/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_two_index_02.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 09:07:28,188 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 09:07:28,192 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 09:07:28,250 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 09:07:28,250 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 09:07:28,257 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 09:07:28,260 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 09:07:28,264 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 09:07:28,268 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 09:07:28,274 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 09:07:28,275 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 09:07:28,277 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 09:07:28,277 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 09:07:28,280 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 09:07:28,283 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 09:07:28,285 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 09:07:28,286 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 09:07:28,289 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 09:07:28,300 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 09:07:28,306 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 09:07:28,311 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 09:07:28,313 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 09:07:28,314 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 09:07:28,315 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 09:07:28,318 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 09:07:28,318 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 09:07:28,318 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 09:07:28,319 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 09:07:28,320 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 09:07:28,321 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 09:07:28,321 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 09:07:28,322 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 09:07:28,323 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 09:07:28,324 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 09:07:28,325 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 09:07:28,325 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 09:07:28,326 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 09:07:28,326 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 09:07:28,327 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 09:07:28,328 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 09:07:28,328 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 09:07:28,330 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 09:07:28,358 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 09:07:28,359 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 09:07:28,360 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 09:07:28,360 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 09:07:28,361 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 09:07:28,362 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 09:07:28,362 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 09:07:28,362 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 09:07:28,363 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 09:07:28,363 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 09:07:28,363 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 09:07:28,363 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 09:07:28,363 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 09:07:28,363 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 09:07:28,364 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 09:07:28,364 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 09:07:28,365 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 09:07:28,365 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 09:07:28,366 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 09:07:28,366 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 09:07:28,366 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 09:07:28,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:07:28,367 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 09:07:28,367 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 09:07:28,367 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 09:07:28,367 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 09:07:28,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 09:07:28,368 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 09:07:28,368 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 09:07:28,368 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 09:07:28,803 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 09:07:28,832 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 09:07:28,835 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 09:07:28,837 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 09:07:28,838 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 09:07:28,842 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_02.i [2020-10-28 09:07:28,920 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bf04663de/016544ac4ec24d9f90c176725e0e1cd7/FLAG612ae221e [2020-10-28 09:07:29,628 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 09:07:29,629 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_two_index_02.i [2020-10-28 09:07:29,643 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bf04663de/016544ac4ec24d9f90c176725e0e1cd7/FLAG612ae221e [2020-10-28 09:07:29,995 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bf04663de/016544ac4ec24d9f90c176725e0e1cd7 [2020-10-28 09:07:29,998 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 09:07:30,006 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 09:07:30,010 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 09:07:30,010 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 09:07:30,014 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 09:07:30,015 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:07:29" (1/1) ... [2020-10-28 09:07:30,019 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21cece66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:07:30, skipping insertion in model container [2020-10-28 09:07:30,019 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:07:29" (1/1) ... [2020-10-28 09:07:30,027 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 09:07:30,044 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 09:07:30,214 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:07:30,224 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 09:07:30,248 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:07:30,266 INFO L208 MainTranslator]: Completed translation [2020-10-28 09:07:30,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:07:30 WrapperNode [2020-10-28 09:07:30,267 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 09:07:30,268 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 09:07:30,268 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 09:07:30,268 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 09:07:30,283 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:07:30" (1/1) ... [2020-10-28 09:07:30,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:07:30" (1/1) ... [2020-10-28 09:07:30,292 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:07:30" (1/1) ... [2020-10-28 09:07:30,292 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:07:30" (1/1) ... [2020-10-28 09:07:30,301 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:07:30" (1/1) ... [2020-10-28 09:07:30,306 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:07:30" (1/1) ... [2020-10-28 09:07:30,308 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:07:30" (1/1) ... [2020-10-28 09:07:30,310 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 09:07:30,311 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 09:07:30,312 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 09:07:30,312 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 09:07:30,313 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:07:30" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:07:30,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 09:07:30,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 09:07:30,401 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 09:07:30,401 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 09:07:30,401 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 09:07:30,402 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 09:07:30,402 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 09:07:30,402 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 09:07:30,402 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 09:07:30,402 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 09:07:30,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 09:07:30,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 09:07:30,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 09:07:30,403 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 09:07:30,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 09:07:30,403 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 09:07:30,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 09:07:30,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 09:07:30,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 09:07:30,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 09:07:30,810 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 09:07:30,811 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-28 09:07:30,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:07:30 BoogieIcfgContainer [2020-10-28 09:07:30,813 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 09:07:30,815 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 09:07:30,815 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 09:07:30,820 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 09:07:30,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:07:29" (1/3) ... [2020-10-28 09:07:30,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2444ee8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:07:30, skipping insertion in model container [2020-10-28 09:07:30,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:07:30" (2/3) ... [2020-10-28 09:07:30,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2444ee8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:07:30, skipping insertion in model container [2020-10-28 09:07:30,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:07:30" (3/3) ... [2020-10-28 09:07:30,824 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_two_index_02.i [2020-10-28 09:07:30,839 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 09:07:30,844 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 09:07:30,859 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 09:07:30,900 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 09:07:30,900 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 09:07:30,900 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 09:07:30,901 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 09:07:30,901 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 09:07:30,901 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 09:07:30,901 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 09:07:30,901 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 09:07:30,938 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-28 09:07:30,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 09:07:30,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:30,949 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:30,950 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:30,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:30,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1774182118, now seen corresponding path program 1 times [2020-10-28 09:07:31,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:31,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895315028] [2020-10-28 09:07:31,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:31,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:31,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:31,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:31,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:31,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 09:07:31,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:07:31,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 276 [2020-10-28 09:07:31,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:31,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:31,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:31,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 09:07:31,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:31,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 09:07:31,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:31,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:31,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:31,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:31,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:31,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:31,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 09:07:31,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:31,598 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:31,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:31,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:31,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:31,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:07:31,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:07:31,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895315028] [2020-10-28 09:07:31,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:07:31,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 09:07:31,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556459248] [2020-10-28 09:07:31,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 09:07:31,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:31,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 09:07:31,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:07:31,639 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-10-28 09:07:31,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:31,750 INFO L93 Difference]: Finished difference Result 48 states and 62 transitions. [2020-10-28 09:07:31,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 09:07:31,752 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-28 09:07:31,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:31,760 INFO L225 Difference]: With dead ends: 48 [2020-10-28 09:07:31,760 INFO L226 Difference]: Without dead ends: 21 [2020-10-28 09:07:31,764 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 [2020-10-28 09:07:31,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-28 09:07:31,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-28 09:07:31,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-28 09:07:31,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-28 09:07:31,804 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2020-10-28 09:07:31,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:31,805 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-28 09:07:31,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 09:07:31,805 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-28 09:07:31,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 09:07:31,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:31,806 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:31,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 09:07:31,807 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:31,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:31,808 INFO L82 PathProgramCache]: Analyzing trace with hash 414065378, now seen corresponding path program 1 times [2020-10-28 09:07:31,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:31,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52876394] [2020-10-28 09:07:31,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:31,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:31,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:31,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:32,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:32,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 09:07:32,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:07:32,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 255 [2020-10-28 09:07:32,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:32,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:32,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:07:32,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 09:07:32,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 09:07:32,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:07:32,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:32,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:32,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:32,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:32,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:32,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:32,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:07:32,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:32,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:32,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:32,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:32,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:32,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:07:32,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:07:32,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52876394] [2020-10-28 09:07:32,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:07:32,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 09:07:32,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284118584] [2020-10-28 09:07:32,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 09:07:32,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:32,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 09:07:32,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:07:32,162 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 4 states. [2020-10-28 09:07:32,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:32,246 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-10-28 09:07:32,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 09:07:32,247 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-28 09:07:32,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:32,250 INFO L225 Difference]: With dead ends: 40 [2020-10-28 09:07:32,250 INFO L226 Difference]: Without dead ends: 26 [2020-10-28 09:07:32,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:07:32,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-28 09:07:32,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-10-28 09:07:32,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-28 09:07:32,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-28 09:07:32,264 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2020-10-28 09:07:32,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:32,264 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-28 09:07:32,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 09:07:32,265 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-28 09:07:32,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 09:07:32,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:32,266 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:32,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 09:07:32,266 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:32,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:32,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1170351871, now seen corresponding path program 1 times [2020-10-28 09:07:32,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:32,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879906533] [2020-10-28 09:07:32,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:32,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:32,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:32,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:32,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:33,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:33,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 09:07:33,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:07:33,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 875 [2020-10-28 09:07:33,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:33,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:33,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 09:07:33,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 09:07:33,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 09:07:33,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:07:33,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:33,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:33,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:33,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:33,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:33,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:33,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:07:33,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:33,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:33,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:33,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:33,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:33,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:07:33,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 09:07:33,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879906533] [2020-10-28 09:07:33,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:07:33,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 09:07:33,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961194028] [2020-10-28 09:07:33,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 09:07:33,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:33,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 09:07:33,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:07:33,222 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 5 states. [2020-10-28 09:07:33,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:33,326 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2020-10-28 09:07:33,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 09:07:33,327 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-28 09:07:33,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:33,328 INFO L225 Difference]: With dead ends: 46 [2020-10-28 09:07:33,328 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 09:07:33,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:07:33,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 09:07:33,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2020-10-28 09:07:33,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-28 09:07:33,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-28 09:07:33,338 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 19 [2020-10-28 09:07:33,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:33,338 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-28 09:07:33,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 09:07:33,338 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-28 09:07:33,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 09:07:33,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:33,339 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:33,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 09:07:33,340 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:33,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:33,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1420739774, now seen corresponding path program 2 times [2020-10-28 09:07:33,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:33,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082789147] [2020-10-28 09:07:33,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:33,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:33,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:33,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:33,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:34,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:34,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 09:07:34,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:07:34,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 960 [2020-10-28 09:07:34,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:34,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:34,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 09:07:34,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:07:34,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 