/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=0.6 --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 language data_model -i ../../../trunk/examples/svcomp/array-fpi/res1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 09:15:26,280 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 09:15:26,283 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 09:15:26,338 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 09:15:26,339 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 09:15:26,347 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 09:15:26,350 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 09:15:26,355 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 09:15:26,359 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 09:15:26,367 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 09:15:26,368 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 09:15:26,370 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 09:15:26,370 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 09:15:26,374 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 09:15:26,378 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 09:15:26,379 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 09:15:26,380 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 09:15:26,381 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 09:15:26,383 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 09:15:26,385 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 09:15:26,387 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 09:15:26,389 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 09:15:26,390 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 09:15:26,391 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 09:15:26,394 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 09:15:26,395 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 09:15:26,395 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 09:15:26,396 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 09:15:26,397 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 09:15:26,398 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 09:15:26,398 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 09:15:26,399 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 09:15:26,400 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 09:15:26,401 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 09:15:26,402 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 09:15:26,403 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 09:15:26,404 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 09:15:26,404 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 09:15:26,404 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 09:15:26,405 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 09:15:26,406 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 09:15:26,408 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 [2020-10-28 09:15:26,443 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 09:15:26,444 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 09:15:26,447 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 09:15:26,448 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 09:15:26,448 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 09:15:26,448 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 09:15:26,448 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 09:15:26,448 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 09:15:26,449 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 09:15:26,449 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 09:15:26,451 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 09:15:26,451 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 09:15:26,451 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 09:15:26,452 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 09:15:26,452 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 09:15:26,452 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 09:15:26,452 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 09:15:26,452 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 09:15:26,453 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 09:15:26,453 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 09:15:26,453 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 09:15:26,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:15:26,453 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 09:15:26,454 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 09:15:26,454 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 09:15:26,454 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 09:15:26,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 09:15:26,454 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 09:15:26,455 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 09:15:26,455 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 09:15:26,872 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 09:15:26,912 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 09:15:26,916 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 09:15:26,918 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 09:15:26,919 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 09:15:26,921 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/res1.c [2020-10-28 09:15:27,024 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5ba85e553/0425ee3de9a44029938851779bcc746a/FLAG2ace5797a [2020-10-28 09:15:27,634 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 09:15:27,635 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/res1.c [2020-10-28 09:15:27,655 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5ba85e553/0425ee3de9a44029938851779bcc746a/FLAG2ace5797a [2020-10-28 09:15:27,995 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5ba85e553/0425ee3de9a44029938851779bcc746a [2020-10-28 09:15:28,005 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 09:15:28,014 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 09:15:28,019 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 09:15:28,019 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 09:15:28,023 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 09:15:28,024 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:15:28" (1/1) ... [2020-10-28 09:15:28,028 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cd818d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:15:28, skipping insertion in model container [2020-10-28 09:15:28,028 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:15:28" (1/1) ... [2020-10-28 09:15:28,037 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 09:15:28,058 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 09:15:28,230 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:15:28,241 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 09:15:28,269 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:15:28,287 INFO L208 MainTranslator]: Completed translation [2020-10-28 09:15:28,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:15:28 WrapperNode [2020-10-28 09:15:28,288 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 09:15:28,290 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 09:15:28,290 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 09:15:28,290 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 09:15:28,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:15:28" (1/1) ... [2020-10-28 09:15:28,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:15:28" (1/1) ... [2020-10-28 09:15:28,315 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:15:28" (1/1) ... [2020-10-28 09:15:28,315 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:15:28" (1/1) ... [2020-10-28 09:15:28,326 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:15:28" (1/1) ... [2020-10-28 09:15:28,332 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:15:28" (1/1) ... [2020-10-28 09:15:28,334 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:15:28" (1/1) ... [2020-10-28 09:15:28,337 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 09:15:28,339 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 09:15:28,339 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 09:15:28,339 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 09:15:28,340 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:15:28" (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 [2020-10-28 09:15:28,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 09:15:28,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 09:15:28,456 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 09:15:28,457 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 09:15:28,457 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 09:15:28,458 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 09:15:28,458 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 09:15:28,458 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 09:15:28,459 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 09:15:28,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 09:15:28,460 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 09:15:28,461 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 09:15:28,461 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 09:15:28,461 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 09:15:28,461 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 09:15:28,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 09:15:28,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 09:15:28,463 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 09:15:28,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 09:15:28,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 09:15:28,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 09:15:28,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 09:15:28,994 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 09:15:28,995 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-28 09:15:28,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:15:28 BoogieIcfgContainer [2020-10-28 09:15:28,997 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 09:15:29,000 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 09:15:29,000 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 09:15:29,004 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 09:15:29,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:15:28" (1/3) ... [2020-10-28 09:15:29,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e50ddcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:15:29, skipping insertion in model container [2020-10-28 09:15:29,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:15:28" (2/3) ... [2020-10-28 09:15:29,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e50ddcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:15:29, skipping insertion in model container [2020-10-28 09:15:29,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:15:28" (3/3) ... [2020-10-28 09:15:29,009 INFO L111 eAbstractionObserver]: Analyzing ICFG res1.c [2020-10-28 09:15:29,022 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 09:15:29,028 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 09:15:29,042 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 09:15:29,070 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 09:15:29,070 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 09:15:29,070 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 09:15:29,071 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 09:15:29,071 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 09:15:29,071 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 09:15:29,071 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 09:15:29,071 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 09:15:29,091 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-10-28 09:15:29,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 09:15:29,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:15:29,099 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] [2020-10-28 09:15:29,099 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:15:29,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:15:29,106 INFO L82 PathProgramCache]: Analyzing trace with hash -181434534, now seen corresponding path program 1 times [2020-10-28 09:15:29,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:15:29,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227000806] [2020-10-28 09:15:29,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:15:29,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:29,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:29,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:29,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:29,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:29,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:30,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:32,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:32,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 09:15:32,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:15:32,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2824 [2020-10-28 09:15:32,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:32,101 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:32,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:32,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 09:15:32,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:32,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 09:15:32,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:15:32,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:32,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:32,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:32,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:15:32,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:32,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 09:15:32,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:32,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:32,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:32,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:32,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:32,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:15:32,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:15:32,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:32,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:32,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:32,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:32,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:32,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:15:32,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:32,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:32,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:32,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-28 09:15:32,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:32,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:15:32,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:15:32,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227000806] [2020-10-28 