/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 SequenceOfStatements --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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label30.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 04:33:24,318 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 04:33:24,322 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 04:33:24,349 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 04:33:24,350 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 04:33:24,351 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 04:33:24,353 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 04:33:24,356 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 04:33:24,358 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 04:33:24,359 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 04:33:24,360 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 04:33:24,362 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 04:33:24,362 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 04:33:24,364 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 04:33:24,365 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 04:33:24,367 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 04:33:24,368 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 04:33:24,370 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 04:33:24,372 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 04:33:24,374 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 04:33:24,377 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 04:33:24,378 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 04:33:24,380 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 04:33:24,380 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 04:33:24,384 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 04:33:24,384 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 04:33:24,384 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 04:33:24,386 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 04:33:24,386 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 04:33:24,387 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 04:33:24,388 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 04:33:24,388 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 04:33:24,389 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 04:33:24,390 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 04:33:24,391 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 04:33:24,391 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 04:33:24,392 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 04:33:24,393 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 04:33:24,393 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 04:33:24,394 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 04:33:24,395 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 04:33:24,396 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 [2020-10-14 04:33:24,428 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 04:33:24,429 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 04:33:24,431 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 04:33:24,431 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 04:33:24,432 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 04:33:24,432 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 04:33:24,432 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 04:33:24,432 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 04:33:24,433 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 04:33:24,433 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 04:33:24,433 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 04:33:24,433 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 04:33:24,434 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 04:33:24,434 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 04:33:24,434 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 04:33:24,434 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 04:33:24,435 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 04:33:24,435 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 04:33:24,435 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 04:33:24,436 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 04:33:24,436 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 04:33:24,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 04:33:24,436 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 04:33:24,436 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 04:33:24,437 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 04:33:24,437 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 04:33:24,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 04:33:24,437 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 04:33:24,437 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 04:33:24,438 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 -> SequenceOfStatements 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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 04:33:24,845 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 04:33:24,875 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 04:33:24,881 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 04:33:24,885 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 04:33:24,885 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 04:33:24,886 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label30.c [2020-10-14 04:33:25,000 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ea2bb6f66/8dba2db238f746b28259f30bd55e87a7/FLAG4375079d5 [2020-10-14 04:33:26,141 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 04:33:26,142 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label30.c [2020-10-14 04:33:26,208 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ea2bb6f66/8dba2db238f746b28259f30bd55e87a7/FLAG4375079d5 [2020-10-14 04:33:26,458 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ea2bb6f66/8dba2db238f746b28259f30bd55e87a7 [2020-10-14 04:33:26,475 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 04:33:26,479 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 04:33:26,481 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 04:33:26,482 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 04:33:26,487 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 04:33:26,489 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 04:33:26" (1/1) ... [2020-10-14 04:33:26,494 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20f2544e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:33:26, skipping insertion in model container [2020-10-14 04:33:26,495 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 04:33:26" (1/1) ... [2020-10-14 04:33:26,508 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 04:33:26,808 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 04:33:29,824 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 04:33:29,832 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 04:33:31,114 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 04:33:31,175 INFO L208 MainTranslator]: Completed translation [2020-10-14 04:33:31,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:33:31 WrapperNode [2020-10-14 04:33:31,185 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 04:33:31,186 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 04:33:31,187 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 04:33:31,187 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 04:33:31,207 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:33:31" (1/1) ... [2020-10-14 04:33:31,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:33:31" (1/1) ... [2020-10-14 04:33:31,345 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:33:31" (1/1) ... [2020-10-14 04:33:31,346 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:33:31" (1/1) ... [2020-10-14 04:33:31,613 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:33:31" (1/1) ... [2020-10-14 04:33:31,711 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:33:31" (1/1) ... [2020-10-14 04:33:31,990 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:33:31" (1/1) ... [2020-10-14 04:33:32,074 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 04:33:32,075 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 04:33:32,075 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 04:33:32,075 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 04:33:32,076 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:33:31" (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 [2020-10-14 04:33:32,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 04:33:32,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 04:33:32,196 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-14 04:33:32,196 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-14 04:33:32,197 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-14 04:33:32,198 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-14 04:33:32,198 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-14 