09:07:34,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:34,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:34,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:34,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:34,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:34,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:34,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:34,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:07:34,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:34,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:34,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:34,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:34,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:34,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:07:34,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 09:07:34,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082789147] [2020-10-28 09:07:34,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:07:34,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 09:07:34,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749035981] [2020-10-28 09:07:34,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 09:07:34,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:34,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 09:07:34,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:07:34,383 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 6 states. [2020-10-28 09:07:34,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:34,476 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-10-28 09:07:34,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 09:07:34,476 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-28 09:07:34,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:34,477 INFO L225 Difference]: With dead ends: 45 [2020-10-28 09:07:34,478 INFO L226 Difference]: Without dead ends: 29 [2020-10-28 09:07:34,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:07:34,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-28 09:07:34,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2020-10-28 09:07:34,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-28 09:07:34,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-28 09:07:34,486 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 21 [2020-10-28 09:07:34,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:34,486 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-28 09:07:34,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 09:07:34,487 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-28 09:07:34,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 09:07:34,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:34,488 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:34,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 09:07:34,488 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:34,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:34,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1957781260, now seen corresponding path program 3 times [2020-10-28 09:07:34,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:34,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46353352] [2020-10-28 09:07:34,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:34,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:34,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:34,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:34,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:35,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:35,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 09:07:35,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:07:35,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1033 [2020-10-28 09:07:35,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:35,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:35,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 09:07:35,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:07:35,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 09:07:35,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:07:35,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:35,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:35,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:35,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:35,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:35,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:35,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:07:35,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:35,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:35,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:35,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:35,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:35,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:07:35,647 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 09:07:35,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46353352] [2020-10-28 09:07:35,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:07:35,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 09:07:35,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777156042] [2020-10-28 09:07:35,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 09:07:35,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:35,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 09:07:35,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:07:35,650 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 7 states. [2020-10-28 09:07:35,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:35,766 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2020-10-28 09:07:35,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 09:07:35,767 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-28 09:07:35,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:35,768 INFO L225 Difference]: With dead ends: 49 [2020-10-28 09:07:35,768 INFO L226 Difference]: Without dead ends: 33 [2020-10-28 09:07:35,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:07:35,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-28 09:07:35,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2020-10-28 09:07:35,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-28 09:07:35,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-28 09:07:35,777 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 22 [2020-10-28 09:07:35,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:35,778 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-28 09:07:35,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 09:07:35,778 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-28 09:07:35,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 09:07:35,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:35,779 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:35,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 09:07:35,780 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:35,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:35,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1426198142, now seen corresponding path program 4 times [2020-10-28 09:07:35,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:35,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989355640] [2020-10-28 09:07:35,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:35,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:35,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:35,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:35,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:36,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:36,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 09:07:36,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:07:36,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1130 [2020-10-28 09:07:36,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:36,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:36,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:07:36,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:07:36,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:07:36,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:07:37,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:37,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:37,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:37,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:37,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:37,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:37,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 09:07:37,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:37,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:37,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:37,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:37,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:37,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:07:37,031 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 09:07:37,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989355640] [2020-10-28 09:07:37,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:07:37,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:07:37,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555023426] [2020-10-28 09:07:37,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:07:37,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:37,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:07:37,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:07:37,035 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 8 states. [2020-10-28 09:07:37,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:37,211 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2020-10-28 09:07:37,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 09:07:37,213 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-28 09:07:37,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:37,214 INFO L225 Difference]: With dead ends: 50 [2020-10-28 09:07:37,215 INFO L226 Difference]: Without dead ends: 34 [2020-10-28 09:07:37,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:07:37,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-28 09:07:37,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2020-10-28 09:07:37,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 09:07:37,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-28 09:07:37,222 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2020-10-28 09:07:37,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:37,223 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-28 09:07:37,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:07:37,223 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-28 09:07:37,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 09:07:37,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:37,224 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:37,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 09:07:37,224 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:37,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:37,225 INFO L82 PathProgramCache]: Analyzing trace with hash -2126990668, now seen corresponding path program 5 times [2020-10-28 09:07:37,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:37,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753657046] [2020-10-28 09:07:37,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:37,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:37,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:37,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:37,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:38,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:38,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 09:07:38,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:07:38,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1535 [2020-10-28 09:07:38,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:38,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:38,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 09:07:38,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 09:07:38,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 09:07:38,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:07:38,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:38,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:38,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:38,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:38,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:38,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:38,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:07:38,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:38,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:38,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:38,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:38,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:38,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:07:38,842 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-28 09:07:38,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753657046] [2020-10-28 09:07:38,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:07:38,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 09:07:38,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45436422] [2020-10-28 09:07:38,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 09:07:38,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:38,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 09:07:38,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:07:38,845 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 6 states. [2020-10-28 09:07:38,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:38,950 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2020-10-28 09:07:38,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 09:07:38,951 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-28 09:07:38,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:38,952 INFO L225 Difference]: With dead ends: 50 [2020-10-28 09:07:38,952 INFO L226 Difference]: Without dead ends: 38 [2020-10-28 09:07:38,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:07:38,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-28 09:07:38,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2020-10-28 09:07:38,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 09:07:38,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-28 09:07:38,960 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2020-10-28 09:07:38,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:38,960 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-28 09:07:38,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 09:07:38,960 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-28 09:07:38,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 09:07:38,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:38,962 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:38,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 09:07:38,962 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:38,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:38,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1964278815, now seen corresponding path program 6 times [2020-10-28 09:07:38,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:38,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1459982044] [2020-10-28 09:07:38,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:38,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:38,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:39,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:39,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:40,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:40,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 09:07:40,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:07:40,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1667 [2020-10-28 09:07:40,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:40,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:40,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 09:07:40,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:07:40,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 09:07:40,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:40,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:40,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:40,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:40,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:40,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:40,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:40,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 09:07:40,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:40,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:40,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:40,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:40,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:40,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:07:40,748 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 09:07:40,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1459982044] [2020-10-28 09:07:40,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:07:40,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 09:07:40,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412809474] [2020-10-28 09:07:40,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 09:07:40,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:40,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 09:07:40,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:07:40,757 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 9 states. [2020-10-28 09:07:40,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:40,885 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2020-10-28 09:07:40,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 09:07:40,889 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-28 09:07:40,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:40,890 INFO L225 Difference]: With dead ends: 56 [2020-10-28 09:07:40,890 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 09:07:40,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:07:40,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 09:07:40,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2020-10-28 09:07:40,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 09:07:40,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-28 09:07:40,901 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2020-10-28 09:07:40,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:40,901 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-28 09:07:40,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 09:07:40,901 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-28 09:07:40,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 09:07:40,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:40,902 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:40,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 09:07:40,903 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:40,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:40,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1116030829, now seen corresponding path program 7 times [2020-10-28 09:07:40,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:40,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712483197] [2020-10-28 09:07:40,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:40,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:40,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:40,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:41,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:42,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:42,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 09:07:42,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:07:42,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2003 [2020-10-28 09:07:42,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:42,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:42,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:07:42,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:07:42,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 09:07:42,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:07:43,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:43,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:43,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:43,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:43,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:43,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:43,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:07:43,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:43,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:43,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:43,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:43,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:43,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:43,041 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 09:07:43,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712483197] [2020-10-28 09:07:43,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:07:43,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:07:43,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794423499] [2020-10-28 09:07:43,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:07:43,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:43,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:07:43,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:07:43,052 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 10 states. [2020-10-28 09:07:43,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:43,198 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2020-10-28 09:07:43,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:07:43,200 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-28 09:07:43,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:43,201 INFO L225 Difference]: With dead ends: 57 [2020-10-28 09:07:43,201 INFO L226 Difference]: Without dead ends: 40 [2020-10-28 09:07:43,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:07:43,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-28 09:07:43,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2020-10-28 09:07:43,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-28 09:07:43,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-28 09:07:43,214 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 26 [2020-10-28 09:07:43,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:43,214 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-28 09:07:43,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:07:43,215 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-28 09:07:43,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 09:07:43,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:43,216 INFO L422 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:43,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 09:07:43,217 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:43,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:43,217 INFO L82 PathProgramCache]: Analyzing trace with hash -590147039, now seen corresponding path program 8 times [2020-10-28 09:07:43,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:43,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2140960183] [2020-10-28 09:07:43,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:43,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:43,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:43,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:43,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:45,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:45,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 09:07:45,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:07:45,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2266 [2020-10-28 09:07:45,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:45,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:45,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 09:07:45,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:07:45,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 09:07:45,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:45,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:45,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:45,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:45,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:45,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:45,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:45,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:07:45,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:45,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:45,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:45,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:45,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:45,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:45,578 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-28 09:07:45,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2140960183] [2020-10-28 09:07:45,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:07:45,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 09:07:45,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760146522] [2020-10-28 09:07:45,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 