/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label18.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 18:25:44,349 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 18:25:44,354 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 18:25:44,402 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 18:25:44,403 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 18:25:44,415 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 18:25:44,417 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 18:25:44,421 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 18:25:44,424 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 18:25:44,428 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 18:25:44,430 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 18:25:44,431 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 18:25:44,431 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 18:25:44,434 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 18:25:44,437 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 18:25:44,439 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 18:25:44,441 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 18:25:44,442 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 18:25:44,444 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 18:25:44,454 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 18:25:44,457 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 18:25:44,458 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 18:25:44,460 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 18:25:44,461 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 18:25:44,464 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 18:25:44,464 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 18:25:44,464 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 18:25:44,467 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 18:25:44,468 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 18:25:44,470 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 18:25:44,470 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 18:25:44,472 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 18:25:44,473 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 18:25:44,474 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 18:25:44,475 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 18:25:44,475 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 18:25:44,476 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 18:25:44,476 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 18:25:44,477 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 18:25:44,478 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 18:25:44,479 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 18:25:44,480 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 18:25:44,531 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 18:25:44,531 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 18:25:44,534 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 18:25:44,534 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 18:25:44,534 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 18:25:44,535 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 18:25:44,535 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 18:25:44,535 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 18:25:44,535 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 18:25:44,536 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 18:25:44,537 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 18:25:44,537 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 18:25:44,537 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 18:25:44,538 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 18:25:44,538 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 18:25:44,538 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 18:25:44,538 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 18:25:44,539 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 18:25:44,539 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 18:25:44,539 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 18:25:44,539 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 18:25:44,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:25:44,540 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 18:25:44,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 18:25:44,540 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 18:25:44,540 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 18:25:44,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 18:25:44,541 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 18:25:44,541 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 18:25:44,541 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-24 18:25:44,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 18:25:45,019 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 18:25:45,023 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 18:25:45,027 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 18:25:45,028 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 18:25:45,029 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label18.c [2020-09-24 18:25:45,122 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b76f75957/74efc99e0f114f6b90cac1c50571c8ac/FLAG1416b1839 [2020-09-24 18:25:45,852 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 18:25:45,854 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem11_label18.c [2020-09-24 18:25:45,875 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b76f75957/74efc99e0f114f6b90cac1c50571c8ac/FLAG1416b1839 [2020-09-24 18:25:46,034 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b76f75957/74efc99e0f114f6b90cac1c50571c8ac [2020-09-24 18:25:46,050 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 18:25:46,057 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 18:25:46,061 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 18:25:46,062 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 18:25:46,066 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 18:25:46,067 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:25:46" (1/1) ... [2020-09-24 18:25:46,072 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39c1a6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:25:46, skipping insertion in model container [2020-09-24 18:25:46,073 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:25:46" (1/1) ... [2020-09-24 18:25:46,083 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 18:25:46,165 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 18:25:47,138 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:25:47,152 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 18:25:47,358 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:25:47,382 INFO L208 MainTranslator]: Completed translation [2020-09-24 18:25:47,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:25:47 WrapperNode [2020-09-24 18:25:47,384 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 18:25:47,385 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 18:25:47,385 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 18:25:47,385 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 18:25:47,404 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:25:47" (1/1) ... [2020-09-24 18:25:47,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:25:47" (1/1) ... [2020-09-24 18:25:47,439 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:25:47" (1/1) ... [2020-09-24 18:25:47,440 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:25:47" (1/1) ... [2020-09-24 18:25:47,513 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:25:47" (1/1) ... [2020-09-24 18:25:47,548 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:25:47" (1/1) ... [2020-09-24 18:25:47,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:25:47" (1/1) ... [2020-09-24 18:25:47,583 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 18:25:47,584 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 18:25:47,584 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 18:25:47,585 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 18:25:47,586 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:25:47" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:25:47,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 18:25:47,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 18:25:47,679 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 18:25:47,679 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 18:25:47,679 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 18:25:47,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 18:25:47,680 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 18:25:47,680 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 18:25:47,680 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 18:25:47,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 18:25:47,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 