04:33:32,200 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-14 04:33:32,201 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 04:33:32,201 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-14 04:33:32,201 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-14 04:33:32,201 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-14 04:33:32,202 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-14 04:33:32,202 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-14 04:33:32,202 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-14 04:33:32,203 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 04:33:32,203 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 04:33:32,203 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-14 04:33:32,203 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 04:33:32,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 04:33:32,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 04:33:47,727 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 04:33:47,727 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 04:33:47,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 04:33:47 BoogieIcfgContainer [2020-10-14 04:33:47,757 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 04:33:47,763 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 04:33:47,763 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 04:33:47,769 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 04:33:47,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 04:33:26" (1/3) ... [2020-10-14 04:33:47,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67b4c9f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 04:33:47, skipping insertion in model container [2020-10-14 04:33:47,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:33:31" (2/3) ... [2020-10-14 04:33:47,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67b4c9f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 04:33:47, skipping insertion in model container [2020-10-14 04:33:47,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 04:33:47" (3/3) ... [2020-10-14 04:33:47,778 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem19_label30.c [2020-10-14 04:33:47,794 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 04:33:47,818 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 04:33:47,837 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 04:33:47,883 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 04:33:47,883 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 04:33:47,884 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 04:33:47,884 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 04:33:47,884 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 04:33:47,884 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 04:33:47,884 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 04:33:47,884 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 04:33:47,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states. [2020-10-14 04:33:47,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 04:33:47,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:33:47,962 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] [2020-10-14 04:33:47,963 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:33:47,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:33:47,973 INFO L82 PathProgramCache]: Analyzing trace with hash 985921090, now seen corresponding path program 1 times [2020-10-14 04:33:47,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:33:47,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382917275] [2020-10-14 04:33:47,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:33:48,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:33:48,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:33:48,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:33:48,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 04:33:48,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:33:48,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 546 [2020-10-14 04:33:48,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:33:48,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:33:48,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 04:33:48,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 04:33:48,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 04:33:48,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 04:33:49,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:33:49,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:33:49,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:33:49,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:33:49,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:33:49,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:33:49,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-14 04:33:49,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:33:49,257 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:33:49,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 04:33:49,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:33:49,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 04:33:49,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:33:49,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 04:33:49,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382917275] [2020-10-14 04:33:49,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 04:33:49,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 04:33:49,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786016924] [2020-10-14 04:33:49,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 04:33:49,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:33:49,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 04:33:49,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 04:33:49,352 INFO L87 Difference]: Start difference. First operand 1777 states. Second operand 5 states. [2020-10-14 04:34:32,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:34:32,379 INFO L93 Difference]: Finished difference Result 6482 states and 12305 transitions. [2020-10-14 04:34:32,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 04:34:32,382 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-10-14 04:34:32,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:34:32,451 INFO L225 Difference]: With dead ends: 6482 [2020-10-14 04:34:32,452 INFO L226 Difference]: Without dead ends: 4637 [2020-10-14 04:34:32,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-14 04:34:32,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4637 states. [2020-10-14 04:34:32,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4637 to 4628. [2020-10-14 04:34:32,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4628 states. [2020-10-14 04:34:32,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4628 states to 4628 states and 7759 transitions. [2020-10-14 04:34:32,849 INFO L78 Accepts]: Start accepts. Automaton has 4628 states and 7759 transitions. Word has length 54 [2020-10-14 04:34:32,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:34:32,851 INFO L479 AbstractCegarLoop]: Abstraction has 4628 states and 7759 transitions. [2020-10-14 04:34:32,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 04:34:32,852 INFO L276 IsEmpty]: Start isEmpty. Operand 4628 states and 7759 transitions. [2020-10-14 04:34:32,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-14 04:34:32,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:34:32,861 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 04:34:32,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 04:34:32,862 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:34:32,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:34:32,863 INFO L82 PathProgramCache]: Analyzing trace with hash 6519311, now seen corresponding path program 1 times [2020-10-14 04:34:32,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:34:32,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545723795] [2020-10-14 04:34:32,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:34:32,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:34:33,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:34:33,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:34:35,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:34:35,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-14 04:34:35,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 04:34:35,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2452 [2020-10-14 04:34:35,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:34:35,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:34:35,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 04:34:35,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 99 [2020-10-14 04:34:35,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-14 04:34:35,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 11 [2020-10-14 