09:07:45,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:45,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 09:07:45,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:07:45,581 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 7 states. [2020-10-28 09:07:45,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:45,710 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2020-10-28 09:07:45,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 09:07:45,711 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-28 09:07:45,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:45,712 INFO L225 Difference]: With dead ends: 56 [2020-10-28 09:07:45,712 INFO L226 Difference]: Without dead ends: 44 [2020-10-28 09:07:45,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:07:45,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-28 09:07:45,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2020-10-28 09:07:45,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 09:07:45,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-28 09:07:45,719 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 27 [2020-10-28 09:07:45,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:45,719 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-28 09:07:45,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 09:07:45,719 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-28 09:07:45,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 09:07:45,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:45,720 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:45,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 09:07:45,721 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:45,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:45,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1566766572, now seen corresponding path program 9 times [2020-10-28 09:07:45,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:45,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294036464] [2020-10-28 09:07:45,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:45,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:45,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:45,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:48,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:48,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 09:07:48,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:07:48,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2598 [2020-10-28 09:07:48,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:48,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:48,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 09:07:48,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:07:48,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 09:07:48,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:48,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:48,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:48,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:48,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:48,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:48,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:48,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:07:48,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:48,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:48,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:48,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:48,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:48,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:48,448 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-28 09:07:48,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294036464] [2020-10-28 09:07:48,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:07:48,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 09:07:48,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891303849] [2020-10-28 09:07:48,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 09:07:48,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:48,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 09:07:48,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:07:48,450 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 11 states. [2020-10-28 09:07:48,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:48,579 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2020-10-28 09:07:48,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 09:07:48,580 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-28 09:07:48,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:48,581 INFO L225 Difference]: With dead ends: 63 [2020-10-28 09:07:48,581 INFO L226 Difference]: Without dead ends: 45 [2020-10-28 09:07:48,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:07:48,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-28 09:07:48,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2020-10-28 09:07:48,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-28 09:07:48,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-28 09:07:48,587 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 28 [2020-10-28 09:07:48,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:48,587 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-28 09:07:48,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 09:07:48,587 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-28 09:07:48,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 09:07:48,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:48,588 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:48,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 09:07:48,589 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:48,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:48,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1296381986, now seen corresponding path program 10 times [2020-10-28 09:07:48,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:48,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342462979] [2020-10-28 09:07:48,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:48,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:48,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:48,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:48,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:51,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:51,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 09:07:51,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:07:51,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2540 [2020-10-28 09:07:51,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:51,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:51,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:07:51,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 09:07:51,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:07:51,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:51,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:51,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:51,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:51,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:51,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:51,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:51,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:07:51,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:51,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:51,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:51,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:51,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:51,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:51,225 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-28 09:07:51,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342462979] [2020-10-28 09:07:51,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:07:51,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:07:51,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969492154] [2020-10-28 09:07:51,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:07:51,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:51,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:07:51,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:07:51,229 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 8 states. [2020-10-28 09:07:51,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:51,347 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2020-10-28 09:07:51,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 09:07:51,348 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-10-28 09:07:51,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:51,349 INFO L225 Difference]: With dead ends: 61 [2020-10-28 09:07:51,349 INFO L226 Difference]: Without dead ends: 49 [2020-10-28 09:07:51,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:07:51,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-28 09:07:51,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2020-10-28 09:07:51,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-28 09:07:51,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-28 09:07:51,362 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2020-10-28 09:07:51,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:51,365 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-28 09:07:51,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:07:51,365 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-28 09:07:51,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 09:07:51,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:51,366 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:51,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 09:07:51,366 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:51,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:51,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1081058355, now seen corresponding path program 11 times [2020-10-28 09:07:51,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:51,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266496186] [2020-10-28 09:07:51,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:51,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:51,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:51,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:51,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:54,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:54,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 09:07:54,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:07:54,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2876 [2020-10-28 09:07:54,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:54,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:54,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:07:54,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:07:54,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 09:07:54,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:54,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:54,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:54,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:54,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:54,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:54,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:54,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:07:54,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:54,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:54,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:54,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:54,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:54,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:54,405 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-28 09:07:54,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266496186] [2020-10-28 09:07:54,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:07:54,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:07:54,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363414678] [2020-10-28 09:07:54,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:07:54,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:54,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:07:54,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:07:54,407 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 12 states. [2020-10-28 09:07:54,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:54,583 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-10-28 09:07:54,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 09:07:54,584 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-28 09:07:54,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:54,585 INFO L225 Difference]: With dead ends: 66 [2020-10-28 09:07:54,585 INFO L226 Difference]: Without dead ends: 47 [2020-10-28 09:07:54,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:07:54,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-28 09:07:54,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2020-10-28 09:07:54,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-28 09:07:54,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-28 09:07:54,591 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 30 [2020-10-28 09:07:54,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:54,591 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-28 09:07:54,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:07:54,592 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-28 09:07:54,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 09:07:54,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:54,593 INFO L422 BasicCegarLoop]: trace histogram [9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:54,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 09:07:54,593 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:54,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:54,593 INFO L82 PathProgramCache]: Analyzing trace with hash -507214143, now seen corresponding path program 12 times [2020-10-28 09:07:54,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:54,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025014648] [2020-10-28 09:07:54,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:54,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:54,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:54,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:54,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:57,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:57,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 09:07:57,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:07:57,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3057 [2020-10-28 09:07:57,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:57,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:57,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:07:57,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:07:57,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 09:07:57,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:57,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:57,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:57,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:57,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:57,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:57,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:57,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:07:57,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:57,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:57,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:57,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:57,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:57,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:57,844 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-28 09:07:57,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025014648] [2020-10-28 09:07:57,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:07:57,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 09:07:57,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22991601] [2020-10-28 09:07:57,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 09:07:57,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:57,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 09:07:57,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:07:57,847 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 13 states. [2020-10-28 09:07:58,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:58,051 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2020-10-28 09:07:58,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 09:07:58,053 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-10-28 09:07:58,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:58,054 INFO L225 Difference]: With dead ends: 70 [2020-10-28 09:07:58,054 INFO L226 Difference]: Without dead ends: 51 [2020-10-28 09:07:58,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:07:58,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-28 09:07:58,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 36. [2020-10-28 09:07:58,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 09:07:58,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-28 09:07:58,064 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2020-10-28 09:07:58,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:58,064 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-28 09:07:58,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 09:07:58,065 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-28 09:07:58,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 09:07:58,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:58,065 INFO L422 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:58,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 09:07:58,066 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:58,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:58,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1795945971, now seen corresponding path program 13 times [2020-10-28 09:07:58,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:58,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1564129659] [2020-10-28 09:07:58,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:58,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:58,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:58,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:58,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:00,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:00,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 09:08:00,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:08:00,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2796 [2020-10-28 09:08:00,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:00,878 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:00,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 09:08:00,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 09:08:00,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 09:08:00,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:00,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:08:00,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:00,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:00,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:00,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:08:00,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:00,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:08:00,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:00,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:00,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:00,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:08:00,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:00,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:00,975 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-28 09:08:00,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1564129659] [2020-10-28 09:08:00,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:08:00,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 09:08:00,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809146267] [2020-10-28 09:08:00,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 09:08:00,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:08:00,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 09:08:00,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:08:00,978 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 9 states. [2020-10-28 09:08:01,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:08:01,168 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2020-10-28 09:08:01,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 09:08:01,169 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-10-28 09:08:01,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:08:01,170 INFO L225 Difference]: With dead ends: 67 [2020-10-28 09:08:01,170 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 09:08:01,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:08:01,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 09:08:01,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 37. [2020-10-28 09:08:01,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-28 09:08:01,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-28 09:08:01,177 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 32 [2020-10-28 09:08:01,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:08:01,178 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-28 09:08:01,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 09:08:01,178 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-28 09:08:01,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 09:08:01,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:08:01,179 INFO L422 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:08:01,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 09:08:01,180 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:08:01,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:08:01,180 INFO L82 PathProgramCache]: Analyzing trace with hash -612327294, now seen corresponding path program 14 times [2020-10-28 09:08:01,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:08:01,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761058922] [2020-10-28 09:08:01,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:08:01,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:01,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:01,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:01,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:04,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:04,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 09:08:04,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:08:04,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3020 [2020-10-28 09:08:04,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:04,218 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:04,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:08:04,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:08:04,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 09:08:04,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:04,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:08:04,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:04,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:04,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:04,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:08:04,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:04,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:08:04,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:04,436 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:04,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:04,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:08:04,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:04,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:04,442 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-28 09:08:04,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761058922] [2020-10-28 09:08:04,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:08:04,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:08:04,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603392725] [2020-10-28 09:08:04,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:08:04,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:08:04,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:08:04,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:08:04,449 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 14 states. [2020-10-28 09:08:04,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:08:04,653 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2020-10-28 09:08:04,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 09:08:04,654 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-10-28 09:08:04,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:08:04,655 INFO L225 Difference]: With dead ends: 73 [2020-10-28 09:08:04,655 INFO L226 Difference]: Without dead ends: 53 [2020-10-28 09:08:04,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:08:04,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-28 09:08:04,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2020-10-28 09:08:04,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 