18:25:50,155 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 18:25:50,155 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 18:25:50,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:25:50 BoogieIcfgContainer [2020-09-24 18:25:50,173 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 18:25:50,176 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 18:25:50,176 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 18:25:50,184 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 18:25:50,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 06:25:46" (1/3) ... [2020-09-24 18:25:50,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@603666e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:25:50, skipping insertion in model container [2020-09-24 18:25:50,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:25:47" (2/3) ... [2020-09-24 18:25:50,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@603666e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:25:50, skipping insertion in model container [2020-09-24 18:25:50,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:25:50" (3/3) ... [2020-09-24 18:25:50,191 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label18.c [2020-09-24 18:25:50,203 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 18:25:50,215 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 18:25:50,240 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 18:25:50,275 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 18:25:50,276 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 18:25:50,276 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 18:25:50,276 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 18:25:50,276 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 18:25:50,276 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 18:25:50,277 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 18:25:50,277 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 18:25:50,314 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states. [2020-09-24 18:25:50,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-24 18:25:50,325 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:25:50,327 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] [2020-09-24 18:25:50,328 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:25:50,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:25:50,336 INFO L82 PathProgramCache]: Analyzing trace with hash -123889732, now seen corresponding path program 1 times [2020-09-24 18:25:50,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:25:50,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304820978] [2020-09-24 18:25:50,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:25:50,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:25:50,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:50,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:51,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:51,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:25:51,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 18:25:51,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 18:25:51,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1368 [2020-09-24 18:25:51,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:25:51,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 18:25:51,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 18:25:51,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-24 18:25:51,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-24 18:25:52,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:25:52,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:25:52,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:52,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:25:52,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 18:25:52,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:25:52,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-24 18:25:52,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:25:52,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:25:52,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:25:52,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 18:25:52,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:25:52,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:25:52,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304820978] [2020-09-24 18:25:52,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:25:52,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 18:25:52,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219197474] [2020-09-24 18:25:52,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 18:25:52,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:25:52,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 18:25:52,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 18:25:52,153 INFO L87 Difference]: Start difference. First operand 813 states. Second operand 4 states. [2020-09-24 18:25:56,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:25:56,124 INFO L93 Difference]: Finished difference Result 1921 states and 2518 transitions. [2020-09-24 18:25:56,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 18:25:56,134 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-09-24 18:25:56,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:25:56,182 INFO L225 Difference]: With dead ends: 1921 [2020-09-24 18:25:56,183 INFO L226 Difference]: Without dead ends: 1036 [2020-09-24 18:25:56,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:25:56,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2020-09-24 18:25:56,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 978. [2020-09-24 18:25:56,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 978 states. [2020-09-24 18:25:56,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 1165 transitions. [2020-09-24 18:25:56,325 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 1165 transitions. Word has length 55 [2020-09-24 18:25:56,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:25:56,326 INFO L479 AbstractCegarLoop]: Abstraction has 978 states and 1165 transitions. [2020-09-24 18:25:56,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 18:25:56,326 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 1165 transitions. [2020-09-24 18:25:56,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-09-24 18:25:56,339 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:25:56,339 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:25:56,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 18:25:56,346 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:25:56,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:25:56,346 INFO L82 PathProgramCache]: Analyzing trace with hash 497365935, now seen corresponding path program 1 times [2020-09-24 18:25:56,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:25:56,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495589929] [2020-09-24 18:25:56,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:25:56,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:25:56,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:56,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:58,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:59,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:59,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:59,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:01,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:01,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-09-24 18:26:01,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 18:26:01,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-09-24 18:26:01,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:01,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:26:01,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 99 [2020-09-24 18:26:01,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-24 18:26:01,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:26:01,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:26:01,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:01,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:01,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:01,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 18:26:01,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:01,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 18:26:01,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:01,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:26:01,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:26:01,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:26:01,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:26:01,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-24 18:26:01,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:01,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:01,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:01,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-24 