/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=DEEPEST --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/loop-new/count_by_k.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:21:16,254 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:21:16,257 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:21:16,293 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:21:16,294 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:21:16,295 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:21:16,297 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:21:16,299 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:21:16,302 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:21:16,303 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:21:16,304 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:21:16,306 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:21:16,306 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:21:16,308 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:21:16,309 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:21:16,311 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:21:16,312 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:21:16,313 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:21:16,315 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:21:16,343 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:21:16,350 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:21:16,360 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:21:16,365 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:21:16,366 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:21:16,373 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:21:16,373 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:21:16,374 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:21:16,380 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:21:16,381 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:21:16,382 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:21:16,385 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:21:16,386 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:21:16,388 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:21:16,390 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:21:16,391 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:21:16,391 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:21:16,392 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:21:16,392 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:21:16,393 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:21:16,394 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:21:16,394 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:21:16,398 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 [2020-10-27 20:21:16,456 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:21:16,457 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:21:16,460 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:21:16,460 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:21:16,461 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:21:16,461 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:21:16,461 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:21:16,461 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:21:16,462 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:21:16,462 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:21:16,464 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:21:16,464 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:21:16,464 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:21:16,465 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:21:16,465 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:21:16,465 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:21:16,465 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:21:16,466 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:21:16,466 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:21:16,466 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:21:16,466 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:21:16,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:21:16,467 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:21:16,467 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:21:16,468 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:21:16,468 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:21:16,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:21:16,468 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:21:16,468 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:21:16,469 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:21:16,854 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:21:16,906 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:21:16,910 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:21:16,911 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:21:16,912 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:21:16,913 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_k.i [2020-10-27 20:21:16,988 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3dd8da4b5/8b11c42c0bb4466f866e9cae822bd469/FLAG7cd3029e4 [2020-10-27 20:21:17,587 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:21:17,587 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-new/count_by_k.i [2020-10-27 20:21:17,596 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3dd8da4b5/8b11c42c0bb4466f866e9cae822bd469/FLAG7cd3029e4 [2020-10-27 20:21:17,909 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3dd8da4b5/8b11c42c0bb4466f866e9cae822bd469 [2020-10-27 20:21:17,912 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:21:17,920 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:21:17,922 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:21:17,922 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:21:17,926 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:21:17,927 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:21:17" (1/1) ... [2020-10-27 20:21:17,931 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14a1cb91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:21:17, skipping insertion in model container [2020-10-27 20:21:17,931 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:21:17" (1/1) ... [2020-10-27 20:21:17,940 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:21:17,957 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:21:18,129 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:21:18,140 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:21:18,158 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:21:18,175 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:21:18,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:21:18 WrapperNode [2020-10-27 20:21:18,176 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:21:18,177 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:21:18,177 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:21:18,178 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:21:18,191 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:21:18" (1/1) ... [2020-10-27 20:21:18,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:21:18" (1/1) ... [2020-10-27 20:21:18,199 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:21:18" (1/1) ... [2020-10-27 20:21:18,199 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:21:18" (1/1) ... [2020-10-27 20:21:18,218 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:21:18" (1/1) ... [2020-10-27 20:21:18,233 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:21:18" (1/1) ... [2020-10-27 20:21:18,235 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:21:18" (1/1) ... [2020-10-27 20:21:18,237 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:21:18,238 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:21:18,239 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:21:18,239 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:21:18,240 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:21:18" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:21:18,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:21:18,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:21:18,345 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:21:18,345 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 20:21:18,346 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 20:21:18,346 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:21:18,346 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:21:18,346 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:21:18,346 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 20:21:18,346 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 20:21:18,348 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:21:18,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:21:18,348 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 20:21:18,348 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 20:21:18,348 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 20:21:18,349 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:21:18,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:21:18,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:21:18,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:21:18,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:21:18,350 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:21:18,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:21:18,639 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:21:18,639 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 20:21:18,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:21:18 BoogieIcfgContainer [2020-10-27 20:21:18,641 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:21:18,643 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:21:18,644 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:21:18,648 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:21:18,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:21:17" (1/3) ... [2020-10-27 20:21:18,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15abc360 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:21:18, skipping insertion in model container [2020-10-27 20:21:18,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:21:18" (2/3) ... [2020-10-27 20:21:18,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15abc360 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:21:18, skipping insertion in model container [2020-10-27 20:21:18,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:21:18" (3/3) ... [2020-10-27 20:21:18,652 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_k.i [2020-10-27 20:21:18,666 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:21:18,672 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:21:18,696 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:21:18,760 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:21:18,760 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:21:18,760 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:21:18,760 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:21:18,761 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:21:18,761 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:21:18,764 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:21:18,764 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:21:18,808 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-27 20:21:18,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-27 20:21:18,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:21:18,826 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:21:18,826 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:21:18,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:21:18,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1673345896, now seen corresponding path program 1 times [2020-10-27 20:21:18,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:21:18,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132470878] [2020-10-27 20:21:18,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:21:19,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:19,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:19,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:19,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 20:21:19,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:21:19,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-10-27 20:21:19,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:19,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:21:19,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:21:19,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:21:19,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 20:21:19,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:21:19,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:19,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:19,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:19,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:21:19,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:21:19,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 20:21:19,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:19,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:21:19,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:21:19,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:21:19,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:19,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:21:19,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132470878] [2020-10-27 20:21:19,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:21:19,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 20:21:19,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690456976] [2020-10-27 20:21:19,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 20:21:19,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:21:19,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 20:21:19,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:21:19,509 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2020-10-27 20:21:19,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:21:19,577 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2020-10-27 20:21:19,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 20:21:19,579 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-10-27 20:21:19,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:21:19,587 INFO L225 Difference]: With dead ends: 40 [2020-10-27 20:21:19,587 INFO L226 Difference]: Without dead ends: 16 [2020-10-27 20:21:19,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:21:19,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-27 20:21:19,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-27 20:21:19,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-27 20:21:19,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-27 20:21:19,637 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-10-27 20:21:19,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:21:19,638 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-27 20:21:19,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 20:21:19,638 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-27 20:21:19,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-27 20:21:19,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:21:19,639 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:21:19,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:21:19,640 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:21:19,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:21:19,641 INFO L82 PathProgramCache]: Analyzing trace with hash 643291106, now seen corresponding path program 1 times [2020-10-27 20:21:19,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:21:19,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277609793] [2020-10-27 20:21:19,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:21:19,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:19,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:19,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:19,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 20:21:19,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:21:19,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-27 20:21:19,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:19,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:21:19,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:21:19,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:21:19,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:21:20,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:21:20,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:20,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:20,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:20,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:21:20,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:21:20,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:21:20,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:20,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:21:20,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:21:20,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:21:20,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:20,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:21:20,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277609793] [2020-10-27 20:21:20,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:21:20,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 20:21:20,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018188694] [2020-10-27 20:21:20,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:21:20,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:21:20,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:21:20,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:21:20,134 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 7 states. [2020-10-27 20:21:20,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:21:20,322 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-27 20:21:20,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:21:20,323 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-10-27 20:21:20,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:21:20,324 INFO L225 Difference]: With dead ends: 24 [2020-10-27 20:21:20,324 INFO L226 Difference]: Without dead ends: 17 [2020-10-27 20:21:20,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:21:20,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-27 20:21:20,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-27 20:21:20,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-27 20:21:20,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-27 20:21:20,333 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-10-27 20:21:20,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:21:20,333 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-27 20:21:20,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:21:20,334 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-27 20:21:20,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 20:21:20,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:21:20,335 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:21:20,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:21:20,335 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:21:20,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:21:20,336 INFO L82 PathProgramCache]: Analyzing trace with hash -2122930880, now seen corresponding path program 1 times [2020-10-27 20:21:20,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:21:20,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265888018] [2020-10-27 20:21:20,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:21:20,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:20,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:20,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:20,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:20,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 20:21:20,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:21:20,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 287 [2020-10-27 20:21:20,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:20,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:21:20,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:21:20,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:21:20,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:21:20,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:21:20,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:20,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:20,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:20,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:21:20,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:21:20,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 20:21:20,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:20,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:21:20,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:21:20,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:21:20,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:21:20,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:21:20,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265888018] [2020-10-27 20:21:20,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:21:20,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:21:20,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697376985] [2020-10-27 20:21:20,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:21:20,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:21:20,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:21:20,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:21:20,802 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 8 states. [2020-10-27 20:21:21,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:21:21,038 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-27 