 86 [2020-09-24 21:39:02,823 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 84 [2020-09-24 21:39:03,955 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2020-09-24 21:39:04,938 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2020-09-24 21:39:07,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:39:07,769 INFO L93 Difference]: Finished difference Result 1700 states and 2421 transitions. [2020-09-24 21:39:07,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-24 21:39:07,772 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 122 [2020-09-24 21:39:07,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:39:07,805 INFO L225 Difference]: With dead ends: 1700 [2020-09-24 21:39:07,805 INFO L226 Difference]: Without dead ends: 1101 [2020-09-24 21:39:07,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=348, Invalid=842, Unknown=0, NotChecked=0, Total=1190 [2020-09-24 21:39:07,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2020-09-24 21:39:07,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 985. [2020-09-24 21:39:07,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 985 states. [2020-09-24 21:39:07,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1148 transitions. [2020-09-24 21:39:07,945 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1148 transitions. Word has length 122 [2020-09-24 21:39:07,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:39:07,946 INFO L479 AbstractCegarLoop]: Abstraction has 985 states and 1148 transitions. [2020-09-24 21:39:07,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 21:39:07,947 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1148 transitions. [2020-09-24 21:39:07,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-09-24 21:39:07,955 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:39:07,955 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:39:07,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:39:07,956 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:39:07,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:39:07,956 INFO L82 PathProgramCache]: Analyzing trace with hash 812216710, now seen corresponding path program 1 times [2020-09-24 21:39:07,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:39:07,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583149200] [2020-09-24 21:39:07,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:39:08,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:08,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:08,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:09,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:09,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-09-24 21:39:09,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:39:09,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1262 [2020-09-24 21:39:09,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:09,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:39:09,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:39:09,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 133 [2020-09-24 21:39:09,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:09,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:39:09,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:09,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:09,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:09,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:39:09,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:39:09,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-24 21:39:09,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:09,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:39:09,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:39:09,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:39:09,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:09,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:39:09,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:09,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:09,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:09,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:09,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 21:39:09,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:39:09,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-24 21:39:09,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:09,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:39:09,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:39:09,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:39:09,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:09,602 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-24 21:39:09,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583149200] [2020-09-24 21:39:09,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:39:09,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 21:39:09,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430914204] [2020-09-24 21:39:09,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 21:39:09,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:39:09,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 21:39:09,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-24 21:39:09,607 INFO L87 Difference]: Start difference. First operand 985 states and 1148 transitions. Second operand 6 states. [2020-09-24 21:39:11,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:39:11,624 INFO L93 Difference]: Finished difference Result 2364 states and 2855 transitions. [2020-09-24 21:39:11,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 21:39:11,625 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 143 [2020-09-24 21:39:11,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:39:11,634 INFO L225 Difference]: With dead ends: 2364 [2020-09-24 21:39:11,634 INFO L226 Difference]: Without dead ends: 1467 [2020-09-24 21:39:11,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-09-24 21:39:11,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1467 states. [2020-09-24 21:39:11,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1467 to 1418. [2020-09-24 21:39:11,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1418 states. [2020-09-24 21:39:11,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 1694 transitions. [2020-09-24 21:39:11,704 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 1694 transitions. Word has length 143 [2020-09-24 21:39:11,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:39:11,705 INFO L479 AbstractCegarLoop]: Abstraction has 1418 states and 1694 transitions. [2020-09-24 21:39:11,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 21:39:11,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 1694 transitions. [2020-09-24 21:39:11,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-09-24 21:39:11,712 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:39:11,713 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:39:11,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:39:11,713 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:39:11,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:39:11,714 INFO L82 PathProgramCache]: Analyzing trace with hash -487846174, now seen corresponding path program 1 times [2020-09-24 21:39:11,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:39:11,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371452406] [2020-09-24 21:39:11,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:39:11,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:11,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:11,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:12,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:14,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:14,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:15,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:16,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:16,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-09-24 21:39:16,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 21:39:16,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-09-24 21:39:16,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:16,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-09-24 21:39:16,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:39:16,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-09-24 21:39:16,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:39:17,345 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2020-09-24 21:39:17,519 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2020-09-24 21:39:17,714 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2020-09-24 21:39:17,928 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2020-09-24 21:39:18,129 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2020-09-24 21:39:18,327 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2020-09-24 21:39:18,515 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 37 [2020-09-24 21:39:18,696 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 36 [2020-09-24 21:39:18,843 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 34 [2020-09-24 21:39:18,999 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 34 [2020-09-24 21:39:19,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:39:19,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:19,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:19,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:19,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:39:19,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:39:19,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-09-24 21:39:19,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:19,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:39:19,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:39:19,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:39:19,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:19,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:39:19,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:19,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:19,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:19,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:39:19,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:39:19,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-09-24 