09:15:32,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:15:32,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 09:15:32,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053544951] [2020-10-28 09:15:32,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 09:15:32,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:15:32,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 09:15:32,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:15:32,301 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2020-10-28 09:15:32,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:15:32,479 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2020-10-28 09:15:32,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 09:15:32,482 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-10-28 09:15:32,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:15:32,491 INFO L225 Difference]: With dead ends: 69 [2020-10-28 09:15:32,492 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 09:15:32,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:15:32,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 09:15:32,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-28 09:15:32,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-28 09:15:32,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-10-28 09:15:32,544 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 26 [2020-10-28 09:15:32,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:15:32,545 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-10-28 09:15:32,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 09:15:32,545 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-10-28 09:15:32,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 09:15:32,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:15:32,547 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] [2020-10-28 09:15:32,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 09:15:32,547 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:15:32,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:15:32,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1769782436, now seen corresponding path program 1 times [2020-10-28 09:15:32,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:15:32,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [789571575] [2020-10-28 09:15:32,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:15:32,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:32,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:32,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:32,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:32,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:32,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:34,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:34,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 09:15:34,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:15:34,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1868 [2020-10-28 09:15:34,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:34,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:34,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 09:15:34,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:15:34,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 09:15:34,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:15:34,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:15:34,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:34,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:34,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:34,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:15:34,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:34,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:15:34,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:34,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:34,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:34,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:34,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:34,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:15:34,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:15:34,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:34,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:34,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:34,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:34,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:34,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:15:34,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:34,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:34,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:15:34,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:34,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:15:34,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:15:34,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:15:34,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [789571575] [2020-10-28 09:15:34,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:15:34,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 09:15:34,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589811337] [2020-10-28 09:15:34,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 09:15:34,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:15:34,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 09:15:34,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:15:34,563 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 5 states. [2020-10-28 09:15:34,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:15:34,775 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2020-10-28 09:15:34,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 09:15:34,775 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-10-28 09:15:34,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:15:34,777 INFO L225 Difference]: With dead ends: 51 [2020-10-28 09:15:34,777 INFO L226 Difference]: Without dead ends: 35 [2020-10-28 09:15:34,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:15:34,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-28 09:15:34,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-28 09:15:34,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-28 09:15:34,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-10-28 09:15:34,789 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 26 [2020-10-28 09:15:34,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:15:34,790 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-10-28 09:15:34,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 09:15:34,790 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-10-28 09:15:34,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 09:15:34,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:15:34,791 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] [2020-10-28 09:15:34,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 09:15:34,792 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:15:34,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:15:34,793 INFO L82 PathProgramCache]: Analyzing trace with hash -697842092, now seen corresponding path program 1 times [2020-10-28 09:15:34,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:15:34,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711931394] [2020-10-28 09:15:34,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:15:34,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:34,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:35,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:35,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:35,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:36,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:36,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:37,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:37,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:37,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:38,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:38,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:39,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:39,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:39,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 09:15:39,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 09:15:39,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5122 [2020-10-28 09:15:39,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:39,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:39,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 09:15:39,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:15:39,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 09:15:39,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:40,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:15:40,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:40,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:40,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:40,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:15:40,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:40,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:15:40,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:40,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:40,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:40,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:40,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:40,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:15:40,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:15:40,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:40,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:40,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:40,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:40,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:40,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:15:40,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:40,844 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:40,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:40,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:40,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:40,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:15:40,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:15:40,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711931394] [2020-10-28 09:15:40,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:15:40,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 09:15:40,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622073022] [2020-10-28 09:15:40,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 09:15:40,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:15:40,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 09:15:40,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:15:40,861 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 18 states. [2020-10-28 09:15:41,811 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-10-28 09:15:41,965 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-10-28 09:15:42,100 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-10-28 09:15:42,269 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-10-28 09:15:42,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:15:42,962 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-10-28 09:15:42,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 09:15:42,963 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2020-10-28 09:15:42,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:15:42,967 INFO L225 Difference]: With dead ends: 51 [2020-10-28 09:15:42,967 INFO L226 Difference]: Without dead ends: 44 [2020-10-28 09:15:42,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=208, Invalid=982, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 09:15:42,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-28 09:15:42,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-10-28 09:15:42,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 09:15:42,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-28 09:15:42,979 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 34 [2020-10-28 09:15:42,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:15:42,980 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-28 09:15:42,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 09:15:42,980 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-28 09:15:42,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 09:15:42,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:15:42,982 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 09:15:42,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 09:15:42,982 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:15:42,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:15:42,983 INFO L82 PathProgramCache]: Analyzing trace with hash 583184370, now seen corresponding path program 2 times [2020-10-28 09:15:42,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:15:42,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599316517] [2020-10-28 09:15:42,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:15:43,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:43,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:43,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:43,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:45,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:45,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 09:15:45,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:15:45,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2906 [2020-10-28 09:15:45,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:45,910 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:45,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:15:45,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:15:45,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 09:15:45,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:45,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:15:45,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:45,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:46,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:46,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:15:46,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:46,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:15:46,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:46,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:46,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:46,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:46,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:46,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:46,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:15:46,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:46,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:46,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:46,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:46,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:46,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:15:46,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:46,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:46,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:46,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:46,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:46,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:46,018 