20:21:21,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:21:21,038 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-27 20:21:21,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:21:21,039 INFO L225 Difference]: With dead ends: 26 [2020-10-27 20:21:21,039 INFO L226 Difference]: Without dead ends: 19 [2020-10-27 20:21:21,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:21:21,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-27 20:21:21,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-27 20:21:21,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 20:21:21,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-27 20:21:21,047 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2020-10-27 20:21:21,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:21:21,047 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-27 20:21:21,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:21:21,048 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-27 20:21:21,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 20:21:21,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:21:21,049 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:21:21,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:21:21,049 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:21:21,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:21:21,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1877503202, now seen corresponding path program 2 times [2020-10-27 20:21:21,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:21:21,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [453872109] [2020-10-27 20:21:21,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:21:21,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:21,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:21,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:21,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:21,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:21,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 20:21:21,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:21:21,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-10-27 20:21:21,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:21,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:21:21,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:21:21,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 20:21:21,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:21,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:21:21,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:21,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:21,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:21,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:21:21,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:21:21,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 20:21:21,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:21,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:21:21,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:21:21,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:21:21,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:21,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:21:21,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [453872109] [2020-10-27 20:21:21,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:21:21,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:21:21,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562874357] [2020-10-27 20:21:21,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:21:21,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:21:21,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:21:21,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:21:21,522 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 9 states. [2020-10-27 20:21:21,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:21:21,818 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-10-27 20:21:21,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:21:21,819 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-10-27 20:21:21,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:21:21,820 INFO L225 Difference]: With dead ends: 28 [2020-10-27 20:21:21,820 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 20:21:21,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:21:21,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 20:21:21,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-27 20:21:21,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-27 20:21:21,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-27 20:21:21,827 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2020-10-27 20:21:21,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:21:21,827 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-27 20:21:21,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:21:21,828 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-27 20:21:21,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 20:21:21,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:21:21,829 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:21:21,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:21:21,829 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:21:21,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:21:21,830 INFO L82 PathProgramCache]: Analyzing trace with hash 2050261372, now seen corresponding path program 3 times [2020-10-27 20:21:21,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:21:21,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506862270] [2020-10-27 20:21:21,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:21:21,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:21,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:21,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:21,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:21,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:22,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:22,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 20:21:22,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:21:22,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 293 [2020-10-27 20:21:22,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:22,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:21:22,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:21:22,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:21:22,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:22,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:21:22,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:22,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:22,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:22,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:21:22,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:21:22,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:21:22,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:22,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:21:22,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:21:22,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:21:22,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:22,220 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:21:22,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506862270] [2020-10-27 20:21:22,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:21:22,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:21:22,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715913772] [2020-10-27 20:21:22,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:21:22,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:21:22,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:21:22,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:21:22,223 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 8 states. [2020-10-27 20:21:22,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:21:22,547 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2020-10-27 20:21:22,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:21:22,548 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-27 20:21:22,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:21:22,549 INFO L225 Difference]: With dead ends: 32 [2020-10-27 20:21:22,549 INFO L226 Difference]: Without dead ends: 25 [2020-10-27 20:21:22,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:21:22,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-27 20:21:22,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-27 20:21:22,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 20:21:22,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-10-27 20:21:22,557 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 20 [2020-10-27 20:21:22,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:21:22,557 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-10-27 20:21:22,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:21:22,557 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-10-27 20:21:22,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 20:21:22,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:21:22,558 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:21:22,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:21:22,559 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:21:22,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:21:22,559 INFO L82 PathProgramCache]: Analyzing trace with hash -336470088, now seen corresponding path program 4 times [2020-10-27 20:21:22,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:21:22,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009375194] [2020-10-27 20:21:22,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:21:22,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:22,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:22,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:22,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:22,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:22,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:22,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:23,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:23,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:21:23,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 20:21:23,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 545 [2020-10-27 20:21:23,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:23,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:21:23,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:21:23,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 20:21:23,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:23,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:21:23,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:23,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:23,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:23,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:21:23,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:21:23,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:21:23,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:23,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:21:23,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:21:23,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:21:23,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 20:21:23,277 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:21:23,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009375194] [2020-10-27 20:21:23,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:21:23,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 20:21:23,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322928976] [2020-10-27 20:21:23,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:21:23,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:21:23,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:21:23,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:21:23,284 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 12 states. [2020-10-27 20:21:23,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:21:23,826 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-27 20:21:23,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 20:21:23,827 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2020-10-27 20:21:23,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:21:23,828 INFO L225 Difference]: With dead ends: 34 [2020-10-27 20:21:23,828 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 20:21:23,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:21:23,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 20:21:23,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-27 20:21:23,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 20:21:23,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-27 20:21:23,842 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2020-10-27 20:21:23,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:21:23,842 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-27 20:21:23,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:21:23,842 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-27 20:21:23,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 20:21:23,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:21:23,844 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:21:23,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:21:23,845 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:21:23,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:21:23,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1219366806, now seen corresponding path program 5 times [2020-10-27 20:21:23,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:21:23,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213728599] [2020-10-27 20:21:23,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:21:23,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:23,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:23,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:23,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:23,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:23,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:24,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:24,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:24,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:24,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 20:21:24,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 20:21:24,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1049 [2020-10-27 20:21:24,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:24,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:21:24,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:21:24,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:21:24,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:25,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:21:25,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:25,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:25,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:25,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:21:25,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:21:25,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:21:25,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:25,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:21:25,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:21:25,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:21:25,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:25,046 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:21:25,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213728599] [2020-10-27 20:21:25,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:21:25,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:21:25,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008606069] [2020-10-27 20:21:25,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:21:25,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:21:25,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:21:25,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:21:25,049 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 11 states. [2020-10-27 20:21:25,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:21:25,758 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2020-10-27 20:21:25,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 20:21:25,758 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-27 20:21:25,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:21:25,760 INFO L225 Difference]: With dead ends: 38 [2020-10-27 20:21:25,760 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 20:21:25,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2020-10-27 20:21:25,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 20:21:25,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-27 20:21:25,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 20:21:25,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-10-27 20:21:25,773 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 26 [2020-10-27 20:21:25,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:21:25,774 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-10-27 20:21:25,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:21:25,774 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-10-27 20:21:25,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 20:21:25,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:21:25,775 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:21:25,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:21:25,775 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:21:25,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:21:25,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1469919022, now seen corresponding path program 6 times [2020-10-27 20:21:25,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:21:25,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954531808] [2020-10-27 20:21:25,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:21:25,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:25,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:25,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:25,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:25,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:25,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:25,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:25,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:26,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:26,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:26,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:26,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 20:21:26,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 20:21:26,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1052 [2020-10-27 20:21:26,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:26,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:21:26,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:21:26,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 20:21:26,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:27,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:21:27,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:27,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:27,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:27,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:21:27,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:21:27,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:21:27,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:27,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:21:27,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:21:27,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:21:27,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:27,017 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:21:27,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954531808] [2020-10-27 20:21:27,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:21:27,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 20:21:27,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226219848] [2020-10-27 20:21:27,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:21:27,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:21:27,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:21:27,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:21:27,028 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 13 states. [2020-10-27 20:21:27,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:21:27,968 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2020-10-27 20:21:27,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 20:21:27,969 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-27 20:21:27,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:21:27,969 INFO L225 Difference]: With dead ends: 42 [2020-10-27 20:21:27,969 INFO L226 Difference]: Without dead ends: 35 [2020-10-27 20:21:27,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2020-10-27 20:21:27,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-27 20:21:27,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-27 20:21:27,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 20:21:27,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-10-27 20:21:27,978 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 30 [2020-10-27 20:21:27,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:21:27,979 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-10-27 20:21:27,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:21:27,979 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-10-27 20:21:27,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 20:21:27,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:21:27,980 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:21:27,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:21:27,980 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:21:27,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:21:27,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1323527154, now