09:08:04,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-28 09:08:04,667 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 33 [2020-10-28 09:08:04,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:08:04,668 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-28 09:08:04,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:08:04,668 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-28 09:08:04,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 09:08:04,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:08:04,669 INFO L422 BasicCegarLoop]: trace histogram [11, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:08:04,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 09:08:04,669 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:08:04,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:08:04,670 INFO L82 PathProgramCache]: Analyzing trace with hash 816384820, now seen corresponding path program 15 times [2020-10-28 09:08:04,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:08:04,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844487271] [2020-10-28 09:08:04,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:08:04,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:04,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:04,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:04,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:08,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:08,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 09:08:08,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:08:08,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3372 [2020-10-28 09:08:08,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:08,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:08,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:08:08,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 09:08:08,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 09:08:08,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:08,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:08:08,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:08,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:08,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:08,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:08:08,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:08,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:08:08,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:08,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:08,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:08,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:08:08,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:08,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:08,156 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-28 09:08:08,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844487271] [2020-10-28 09:08:08,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:08:08,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:08:08,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818452833] [2020-10-28 09:08:08,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:08:08,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:08:08,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:08:08,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:08:08,161 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 10 states. [2020-10-28 09:08:08,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:08:08,382 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2020-10-28 09:08:08,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:08:08,383 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-10-28 09:08:08,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:08:08,384 INFO L225 Difference]: With dead ends: 72 [2020-10-28 09:08:08,384 INFO L226 Difference]: Without dead ends: 60 [2020-10-28 09:08:08,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:08:08,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-28 09:08:08,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 39. [2020-10-28 09:08:08,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-28 09:08:08,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-28 09:08:08,391 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 34 [2020-10-28 09:08:08,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:08:08,391 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-28 09:08:08,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:08:08,392 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-28 09:08:08,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 09:08:08,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:08:08,392 INFO L422 BasicCegarLoop]: trace histogram [11, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:08:08,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 09:08:08,393 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:08:08,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:08:08,393 INFO L82 PathProgramCache]: Analyzing trace with hash -913951903, now seen corresponding path program 16 times [2020-10-28 09:08:08,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:08:08,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183711923] [2020-10-28 09:08:08,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:08:08,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:08,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:08,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:08,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:11,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:11,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 09:08:11,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:08:11,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3376 [2020-10-28 09:08:11,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:11,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:11,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:08:11,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:08:11,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 09:08:11,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:12,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:08:12,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:12,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:12,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:12,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:08:12,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:12,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:08:12,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:12,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:12,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:12,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:08:12,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:12,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:12,245 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-28 09:08:12,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183711923] [2020-10-28 09:08:12,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:08:12,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:08:12,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280932152] [2020-10-28 09:08:12,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:08:12,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:08:12,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:08:12,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:08:12,248 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 16 states. [2020-10-28 09:08:12,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:08:12,612 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-10-28 09:08:12,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 09:08:12,613 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2020-10-28 09:08:12,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:08:12,613 INFO L225 Difference]: With dead ends: 50 [2020-10-28 09:08:12,614 INFO L226 Difference]: Without dead ends: 46 [2020-10-28 09:08:12,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:08:12,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-28 09:08:12,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-28 09:08:12,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-28 09:08:12,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-28 09:08:12,622 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 35 [2020-10-28 09:08:12,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:08:12,622 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-28 09:08:12,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:08:12,623 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-28 09:08:12,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 09:08:12,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:08:12,623 INFO L422 BasicCegarLoop]: trace histogram [11, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:08:12,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 09:08:12,624 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:08:12,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:08:12,624 INFO L82 PathProgramCache]: Analyzing trace with hash -574782445, now seen corresponding path program 1 times [2020-10-28 09:08:12,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:08:12,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142799986] [2020-10-28 09:08:12,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:08:12,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:12,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:12,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:13,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:17,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:17,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 09:08:17,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:08:17,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 09:08:17,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:17,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:17,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 09:08:17,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:08:17,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 09:08:17,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:17,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:08:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:17,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:17,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:17,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:08:17,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:17,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:08:17,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:17,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:17,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:17,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:08:17,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:17,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:17,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-28 09:08:17,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:17,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:17,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:17,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:08:17,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:17,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:08:17,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:17,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:17,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:17,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:08:17,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:17,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:17,875 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 66 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 09:08:17,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142799986] [2020-10-28 09:08:17,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:08:17,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 09:08:17,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257643459] [2020-10-28 09:08:17,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 09:08:17,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:08:17,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 09:08:17,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:08:17,879 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 15 states. [2020-10-28 09:08:18,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:08:18,168 INFO L93 Difference]: Finished difference Result 89 states and 98 transitions. [2020-10-28 09:08:18,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 09:08:18,169 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-10-28 09:08:18,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:08:18,170 INFO L225 Difference]: With dead ends: 89 [2020-10-28 09:08:18,170 INFO L226 Difference]: Without dead ends: 62 [2020-10-28 09:08:18,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:08:18,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-28 09:08:18,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2020-10-28 09:08:18,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-28 09:08:18,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-10-28 09:08:18,179 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 42 [2020-10-28 09:08:18,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:08:18,179 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-10-28 09:08:18,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 09:08:18,180 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-10-28 09:08:18,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 09:08:18,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:08:18,180 INFO L422 BasicCegarLoop]: trace histogram [12, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:08:18,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 09:08:18,181 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:08:18,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:08:18,181 INFO L82 PathProgramCache]: Analyzing trace with hash 427622817, now seen corresponding path program 2 times [2020-10-28 09:08:18,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:08:18,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358543195] [2020-10-28 09:08:18,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:08:18,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:18,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:18,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:18,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:23,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:23,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 09:08:23,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:08:23,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:08:23,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:23,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:23,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:08:23,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:08:23,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 09:08:23,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:23,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:08:23,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:23,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:23,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:23,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:08:23,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:23,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:08:23,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:23,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:23,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:23,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:08:23,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:23,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:23,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-28 09:08:23,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:23,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:23,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:23,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:08:23,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:23,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:08:23,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:23,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:23,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:23,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:08:23,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:23,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:23,433 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 2 proven. 78 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 09:08:23,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358543195] [2020-10-28 09:08:23,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:08:23,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:08:23,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052337864] [2020-10-28 09:08:23,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:08:23,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:08:23,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:08:23,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:08:23,435 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 16 states. [2020-10-28 09:08:23,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:08:23,745 INFO L93 Difference]: Finished difference Result 90 states and 99 transitions. [2020-10-28 09:08:23,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:08:23,745 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-10-28 09:08:23,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:08:23,746 INFO L225 Difference]: With dead ends: 90 [2020-10-28 09:08:23,746 INFO L226 Difference]: Without dead ends: 63 [2020-10-28 09:08:23,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:08:23,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-28 09:08:23,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 47. [2020-10-28 09:08:23,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-28 09:08:23,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-10-28 09:08:23,757 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 43 [2020-10-28 09:08:23,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:08:23,757 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-10-28 09:08:23,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:08:23,757 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-10-28 09:08:23,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 09:08:23,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:08:23,758 INFO L422 BasicCegarLoop]: trace histogram [13, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:08:23,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 09:08:23,758 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:08:23,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:08:23,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1437414867, now seen corresponding path program 3 times [2020-10-28 09:08:23,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:08:23,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105971021] [2020-10-28 09:08:23,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:08:23,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:23,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:23,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:24,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:28,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:28,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 09:08:28,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:08:28,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:08:28,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:28,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:28,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 09:08:28,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 09:08:28,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 09:08:28,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:28,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:08:28,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:28,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:28,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:28,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:08:28,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:28,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:08:28,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:28,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:28,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:28,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:08:28,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:28,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:28,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-28 09:08:28,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:28,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:28,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:28,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:08:28,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:28,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:08:28,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:28,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:28,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:28,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:08:28,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:28,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:28,923 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-10-28 09:08:28,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105971021] [2020-10-28 09:08:28,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:08:28,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 09:08:28,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570503929] [2020-10-28 09:08:28,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 09:08:28,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:08:28,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 09:08:28,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:08:28,928 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 11 states. [2020-10-28 09:08:29,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:08:29,175 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2020-10-28 09:08:29,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 09:08:29,175 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-10-28 09:08:29,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:08:29,176 INFO L225 Difference]: With dead ends: 88 [2020-10-28 09:08:29,176 INFO L226 Difference]: Without dead ends: 70 [2020-10-28 09:08:29,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:08:29,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-28 09:08:29,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 48. [2020-10-28 09:08:29,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 09:08:29,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-28 09:08:29,186 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 44 [2020-10-28 09:08:29,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:08:29,187 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-28 09:08:29,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 09:08:29,187 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-28 09:08:29,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 09:08:29,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:08:29,188 INFO L422 BasicCegarLoop]: trace histogram [13, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:08:29,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 09:08:29,188 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:08:29,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:08:29,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1862224512, now seen corresponding path program 4 times [2020-10-28 09:08:29,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:08:29,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016619113] [2020-10-28 09:08:29,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:08:29,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:29,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:29,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:29,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:34,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:34,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 09:08:34,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:08:34,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:08:34,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:34,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:34,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 09:08:34,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:08:34,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 