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:15:46,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599316517] [2020-10-28 09:15:46,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:15:46,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:15:46,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758047154] [2020-10-28 09:15:46,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:15:46,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:15:46,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:15:46,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:15:46,021 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 8 states. [2020-10-28 09:15:46,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:15:46,285 INFO L93 Difference]: Finished difference Result 88 states and 99 transitions. [2020-10-28 09:15:46,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:15:46,285 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-28 09:15:46,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:15:46,287 INFO L225 Difference]: With dead ends: 88 [2020-10-28 09:15:46,287 INFO L226 Difference]: Without dead ends: 54 [2020-10-28 09:15:46,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:15:46,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-28 09:15:46,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2020-10-28 09:15:46,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-28 09:15:46,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-10-28 09:15:46,298 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 36 [2020-10-28 09:15:46,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:15:46,298 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-10-28 09:15:46,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:15:46,298 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-10-28 09:15:46,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 09:15:46,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:15:46,300 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:15:46,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 09:15:46,300 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:15:46,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:15:46,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1955539410, now seen corresponding path program 3 times [2020-10-28 09:15:46,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:15:46,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090184249] [2020-10-28 09:15:46,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:15:46,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:46,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:46,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:46,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:47,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:48,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:48,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:49,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:49,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:50,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:50,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:51,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:51,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:51,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 09:15:51,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 09:15:51,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-28 09:15:51,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:51,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:51,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:15:51,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:15:51,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 09:15:51,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 09:15:51,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:15:51,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:51,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:51,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:51,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:15:51,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:51,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:15:51,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:51,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:51,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:51,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:51,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:51,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:51,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:15:51,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:51,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:51,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:51,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:51,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:51,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:15:51,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:51,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:51,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:51,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:51,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:51,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:51,465 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 09:15:51,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090184249] [2020-10-28 09:15:51,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:15:51,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:15:51,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743410164] [2020-10-28 09:15:51,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:15:51,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:15:51,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:15:51,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:15:51,469 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 8 states. [2020-10-28 09:15:51,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:15:51,726 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2020-10-28 09:15:51,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:15:51,726 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-10-28 09:15:51,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:15:51,728 INFO L225 Difference]: With dead ends: 50 [2020-10-28 09:15:51,728 INFO L226 Difference]: Without dead ends: 43 [2020-10-28 09:15:51,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:15:51,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-28 09:15:51,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-28 09:15:51,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-28 09:15:51,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-10-28 09:15:51,737 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 40 [2020-10-28 09:15:51,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:15:51,737 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-10-28 09:15:51,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:15:51,738 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-10-28 09:15:51,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 09:15:51,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:15:51,739 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 09:15:51,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 09:15:51,739 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:15:51,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:15:51,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1178128052, now seen corresponding path program 4 times [2020-10-28 09:15:51,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:15:51,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1293091738] [2020-10-28 09:15:51,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:15:51,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:51,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:52,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:52,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:53,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:53,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:54,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:54,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:55,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:55,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:56,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:56,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:56,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 09:15:56,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 09:15:56,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 09:15:56,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:56,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:56,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 09:15:56,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:15:56,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 09:15:56,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:57,250 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-10-28 09:15:57,823 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 59 [2020-10-28 09:15:57,987 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 50 [2020-10-28 09:15:58,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:15:58,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:58,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:58,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:58,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:15:58,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:58,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:15:58,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:58,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:58,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:58,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:58,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:58,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:58,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:15:58,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:58,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:58,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:58,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:58,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:58,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:15:58,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:58,994 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:58,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:58,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:58,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:58,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:59,017 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:15:59,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1293091738] [2020-10-28 09:15:59,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:15:59,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 09:15:59,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320613804] [2020-10-28 09:15:59,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 09:15:59,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:15:59,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 09:15:59,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:15:59,020 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 25 states. [2020-10-28 09:15:59,667 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 46 [2020-10-28 09:15:59,952 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 53 [2020-10-28 09:16:00,135 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2020-10-28 09:16:00,455 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 45 [2020-10-28 09:16:00,805 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 45 [2020-10-28 09:16:00,987 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2020-10-28 09:16:01,254 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 51 [2020-10-28 09:16:01,429 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-10-28 09:16:01,658 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 55 [2020-10-28 09:16:02,017 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2020-10-28 09:16:02,264 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 66 [2020-10-28 09:16:02,491 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 75 [2020-10-28 09:16:02,692 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 56 [2020-10-28 09:16:02,921 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2020-10-28 09:16:03,207 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2020-10-28 09:16:04,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:16:04,080 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2020-10-28 09:16:04,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-28 09:16:04,086 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 42 [2020-10-28 09:16:04,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:16:04,087 INFO L225 Difference]: With dead ends: 66 [2020-10-28 09:16:04,088 INFO L226 Difference]: Without dead ends: 59 [2020-10-28 09:16:04,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=375, Invalid=2487, Unknown=0, NotChecked=0, Total=2862 [2020-10-28 09:16:04,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-28 09:16:04,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2020-10-28 09:16:04,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 09:16:04,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-10-28 09:16:04,102 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 42 [2020-10-28 09:16:04,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:16:04,102 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-10-28 09:16:04,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 09:16:04,103 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-10-28 09:16:04,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 09:16:04,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:16:04,104 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-28 09:16:04,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 09:16:04,104 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:16:04,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:16:04,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1410122518, now seen corresponding path program 5 times [2020-10-28 09:16:04,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:16:04,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624589214] [2020-10-28 