seen corresponding path program 7 times [2020-10-27 20:21:27,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:21:27,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784300447] [2020-10-27 20:21:27,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:21:27,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:28,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:28,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:28,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:28,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:28,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:28,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:28,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:28,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:28,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:28,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:28,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:29,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:29,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 20:21:29,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 20:21:29,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1683 [2020-10-27 20:21:29,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:29,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:21:29,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:21:29,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 20:21:29,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:29,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:21:29,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:29,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:29,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:29,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:21:29,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:21:29,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:21:29,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:29,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:21:29,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:21:29,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:21:29,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:29,886 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:21:29,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784300447] [2020-10-27 20:21:29,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:21:29,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 20:21:29,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823204257] [2020-10-27 20:21:29,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 20:21:29,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:21:29,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 20:21:29,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:21:29,889 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 15 states. [2020-10-27 20:21:31,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:21:31,022 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-10-27 20:21:31,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 20:21:31,022 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-27 20:21:31,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:21:31,024 INFO L225 Difference]: With dead ends: 46 [2020-10-27 20:21:31,024 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 20:21:31,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=216, Invalid=540, Unknown=0, NotChecked=0, Total=756 [2020-10-27 20:21:31,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 20:21:31,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-27 20:21:31,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 20:21:31,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-10-27 20:21:31,037 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 34 [2020-10-27 20:21:31,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:21:31,037 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-10-27 20:21:31,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 20:21:31,038 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-10-27 20:21:31,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 20:21:31,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:21:31,039 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:21:31,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:21:31,039 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:21:31,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:21:31,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1955223882, now seen corresponding path program 8 times [2020-10-27 20:21:31,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:21:31,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699159052] [2020-10-27 20:21:31,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:21:31,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:31,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:31,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:31,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:31,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:31,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:31,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:31,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:31,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:31,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:31,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:31,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:31,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:31,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:33,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:33,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 20:21:33,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 20:21:33,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1963 [2020-10-27 20:21:33,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:33,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:21:33,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:21:33,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 20:21:33,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:33,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:21:33,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:33,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:33,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:33,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:21:33,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:21:33,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:21:33,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:33,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:21:33,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:21:33,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:21:33,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:33,269 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:21:33,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699159052] [2020-10-27 20:21:33,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:21:33,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 20:21:33,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417290385] [2020-10-27 20:21:33,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 20:21:33,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:21:33,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 20:21:33,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:21:33,271 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 17 states. [2020-10-27 20:21:34,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:21:34,643 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2020-10-27 20:21:34,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 20:21:34,647 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-10-27 20:21:34,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:21:34,648 INFO L225 Difference]: With dead ends: 50 [2020-10-27 20:21:34,648 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 20:21:34,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=277, Invalid=715, Unknown=0, NotChecked=0, Total=992 [2020-10-27 20:21:34,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 20:21:34,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-27 20:21:34,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 20:21:34,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-10-27 20:21:34,665 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 38 [2020-10-27 20:21:34,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:21:34,666 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-10-27 20:21:34,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 20:21:34,666 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-10-27 20:21:34,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 20:21:34,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:21:34,667 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:21:34,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:21:34,667 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:21:34,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:21:34,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1797578618, now seen corresponding path program 9 times [2020-10-27 20:21:34,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:21:34,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737258479] [2020-10-27 20:21:34,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:21:34,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:34,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:34,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:34,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:34,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:34,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:34,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:34,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:34,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:34,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:34,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:35,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:35,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:35,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:35,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:35,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:38,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:38,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 20:21:38,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 20:21:38,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3326 [2020-10-27 20:21:38,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:38,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 20:21:38,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:21:38,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 20:21:38,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:38,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:21:38,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:38,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:38,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:38,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:21:38,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:21:38,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:21:38,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:38,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:21:38,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:21:38,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:21:38,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:38,336 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:21:38,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737258479] [2020-10-27 20:21:38,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:21:38,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 20:21:38,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248064460] [2020-10-27 20:21:38,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 20:21:38,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:21:38,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 20:21:38,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:21:38,339 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 19 states. [2020-10-27 20:21:39,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:21:39,988 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2020-10-27 20:21:39,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 20:21:39,989 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2020-10-27 20:21:39,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:21:39,990 INFO L225 Difference]: With dead ends: 54 [2020-10-27 20:21:39,990 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 20:21:39,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=344, Invalid=916, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 20:21:39,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 20:21:39,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-27 20:21:39,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 20:21:39,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-10-27 20:21:40,000 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 42 [2020-10-27 20:21:40,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:21:40,000 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-10-27 20:21:40,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 20:21:40,000 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-10-27 20:21:40,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 20:21:40,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:21:40,002 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:21:40,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 20:21:40,002 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:21:40,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:21:40,002 INFO L82 PathProgramCache]: Analyzing trace with hash 79555010, now seen corresponding path program 10 times [2020-10-27 20:21:40,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:21:40,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576325093] [2020-10-27 20:21:40,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:21:40,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:40,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:40,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:40,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:40,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:40,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:40,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:40,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:40,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:40,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:40,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:40,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:40,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:40,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:40,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:40,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:40,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:40,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:42,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:42,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 20:21:42,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 20:21:42,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2939 [2020-10-27 20:21:42,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:42,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 20:21:42,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:21:42,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 20:21:42,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:43,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:21:43,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:43,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:43,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:43,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:21:43,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:21:43,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:21:43,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:43,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:21:43,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:21:43,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:21:43,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:43,293 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:21:43,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576325093] [2020-10-27 20:21:43,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:21:43,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 20:21:43,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950421401] [2020-10-27 20:21:43,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 20:21:43,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:21:43,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 20:21:43,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:21:43,297 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 21 states. [2020-10-27 20:21:45,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:21:45,247 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-10-27 20:21:45,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 20:21:45,247 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 46 [2020-10-27 20:21:45,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:21:45,249 INFO L225 Difference]: With dead ends: 58 [2020-10-27 20:21:45,249 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 20:21:45,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=425, Invalid=1135, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 20:21:45,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 20:21:45,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-27 20:21:45,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 20:21:45,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-10-27 20:21:45,260 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 46 [2020-10-27 20:21:45,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:21:45,260 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-10-27 20:21:45,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 20:21:45,260 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-10-27 20:21:45,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 20:21:45,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:21:45,261 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:21:45,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 20:21:45,262 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:21:45,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:21:45,262 INFO L82 PathProgramCache]: Analyzing trace with hash -949897986, now seen corresponding path program 11 times [2020-10-27 20:21:45,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:21:45,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910270795] [2020-10-27 20:21:45,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:21:45,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:45,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:45,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:45,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:45,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:45,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:45,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:45,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:45,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:45,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:45,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:45,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:45,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:45,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:45,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:45,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:45,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:45,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:45,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:46,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:48,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:48,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 20:21:48,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-27 20:21:48,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2859 [2020-10-27 20:21:48,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:48,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 20:21:48,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:21:48,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 20:21:48,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:48,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:21:48,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:48,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:48,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:48,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:21:48,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:21:48,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:21:48,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:48,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:21:48,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:21:48,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:21:48,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:48,736 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:21:48,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910270795] [2020-10-27 20:21:48,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:21:48,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 20:21:48,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289113163] [2020-10-27 20:21:48,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 20:21:48,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:21:48,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 