21:39:19,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:19,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:39:19,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:39:19,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:39:19,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:39:19,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-24 21:39:19,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:19,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:19,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:19,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:19,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 21:39:19,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:39:19,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-09-24 21:39:19,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:19,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:39:19,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:39:19,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:39:19,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:20,078 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 25 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:39:20,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371452406] [2020-09-24 21:39:20,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:39:20,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-24 21:39:20,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120086250] [2020-09-24 21:39:20,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-24 21:39:20,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:39:20,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-24 21:39:20,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2020-09-24 21:39:20,082 INFO L87 Difference]: Start difference. First operand 1418 states and 1694 transitions. Second operand 28 states. [2020-09-24 21:39:21,166 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2020-09-24 21:39:22,162 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-09-24 21:39:22,602 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-09-24 21:39:22,818 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-09-24 21:39:23,169 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-09-24 21:39:23,410 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-09-24 21:39:24,785 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-09-24 21:39:24,939 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-09-24 21:39:25,298 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2020-09-24 21:39:25,579 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2020-09-24 21:39:26,142 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 92 [2020-09-24 21:39:26,402 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-09-24 21:39:26,678 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-09-24 21:39:27,060 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-09-24 21:39:27,460 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 93 [2020-09-24 21:39:27,921 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-09-24 21:39:28,354 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 93 [2020-09-24 21:39:28,547 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-09-24 21:39:29,264 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 93 [2020-09-24 21:39:29,724 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 92 [2020-09-24 21:39:30,106 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 91 [2020-09-24 21:39:30,336 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-09-24 21:39:30,652 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 91 [2020-09-24 21:39:30,960 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-09-24 21:39:31,165 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-09-24 21:39:31,469 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 90 [2020-09-24 21:39:32,298 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-09-24 21:39:32,885 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 90 [2020-09-24 21:39:33,228 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 88 [2020-09-24 21:39:33,694 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 86 [2020-09-24 21:39:34,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:39:34,983 INFO L93 Difference]: Finished difference Result 4801 states and 6339 transitions. [2020-09-24 21:39:34,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-09-24 21:39:34,983 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 160 [2020-09-24 21:39:34,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:39:35,004 INFO L225 Difference]: With dead ends: 4801 [2020-09-24 21:39:35,004 INFO L226 Difference]: Without dead ends: 3459 [2020-09-24 21:39:35,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1543 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=1475, Invalid=4225, Unknown=0, NotChecked=0, Total=5700 [2020-09-24 21:39:35,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3459 states. [2020-09-24 21:39:35,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3459 to 2665. [2020-09-24 21:39:35,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2665 states. [2020-09-24 21:39:35,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2665 states to 2665 states and 3232 transitions. [2020-09-24 21:39:35,144 INFO L78 Accepts]: Start accepts. Automaton has 2665 states and 3232 transitions. Word has length 160 [2020-09-24 21:39:35,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:39:35,146 INFO L479 AbstractCegarLoop]: Abstraction has 2665 states and 3232 transitions. [2020-09-24 21:39:35,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-24 21:39:35,147 INFO L276 IsEmpty]: Start isEmpty. Operand 2665 states and 3232 transitions. [2020-09-24 21:39:35,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-09-24 21:39:35,161 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:39:35,161 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:39:35,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:39:35,162 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:39:35,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:39:35,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1723591899, now seen corresponding path program 1 times [2020-09-24 21:39:35,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:39:35,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173045234] [2020-09-24 21:39:35,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:39:35,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:35,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:35,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:36,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:36,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:36,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:40,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:40,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-09-24 21:39:40,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 21:39:40,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-09-24 21:39:40,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:40,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:39:40,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-09-24 21:39:40,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:39:40,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:40,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:39:40,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:40,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:40,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:40,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:39:40,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:39:40,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 21:39:40,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:40,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:39:40,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:39:40,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:39:40,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:40,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:39:40,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:40,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:40,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:40,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 21:39:40,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:39:40,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-24 21:39:40,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:40,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:39:40,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:39:40,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 21:39:40,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:40,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-24 21:39:40,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:40,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:40,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:40,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:39:40,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:39:40,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-24 21:39:40,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:40,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:39:40,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:39:40,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:39:40,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:40,426 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:39:40,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173045234] [2020-09-24 21:39:40,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:39:40,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 21:39:40,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241662460] [2020-09-24 21:39:40,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 21:39:40,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:39:40,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 21:39:40,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 21:39:40,429 INFO L87 Difference]: Start difference. First operand 2665 states and 3232 transitions. Second operand 7 states.