09:16:04,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:16:04,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:04,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:04,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:04,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:09,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:09,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 09:16:09,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:16:09,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 09:16:09,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:09,129 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:09,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:16:09,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:16:09,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 09:16:09,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:09,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:16:09,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:09,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:09,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:09,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:16:09,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:09,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:16:09,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:09,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:09,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:09,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:09,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:09,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:09,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:16:09,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:09,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:09,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:09,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:09,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:09,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:16:09,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:09,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:09,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:09,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:09,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:09,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:09,247 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 09:16:09,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624589214] [2020-10-28 09:16:09,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:16:09,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:16:09,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792685510] [2020-10-28 09:16:09,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:16:09,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:16:09,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:16:09,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:16:09,250 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 10 states. [2020-10-28 09:16:09,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:16:09,621 INFO L93 Difference]: Finished difference Result 106 states and 117 transitions. [2020-10-28 09:16:09,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 09:16:09,622 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2020-10-28 09:16:09,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:16:09,623 INFO L225 Difference]: With dead ends: 106 [2020-10-28 09:16:09,623 INFO L226 Difference]: Without dead ends: 62 [2020-10-28 09:16:09,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:16:09,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-28 09:16:09,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 49. [2020-10-28 09:16:09,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-28 09:16:09,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-10-28 09:16:09,636 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 44 [2020-10-28 09:16:09,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:16:09,636 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-10-28 09:16:09,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:16:09,636 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-10-28 09:16:09,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 09:16:09,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:16:09,637 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2020-10-28 09:16:09,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 09:16:09,638 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:16:09,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:16:09,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1239709914, now seen corresponding path program 6 times [2020-10-28 09:16:09,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:16:09,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1237882824] [2020-10-28 09:16:09,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:16:09,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:09,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:09,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:09,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:14,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:14,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 09:16:14,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:16:14,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 09:16:14,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:14,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:14,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:16:14,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:16:14,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 09:16:14,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:14,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:16:14,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:14,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:14,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:14,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:16:14,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:14,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:16:14,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:14,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:14,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:14,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:14,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:14,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:14,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:16:14,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:14,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:14,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:14,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:14,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:14,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:16:14,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:14,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:14,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:14,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:14,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:14,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:14,792 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-28 09:16:14,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1237882824] [2020-10-28 09:16:14,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:16:14,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:16:14,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370656037] [2020-10-28 09:16:14,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:16:14,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:16:14,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:16:14,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:16:14,796 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 10 states. [2020-10-28 09:16:15,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:16:15,178 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2020-10-28 09:16:15,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 09:16:15,181 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2020-10-28 09:16:15,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:16:15,182 INFO L225 Difference]: With dead ends: 58 [2020-10-28 09:16:15,182 INFO L226 Difference]: Without dead ends: 51 [2020-10-28 09:16:15,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:16:15,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-28 09:16:15,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-28 09:16:15,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-28 09:16:15,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-10-28 09:16:15,204 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 48 [2020-10-28 09:16:15,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:16:15,205 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-10-28 09:16:15,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:16:15,206 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-10-28 09:16:15,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 09:16:15,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:16:15,208 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:16:15,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 09:16:15,208 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:16:15,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:16:15,209 INFO L82 PathProgramCache]: Analyzing trace with hash -460749756, now seen corresponding path program 7 times [2020-10-28 09:16:15,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:16:15,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969204415] [2020-10-28 09:16:15,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:16:15,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:15,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:15,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:16,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:17,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:18,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:19,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:20,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:20,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:20,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 09:16:20,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:16:20,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5290 [2020-10-28 09:16:20,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:20,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:20,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-28 09:16:20,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:16:20,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 09:16:20,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:21,548 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-10-28 09:16:21,713 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-10-28 09:16:21,896 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2020-10-28 09:16:22,080 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2020-10-28 09:16:22,270 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2020-10-28 09:16:22,579 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2020-10-28 09:16:22,766 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 63 [2020-10-28 09:16:23,093 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2020-10-28 09:16:24,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:16:24,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:24,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:24,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:24,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:16:24,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:24,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:16:24,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:24,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:24,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:24,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:24,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:24,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:24,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:16:24,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:24,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:24,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:24,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:24,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:24,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:16:24,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:24,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:24,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:24,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:24,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:24,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:24,422 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:16:24,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969204415] [2020-10-28 09:16:24,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:16:24,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-28 09:16:24,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260835278] [2020-10-28 09:16:24,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-28 09:16:24,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:16:24,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-28 09:16:24,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1017, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 09:16:24,425 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 34 states. [2020-10-28 09:16:25,275 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2020-10-28 09:16:25,790 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 75 [2020-10-28 09:16:25,980 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 47 [2020-10-28 09:16:26,184 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2020-10-28 09:16:26,434 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 54 [2020-10-28 09:16:26,649 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2020-10-28 09:16:26,887 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 50 [2020-10-28 09:16:27,123 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 52 [2020-10-28 09:16:27,382 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2020-10-28 09:16:27,605 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2020-10-28 09:16:27,877 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2020-10-28 09:16:28,126 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 58 [2020-10-28 09:16:28,339 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2020-10-28 09:16:28,605 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 60 [2020-10-28 09:16:28,949 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 67 [2020-10-28 09:16:29,441 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 91 [2020-10-28 09:16:29,752 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 60 [2020-10-28 09:16:30,015 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 63 [2020-10-28 09:16:30,217 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 51 [2020-10-28 09:16:30,580 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 