20:21:48,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:21:48,740 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 23 states. [2020-10-27 20:21:51,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:21:51,027 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2020-10-27 20:21:51,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 20:21:51,027 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 50 [2020-10-27 20:21:51,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:21:51,028 INFO L225 Difference]: With dead ends: 61 [2020-10-27 20:21:51,029 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 20:21:51,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=360, Invalid=1446, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 20:21:51,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 20:21:51,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-27 20:21:51,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 20:21:51,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-10-27 20:21:51,044 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2020-10-27 20:21:51,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:21:51,044 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-10-27 20:21:51,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 20:21:51,044 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-10-27 20:21:51,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 20:21:51,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:21:51,045 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:21:51,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 20:21:51,046 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:21:51,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:21:51,046 INFO L82 PathProgramCache]: Analyzing trace with hash 125676380, now seen corresponding path program 12 times [2020-10-27 20:21:51,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:21:51,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752388646] [2020-10-27 20:21:51,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:21:51,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:51,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:51,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:51,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:51,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:51,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:51,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:51,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:51,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:51,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:51,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:51,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:51,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:51,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:51,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:51,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:51,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:51,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:52,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:52,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:53,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:56,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:56,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 20:21:56,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-27 20:21:56,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 20:21:56,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:56,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 20:21:56,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:21:56,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 20:21:56,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:56,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:21:56,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:56,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:56,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:56,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:21:56,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:21:56,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:21:56,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:56,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:21:56,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:21:56,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:21:56,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:56,648 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:21:56,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752388646] [2020-10-27 20:21:56,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:21:56,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 20:21:56,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388679187] [2020-10-27 20:21:56,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 20:21:56,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:21:56,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 20:21:56,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-10-27 20:21:56,656 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 24 states. [2020-10-27 20:21:57,261 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 35 [2020-10-27 20:21:57,404 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 35 [2020-10-27 20:21:59,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:21:59,323 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-10-27 20:21:59,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 20:21:59,324 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 52 [2020-10-27 20:21:59,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:21:59,325 INFO L225 Difference]: With dead ends: 64 [2020-10-27 20:21:59,325 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 20:21:59,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=564, Invalid=1506, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 20:21:59,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 20:21:59,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-27 20:21:59,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 20:21:59,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-10-27 20:21:59,338 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 52 [2020-10-27 20:21:59,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:21:59,338 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-10-27 20:21:59,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 20:21:59,339 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-10-27 20:21:59,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 20:21:59,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:21:59,340 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:21:59,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 20:21:59,341 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:21:59,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:21:59,342 INFO L82 PathProgramCache]: Analyzing trace with hash -86828648, now seen corresponding path program 13 times [2020-10-27 20:21:59,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:21:59,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812229978] [2020-10-27 20:21:59,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:21:59,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:59,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:59,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:59,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:59,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:59,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:59,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:59,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:59,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:59,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:59,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:59,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:59,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:59,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:59,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:59,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:59,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:59,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:59,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:59,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:59,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:59,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:59,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:01,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:01,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 20:22:01,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-27 20:22:01,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2516 [2020-10-27 20:22:01,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:01,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 20:22:01,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:22:01,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 20:22:01,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:02,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:02,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:02,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:02,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:02,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:02,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:02,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:22:02,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:02,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:02,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:02,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:02,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:02,436 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:22:02,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812229978] [2020-10-27 20:22:02,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:02,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 20:22:02,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022007262] [2020-10-27 20:22:02,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 20:22:02,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:02,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 20:22:02,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-10-27 20:22:02,439 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 26 states. [2020-10-27 20:22:02,612 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 32 [2020-10-27 20:22:02,979 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 35 [2020-10-27 20:22:03,120 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 35 [2020-10-27 20:22:03,254 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 35 [2020-10-27 20:22:05,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:05,463 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2020-10-27 20:22:05,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 20:22:05,465 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 56 [2020-10-27 20:22:05,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:05,466 INFO L225 Difference]: With dead ends: 68 [2020-10-27 20:22:05,466 INFO L226 Difference]: Without dead ends: 61 [2020-10-27 20:22:05,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=672, Invalid=1778, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 20:22:05,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-27 20:22:05,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-27 20:22:05,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 20:22:05,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-10-27 20:22:05,483 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 56 [2020-10-27 20:22:05,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:05,483 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-10-27 20:22:05,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 20:22:05,483 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-10-27 20:22:05,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 20:22:05,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:05,484 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:05,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 20:22:05,485 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:05,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:05,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1292831188, now seen corresponding path program 14 times [2020-10-27 20:22:05,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:05,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620066767] [2020-10-27 20:22:05,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:05,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:05,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:05,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:05,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:05,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:05,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:05,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:05,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:05,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:05,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:05,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:05,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:05,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:05,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:05,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:05,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:05,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:06,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:06,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:06,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:06,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:06,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:06,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:06,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:07,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:09,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:09,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 20:22:09,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-27 20:22:09,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4263 [2020-10-27 20:22:09,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:09,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 20:22:09,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:22:09,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 20:22:09,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:10,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:10,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:10,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:10,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:10,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:10,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:10,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:22:10,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:10,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:10,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:10,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:10,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:10,525 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:22:10,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620066767] [2020-10-27 20:22:10,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:10,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 20:22:10,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797353095] [2020-10-27 20:22:10,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 20:22:10,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:10,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 20:22:10,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2020-10-27 20:22:10,527 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 30 states. [2020-10-27 20:22:10,719 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 35 [2020-10-27 20:22:10,854 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 35 [2020-10-27 20:22:10,979 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 35 [2020-10-27 20:22:11,241 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 35 [2020-10-27 20:22:11,381 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 35 [2020-10-27 20:22:13,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:13,875 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-10-27 20:22:13,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 20:22:13,877 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 60 [2020-10-27 20:22:13,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:13,878 INFO L225 Difference]: With dead ends: 70 [2020-10-27 20:22:13,878 INFO L226 Difference]: Without dead ends: 63 [2020-10-27 20:22:13,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=722, Invalid=2470, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 20:22:13,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-27 20:22:13,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-27 20:22:13,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 20:22:13,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-10-27 20:22:13,887 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2020-10-27 20:22:13,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:13,888 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-10-27 20:22:13,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 20:22:13,888 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-10-27 20:22:13,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 20:22:13,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:13,889 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:13,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 20:22:13,889 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:13,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:13,890 INFO L82 PathProgramCache]: Analyzing trace with hash -685169998, now seen corresponding path program 15 times [2020-10-27 20:22:13,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:13,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428048967] [2020-10-27 20:22:13,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:13,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:13,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:14,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:14,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:14,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:14,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:14,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:14,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:14,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:14,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:14,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:14,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:14,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:14,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:14,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:14,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:14,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:14,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:14,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:14,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:14,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:14,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:14,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:14,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:14,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:15,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:17,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:17,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 20:22:17,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 25 [2020-10-27 20:22:17,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3847 [2020-10-27 20:22:17,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:17,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 20:22:17,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:22:17,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 20:22:17,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:18,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:18,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:18,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:18,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:18,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:18,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:18,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:22:18,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:18,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:18,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:18,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:18,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:18,584 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:22:18,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428048967] [2020-10-27 20:22:18,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:18,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 20:22:18,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648470046] [2020-10-27 20:22:18,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 20:22:18,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:18,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 20:22:18,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:22:18,598 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 29 states. [2020-10-27 20:22:18,775 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 32 [2020-10-27 20:22:18,896 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 34 [2020-10-27 20:22:19,022 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 33 [2020-10-27 20:22:19,159 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 