09:08:34,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:34,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:08:34,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:34,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:34,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:34,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:08:34,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:34,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:08:34,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:34,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:34,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:34,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:08:34,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:34,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:34,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-28 09:08:34,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:34,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:34,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:34,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:08:34,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:34,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:08:34,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:34,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:34,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:08:34,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:08:34,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:08:34,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:34,631 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-10-28 09:08:34,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016619113] [2020-10-28 09:08:34,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:08:34,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 09:08:34,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438430141] [2020-10-28 09:08:34,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 09:08:34,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:08:34,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 09:08:34,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:08:34,633 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 18 states. [2020-10-28 09:08:35,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:08:35,299 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2020-10-28 09:08:35,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:08:35,301 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-10-28 09:08:35,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:08:35,302 INFO L225 Difference]: With dead ends: 72 [2020-10-28 09:08:35,302 INFO L226 Difference]: Without dead ends: 68 [2020-10-28 09:08:35,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:08:35,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-28 09:08:35,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 55. [2020-10-28 09:08:35,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-28 09:08:35,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-28 09:08:35,313 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 45 [2020-10-28 09:08:35,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:08:35,313 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-28 09:08:35,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 09:08:35,314 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-28 09:08:35,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 09:08:35,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:08:35,314 INFO L422 BasicCegarLoop]: trace histogram [13, 8, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:08:35,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 09:08:35,315 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:08:35,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:08:35,315 INFO L82 PathProgramCache]: Analyzing trace with hash -2045693676, now seen corresponding path program 5 times [2020-10-28 09:08:35,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:08:35,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961527258] [2020-10-28 09:08:35,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:08:35,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:35,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:35,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:37,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:40,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:40,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 09:08:40,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:08:40,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 09:08:40,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:40,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:40,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 09:08:40,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:08:40,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 09:08:40,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:40,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:08:40,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:40,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:40,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:40,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:08:40,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:40,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:08:40,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:40,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:40,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:40,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:08:40,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:40,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:40,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-28 09:08:40,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:40,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:40,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:40,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:08:40,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:40,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:08:40,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:40,598 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:40,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:40,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:08:40,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:40,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:40,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-28 09:08:40,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:40,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:40,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:40,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:08:40,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:40,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:08:40,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:40,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:40,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:40,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:08:40,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:40,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:08:40,611 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 4 proven. 91 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-10-28 09:08:40,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961527258] [2020-10-28 09:08:40,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:08:40,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 09:08:40,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419489962] [2020-10-28 09:08:40,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 09:08:40,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:08:40,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 09:08:40,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:08:40,627 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 17 states. [2020-10-28 09:08:40,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:08:40,927 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2020-10-28 09:08:40,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 09:08:40,928 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 52 [2020-10-28 09:08:40,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:08:40,929 INFO L225 Difference]: With dead ends: 107 [2020-10-28 09:08:40,929 INFO L226 Difference]: Without dead ends: 72 [2020-10-28 09:08:40,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:08:40,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-28 09:08:40,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56. [2020-10-28 09:08:40,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-28 09:08:40,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-10-28 09:08:40,951 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 52 [2020-10-28 09:08:40,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:08:40,951 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-10-28 09:08:40,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 09:08:40,951 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-10-28 09:08:40,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 09:08:40,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:08:40,952 INFO L422 BasicCegarLoop]: trace histogram [14, 8, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:08:40,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 09:08:40,953 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:08:40,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:08:40,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1590455006, now seen corresponding path program 6 times [2020-10-28 09:08:40,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:08:40,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600770523] [2020-10-28 09:08:40,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:08:40,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:40,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:41,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:43,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:45,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:45,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 09:08:45,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:08:45,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 09:08:45,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:45,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:45,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 09:08:45,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:08:45,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 09:08:45,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:46,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:08:46,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:46,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:46,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:46,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:08:46,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:46,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:08:46,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:46,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:46,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:46,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:08:46,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:46,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:46,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-28 09:08:46,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:46,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:46,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:46,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:08:46,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:46,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:08:46,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:46,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:46,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:46,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:08:46,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:46,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:46,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-28 09:08:46,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:46,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:46,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:46,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:08:46,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:46,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:08:46,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:46,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:46,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:46,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:08:46,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:46,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:46,256 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 4 proven. 105 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-10-28 09:08:46,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600770523] [2020-10-28 09:08:46,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:08:46,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 09:08:46,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750089859] [2020-10-28 09:08:46,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 09:08:46,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:08:46,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 09:08:46,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:08:46,262 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 18 states. [2020-10-28 09:08:46,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:08:46,551 INFO L93 Difference]: Finished difference Result 108 states and 117 transitions. [2020-10-28 09:08:46,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 09:08:46,552 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 53 [2020-10-28 09:08:46,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:08:46,553 INFO L225 Difference]: With dead ends: 108 [2020-10-28 09:08:46,553 INFO L226 Difference]: Without dead ends: 73 [2020-10-28 09:08:46,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:08:46,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-28 09:08:46,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 57. [2020-10-28 09:08:46,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-28 09:08:46,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-10-28 09:08:46,575 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 53 [2020-10-28 09:08:46,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:08:46,575 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-10-28 09:08:46,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 09:08:46,575 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-10-28 09:08:46,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 09:08:46,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:08:46,576 INFO L422 BasicCegarLoop]: trace histogram [15, 8, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:08:46,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 09:08:46,578 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:08:46,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:08:46,578 INFO L82 PathProgramCache]: Analyzing trace with hash -362958124, now seen corresponding path program 7 times [2020-10-28 09:08:46,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:08:46,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744888055] [2020-10-28 09:08:46,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:08:46,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:46,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:46,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:49,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:51,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:51,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 09:08:51,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:08:51,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 09:08:51,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:51,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:51,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:08:51,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-28 09:08:51,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 09:08:51,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:51,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:08:51,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:51,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:51,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:51,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:08:51,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:51,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:08:51,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:51,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:51,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:51,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:08:51,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:51,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:51,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-28 09:08:51,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:51,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:51,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:51,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:08:51,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:51,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:08:51,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:51,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:51,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:51,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:08:51,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:51,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:51,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-28 09:08:51,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:51,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:51,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:51,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:08:51,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:51,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:08:51,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:51,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:51,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:51,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:08:51,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:51,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:51,755 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2020-10-28 09:08:51,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744888055] [2020-10-28 09:08:51,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:08:51,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:08:51,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758161002] [2020-10-28 09:08:51,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:08:51,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:08:51,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:08:51,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:08:51,757 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 12 states. [2020-10-28 09:08:52,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:08:52,009 INFO L93 Difference]: Finished difference Result 105 states and 115 transitions. [2020-10-28 09:08:52,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 09:08:52,009 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 54 [2020-10-28 09:08:52,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:08:52,010 INFO L225 Difference]: With dead ends: 105 [2020-10-28 09:08:52,010 INFO L226 Difference]: Without dead ends: 80 [2020-10-28 09:08:52,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:08:52,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-28 09:08:52,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 58. [2020-10-28 09:08:52,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-28 09:08:52,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-28 09:08:52,025 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 54 [2020-10-28 09:08:52,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:08:52,025 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-28 09:08:52,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:08:52,026 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-28 09:08:52,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 09:08:52,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:08:52,026 INFO L422 BasicCegarLoop]: trace histogram [15, 9, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:08:52,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 09:08:52,027 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:08:52,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:08:52,027 INFO L82 PathProgramCache]: Analyzing trace with hash 150497793, now seen corresponding path program 8 times [2020-10-28 09:08:52,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:08:52,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308474445] [2020-10-28 09:08:52,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:08:52,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:52,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:52,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:54,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:57,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:57,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 09:08:57,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:08:57,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 09:08:57,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:57,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:57,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 09:08:57,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:08:57,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 09:08:57,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:57,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:08:57,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:57,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:57,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:57,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:08:57,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:57,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:08:57,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:57,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:57,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:57,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:08:57,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:57,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:57,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-28 09:08:57,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:57,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:57,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:57,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:08:57,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:57,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:08:57,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:57,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:57,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:57,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:08:57,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:57,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:57,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-28 09:08:57,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:57,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:57,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:57,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:08:57,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:57,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:08:57,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:57,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:57,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:57,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:08:57,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:57,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:57,340 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 4 proven. 