47 [2020-10-28 09:16:30,944 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-28 09:16:31,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:16:31,996 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2020-10-28 09:16:31,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-28 09:16:31,997 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 50 [2020-10-28 09:16:31,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:16:31,998 INFO L225 Difference]: With dead ends: 77 [2020-10-28 09:16:31,998 INFO L226 Difference]: Without dead ends: 70 [2020-10-28 09:16:32,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=586, Invalid=3970, Unknown=0, NotChecked=0, Total=4556 [2020-10-28 09:16:32,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-28 09:16:32,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-10-28 09:16:32,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-28 09:16:32,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2020-10-28 09:16:32,015 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 50 [2020-10-28 09:16:32,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:16:32,016 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2020-10-28 09:16:32,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-28 09:16:32,016 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2020-10-28 09:16:32,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 09:16:32,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:16:32,017 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:16:32,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 09:16:32,017 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:16:32,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:16:32,018 INFO L82 PathProgramCache]: Analyzing trace with hash 795652578, now seen corresponding path program 8 times [2020-10-28 09:16:32,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:16:32,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936036806] [2020-10-28 09:16:32,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:16:32,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:32,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:32,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:32,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:37,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:37,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 09:16:37,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:16:37,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:16:37,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:37,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:37,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:16:37,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:16:37,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 09:16:37,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:37,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:16:37,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:37,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:37,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:37,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:16:37,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:37,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:16:37,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:37,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:37,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:37,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:37,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:37,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:37,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:16:37,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:37,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:37,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:37,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:37,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:37,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:16:37,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:37,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:37,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:37,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:37,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:37,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:37,194 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-28 09:16:37,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936036806] [2020-10-28 09:16:37,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:16:37,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:16:37,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900650859] [2020-10-28 09:16:37,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:16:37,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:16:37,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:16:37,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:16:37,197 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand 12 states. [2020-10-28 09:16:37,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:16:37,670 INFO L93 Difference]: Finished difference Result 127 states and 138 transitions. [2020-10-28 09:16:37,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 09:16:37,671 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2020-10-28 09:16:37,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:16:37,672 INFO L225 Difference]: With dead ends: 127 [2020-10-28 09:16:37,672 INFO L226 Difference]: Without dead ends: 78 [2020-10-28 09:16:37,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:16:37,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-28 09:16:37,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 65. [2020-10-28 09:16:37,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-28 09:16:37,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2020-10-28 09:16:37,690 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 52 [2020-10-28 09:16:37,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:16:37,691 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2020-10-28 09:16:37,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:16:37,691 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2020-10-28 09:16:37,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 09:16:37,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:16:37,692 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:16:37,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 09:16:37,693 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:16:37,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:16:37,693 INFO L82 PathProgramCache]: Analyzing trace with hash -710442688, now seen corresponding path program 9 times [2020-10-28 09:16:37,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:16:37,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395772532] [2020-10-28 09:16:37,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:16:37,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:37,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:37,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:37,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:39,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:42,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:42,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:42,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:42,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 09:16:42,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:16:42,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5089 [2020-10-28 09:16:42,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:42,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:42,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:16:42,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:16:42,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 09:16:42,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:42,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:16:42,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:42,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:42,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:42,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:16:42,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:42,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:16:42,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:42,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:42,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:42,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:42,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:42,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:42,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:16:42,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:42,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:42,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:42,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:42,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:42,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:16:42,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:42,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:42,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:42,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:42,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:42,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:42,963 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-28 09:16:42,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395772532] [2020-10-28 09:16:42,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:16:42,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:16:42,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119814005] [2020-10-28 09:16:42,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:16:42,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:16:42,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:16:42,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:16:42,965 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 12 states. [2020-10-28 09:16:43,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:16:43,491 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2020-10-28 09:16:43,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:16:43,492 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 54 [2020-10-28 09:16:43,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:16:43,493 INFO L225 Difference]: With dead ends: 74 [2020-10-28 09:16:43,493 INFO L226 Difference]: Without dead ends: 59 [2020-10-28 09:16:43,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:16:43,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-28 09:16:43,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-28 09:16:43,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-28 09:16:43,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-10-28 09:16:43,522 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 54 [2020-10-28 09:16:43,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:16:43,522 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-10-28 09:16:43,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:16:43,523 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-10-28 09:16:43,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 09:16:43,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:16:43,525 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:16:43,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 09:16:43,525 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:16:43,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:16:43,528 INFO L82 PathProgramCache]: Analyzing trace with hash 76988220, now seen corresponding path program 10 times [2020-10-28 09:16:43,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:16:43,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707908375] [2020-10-28 09:16:43,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:16:43,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:43,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:44,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:45,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:46,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:47,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:48,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:48,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 09:16:48,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:16:48,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 09:16:48,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:48,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:48,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-28 09:16:48,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:16:48,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 09:16:48,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:49,468 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-28 09:16:49,745 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-10-28 09:16:49,914 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-10-28 09:16:50,084 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2020-10-28 09:16:50,311 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-10-28 09:16:50,563 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2020-10-28 09:16:50,810 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2020-10-28 09:16:51,011 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2020-10-28 09:16:51,360 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 72 [2020-10-28 09:16:51,651 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 65 [2020-10-28 09:16:51,975 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 75 [2020-10-28 09:16:52,248 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 63 [2020-10-28 09:16:52,509 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2020-10-28 09:16:52,730 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2020-10-28 09:16:52,966 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2020-10-28 09:16:53,163 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2020-10-28 09:16:53,351 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2020-10-28 09:16:54,435 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 42 [2020-10-28 09:16:55,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:16:55,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:55,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:55,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:55,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:16:55,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:55,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:16:55,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:55,132 