35 [2020-10-27 20:22:19,293 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 35 [2020-10-27 20:22:19,423 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 35 [2020-10-27 20:22:19,688 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 35 [2020-10-27 20:22:22,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:22,239 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2020-10-27 20:22:22,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 20:22:22,240 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 62 [2020-10-27 20:22:22,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:22,241 INFO L225 Difference]: With dead ends: 74 [2020-10-27 20:22:22,241 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 20:22:22,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=837, Invalid=2243, Unknown=0, NotChecked=0, Total=3080 [2020-10-27 20:22:22,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 20:22:22,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-27 20:22:22,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 20:22:22,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-10-27 20:22:22,269 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 62 [2020-10-27 20:22:22,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:22,269 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-10-27 20:22:22,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 20:22:22,270 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-10-27 20:22:22,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 20:22:22,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:22,271 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:22,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 20:22:22,272 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:22,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:22,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1901660690, now seen corresponding path program 16 times [2020-10-27 20:22:22,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:22,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922050715] [2020-10-27 20:22:22,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:22,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:22,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:22,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:22,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:22,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:22,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:22,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:22,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:22,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:22,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:22,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:22,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:22,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:22,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:22,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:22,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:22,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:22,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:22,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:22,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:22,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:22,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:22,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:22,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:22,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:22,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:22,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:23,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:25,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:25,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 20:22:25,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 27 [2020-10-27 20:22:25,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3498 [2020-10-27 20:22:25,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:25,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 20:22:25,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:22:25,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 20:22:25,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:26,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:26,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:26,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:26,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:26,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:26,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:26,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:22:26,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:26,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:26,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:26,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:26,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:26,709 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:22:26,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922050715] [2020-10-27 20:22:26,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:26,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 20:22:26,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917468610] [2020-10-27 20:22:26,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 20:22:26,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:26,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 20:22:26,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:22:26,711 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 31 states. [2020-10-27 20:22:27,009 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 34 [2020-10-27 20:22:27,139 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 33 [2020-10-27 20:22:27,284 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 35 [2020-10-27 20:22:27,430 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 35 [2020-10-27 20:22:27,577 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 35 [2020-10-27 20:22:27,739 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 35 [2020-10-27 20:22:27,892 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 35 [2020-10-27 20:22:28,334 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 35 [2020-10-27 20:22:30,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:30,797 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2020-10-27 20:22:30,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 20:22:30,798 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 66 [2020-10-27 20:22:30,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:30,799 INFO L225 Difference]: With dead ends: 78 [2020-10-27 20:22:30,799 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 20:22:30,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=950, Invalid=2590, Unknown=0, NotChecked=0, Total=3540 [2020-10-27 20:22:30,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 20:22:30,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-27 20:22:30,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 20:22:30,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2020-10-27 20:22:30,811 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 66 [2020-10-27 20:22:30,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:30,811 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2020-10-27 20:22:30,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 20:22:30,811 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2020-10-27 20:22:30,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 20:22:30,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:30,812 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:30,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 20:22:30,813 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:30,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:30,813 INFO L82 PathProgramCache]: Analyzing trace with hash -531576022, now seen corresponding path program 17 times [2020-10-27 20:22:30,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:30,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458659524] [2020-10-27 20:22:30,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:30,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:30,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:31,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:31,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:31,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:31,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:31,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:31,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:31,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:31,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:31,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:31,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:31,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:31,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:31,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:31,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:31,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:31,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:31,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:31,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:31,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:31,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:31,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:31,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:31,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:31,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:31,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:31,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:31,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:31,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:34,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:34,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 20:22:34,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 29 [2020-10-27 20:22:34,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3559 [2020-10-27 20:22:34,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:34,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 20:22:34,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:22:34,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 20:22:34,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:35,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:35,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:35,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:35,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:35,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:35,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:35,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:22:35,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:35,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:35,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:35,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:35,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:35,305 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:22:35,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458659524] [2020-10-27 20:22:35,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:35,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 20:22:35,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134097123] [2020-10-27 20:22:35,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 20:22:35,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:35,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 20:22:35,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 20:22:35,307 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 33 states. [2020-10-27 20:22:35,522 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 32 [2020-10-27 20:22:35,671 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 34 [2020-10-27 20:22:35,822 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 33 [2020-10-27 20:22:35,973 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 35 [2020-10-27 20:22:36,129 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 35 [2020-10-27 20:22:36,288 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 35 [2020-10-27 20:22:36,455 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 35 [2020-10-27 20:22:36,611 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 35 [2020-10-27 20:22:36,767 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 35 [2020-10-27 20:22:36,916 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 35 [2020-10-27 20:22:37,074 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 35 [2020-10-27 20:22:37,228 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 35 [2020-10-27 20:22:39,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:39,950 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-10-27 20:22:39,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 20:22:39,951 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 70 [2020-10-27 20:22:39,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:39,952 INFO L225 Difference]: With dead ends: 82 [2020-10-27 20:22:39,952 INFO L226 Difference]: Without dead ends: 75 [2020-10-27 20:22:39,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1085, Invalid=2947, Unknown=0, NotChecked=0, Total=4032 [2020-10-27 20:22:39,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-27 20:22:39,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-27 20:22:39,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-27 20:22:39,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2020-10-27 20:22:39,963 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 70 [2020-10-27 20:22:39,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:39,963 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2020-10-27 20:22:39,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 20:22:39,963 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2020-10-27 20:22:39,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-27 20:22:39,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:39,964 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:39,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 20:22:39,964 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:39,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:39,965 INFO L82 PathProgramCache]: Analyzing trace with hash -229268890, now seen corresponding path program 18 times [2020-10-27 20:22:39,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:39,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158189326] [2020-10-27 20:22:39,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:39,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:39,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:40,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:40,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:40,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:40,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:40,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:40,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:40,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:40,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:40,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:40,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:40,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:40,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:40,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:40,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:40,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:40,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:40,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:40,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:41,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:41,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:41,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:41,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:41,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:41,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:41,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:41,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:41,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:42,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:42,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:44,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:44,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 20:22:44,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 30 [2020-10-27 20:22:44,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 20:22:44,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:44,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 20:22:44,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:22:44,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 20:22:44,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:46,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:46,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:46,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:46,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:46,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:46,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:46,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:22:46,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:46,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:46,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:46,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:46,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:46,073 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:22:46,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158189326] [2020-10-27 20:22:46,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:46,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 20:22:46,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606048019] [2020-10-27 20:22:46,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 20:22:46,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:46,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 20:22:46,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 20:22:46,076 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 35 states. [2020-10-27 20:22:46,460 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 34 [2020-10-27 20:22:46,626 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 33 [2020-10-27 20:22:46,799 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 35 [2020-10-27 20:22:46,961 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 35 [2020-10-27 20:22:47,124 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 35 [2020-10-27 20:22:47,289 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 35 [2020-10-27 20:22:47,456 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 35 [2020-10-27 20:22:47,619 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 35 [2020-10-27 20:22:47,779 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 35 [2020-10-27 20:22:47,943 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 35 [2020-10-27 20:22:48,264 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 35 [2020-10-27 20:22:51,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:51,363 INFO L93 Difference]: Finished difference Result 86 states and 87 transitions. [2020-10-27 20:22:51,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 20:22:51,364 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 74 [2020-10-27 20:22:51,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:51,365 INFO L225 Difference]: With dead ends: 86 [2020-10-27 20:22:51,365 INFO L226 Difference]: Without dead ends: 79 [2020-10-27 20:22:51,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1196, Invalid=3360, Unknown=0, NotChecked=0, Total=4556 [2020-10-27 20:22:51,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-27 20:22:51,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-27 20:22:51,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-27 20:22:51,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2020-10-27 20:22:51,375 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 74 [2020-10-27 20:22:51,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:51,376 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2020-10-27 20:22:51,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 20:22:51,376 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2020-10-27 20:22:51,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 20:22:51,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:51,377 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:51,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 20:22:51,377 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:51,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:51,377 INFO L82 PathProgramCache]: Analyzing trace with hash 996440994, now seen corresponding path program 19 times [2020-10-27 20:22:51,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:51,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562361792] [2020-10-27 