120 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-28 09:08:57,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308474445] [2020-10-28 09:08:57,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:08:57,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 09:08:57,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366494990] [2020-10-28 09:08:57,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 09:08:57,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:08:57,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 09:08:57,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:08:57,342 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 19 states. [2020-10-28 09:08:57,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:08:57,610 INFO L93 Difference]: Finished difference Result 114 states and 124 transitions. [2020-10-28 09:08:57,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 09:08:57,611 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2020-10-28 09:08:57,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:08:57,612 INFO L225 Difference]: With dead ends: 114 [2020-10-28 09:08:57,612 INFO L226 Difference]: Without dead ends: 78 [2020-10-28 09:08:57,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:08:57,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-28 09:08:57,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 59. [2020-10-28 09:08:57,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-28 09:08:57,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-10-28 09:08:57,625 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 55 [2020-10-28 09:08:57,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:08:57,626 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-10-28 09:08:57,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 09:08:57,626 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-10-28 09:08:57,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 09:08:57,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:08:57,627 INFO L422 BasicCegarLoop]: trace histogram [16, 9, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:08:57,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 09:08:57,627 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:08:57,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:08:57,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1341005005, now seen corresponding path program 9 times [2020-10-28 09:08:57,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:08:57,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511973788] [2020-10-28 09:08:57,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:08:57,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:57,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:57,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:00,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:02,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:02,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 09:09:02,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:09:02,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 09:09:02,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:02,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:02,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:09:02,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 09:09:02,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 09:09:02,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:02,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:09:02,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:02,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:02,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:02,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:09:02,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:02,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:09:02,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:02,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:02,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:02,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:09:02,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:02,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:02,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-28 09:09:02,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:02,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:02,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:02,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:09:02,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:02,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:09:02,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:02,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:02,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:02,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:09:02,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:02,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:02,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-28 09:09:02,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:02,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:02,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:02,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:09:02,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:02,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:09:02,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:02,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:02,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:02,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:09:02,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:02,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:02,798 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 4 proven. 45 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-28 09:09:02,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511973788] [2020-10-28 09:09:02,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:09:02,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 09:09:02,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511677347] [2020-10-28 09:09:02,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 09:09:02,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:09:02,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 09:09:02,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:09:02,801 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 13 states. [2020-10-28 09:09:03,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:09:03,118 INFO L93 Difference]: Finished difference Result 110 states and 121 transitions. [2020-10-28 09:09:03,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 09:09:03,119 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2020-10-28 09:09:03,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:09:03,120 INFO L225 Difference]: With dead ends: 110 [2020-10-28 09:09:03,120 INFO L226 Difference]: Without dead ends: 85 [2020-10-28 09:09:03,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:09:03,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-28 09:09:03,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 60. [2020-10-28 09:09:03,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 09:09:03,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-10-28 09:09:03,134 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 56 [2020-10-28 09:09:03,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:09:03,135 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-10-28 09:09:03,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 09:09:03,135 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-10-28 09:09:03,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 09:09:03,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:09:03,136 INFO L422 BasicCegarLoop]: trace histogram [16, 10, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:09:03,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 09:09:03,136 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:09:03,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:09:03,136 INFO L82 PathProgramCache]: Analyzing trace with hash -104184446, now seen corresponding path program 10 times [2020-10-28 09:09:03,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:09:03,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973524632] [2020-10-28 09:09:03,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:09:03,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:03,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:03,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:06,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:08,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:08,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 09:09:08,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:09:08,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 09:09:08,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:08,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:08,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 09:09:08,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:09:08,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-28 09:09:08,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:08,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:09:08,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:08,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:08,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:08,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:09:08,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:08,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:09:08,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:08,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:08,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:08,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:09:08,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:08,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:08,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-28 09:09:08,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:08,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:08,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:08,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:09:08,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:08,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:09:08,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:08,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:08,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:09:08,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:09:08,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:09:08,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:08,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-28 09:09:08,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:08,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:08,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:08,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:09:08,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:08,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:09:08,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:08,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:08,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:09:08,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:09:08,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:09:08,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:08,708 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 19 proven. 47 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-10-28 09:09:08,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973524632] [2020-10-28 09:09:08,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:09:08,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 09:09:08,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902090785] [2020-10-28 09:09:08,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 09:09:08,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:09:08,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 09:09:08,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:09:08,709 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 21 states. [2020-10-28 09:09:09,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:09:09,593 INFO L93 Difference]: Finished difference Result 87 states and 94 transitions. [2020-10-28 09:09:09,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:09:09,594 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 57 [2020-10-28 09:09:09,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:09:09,595 INFO L225 Difference]: With dead ends: 87 [2020-10-28 09:09:09,596 INFO L226 Difference]: Without dead ends: 83 [2020-10-28 09:09:09,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:09:09,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-28 09:09:09,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2020-10-28 09:09:09,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 09:09:09,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-10-28 09:09:09,610 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 57 [2020-10-28 09:09:09,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:09:09,611 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-10-28 09:09:09,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 09:09:09,611 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-10-28 09:09:09,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 09:09:09,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:09:09,612 INFO L422 BasicCegarLoop]: trace histogram [16, 10, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:09:09,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 09:09:09,612 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:09:09,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:09:09,613 INFO L82 PathProgramCache]: Analyzing trace with hash -769131822, now seen corresponding path program 11 times [2020-10-28 09:09:09,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:09:09,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057587207] [2020-10-28 09:09:09,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:09:09,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:09,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:09,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:13,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:14,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:14,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 09:09:14,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:09:14,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 09:09:14,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:14,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:14,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 09:09:14,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:09:14,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 09:09:14,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:14,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:09:14,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:14,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:14,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:14,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:09:14,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:14,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:09:14,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:14,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:14,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:14,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:09:14,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:14,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:14,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-28 09:09:14,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:14,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:14,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:14,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:09:14,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:14,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:09:14,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:14,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:14,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:14,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:09:14,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:14,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:14,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-28 09:09:14,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:14,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:14,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:14,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:09:14,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:14,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:09:14,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:14,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:14,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:14,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:09:14,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:14,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:14,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-28 09:09:14,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:14,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:14,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:14,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:09:14,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:14,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:09:14,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:14,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:14,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:14,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:09:14,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:14,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:14,971 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 6 proven. 136 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-10-28 09:09:14,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057587207] [2020-10-28 09:09:14,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:09:14,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 09:09:14,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847519512] [2020-10-28 09:09:14,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 09:09:14,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:09:14,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 09:09:14,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:09:14,973 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 20 states. [2020-10-28 09:09:15,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:09:15,281 INFO L93 Difference]: Finished difference Result 128 states and 137 transitions. [2020-10-28 09:09:15,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:09:15,281 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 64 [2020-10-28 09:09:15,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:09:15,282 INFO L225 Difference]: With dead ends: 128 [2020-10-28 09:09:15,283 INFO L226 Difference]: Without dead ends: 84 [2020-10-28 09:09:15,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:09:15,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-28 09:09:15,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 68. [2020-10-28 09:09:15,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-28 09:09:15,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-10-28 09:09:15,299 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 64 [2020-10-28 09:09:15,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:09:15,299 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-10-28 09:09:15,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 09:09:15,300 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-10-28 09:09:15,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 09:09:15,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:09:15,300 INFO L422 BasicCegarLoop]: trace histogram [17, 10, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:09:15,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 09:09:15,301 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:09:15,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:09:15,301 INFO L82 PathProgramCache]: Analyzing trace with hash -2080458272, now seen corresponding path program 12 times [2020-10-28 09:09:15,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:09:15,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51697185] [2020-10-28 09:09:15,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:09:15,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:15,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:15,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:19,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:20,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:20,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 09:09:20,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:09:20,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 09:09:20,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:20,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:20,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 09:09:20,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:09:20,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 09:09:20,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:20,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:09:20,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:20,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:20,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:20,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:09:20,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:20,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:09:20,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:20,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:20,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:20,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:09:20,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:20,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:20,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-28 09:09:20,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:20,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:20,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:20,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:09:20,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:20,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:09:20,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:20,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:20,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:20,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:09:20,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:20,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:20,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-28 09:09:20,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:20,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:20,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:20,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:09:20,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:20,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:09:20,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:20,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:20,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:20,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:09:20,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:20,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:20,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-28 09:09:20,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:20,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:20,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:20,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:09:20,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:20,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:09:20,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:20,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:20,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:20,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:09:20,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:20,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:20,652 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 6 proven. 