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:55,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:55,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:55,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:55,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:55,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:16:55,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:55,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:55,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:55,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:55,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:55,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:16:55,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:55,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:55,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:55,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:55,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:55,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:55,185 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:16:55,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707908375] [2020-10-28 09:16:55,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:16:55,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-28 09:16:55,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301614915] [2020-10-28 09:16:55,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-28 09:16:55,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:16:55,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-28 09:16:55,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1481, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 09:16:55,188 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 41 states. [2020-10-28 09:16:55,934 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2020-10-28 09:16:56,233 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 67 [2020-10-28 09:16:56,609 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 78 [2020-10-28 09:16:56,947 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 70 [2020-10-28 09:16:57,232 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2020-10-28 09:16:57,658 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 78 [2020-10-28 09:16:57,927 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2020-10-28 09:16:58,337 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 82 [2020-10-28 09:16:58,748 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 80 [2020-10-28 09:16:58,974 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 54 [2020-10-28 09:16:59,265 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 55 [2020-10-28 09:16:59,741 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 80 [2020-10-28 09:17:00,194 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 77 [2020-10-28 09:17:00,703 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 71 [2020-10-28 09:17:01,349 WARN L193 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 69 [2020-10-28 09:17:01,840 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 71 [2020-10-28 09:17:02,398 WARN L193 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 70 [2020-10-28 09:17:02,842 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 73 [2020-10-28 09:17:03,453 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 95 [2020-10-28 09:17:03,972 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 69 [2020-10-28 09:17:04,379 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 78 [2020-10-28 09:17:04,629 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 68 [2020-10-28 09:17:04,885 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 75 [2020-10-28 09:17:05,104 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2020-10-28 09:17:05,320 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 60 [2020-10-28 09:17:05,532 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2020-10-28 09:17:05,958 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2020-10-28 09:17:06,206 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 62 [2020-10-28 09:17:06,515 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 90 [2020-10-28 09:17:06,829 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 80 [2020-10-28 09:17:07,183 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-10-28 09:17:07,461 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 76 [2020-10-28 09:17:07,786 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 81 [2020-10-28 09:17:08,078 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 58 [2020-10-28 09:17:08,339 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-28 09:17:08,695 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 87 [2020-10-28 09:17:09,110 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-10-28 09:17:09,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:17:09,610 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2020-10-28 09:17:09,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-28 09:17:09,610 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 58 [2020-10-28 09:17:09,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:17:09,611 INFO L225 Difference]: With dead ends: 83 [2020-10-28 09:17:09,612 INFO L226 Difference]: Without dead ends: 65 [2020-10-28 09:17:09,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1922 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=779, Invalid=6361, Unknown=0, NotChecked=0, Total=7140 [2020-10-28 09:17:09,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-28 09:17:09,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2020-10-28 09:17:09,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-28 09:17:09,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-10-28 09:17:09,625 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 58 [2020-10-28 09:17:09,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:17:09,625 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-10-28 09:17:09,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-28 09:17:09,626 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-10-28 09:17:09,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 09:17:09,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:17:09,627 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:17:09,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 09:17:09,627 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:17:09,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:17:09,628 INFO L82 PathProgramCache]: Analyzing trace with hash 802406170, now seen corresponding path program 11 times [2020-10-28 09:17:09,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:17:09,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679923465] [2020-10-28 09:17:09,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:17:09,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:09,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:09,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:10,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:14,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:14,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 09:17:14,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:17:14,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 09:17:14,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:14,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:14,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:17:14,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:17:14,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 09:17:14,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:14,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:17:14,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:14,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:14,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:14,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:17:14,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:14,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:17:14,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:14,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:14,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:14,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:14,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:14,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:17:14,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:17:14,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:14,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:14,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:14,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:17:14,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:14,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:17:14,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:14,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:14,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:14,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:14,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:14,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:17:14,876 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-28 09:17:14,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679923465] [2020-10-28 09:17:14,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:17:14,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:17:14,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260848713] [2020-10-28 09:17:14,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:17:14,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:17:14,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:17:14,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:17:14,878 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 14 states. [2020-10-28 09:17:15,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:17:15,597 INFO L93 Difference]: Finished difference Result 129 states and 137 transitions. [2020-10-28 09:17:15,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:17:15,597 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 60 [2020-10-28 09:17:15,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:17:15,598 INFO L225 Difference]: With dead ends: 129 [2020-10-28 09:17:15,598 INFO L226 Difference]: Without dead ends: 78 [2020-10-28 09:17:15,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:17:15,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-28 09:17:15,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 65. [2020-10-28 09:17:15,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-28 09:17:15,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2020-10-28 09:17:15,624 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 60 [2020-10-28 09:17:15,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:17:15,624 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2020-10-28 09:17:15,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:17:15,624 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2020-10-28 09:17:15,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 09:17:15,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:17:15,627 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:17:15,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 09:17:15,627 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:17:15,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:17:15,628 INFO L82 PathProgramCache]: Analyzing trace with hash -301489898, now seen corresponding path program 12 times [2020-10-28 09:17:15,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:17:15,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480145500] [2020-10-28 09:17:15,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:17:15,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:15,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:15,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:15,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:20,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:20,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 09:17:20,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:17:20,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:17:20,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:20,654 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:20,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:17:20,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:17:20,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 09:17:20,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:20,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:17:20,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:20,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:20,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:20,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:17:20,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:20,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:17:20,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:20,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:20,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:20,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:20,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:20,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:20,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:17:20,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:20,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:20,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:20,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:17:20,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:20,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:17:20,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:20,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:20,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:20,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:20,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:20,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:20,850 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-28 09:17:20,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [480145500] [2020-10-28 09:17:20,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:17:20,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:17:20,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795391922] [2020-10-28 09:17:20,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:17:20,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:17:20,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:17:20,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:17:20,854 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 14 states. [2020-10-28 09:17:21,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:17:21,544 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2020-10-28 09:17:21,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 09:17:21,544 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 64 [2020-10-28 09:17:21,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:17:21,545 INFO L225 Difference]: With dead ends: 74 [2020-10-28 09:17:21,546 INFO L226 Difference]: Without dead ends: 67 [2020-10-28 09:17:21,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:17:21,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-28 09:17:21,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-28 09:17:21,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 09:17:21,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2020-10-28 09:17:21,559 