20:22:51,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:51,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:51,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:51,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:51,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:51,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:51,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:51,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:51,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:51,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:51,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:51,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:52,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:52,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:52,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:52,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:52,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:52,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:52,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:52,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:52,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:52,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:52,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:53,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:53,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:53,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:53,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:53,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:53,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:53,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:53,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:53,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:53,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:53,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:56,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:56,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 20:22:56,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 32 [2020-10-27 20:22:56,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 20:22:56,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:56,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 20:22:56,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:22:56,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 20:22:56,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:57,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:57,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:57,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:57,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:57,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:57,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:57,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:22:57,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:57,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:57,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:57,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:57,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:57,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:22:57,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562361792] [2020-10-27 20:22:57,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:57,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 20:22:57,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700774940] [2020-10-27 20:22:57,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 20:22:57,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:57,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 20:22:57,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 20:22:57,571 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 37 states. [2020-10-27 20:22:57,784 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 32 [2020-10-27 20:22:57,965 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 34 [2020-10-27 20:22:58,141 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 33 [2020-10-27 20:22:58,323 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 35 [2020-10-27 20:22:58,503 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 35 [2020-10-27 20:22:58,698 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 35 [2020-10-27 20:22:58,884 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 35 [2020-10-27 20:22:59,062 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 35 [2020-10-27 20:22:59,235 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 35 [2020-10-27 20:22:59,413 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 35 [2020-10-27 20:22:59,594 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 35 [2020-10-27 20:22:59,769 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 35 [2020-10-27 20:22:59,960 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 35 [2020-10-27 20:23:00,152 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 35 [2020-10-27 20:23:00,363 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 35 [2020-10-27 20:23:00,560 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 35 [2020-10-27 20:23:00,746 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 35 [2020-10-27 20:23:00,931 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 35 [2020-10-27 20:23:03,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:03,705 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2020-10-27 20:23:03,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 20:23:03,706 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 78 [2020-10-27 20:23:03,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:03,707 INFO L225 Difference]: With dead ends: 90 [2020-10-27 20:23:03,707 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 20:23:03,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1354, Invalid=3758, Unknown=0, NotChecked=0, Total=5112 [2020-10-27 20:23:03,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 20:23:03,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-27 20:23:03,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 20:23:03,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2020-10-27 20:23:03,717 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 78 [2020-10-27 20:23:03,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:03,717 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2020-10-27 20:23:03,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 20:23:03,718 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2020-10-27 20:23:03,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 20:23:03,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:03,719 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:03,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 20:23:03,719 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:03,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:03,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1118590686, now seen corresponding path program 20 times [2020-10-27 20:23:03,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:03,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447577300] [2020-10-27 20:23:03,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:03,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:03,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:04,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:04,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:04,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:04,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:04,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:04,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:04,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:04,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:04,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:04,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:04,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:04,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:04,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:04,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:04,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:04,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:05,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:05,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:05,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:05,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:05,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:05,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:05,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:05,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:05,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:05,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:05,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:05,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:06,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:06,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:06,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:06,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:06,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:08,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:08,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:08,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 20:23:08,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 35 [2020-10-27 20:23:08,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 20:23:08,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:08,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 20:23:08,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:23:08,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 20:23:08,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:10,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:10,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:10,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:10,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:10,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:10,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:10,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:23:10,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:10,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:10,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:10,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:10,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:10,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:23:10,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447577300] [2020-10-27 20:23:10,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:10,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 20:23:10,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145787735] [2020-10-27 20:23:10,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 20:23:10,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:10,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 20:23:10,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 20:23:10,074 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 39 states. [2020-10-27 20:23:10,487 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 34 [2020-10-27 20:23:10,673 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 33 [2020-10-27 20:23:10,861 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 35 [2020-10-27 20:23:11,046 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 35 [2020-10-27 20:23:11,235 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 35 [2020-10-27 20:23:11,428 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 35 [2020-10-27 20:23:11,617 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 35 [2020-10-27 20:23:11,804 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 35 [2020-10-27 20:23:11,993 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 35 [2020-10-27 20:23:12,184 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 35 [2020-10-27 20:23:12,369 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 35 [2020-10-27 20:23:12,561 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 35 [2020-10-27 20:23:12,758 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 35 [2020-10-27 20:23:12,953 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 35 [2020-10-27 20:23:13,156 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 35 [2020-10-27 20:23:13,340 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 35 [2020-10-27 20:23:13,525 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 35 [2020-10-27 20:23:13,726 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 35 [2020-10-27 20:23:13,920 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 35 [2020-10-27 20:23:14,116 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 35 [2020-10-27 20:23:16,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:16,839 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2020-10-27 20:23:16,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 20:23:16,845 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 82 [2020-10-27 20:23:16,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:16,846 INFO L225 Difference]: With dead ends: 94 [2020-10-27 20:23:16,846 INFO L226 Difference]: Without dead ends: 87 [2020-10-27 20:23:16,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1495, Invalid=4205, Unknown=0, NotChecked=0, Total=5700 [2020-10-27 20:23:16,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-27 20:23:16,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-10-27 20:23:16,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-27 20:23:16,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2020-10-27 20:23:16,859 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 82 [2020-10-27 20:23:16,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:16,859 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2020-10-27 20:23:16,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 20:23:16,860 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2020-10-27 20:23:16,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-27 20:23:16,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:16,860 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:16,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 20:23:16,861 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:16,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:16,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1608266778, now seen corresponding path program 21 times [2020-10-27 20:23:16,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:16,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052354333] [2020-10-27 20:23:16,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:16,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:16,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:17,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:17,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:17,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:17,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:17,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:17,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:17,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:17,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:17,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:17,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:17,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:17,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:17,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:17,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:17,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:17,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:17,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:17,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:17,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:17,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:17,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:17,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:17,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:17,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:17,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:17,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:17,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:17,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:17,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:17,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:17,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:17,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:18,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:18,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:18,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:21,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:21,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:21,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 20:23:21,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 37 [2020-10-27 20:23:21,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 20:23:21,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:21,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 20:23:21,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:23:21,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 20:23:21,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:23,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:23,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:23,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:23,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:23,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:23,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:23,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:23:23,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:23,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:23,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:23,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:23,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:23,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:23:23,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052354333] [2020-10-27 20:23:23,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:23,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 20:23:23,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197346954] [2020-10-27 20:23:23,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 20:23:23,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:23,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 20:23:23,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 20:23:23,357 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 41 states. [2020-10-27 20:23:23,612 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 32 [2020-10-27 20:23:23,828 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 34 [2020-10-27 20:23:24,031 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 33 [2020-10-27 20:23:24,243 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 35 [2020-10-27 20:23:24,451 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 35 [2020-10-27 20:23:24,653 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 35 [2020-10-27 20:23:24,855 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 35 [2020-10-27 20:23:25,059 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 35 [2020-10-27 20:23:25,277 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 35 [2020-10-27 20:23:25,493 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 35 [2020-10-27 20:23:25,707 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 35 [2020-10-27 20:23:25,916 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 35 [2020-10-27 20:23:26,122 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 35 [2020-10-27 20:23:26,321 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 35 [2020-10-27 20:23:26,524 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 35 [2020-10-27 20:23:26,730 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 35 [2020-10-27 20:23:26,931 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 35 [2020-10-27 20:23:27,139 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 35 [2020-10-27 20:23:27,336 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 35 [2020-10-27 20:23:27,532 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 35 [2020-10-27 20:23:27,732 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 35 [2020-10-27 20:23:30,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:30,968 INFO L93 Difference]: Finished difference Result 98 states and 99 transitions. [2020-10-27 20:23:30,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 20:23:30,969 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 86 [2020-10-27 20:23:30,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:30,970 INFO L225 Difference]: With dead ends: 98 [2020-10-27 20:23:30,971 INFO L226 Difference]: Without dead ends: 91 [2020-10-27 20:23:30,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1665, Invalid=4655, Unknown=0, NotChecked=0, Total=6320 [2020-10-27 20:23:30,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-27 20:23:30,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-27 20:23:30,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 20:23:30,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2020-10-27 20:23:30,981 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 86 [2020-10-27 20:23:30,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:30,982 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2020-10-27 20:23:30,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 20:23:30,982 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2020-10-27 20:23:30,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-27 20:23:30,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:30,983 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:30,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 20:23:30,983 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:30,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:30,983 INFO L82 PathProgramCache]: Analyzing trace with hash 2065896278, now seen corresponding path program 22 times [2020-10-27 20:23:30,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:30,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164684316] [2020-10-27 