153 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-10-28 09:09:20,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51697185] [2020-10-28 09:09:20,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:09:20,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 09:09:20,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745794261] [2020-10-28 09:09:20,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 09:09:20,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:09:20,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 09:09:20,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:09:20,655 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 21 states. [2020-10-28 09:09:21,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:09:21,017 INFO L93 Difference]: Finished difference Result 132 states and 142 transitions. [2020-10-28 09:09:21,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 09:09:21,018 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 65 [2020-10-28 09:09:21,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:09:21,019 INFO L225 Difference]: With dead ends: 132 [2020-10-28 09:09:21,019 INFO L226 Difference]: Without dead ends: 88 [2020-10-28 09:09:21,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:09:21,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-28 09:09:21,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2020-10-28 09:09:21,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-28 09:09:21,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-10-28 09:09:21,030 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 65 [2020-10-28 09:09:21,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:09:21,031 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-10-28 09:09:21,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 09:09:21,031 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-10-28 09:09:21,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 09:09:21,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:09:21,032 INFO L422 BasicCegarLoop]: trace histogram [18, 10, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:09:21,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 09:09:21,032 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:09:21,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:09:21,032 INFO L82 PathProgramCache]: Analyzing trace with hash 218094738, now seen corresponding path program 13 times [2020-10-28 09:09:21,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:09:21,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83550265] [2020-10-28 09:09:21,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:09:21,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:21,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:21,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:26,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:26,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 09:09:26,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:09:26,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 09:09:26,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:26,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:26,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:09:26,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 09:09:26,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 09:09:26,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:26,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:09:26,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:26,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:26,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:26,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:09:26,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:26,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:09:26,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:26,230 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:26,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:26,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:09:26,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:26,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:26,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-28 09:09:26,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:26,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:26,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:26,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:09:26,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:26,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:09:26,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:26,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:26,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:26,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:09:26,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:26,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:26,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-28 09:09:26,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:26,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:26,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:26,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:09:26,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:26,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:09:26,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:26,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:26,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:26,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:09:26,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:26,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:26,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-28 09:09:26,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:26,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:26,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:26,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:09:26,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:26,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:09:26,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:26,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:26,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:26,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:09:26,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:26,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:26,245 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2020-10-28 09:09:26,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83550265] [2020-10-28 09:09:26,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:09:26,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:09:26,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004326641] [2020-10-28 09:09:26,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:09:26,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:09:26,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:09:26,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:09:26,246 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 14 states. [2020-10-28 09:09:26,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:09:26,566 INFO L93 Difference]: Finished difference Result 127 states and 138 transitions. [2020-10-28 09:09:26,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 09:09:26,566 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 66 [2020-10-28 09:09:26,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:09:26,567 INFO L225 Difference]: With dead ends: 127 [2020-10-28 09:09:26,567 INFO L226 Difference]: Without dead ends: 95 [2020-10-28 09:09:26,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:09:26,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-28 09:09:26,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 70. [2020-10-28 09:09:26,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-28 09:09:26,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-10-28 09:09:26,579 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 66 [2020-10-28 09:09:26,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:09:26,579 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-10-28 09:09:26,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:09:26,579 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-10-28 09:09:26,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 09:09:26,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:09:26,580 INFO L422 BasicCegarLoop]: trace histogram [18, 11, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:09:26,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 09:09:26,581 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:09:26,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:09:26,581 INFO L82 PathProgramCache]: Analyzing trace with hash -140446623, now seen corresponding path program 14 times [2020-10-28 09:09:26,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:09:26,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336063376] [2020-10-28 09:09:26,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:09:26,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:26,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:26,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:31,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:31,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 09:09:31,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:09:31,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 09:09:31,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:31,608 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:31,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 09:09:31,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:09:31,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 09:09:31,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:31,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:09:31,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:31,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:31,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:31,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:09:31,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:31,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:09:31,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:31,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:31,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:31,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:09:31,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:31,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:31,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-28 09:09:31,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:31,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:31,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:31,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:09:31,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:31,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:09:31,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:31,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:31,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:31,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:09:31,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:31,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:31,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-28 09:09:31,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:31,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:31,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:31,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:09:31,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:31,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:09:31,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:31,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:31,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:31,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:09:31,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:31,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:31,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-28 09:09:31,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:31,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:31,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:31,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:09:31,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:31,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:09:31,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:31,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:31,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:31,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:09:31,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:31,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:31,948 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 6 proven. 171 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-10-28 09:09:31,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336063376] [2020-10-28 09:09:31,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:09:31,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 09:09:31,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559610970] [2020-10-28 09:09:31,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 09:09:31,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:09:31,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 09:09:31,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:09:31,950 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 22 states. [2020-10-28 09:09:32,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:09:32,271 INFO L93 Difference]: Finished difference Result 135 states and 145 transitions. [2020-10-28 09:09:32,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 09:09:32,272 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2020-10-28 09:09:32,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:09:32,273 INFO L225 Difference]: With dead ends: 135 [2020-10-28 09:09:32,273 INFO L226 Difference]: Without dead ends: 90 [2020-10-28 09:09:32,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:09:32,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-28 09:09:32,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 71. [2020-10-28 09:09:32,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-28 09:09:32,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-28 09:09:32,284 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 67 [2020-10-28 09:09:32,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:09:32,285 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-28 09:09:32,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 09:09:32,285 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-28 09:09:32,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 09:09:32,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:09:32,286 INFO L422 BasicCegarLoop]: trace histogram [19, 11, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:09:32,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 09:09:32,286 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:09:32,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:09:32,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1155805843, now seen corresponding path program 15 times [2020-10-28 09:09:32,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:09:32,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282998458] [2020-10-28 09:09:32,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:09:32,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:32,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:32,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:37,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:37,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 09:09:37,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:09:37,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:09:37,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:37,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:37,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 09:09:37,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 09:09:37,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 09:09:37,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:37,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:09:37,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:37,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:37,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:37,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:09:37,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:37,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:09:37,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:37,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:37,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:37,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:09:37,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:37,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:37,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-28 09:09:37,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:37,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:37,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:37,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:09:37,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:37,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:09:37,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:37,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:37,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:37,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:09:37,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:37,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:37,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-28 09:09:37,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:37,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:37,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:37,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:09:37,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:37,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:09:37,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:37,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:37,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:37,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:09:37,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:37,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:37,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-28 09:09:37,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:37,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:37,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:37,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:09:37,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:37,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:09:37,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:37,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:37,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:37,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:09:37,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:37,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:37,503 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2020-10-28 09:09:37,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282998458] [2020-10-28 09:09:37,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:09:37,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 09:09:37,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329446744] [2020-10-28 09:09:37,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 09:09:37,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:09:37,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 09:09:37,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:09:37,505 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 15 states. [2020-10-28 09:09:37,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:09:37,859 INFO L93 Difference]: Finished difference Result 132 states and 144 transitions. [2020-10-28 09:09:37,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 09:09:37,860 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 68 [2020-10-28 09:09:37,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:09:37,861 INFO L225 Difference]: With dead ends: 132 [2020-10-28 09:09:37,861 INFO L226 Difference]: Without dead ends: 100 [2020-10-28 09:09:37,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:09:37,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-28 09:09:37,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 72. [2020-10-28 09:09:37,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-28 09:09:37,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-10-28 09:09:37,873 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 68 [2020-10-28 09:09:37,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:09:37,874 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-10-28 09:09:37,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 09:09:37,874 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-10-28 09:09:37,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 09:09:37,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:09:37,875 INFO L422 BasicCegarLoop]: trace histogram [19, 12, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:09:37,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 09:09:37,875 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:09:37,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:09:37,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1136173440, now seen corresponding path program 16 times [2020-10-28 09:09:37,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:09:37,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111456179] [2020-10-28 09:09:37,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:09:37,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:37,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:37,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:42,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:42,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 09:09:42,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:09:42,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-28 09:09:42,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:42,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:42,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 09:09:42,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:09:42,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 09:09:42,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:43,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:09:43,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:43,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:43,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:43,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:09:43,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:43,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:09:43,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:43,297 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:43,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:43,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:09:43,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:43,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:43,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-28 09:09:43,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:43,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:43,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:43,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:09:43,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:43,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:09:43,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:43,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:43,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:43,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:09:43,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:43,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:43,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-28 09:09:43,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:43,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:43,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:43,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:09:43,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:43,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:09:43,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:43,303 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:43,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:43,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:09:43,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:43,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:43,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-28 09:09:43,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:43,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:43,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:43,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:09:43,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:43,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:09:43,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:43,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:43,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:43,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:09:43,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:43,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:43,311 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 6 proven. 