18:26:01,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:01,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-09-24 18:26:01,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:01,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:26:01,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:26:01,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-09-24 18:26:01,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-09-24 18:26:01,814 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:26:01,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495589929] [2020-09-24 18:26:01,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:26:01,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 18:26:01,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250116698] [2020-09-24 18:26:01,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:26:01,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:26:01,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:26:01,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:26:01,822 INFO L87 Difference]: Start difference. First operand 978 states and 1165 transitions. Second operand 5 states. [2020-09-24 18:26:05,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:26:05,496 INFO L93 Difference]: Finished difference Result 2001 states and 2457 transitions. [2020-09-24 18:26:05,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 18:26:05,496 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 137 [2020-09-24 18:26:05,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:26:05,504 INFO L225 Difference]: With dead ends: 2001 [2020-09-24 18:26:05,504 INFO L226 Difference]: Without dead ends: 1267 [2020-09-24 18:26:05,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-24 18:26:05,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2020-09-24 18:26:05,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1224. [2020-09-24 18:26:05,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1224 states. [2020-09-24 18:26:05,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 1517 transitions. [2020-09-24 18:26:05,546 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 1517 transitions. Word has length 137 [2020-09-24 18:26:05,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:26:05,547 INFO L479 AbstractCegarLoop]: Abstraction has 1224 states and 1517 transitions. [2020-09-24 18:26:05,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:26:05,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 1517 transitions. [2020-09-24 18:26:05,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-09-24 18:26:05,551 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:26:05,552 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:26:05,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 18:26:05,552 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:26:05,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:26:05,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1536608329, now seen corresponding path program 1 times [2020-09-24 18:26:05,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:26:05,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797423713] [2020-09-24 18:26:05,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:26:05,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:05,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:05,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:05,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:05,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:07,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:07,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:10,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:10,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:10,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-09-24 18:26:10,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 18:26:10,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-24 18:26:10,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:10,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:26:10,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 101 [2020-09-24 18:26:10,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-24 18:26:10,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:26:10,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:26:10,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:10,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:10,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:10,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 18:26:10,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:10,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 18:26:10,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:10,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:26:10,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:26:10,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:26:10,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:26:10,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-24 18:26:10,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:10,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:10,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:10,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-24 18:26:10,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:10,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-09-24 18:26:10,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:10,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:26:10,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:26:10,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-09-24 18:26:10,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:26:10,989 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:26:10,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797423713] [2020-09-24 18:26:10,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:26:10,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 18:26:10,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131084436] [2020-09-24 18:26:10,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:26:10,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:26:10,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:26:10,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:26:10,995 INFO L87 Difference]: Start difference. First operand 1224 states and 1517 transitions. Second operand 5 states. [2020-09-24 18:26:14,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:26:14,588 INFO L93 Difference]: Finished difference Result 3058 states and 3952 transitions. [2020-09-24 18:26:14,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 18:26:14,589 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 139 [2020-09-24 18:26:14,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:26:14,601 INFO L225 Difference]: With dead ends: 3058 [2020-09-24 18:26:14,602 INFO L226 Difference]: Without dead ends: 1851 [2020-09-24 18:26:14,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-24 18:26:14,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1851 states. [2020-09-24 18:26:14,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1851 to 1829. [2020-09-24 18:26:14,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1829 states. [2020-09-24 18:26:14,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1829 states to 1829 states and 2302 transitions. [2020-09-24 18:26:14,718 INFO L78 Accepts]: Start accepts. Automaton has 1829 states and 2302 transitions. Word has length 139 [2020-09-24 18:26:14,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:26:14,719 INFO L479 AbstractCegarLoop]: Abstraction has 1829 states and 2302 transitions. [2020-09-24 18:26:14,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:26:14,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1829 states and 2302 transitions. [2020-09-24 18:26:14,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-09-24 18:26:14,724 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:26:14,725 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:26:14,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 18:26:14,730 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:26:14,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:26:14,731 INFO L82 PathProgramCache]: Analyzing trace with hash -578651405, now seen corresponding path program 1 times [2020-09-24 18:26:14,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:26:14,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [432930439] [2020-09-24 18:26:14,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:26:14,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:14,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:14,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:15,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:15,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:15,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:17,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:17,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-09-24 