20:23:30,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:31,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:31,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:31,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:31,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:31,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:31,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:31,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:31,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:31,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:31,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:31,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:31,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:31,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:31,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:31,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:31,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:31,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:31,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:31,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:31,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:31,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:31,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:31,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:31,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:31,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:32,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:32,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:32,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:32,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:32,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:32,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:32,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:32,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:33,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:33,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:33,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:33,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:33,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:33,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:34,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:36,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:36,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 20:23:36,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 39 [2020-10-27 20:23:36,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 20:23:36,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:36,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 20:23:36,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:23:36,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 20:23:36,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:37,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:37,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:37,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:37,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:37,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:37,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:37,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:23:37,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:37,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:37,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:37,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:37,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:37,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:23:37,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164684316] [2020-10-27 20:23:37,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:37,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 20:23:37,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228835940] [2020-10-27 20:23:37,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 20:23:37,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:37,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 20:23:37,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 20:23:37,640 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 43 states. [2020-10-27 20:23:37,931 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 32 [2020-10-27 20:23:38,142 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 34 [2020-10-27 20:23:38,366 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 33 [2020-10-27 20:23:38,591 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 35 [2020-10-27 20:23:38,825 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 35 [2020-10-27 20:23:39,061 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 35 [2020-10-27 20:23:39,278 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 35 [2020-10-27 20:23:39,490 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 35 [2020-10-27 20:23:39,703 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 35 [2020-10-27 20:23:39,915 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 35 [2020-10-27 20:23:40,133 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 35 [2020-10-27 20:23:40,339 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 35 [2020-10-27 20:23:40,557 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 35 [2020-10-27 20:23:40,768 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 35 [2020-10-27 20:23:40,982 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 35 [2020-10-27 20:23:41,198 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 35 [2020-10-27 20:23:41,407 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 35 [2020-10-27 20:23:41,613 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 35 [2020-10-27 20:23:41,823 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 35 [2020-10-27 20:23:42,025 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 35 [2020-10-27 20:23:42,232 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 35 [2020-10-27 20:23:42,435 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 35 [2020-10-27 20:23:42,645 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 35 [2020-10-27 20:23:42,846 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 35 [2020-10-27 20:23:46,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:46,130 INFO L93 Difference]: Finished difference Result 102 states and 103 transitions. [2020-10-27 20:23:46,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 20:23:46,131 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 90 [2020-10-27 20:23:46,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:46,132 INFO L225 Difference]: With dead ends: 102 [2020-10-27 20:23:46,132 INFO L226 Difference]: Without dead ends: 95 [2020-10-27 20:23:46,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=1842, Invalid=5130, Unknown=0, NotChecked=0, Total=6972 [2020-10-27 20:23:46,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-27 20:23:46,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-27 20:23:46,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 20:23:46,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2020-10-27 20:23:46,141 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 90 [2020-10-27 20:23:46,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:46,142 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2020-10-27 20:23:46,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 20:23:46,142 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2020-10-27 20:23:46,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-27 20:23:46,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:46,142 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:46,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 20:23:46,143 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:46,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:46,143 INFO L82 PathProgramCache]: Analyzing trace with hash -852495214, now seen corresponding path program 23 times [2020-10-27 20:23:46,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:46,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442460422] [2020-10-27 20:23:46,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:46,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:46,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:46,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:46,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:46,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:46,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:46,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:46,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:46,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:46,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:46,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:46,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:46,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:47,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:47,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:47,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:47,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:47,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:47,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:47,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:47,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:47,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:47,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:47,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:47,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:47,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:47,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:47,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:47,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:48,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:48,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:48,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:48,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:48,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:48,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:48,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:48,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:48,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:48,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:48,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:48,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:48,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:51,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:51,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-27 20:23:51,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 41 [2020-10-27 20:23:51,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 20:23:51,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:51,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-27 20:23:51,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:23:51,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 20:23:51,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:53,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:53,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:53,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:53,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:53,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:53,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:53,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:23:53,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:53,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:53,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:53,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:53,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:53,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:23:53,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442460422] [2020-10-27 20:23:53,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:53,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-27 20:23:53,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062716715] [2020-10-27 20:23:53,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-27 20:23:53,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:53,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-27 20:23:53,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 20:23:53,074 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 45 states. [2020-10-27 20:23:53,582 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 34 [2020-10-27 20:23:53,811 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 33 [2020-10-27 20:23:54,040 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 35 [2020-10-27 20:23:54,276 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 35 [2020-10-27 20:23:54,512 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 35 [2020-10-27 20:23:54,745 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 35 [2020-10-27 20:23:54,981 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 35 [2020-10-27 20:23:55,215 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 35 [2020-10-27 20:23:55,440 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 35 [2020-10-27 20:23:55,676 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 35 [2020-10-27 20:23:55,903 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 35 [2020-10-27 20:23:56,134 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 35 [2020-10-27 20:23:56,360 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 35 [2020-10-27 20:23:56,588 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 35 [2020-10-27 20:23:56,823 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 35 [2020-10-27 20:23:57,046 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 35 [2020-10-27 20:23:57,275 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 35 [2020-10-27 20:23:57,499 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 35 [2020-10-27 20:23:57,721 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 35 [2020-10-27 20:23:57,944 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 35 [2020-10-27 20:23:58,163 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 35 [2020-10-27 20:23:58,383 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 35 [2020-10-27 20:23:58,594 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 35 [2020-10-27 20:23:58,811 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 35 [2020-10-27 20:23:59,025 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 35 [2020-10-27 20:23:59,242 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 35 [2020-10-27 20:24:02,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:02,497 INFO L93 Difference]: Finished difference Result 106 states and 107 transitions. [2020-10-27 20:24:02,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 20:24:02,499 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 94 [2020-10-27 20:24:02,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:02,500 INFO L225 Difference]: With dead ends: 106 [2020-10-27 20:24:02,500 INFO L226 Difference]: Without dead ends: 99 [2020-10-27 20:24:02,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=1990, Invalid=5666, Unknown=0, NotChecked=0, Total=7656 [2020-10-27 20:24:02,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-27 20:24:02,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-10-27 20:24:02,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-27 20:24:02,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2020-10-27 20:24:02,513 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 94 [2020-10-27 20:24:02,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:02,513 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2020-10-27 20:24:02,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-27 20:24:02,513 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2020-10-27 20:24:02,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-27 20:24:02,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:02,514 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:02,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 20:24:02,515 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:02,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:02,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1624123442, now seen corresponding path program 24 times [2020-10-27 20:24:02,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:02,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32244734] [2020-10-27 20:24:02,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:02,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:02,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:03,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:03,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:03,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:03,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:03,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:03,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:03,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:03,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:03,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:03,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:03,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:03,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:03,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:03,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:03,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:03,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:03,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:03,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:03,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:03,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:03,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:03,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:03,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:03,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:03,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:03,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:03,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:03,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:03,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:03,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:03,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:03,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:03,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:03,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:03,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:03,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:03,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:03,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:04,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:04,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:04,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:04,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:07,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:07,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-27 20:24:07,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 43 [2020-10-27 20:24:07,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 20:24:07,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:07,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-27 20:24:07,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:24:07,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-27 20:24:07,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:09,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:09,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:09,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:09,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:09,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:09,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:09,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:24:09,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:09,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:09,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:09,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:09,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:09,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:24:09,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [32244734] [2020-10-27 20:24:09,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:09,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-27 20:24:09,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662679646] [2020-10-27 20:24:09,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-27 20:24:09,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:09,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-27 20:24:09,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 20:24:09,699 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 47 states. [2020-10-27 20:24:09,988 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 32 [2020-10-27 20:24:10,249 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 34 [2020-10-27 20:24:10,494 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 33 [2020-10-27 20:24:10,748 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 35 [2020-10-27 20:24:10,998 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 35 [2020-10-27 20:24:11,253 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 35 [2020-10-27 20:24:11,503 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 35 [2020-10-27 20:24:11,758 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 35 [2020-10-27 20:24:12,033 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 35 [2020-10-27 20:24:12,288 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 35 [2020-10-27 20:24:12,543 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 35 [2020-10-27 20:24:12,790 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 35 [2020-10-27 20:24:13,044 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 35 [2020-10-27 20:24:13,307 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 35 [2020-10-27 20:24:13,564 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 35 [2020-10-27 20:24:13,817 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 35 [2020-10-27 20:24:14,069 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 35 [2020-10-27 20:24:14,317 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 35 [2020-10-27 20:24:14,563 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 35 [2020-10-27 20:24:14,809 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 35 [2020-10-27 20:24:15,054 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 35 [2020-10-27 20:24:15,307 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 35 [2020-10-27 20:24:15,553 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 35 [2020-10-27 20:24:15,800 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 35 [2020-10-27 20:24:16,055 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 35 [2020-10-27 20:24:16,305 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 35 [2020-10-27 20:24:16,554 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 35 [2020-10-27 20:24:16,795 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 35 [2020-10-27 20:24:17,028 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 35 [2020-10-27 20:24:17,273 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 35 [2020-10-27 20:24:20,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:20,530 INFO L93 Difference]: Finished difference Result 110 states and 111 transitions. [2020-10-27 20:24:20,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-27 20:24:20,531 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 98 [2020-10-27 20:24:20,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:20,533 INFO L225 Difference]: With dead ends: 110 [2020-10-27 20:24:20,533 INFO L226 Difference]: Without dead ends: 103 [2020-10-27 20:24:20,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=2187, Invalid=6185, Unknown=0, NotChecked=0, Total=8372 [2020-10-27 20:24:20,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-27 20:24:20,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-10-27 20:24:20,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-27 20:24:20,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2020-10-27 20:24:20,542 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 98 [2020-10-27 20:24:20,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:20,543 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2020-10-27 20:24:20,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-27 20:24:20,543 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2020-10-27 20:24:20,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-27 20:24:20,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:20,543 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:20,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 20:24:20,544 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:20,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:20,544 INFO L82 PathProgramCache]: Analyzing trace with hash 181910794, now seen corresponding path program 25 times [2020-10-27 20:24:20,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:20,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280192096] [2020-10-27 20:24:20,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:20,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:20,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:21,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:21,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:21,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:21,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:21,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:21,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:21,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:21,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:21,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:21,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:21,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:21,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:21,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:21,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:21,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:22,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:22,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:22,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:22,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:22,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:22,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:22,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:22,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:22,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:22,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:22,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:23,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:23,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:23,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:23,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:23,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:23,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:23,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:23,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:23,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:23,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:23,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:23,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:24,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:24,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:24,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:24,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:24,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:24,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:25,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:25,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-27 20:24:25,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 45 [2020-10-27 20:24:25,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-27 20:24:25,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:25,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-27 20:24:25,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:24:25,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-27 20:24:25,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:28,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:28,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:28,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:28,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:28,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:28,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:28,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:24:28,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:28,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:28,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:28,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:28,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:28,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:24:28,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280192096] [2020-10-27 20:24:28,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:28,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-27 20:24:28,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447102550] [2020-10-27 20:24:28,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-27 20:24:28,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:28,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-27 20:24:28,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 20:24:28,048 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 49 states. [2020-10-27 20:24:28,392 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 32 [2020-10-27 20:24:28,663 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 34 [2020-10-27 20:24:28,926 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 33 [2020-10-27 20:24:29,190 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 35 [2020-10-27 20:24:29,456 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 35 [2020-10-27 20:24:29,727 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 35 [2020-10-27 20:24:29,998 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 35 [2020-10-27 20:24:30,274 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 35 [2020-10-27 20:24:30,541 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 35 [2020-10-27 20:24:30,804 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 35 [2020-10-27 20:24:31,086 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 35 [2020-10-27 20:24:31,358 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 35 [2020-10-27 20:24:31,633 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 35 [2020-10-27 20:24:31,908 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 35 [2020-10-27 20:24:32,180 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 35 [2020-10-27 20:24:32,457 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 35 [2020-10-27 20:24:32,736 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 35 [2020-10-27 20:24:33,032 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 35 [2020-10-27 20:24:33,314 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 35 [2020-10-27 20:24:33,599 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 35 [2020-10-27 20:24:33,878 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 35 [2020-10-27 20:24:34,149 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 35 [2020-10-27 20:24:34,421 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 35 [2020-10-27 20:24:34,694 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 35 [2020-10-27 20:24:34,962 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 35 [2020-10-27 20:24:35,234 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 35 [2020-10-27 20:24:35,497 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 35 [2020-10-27 20:24:35,757 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 35 [2020-10-27 20:24:36,022 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 35 [2020-10-27 20:24:36,272 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 35 [2020-10-27 20:24:36,529 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 35 [2020-10-27 20:24:36,792 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 35 [2020-10-27 20:24:37,039 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 35 [2020-10-27 20:24:40,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:40,366 INFO L93 Difference]: Finished difference Result 114 states and 115 transitions. [2020-10-27 20:24:40,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-27 20:24:40,367 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 102 [2020-10-27 20:24:40,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:40,368 INFO L225 Difference]: With dead ends: 114 [2020-10-27 20:24:40,368 INFO L226 Difference]: Without dead ends: 107 [2020-10-27 20:24:40,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=2387, Invalid=6733, Unknown=0, NotChecked=0, Total=9120 [2020-10-27 20:24:40,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-27 20:24:40,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-10-27 20:24:40,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-27 20:24:40,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-10-27 20:24:40,381 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 102 [2020-10-27 20:24:40,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:40,382 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-10-27 20:24:40,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-27 20:24:40,382 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-10-27 20:24:40,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-27 20:24:40,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:40,382 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:40,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 20:24:40,383 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:40,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:40,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1169120186, now seen corresponding path program 26 times [2020-10-27 20:24:40,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:40,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705772760] [2020-10-27 20:24:40,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:40,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:40,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:41,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:41,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:41,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:41,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:41,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:41,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:41,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:41,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:41,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:41,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:41,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:41,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:41,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:41,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:41,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:41,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:41,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:41,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:41,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:41,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:41,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:41,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:41,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:41,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:41,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:41,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:42,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:42,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:42,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:42,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:42,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:42,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:42,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:42,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:42,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:42,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:42,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:42,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:42,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:42,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:42,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:42,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:42,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:42,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:42,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:42,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:44,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:44,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-27 20:24:44,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 47 [2020-10-27 20:24:44,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4013 [2020-10-27 20:24:44,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:44,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-27 20:24:44,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:24:44,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-27 20:24:44,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:47,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:47,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:47,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:47,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:47,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:47,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:47,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:24:47,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:47,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:47,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:47,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:47,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:47,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:24:47,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705772760] [2020-10-27 20:24:47,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:47,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-27 20:24:47,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800953361] [2020-10-27 20:24:47,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-27 20:24:47,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:47,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-27 20:24:47,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=2652, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 20:24:47,471 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 53 states. [2020-10-27 20:24:47,906 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 35 [2020-10-27 20:24:48,204 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 35 [2020-10-27 20:24:48,485 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 35 [2020-10-27 20:24:48,767 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 35 [2020-10-27 20:24:49,049 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 35 [2020-10-27 20:24:49,330 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 35 [2020-10-27 20:24:49,627 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 35 [2020-10-27 20:24:49,908 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 35 [2020-10-27 20:24:50,191 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 35 [2020-10-27 20:24:50,480 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 35 [2020-10-27 20:24:50,758 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 35 [2020-10-27 20:24:51,043 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 35 [2020-10-27 20:24:51,329 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 35 [2020-10-27 20:24:51,625 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 35 [2020-10-27 20:24:51,917 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 35 [2020-10-27 20:24:52,212 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 35 [2020-10-27 20:24:52,510 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 35 [2020-10-27 20:24:52,790 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 35 [2020-10-27 20:24:53,063 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 35 [2020-10-27 20:24:53,341 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 35 [2020-10-27 20:24:53,625 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 35 [2020-10-27 20:24:53,908 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 35 [2020-10-27 20:24:54,192 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 35 [2020-10-27 20:24:54,473 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 35 [2020-10-27 20:24:54,759 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 35 [2020-10-27 20:24:55,043 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 35 [2020-10-27 20:24:55,319 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 35 [2020-10-27 20:24:55,601 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 35 [2020-10-27 20:24:55,879 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 35 [2020-10-27 20:24:56,158 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 35 [2020-10-27 20:24:56,428 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 35 [2020-10-27 20:24:56,698 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 35 [2020-10-27 20:24:56,965 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 35 [2020-10-27 20:24:57,230 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 35 [2020-10-27 20:25:00,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:25:00,860 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2020-10-27 20:25:00,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-27 20:25:00,861 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 106 [2020-10-27 20:25:00,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:25:00,863 INFO L225 Difference]: With dead ends: 116 [2020-10-27 20:25:00,863 INFO L226 Difference]: Without dead ends: 109 [2020-10-27 20:25:00,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=2470, Invalid=8036, Unknown=0, NotChecked=0, Total=10506 [2020-10-27 20:25:00,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-27 20:25:00,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-10-27 20:25:00,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-27 20:25:00,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2020-10-27 20:25:00,877 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2020-10-27 20:25:00,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:25:00,878 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2020-10-27 20:25:00,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-27 20:25:00,878 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2020-10-27 20:25:00,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-27 20:25:00,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:25:00,879 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:25:00,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 20:25:00,879 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:25:00,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:25:00,880 INFO L82 PathProgramCache]: Analyzing trace with hash -93460316, now seen corresponding path program 27 times [2020-10-27 20:25:00,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:25:00,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476503637] [2020-10-27 20:25:00,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:25:00,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:00,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... 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[2020-10-27 20:25:05,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:05,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-27 20:25:05,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 45 [2020-10-27 20:25:05,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 20:25:05,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:05,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-27 20:25:05,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:25:05,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-27 20:25:05,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0