04:34:35,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:34:35,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:34:35,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:34:35,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:34:35,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:34:35,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:34:35,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 04:34:35,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:34:35,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:34:35,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:34:35,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:34:35,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:34:35,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:34:35,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 04:34:35,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:34:35,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:34:35,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:34:35,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 04:34:35,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:34:35,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 181 [2020-10-14 04:34:35,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:34:35,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:34:35,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 04:34:35,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:34:35,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-14 04:34:35,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:34:36,003 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 04:34:36,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545723795] [2020-10-14 04:34:36,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 04:34:36,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 04:34:36,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358830590] [2020-10-14 04:34:36,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 04:34:36,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:34:36,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 04:34:36,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 04:34:36,010 INFO L87 Difference]: Start difference. First operand 4628 states and 7759 transitions. Second operand 5 states. [2020-10-14 04:35:22,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:35:22,105 INFO L93 Difference]: Finished difference Result 13559 states and 23036 transitions. [2020-10-14 04:35:22,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 04:35:22,107 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 143 [2020-10-14 04:35:22,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:35:22,167 INFO L225 Difference]: With dead ends: 13559 [2020-10-14 04:35:22,167 INFO L226 Difference]: Without dead ends: 8937 [2020-10-14 04:35:22,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-14 04:35:22,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8937 states. [2020-10-14 04:35:22,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8937 to 8894. [2020-10-14 04:35:22,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8894 states. [2020-10-14 04:35:22,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8894 states to 8894 states and 13307 transitions. [2020-10-14 04:35:22,450 INFO L78 Accepts]: Start accepts. Automaton has 8894 states and 13307 transitions. Word has length 143 [2020-10-14 04:35:22,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:35:22,451 INFO L479 AbstractCegarLoop]: Abstraction has 8894 states and 13307 transitions. [2020-10-14 04:35:22,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 04:35:22,451 INFO L276 IsEmpty]: Start isEmpty. Operand 8894 states and 13307 transitions. [2020-10-14 04:35:22,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-14 04:35:22,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:35:22,458 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 04:35:22,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 04:35:22,459 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:35:22,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:35:22,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1408802581, now seen corresponding path program 1 times [2020-10-14 04:35:22,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:35:22,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055687714] [2020-10-14 04:35:22,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:35:22,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:35:22,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:35:22,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:35:23,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:35:23,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-14 04:35:23,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 04:35:23,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1444 [2020-10-14 04:35:23,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:35:23,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:35:23,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 04:35:23,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 117 [2020-10-14 04:35:23,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-14 04:35:23,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:35:24,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:35:24,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:35:24,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:35:24,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:35:24,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:35:24,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:35:24,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 04:35:24,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:35:24,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:35:24,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:35:24,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:35:24,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:35:24,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:35:24,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 04:35:24,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:35:24,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:35:24,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:35:24,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-14 04:35:24,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:35:24,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-14 04:35:24,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:35:24,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:35:24,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 04:35:24,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:35:24,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-14 04:35:24,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:35:24,482 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 04:35:24,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055687714] [2020-10-14 04:35:24,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 04:35:24,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 04:35:24,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965610998] [2020-10-14 04:35:24,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 04:35:24,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:35:24,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 04:35:24,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 04:35:24,486 INFO L87 Difference]: Start difference. First operand 8894 states and 13307 transitions. Second operand 5 states. [2020-10-14 04:36:14,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:36:14,568 INFO L93 Difference]: Finished difference Result 22078 states and 34286 transitions. [2020-10-14 04:36:14,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 04:36:14,571 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 161 [2020-10-14 04:36:14,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:36:14,627 INFO L225 Difference]: With dead ends: 22078 [2020-10-14 04:36:14,627 INFO L226 Difference]: Without dead ends: 13190 [2020-10-14 04:36:14,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-14 04:36:14,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13190 states. [2020-10-14 04:36:14,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13190 to 13141. [2020-10-14 04:36:14,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13141 states. [2020-10-14 04:36:15,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13141 states to 13141 states and 18946 transitions. [2020-10-14 04:36:15,012 INFO L78 Accepts]: Start accepts. Automaton has 13141 states and 18946 transitions. Word has length 161 [2020-10-14 04:36:15,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:36:15,014 INFO L479 AbstractCegarLoop]: Abstraction has 13141 states and 18946 transitions. [2020-10-14 04:36:15,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 04:36:15,014 INFO L276 IsEmpty]: Start isEmpty. Operand 13141 states and 18946 transitions. [2020-10-14 04:36:15,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-14 04:36:15,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:36:15,019 