18:26:17,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 18:26:17,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2812 [2020-09-24 18:26:17,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:17,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:26:17,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 130 [2020-09-24 18:26:17,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-24 18:26:17,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:26:17,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:26:17,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:17,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:17,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:17,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 18:26:17,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:17,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 18:26:17,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:17,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:26:17,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:26:17,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:26:17,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:26:17,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-24 18:26:17,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:17,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:17,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:17,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-09-24 18:26:17,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:17,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-09-24 18:26:17,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:17,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:26:17,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:26:17,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-09-24 18:26:17,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:26:17,877 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:26:17,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [432930439] [2020-09-24 18:26:17,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:26:17,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 18:26:17,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815331872] [2020-09-24 18:26:17,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:26:17,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:26:17,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:26:17,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:26:17,881 INFO L87 Difference]: Start difference. First operand 1829 states and 2302 transitions. Second operand 5 states. [2020-09-24 18:26:22,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:26:22,407 INFO L93 Difference]: Finished difference Result 4810 states and 6247 transitions. [2020-09-24 18:26:22,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 18:26:22,408 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 166 [2020-09-24 18:26:22,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:26:22,426 INFO L225 Difference]: With dead ends: 4810 [2020-09-24 18:26:22,426 INFO L226 Difference]: Without dead ends: 2998 [2020-09-24 18:26:22,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-24 18:26:22,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2998 states. [2020-09-24 18:26:22,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2998 to 2833. [2020-09-24 18:26:22,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2833 states. [2020-09-24 18:26:22,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2833 states to 2833 states and 3526 transitions. [2020-09-24 18:26:22,527 INFO L78 Accepts]: Start accepts. Automaton has 2833 states and 3526 transitions. Word has length 166 [2020-09-24 18:26:22,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:26:22,527 INFO L479 AbstractCegarLoop]: Abstraction has 2833 states and 3526 transitions. [2020-09-24 18:26:22,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:26:22,528 INFO L276 IsEmpty]: Start isEmpty. Operand 2833 states and 3526 transitions. [2020-09-24 18:26:22,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-09-24 18:26:22,536 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:26:22,536 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-24 18:26:22,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 18:26:22,536 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:26:22,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:26:22,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1900773636, now seen corresponding path program 1 times [2020-09-24 18:26:22,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:26:22,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927715647] [2020-09-24 18:26:22,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:26:22,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:22,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:22,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:23,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:23,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:23,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:23,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:23,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:23,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:26,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:27,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:27,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:27,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 249 [2020-09-24 18:26:27,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 18:26:27,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-09-24 18:26:27,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:27,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:26:27,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 103 [2020-09-24 18:26:27,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-09-24 18:26:27,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:26:27,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:26:27,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:27,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:27,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:27,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 18:26:27,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:27,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 18:26:27,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:27,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:26:27,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:26:27,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:26:27,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:26:27,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-24 18:26:27,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:27,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:27,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:27,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-24 18:26:27,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:27,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-09-24 18:26:27,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:27,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:26:27,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:26:27,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 18:26:27,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:26:27,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-09-24 18:26:27,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:27,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:28,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:28,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-09-24 18:26:28,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:28,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-09-24 18:26:28,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:28,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:26:28,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 18:26:28,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-09-24 18:26:28,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:26:28,346 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 150 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 18:26:28,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927715647] [2020-09-24 18:26:28,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:26:28,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 18:26:28,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409317332] [2020-09-24 18:26:28,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 18:26:28,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:26:28,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 18:26:28,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:26:28,350 INFO L87 Difference]: Start difference. First operand 2833 states and 3526 transitions. Second operand 7 states.