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 64 [2020-10-28 09:17:21,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:17:21,559 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2020-10-28 09:17:21,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:17:21,559 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2020-10-28 09:17:21,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 09:17:21,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:17:21,560 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:17:21,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 09:17:21,561 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:17:21,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:17:21,561 INFO L82 PathProgramCache]: Analyzing trace with hash -774446540, now seen corresponding path program 13 times [2020-10-28 09:17:21,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:17:21,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760038154] [2020-10-28 09:17:21,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:17:21,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:21,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:22,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:24,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:26,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:26,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:26,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 09:17:26,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:17:26,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5120 [2020-10-28 09:17:26,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:26,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:26,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-28 09:17:26,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:17:26,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 09:17:26,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:27,113 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2020-10-28 09:17:27,364 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 34 [2020-10-28 09:17:27,735 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2020-10-28 09:17:27,866 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2020-10-28 09:17:28,029 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-10-28 09:17:28,258 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2020-10-28 09:17:28,490 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 62 [2020-10-28 09:17:28,645 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2020-10-28 09:17:28,861 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 63 [2020-10-28 09:17:29,085 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 63 [2020-10-28 09:17:29,336 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 68 [2020-10-28 09:17:29,585 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 68 [2020-10-28 09:17:29,846 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 66 [2020-10-28 09:17:30,088 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 59 [2020-10-28 09:17:30,384 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 71 [2020-10-28 09:17:30,729 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 75 [2020-10-28 09:17:31,062 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 76 [2020-10-28 09:17:31,404 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 71 [2020-10-28 09:17:31,704 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 65 [2020-10-28 09:17:32,132 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 80 [2020-10-28 09:17:32,526 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 76 [2020-10-28 09:17:32,946 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 81 [2020-10-28 09:17:33,331 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 72 [2020-10-28 09:17:33,746 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 78 [2020-10-28 09:17:34,120 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 69 [2020-10-28 09:17:34,560 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 74 [2020-10-28 09:17:34,909 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 63 [2020-10-28 09:17:35,316 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 61 [2020-10-28 09:17:35,557 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2020-10-28 09:17:35,850 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2020-10-28 09:17:36,277 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 48 [2020-10-28 09:17:36,731 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2020-10-28 09:17:37,166 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2020-10-28 09:17:38,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:17:38,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:38,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:38,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:38,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:17:38,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:38,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:17:38,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:38,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:38,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:38,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:38,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:38,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:38,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:17:38,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:38,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:38,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:38,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:17:38,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:38,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:17:38,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:38,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:38,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:38,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:38,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:38,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:38,619 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 1 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:17:38,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760038154] [2020-10-28 09:17:38,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:17:38,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-28 09:17:38,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249933586] [2020-10-28 09:17:38,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-28 09:17:38,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:17:38,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-28 09:17:38,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2273, Unknown=0, NotChecked=0, Total=2450 [2020-10-28 09:17:38,622 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 50 states. [2020-10-28 09:17:39,858 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 39 [2020-10-28 09:17:41,052 WARN L193 SmtUtils]: Spent 913.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 112 [2020-10-28 09:17:41,823 WARN L193 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 101 [2020-10-28 09:17:42,447 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 90 [2020-10-28 09:17:43,027 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 81 [2020-10-28 09:17:43,386 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 55 [2020-10-28 09:17:43,693 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 51 [2020-10-28 09:17:45,636 WARN L193 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 254 DAG size of output: 170 [2020-10-28 09:17:46,029 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 56 [2020-10-28 09:17:46,344 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 56 [2020-10-28 09:17:46,897 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 58 [2020-10-28 09:17:47,390 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 58 [2020-10-28 09:17:48,109 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 80 [2020-10-28 09:17:49,139 WARN L193 SmtUtils]: Spent 638.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 82 [2020-10-28 09:17:49,929 WARN L193 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 81 [2020-10-28 09:17:50,532 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 83 [2020-10-28 09:17:51,860 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 229 DAG size of output: 131 [2020-10-28 09:17:52,603 WARN L193 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 87 [2020-10-28 09:17:53,027 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-10-28 09:17:53,417 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-10-28 09:17:54,071 WARN L193 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 111 [2020-10-28 09:17:54,762 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 112 [2020-10-28 09:17:55,450 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 110 [2020-10-28 09:17:56,072 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2020-10-28 09:17:56,662 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2020-10-28 09:17:57,035 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2020-10-28 09:17:57,295 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-10-28 09:17:57,526 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2020-10-28 09:17:58,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:17:58,481 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2020-10-28 09:17:58,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-28 09:17:58,482 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 66 [2020-10-28 09:17:58,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:17:58,484 INFO L225 Difference]: With dead ends: 89 [2020-10-28 09:17:58,484 INFO L226 Difference]: Without dead ends: 82 [2020-10-28 09:17:58,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1525 ImplicationChecksByTransitivity, 27.9s TimeCoverageRelationStatistics Valid=614, Invalid=6696, Unknown=0, NotChecked=0, Total=7310 [2020-10-28 09:17:58,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-28 09:17:58,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2020-10-28 09:17:58,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-28 09:17:58,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2020-10-28 09:17:58,506 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 66 [2020-10-28 09:17:58,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:17:58,508 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2020-10-28 09:17:58,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-28 09:17:58,508 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2020-10-28 09:17:58,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 09:17:58,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:17:58,509 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:17:58,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 09:17:58,509 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:17:58,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:17:58,510 INFO L82 PathProgramCache]: Analyzing trace with hash -19246126, now seen corresponding path program 14 times [2020-10-28 09:17:58,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:17:58,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526974940] [2020-10-28 09:17:58,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:17:58,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:58,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:58,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:58,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:03,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:03,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 09:18:03,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:18:03,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 09:18:03,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:03,545 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:03,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:18:03,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:18:03,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 09:18:03,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:03,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:18:03,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:03,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:03,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:03,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:18:03,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:03,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:18:03,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:03,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:03,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:03,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:03,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:03,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:03,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:18:03,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:03,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:03,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:03,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:18:03,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:03,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:18:03,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:03,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:03,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:03,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:03,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:03,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:03,800 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-28 09:18:03,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526974940] [2020-10-28 09:18:03,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:18:03,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:18:03,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041030052] [2020-10-28 09:18:03,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:18:03,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:18:03,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:18:03,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:18:03,802 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 16 states. [2020-10-28 09:18:04,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:18:04,732 INFO L93 Difference]: Finished difference Result 160 states and 171 transitions. [2020-10-28 09:18:04,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 09:18:04,733 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 68 [2020-10-28 09:18:04,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:18:04,734 INFO L225 Difference]: With dead ends: 160 [2020-10-28 09:18:04,734 INFO L226 Difference]: Without dead ends: 86 [2020-10-28 09:18:04,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:18:04,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-28 09:18:04,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 73. [2020-10-28 09:18:04,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-28 09:18:04,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2020-10-28 