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 04:36:15,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 04:36:15,020 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:36:15,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:36:15,020 INFO L82 PathProgramCache]: Analyzing trace with hash -67604765, now seen corresponding path program 1 times [2020-10-14 04:36:15,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:36:15,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099936426] [2020-10-14 04:36:15,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:36:15,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:36:15,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:36:15,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:36:16,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:36:16,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-14 04:36:16,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 04:36:16,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1522 [2020-10-14 04:36:16,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:36:16,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:36:16,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 04:36:16,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 121 [2020-10-14 04:36:16,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-14 04:36:16,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:36:16,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:36:16,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:36:16,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:36:16,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:36:16,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:36:16,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:36:16,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 04:36:16,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:36:16,835 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:36:16,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:36:16,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:36:16,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:36:16,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:36:16,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 04:36:16,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:36:16,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:36:17,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:36:17,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-14 04:36:17,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:36:17,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-14 04:36:17,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:36:17,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:36:17,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 04:36:17,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:36:17,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-14 04:36:17,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:36:17,079 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 04:36:17,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099936426] [2020-10-14 04:36:17,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 04:36:17,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 04:36:17,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17562272] [2020-10-14 04:36:17,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 04:36:17,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:36:17,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 04:36:17,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 04:36:17,086 INFO L87 Difference]: Start difference. First operand 13141 states and 18946 transitions. Second operand 5 states. [2020-10-14 04:37:20,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:37:20,765 INFO L93 Difference]: Finished difference Result 34756 states and 50965 transitions. [2020-10-14 04:37:20,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 04:37:20,771 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 165 [2020-10-14 04:37:20,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:37:20,870 INFO L225 Difference]: With dead ends: 34756 [2020-10-14 04:37:20,870 INFO L226 Difference]: Without dead ends: 21621 [2020-10-14 04:37:20,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-14 04:37:21,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21621 states. [2020-10-14 04:37:21,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21621 to 21590. [2020-10-14 04:37:21,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21590 states. [2020-10-14 04:37:21,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21590 states to 21590 states and 28691 transitions. [2020-10-14 04:37:21,532 INFO L78 Accepts]: Start accepts. Automaton has 21590 states and 28691 transitions. Word has length 165 [2020-10-14 04:37:21,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:37:21,533 INFO L479 AbstractCegarLoop]: Abstraction has 21590 states and 28691 transitions. [2020-10-14 04:37:21,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 04:37:21,533 INFO L276 IsEmpty]: Start isEmpty. Operand 21590 states and 28691 transitions. [2020-10-14 04:37:21,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-14 04:37:21,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:37:21,538 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 04:37:21,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 04:37:21,538 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:37:21,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:37:21,539 INFO L82 PathProgramCache]: Analyzing trace with hash -955054020, now seen corresponding path program 1 times [2020-10-14 04:37:21,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:37:21,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707913545] [2020-10-14 04:37:21,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:37:21,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:37:21,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:37:21,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:37:22,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:37:22,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:37:22,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-14 04:37:22,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 04:37:22,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1319 [2020-10-14 04:37:22,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:37:22,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:37:22,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 04:37:22,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 137 [2020-10-14 04:37:22,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-14 04:37:22,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:37:23,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:37:23,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:37:23,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:37:23,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:37:23,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:37:23,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:37:23,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 04:37:23,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:37:23,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:37:23,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:37:23,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:37:23,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:37:23,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:37:23,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 04:37:23,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:37:23,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:37:23,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:37:23,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-14 04:37:23,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:37:23,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-14 04:37:23,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:37:23,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:37:23,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 04:37:23,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:37:23,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-14 04:37:23,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 04:37:23,442 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 04:37:23,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707913545] [2020-10-14 04:37:23,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 04:37:23,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 04:37:23,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981071367] [2020-10-14 04:37:23,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 04:37:23,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:37:23,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 04:37:23,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 04:37:23,446 INFO L87 Difference]: Start difference. First operand 21590 states and 28691 transitions. Second operand 6 states.