09:18:04,755 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 68 [2020-10-28 09:18:04,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:18:04,755 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2020-10-28 09:18:04,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:18:04,755 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2020-10-28 09:18:04,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 09:18:04,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:18:04,757 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:18:04,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 09:18:04,757 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:18:04,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:18:04,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1457976818, now seen corresponding path program 15 times [2020-10-28 09:18:04,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:18:04,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100351800] [2020-10-28 09:18:04,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:18:04,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:04,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:04,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:05,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:09,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:09,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 09:18:09,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:18:09,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 09:18:09,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:09,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:09,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:18:09,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:18:09,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 09:18:09,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:10,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:18:10,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:10,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:10,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:10,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:18:10,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:10,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:18:10,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:10,046 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:10,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:10,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:10,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:10,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:10,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:18:10,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:10,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:10,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:10,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:18:10,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:10,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:18:10,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:10,052 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:10,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:10,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:10,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:10,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:10,060 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-28 09:18:10,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100351800] [2020-10-28 09:18:10,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:18:10,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:18:10,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884426825] [2020-10-28 09:18:10,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:18:10,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:18:10,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:18:10,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:18:10,062 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand 16 states. [2020-10-28 09:18:11,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:18:11,075 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2020-10-28 09:18:11,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 09:18:11,076 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 72 [2020-10-28 09:18:11,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:18:11,077 INFO L225 Difference]: With dead ends: 82 [2020-10-28 09:18:11,077 INFO L226 Difference]: Without dead ends: 75 [2020-10-28 09:18:11,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:18:11,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-28 09:18:11,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-28 09:18:11,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-28 09:18:11,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2020-10-28 09:18:11,090 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 72 [2020-10-28 09:18:11,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:18:11,090 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2020-10-28 09:18:11,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:18:11,091 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2020-10-28 09:18:11,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 09:18:11,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:18:11,091 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:18:11,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 09:18:11,091 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:18:11,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:18:11,092 INFO L82 PathProgramCache]: Analyzing trace with hash 238153004, now seen corresponding path program 16 times [2020-10-28 09:18:11,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:18:11,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182949895] [2020-10-28 09:18:11,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:18:11,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:11,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:12,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:15,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:16,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:16,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 09:18:16,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:18:16,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5429 [2020-10-28 09:18:16,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:16,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:16,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-28 09:18:16,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:18:16,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 09:18:16,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:17,228 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2020-10-28 09:18:17,457 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-10-28 09:18:17,690 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2020-10-28 09:18:17,860 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2020-10-28 09:18:18,112 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 54 [2020-10-28 09:18:18,334 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 54 [2020-10-28 09:18:18,545 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2020-10-28 09:18:18,813 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 68 [2020-10-28 09:18:19,120 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 65 [2020-10-28 09:18:19,333 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2020-10-28 09:18:19,650 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 66 [2020-10-28 09:18:19,932 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 68 [2020-10-28 09:18:20,295 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 68 [2020-10-28 09:18:20,646 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 68 [2020-10-28 09:18:21,071 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 72 [2020-10-28 09:18:21,482 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 72 [2020-10-28 09:18:21,917 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 74 [2020-10-28 09:18:22,333 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 74 [2020-10-28 09:18:22,766 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 76 [2020-10-28 09:18:23,185 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 76 [2020-10-28 09:18:23,604 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 78 [2020-10-28 09:18:23,976 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 70 [2020-10-28 09:18:24,512 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 84 [2020-10-28 09:18:24,990 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 80 [2020-10-28 09:18:25,550 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 85 [2020-10-28 09:18:26,054 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 78 [2020-10-28 09:18:26,668 WARN L193 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 86 [2020-10-28 09:18:27,203 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 78 [2020-10-28 09:18:27,740 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 83 [2020-10-28 09:18:28,180 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 76 [2020-10-28 09:18:28,662 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 79 [2020-10-28 09:18:29,066 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2020-10-28 09:18:29,504 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 70 [2020-10-28 09:18:29,787 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2020-10-28 09:18:30,196 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 65 [2020-10-28 09:18:30,521 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 57 [2020-10-28 09:18:30,931 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 61 [2020-10-28 09:18:31,255 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2020-10-28 09:18:31,654 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 55 [2020-10-28 09:18:31,983 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 48 [2020-10-28 09:18:32,291 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2020-10-28 09:18:32,567 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-10-28 09:18:32,899 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 46 [2020-10-28 09:18:33,400 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 36 [2020-10-28 09:18:34,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:18:34,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:34,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:34,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:34,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:18:34,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:34,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:18:34,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:34,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:34,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:34,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:34,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:34,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:34,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:18:34,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:34,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:34,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:34,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:18:34,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:34,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:18:34,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:34,297 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:34,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:34,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:34,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:34,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:34,390 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 20 proven. 124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:18:34,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182949895] [2020-10-28 09:18:34,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:18:34,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-28 09:18:34,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746916407] [2020-10-28 09:18:34,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-28 09:18:34,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:18:34,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-28 09:18:34,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=2937, Unknown=0, NotChecked=0, Total=3192 [2020-10-28 09:18:34,393 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand 57 states. [2020-10-28 09:18:35,156 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2020-10-28 09:18:35,754 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 52 [2020-10-28 09:18:36,612 WARN L193 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 107 [2020-10-28 09:18:37,776 WARN L193 SmtUtils]: Spent 841.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 110 [2020-10-28 09:18:38,847 WARN L193 SmtUtils]: Spent 752.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 117 [2020-10-28 09:18:39,808 WARN L193 SmtUtils]: Spent 663.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 107 [2020-10-28 09:18:40,823 WARN L193 SmtUtils]: Spent 740.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 116 [2020-10-28 09:18:41,788 WARN L193 SmtUtils]: Spent 663.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 105 [2020-10-28 09:18:42,886 WARN L193 SmtUtils]: Spent 811.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 113 [2020-10-28 09:18:43,879 WARN L193 SmtUtils]: Spent 670.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 102 [2020-10-28 09:18:45,182 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 154 DAG size of output: 116 [2020-10-28 09:18:50,381 WARN L193 SmtUtils]: Spent 4.90 s on a formula simplification. DAG size of input: 244 DAG size of output: 176 [2020-10-28 09:18:51,807 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 180 DAG size of output: 94 [2020-10-28 09:18:52,351 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 67 [2020-10-28 09:18:53,890 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 172 DAG size of output: 101 [2020-10-28 09:18:54,376 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 63 [2020-10-28 09:18:58,690 WARN L193 SmtUtils]: Spent 3.98 s on a formula simplification. DAG size of input: 261 DAG size of output: 169 [2020-10-28 09:18:59,720 WARN L193 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 71 [2020-10-28 09:19:00,809 WARN L193 SmtUtils]: Spent 715.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 89 [2020-10-28 09:19:01,692 WARN L193 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 68 [2020-10-28 09:19:02,512 WARN L193 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 85 [2020-10-28 09:19:03,649 WARN L193 SmtUtils]: Spent 701.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 75 [2020-10-28 09:19:05,102 WARN L193 SmtUtils]: Spent 953.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 87 [2020-10-28 09:19:06,073 WARN L193 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 71