190 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-28 09:09:43,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2111456179] [2020-10-28 09:09:43,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:09:43,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 09:09:43,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376967282] [2020-10-28 09:09:43,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 09:09:43,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:09:43,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 09:09:43,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:09:43,313 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 23 states. [2020-10-28 09:09:43,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:09:43,757 INFO L93 Difference]: Finished difference Result 141 states and 152 transitions. [2020-10-28 09:09:43,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 09:09:43,758 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 69 [2020-10-28 09:09:43,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:09:43,759 INFO L225 Difference]: With dead ends: 141 [2020-10-28 09:09:43,759 INFO L226 Difference]: Without dead ends: 95 [2020-10-28 09:09:43,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:09:43,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-28 09:09:43,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 73. [2020-10-28 09:09:43,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-28 09:09:43,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-10-28 09:09:43,771 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 69 [2020-10-28 09:09:43,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:09:43,771 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-10-28 09:09:43,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 09:09:43,772 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-10-28 09:09:43,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 09:09:43,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:09:43,772 INFO L422 BasicCegarLoop]: trace histogram [20, 12, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:09:43,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 09:09:43,773 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:09:43,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:09:43,773 INFO L82 PathProgramCache]: Analyzing trace with hash -978069454, now seen corresponding path program 17 times [2020-10-28 09:09:43,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:09:43,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277005687] [2020-10-28 09:09:43,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:09:43,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:43,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:43,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:48,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:48,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 09:09:48,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:09:48,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 09:09:48,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:48,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:48,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 09:09:48,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:09:48,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 09:09:48,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:49,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:09:49,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:49,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:49,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:49,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:09:49,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:49,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:09:49,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:49,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:49,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:49,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:09:49,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:49,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:49,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-28 09:09:49,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:49,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:49,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:49,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:09:49,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:49,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:09:49,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:49,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:49,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:49,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:09:49,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:49,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:49,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-28 09:09:49,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:49,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:49,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:49,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:09:49,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:49,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:09:49,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:49,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:49,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:49,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:09:49,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:49,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:49,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-28 09:09:49,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:49,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:49,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:49,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:09:49,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:49,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:09:49,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:49,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:49,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:49,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:09:49,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:49,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:49,191 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 6 proven. 210 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-28 09:09:49,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277005687] [2020-10-28 09:09:49,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:09:49,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 09:09:49,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367797613] [2020-10-28 09:09:49,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 09:09:49,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:09:49,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 09:09:49,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:09:49,193 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 24 states. [2020-10-28 09:09:49,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:09:49,524 INFO L93 Difference]: Finished difference Result 142 states and 153 transitions. [2020-10-28 09:09:49,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 09:09:49,525 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 70 [2020-10-28 09:09:49,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:09:49,526 INFO L225 Difference]: With dead ends: 142 [2020-10-28 09:09:49,526 INFO L226 Difference]: Without dead ends: 96 [2020-10-28 09:09:49,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:09:49,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-28 09:09:49,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-10-28 09:09:49,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-28 09:09:49,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-10-28 09:09:49,539 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 70 [2020-10-28 09:09:49,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:09:49,539 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-10-28 09:09:49,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 09:09:49,539 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-10-28 09:09:49,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 09:09:49,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:09:49,540 INFO L422 BasicCegarLoop]: trace histogram [21, 12, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:09:49,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 09:09:49,540 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:09:49,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:09:49,541 INFO L82 PathProgramCache]: Analyzing trace with hash -371813184, now seen corresponding path program 18 times [2020-10-28 09:09:49,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:09:49,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181362343] [2020-10-28 09:09:49,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:09:49,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:49,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:49,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:54,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:54,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 09:09:54,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:09:54,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 09:09:54,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:54,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:54,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:09:54,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-28 09:09:54,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 09:09:54,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:54,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:09:54,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:54,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:54,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:54,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:09:54,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:54,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:09:54,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:54,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:54,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:54,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:09:54,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:54,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:54,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-28 09:09:54,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:54,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:54,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:54,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:09:54,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:54,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:09:54,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:54,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:54,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:54,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:09:54,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:54,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:54,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-28 09:09:54,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:54,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:54,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:54,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:09:54,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:54,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:09:54,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:54,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:54,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:54,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:09:54,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:54,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:54,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-28 09:09:54,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:54,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:54,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:54,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:09:54,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:54,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:09:54,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:54,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:54,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:54,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:09:54,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:54,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:54,819 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 6 proven. 78 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2020-10-28 09:09:54,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181362343] [2020-10-28 09:09:54,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:09:54,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:09:54,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840473205] [2020-10-28 09:09:54,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:09:54,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:09:54,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:09:54,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:09:54,821 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 16 states. [2020-10-28 09:09:55,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:09:55,228 INFO L93 Difference]: Finished difference Result 138 states and 151 transitions. [2020-10-28 09:09:55,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:09:55,229 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 71 [2020-10-28 09:09:55,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:09:55,230 INFO L225 Difference]: With dead ends: 138 [2020-10-28 09:09:55,230 INFO L226 Difference]: Without dead ends: 106 [2020-10-28 09:09:55,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:09:55,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-28 09:09:55,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 75. [2020-10-28 09:09:55,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-28 09:09:55,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-10-28 09:09:55,245 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 71 [2020-10-28 09:09:55,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:09:55,246 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-10-28 09:09:55,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:09:55,246 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-10-28 09:09:55,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 09:09:55,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:09:55,247 INFO L422 BasicCegarLoop]: trace histogram [21, 13, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:09:55,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 09:09:55,247 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:09:55,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:09:55,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1247723021, now seen corresponding path program 19 times [2020-10-28 09:09:55,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:09:55,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156125024] [2020-10-28 09:09:55,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:09:55,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:55,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:55,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:00,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:00,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 09:10:00,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:10:00,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 09:10:00,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:00,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:00,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 09:10:00,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:10:00,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 09:10:00,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:00,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:00,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:00,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:00,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:00,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:00,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:00,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:10:00,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:00,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:00,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:00,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:00,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:00,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:00,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-28 09:10:00,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:00,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:00,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:00,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:10:00,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:00,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:10:00,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:00,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:00,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:00,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:10:00,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:00,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:00,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-28 09:10:00,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:00,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:00,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:00,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:10:00,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:00,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:10:00,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:00,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:00,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:00,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:10:00,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:00,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:00,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-28 09:10:00,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:00,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:00,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:00,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:10:00,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:00,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:10:00,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:00,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:00,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:00,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:10:00,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:00,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:00,750 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 6 proven. 231 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2020-10-28 09:10:00,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156125024] [2020-10-28 09:10:00,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:00,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 09:10:00,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759786157] [2020-10-28 09:10:00,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 09:10:00,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:00,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 09:10:00,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:10:00,752 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 25 states. [2020-10-28 09:10:01,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:01,241 INFO L93 Difference]: Finished difference Result 148 states and 160 transitions. [2020-10-28 09:10:01,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 09:10:01,242 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 72 [2020-10-28 09:10:01,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:01,243 INFO L225 Difference]: With dead ends: 148 [2020-10-28 09:10:01,243 INFO L226 Difference]: Without dead ends: 101 [2020-10-28 09:10:01,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:10:01,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-28 09:10:01,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 76. [2020-10-28 09:10:01,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-28 09:10:01,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-10-28 09:10:01,257 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 72 [2020-10-28 09:10:01,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:01,257 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-10-28 09:10:01,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 09:10:01,257 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-10-28 09:10:01,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 09:10:01,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:01,258 INFO L422 BasicCegarLoop]: trace histogram [22, 13, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:01,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 09:10:01,259 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:01,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:01,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1543967489, now seen corresponding path program 20 times [2020-10-28 09:10:01,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:01,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333198416] [2020-10-28 09:10:01,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:01,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:01,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:01,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:06,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:06,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 09:10:06,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:10:06,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 09:10:06,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:06,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:06,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 09:10:06,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:10:06,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 09:10:06,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:06,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:06,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:06,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:06,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:06,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:06,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:06,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:10:06,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:06,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:06,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:06,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:06,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:06,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:06,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-28 09:10:06,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:06,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:06,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:06,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:10:06,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:06,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:10:06,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:06,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:06,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:06,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:10:06,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:06,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:06,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-28 09:10:06,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:06,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:06,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:06,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:10:06,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:06,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:10:06,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:06,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:06,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:06,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:10:06,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:06,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:06,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-28 09:10:06,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:06,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:06,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:06,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:10:06,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:06,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:10:06,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:06,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:06,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:06,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:10:06,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:06,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:06,791 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 6 proven. 253 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2020-10-28 09:10:06,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1333198416] [2020-10-28 09:10:06,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:06,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 09:10:06,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988701829] [2020-10-28 09:10:06,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 09:10:06,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:06,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 09:10:06,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:10:06,793 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 26 states. [2020-10-28 09:10:07,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:07,305 INFO L93 Difference]: Finished difference Result 149 states and 161 transitions. [2020-10-28 09:10:07,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 09:10:07,306 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 73 [2020-10-28 09:10:07,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:07,307 INFO L225 Difference]: With dead ends: 149 [2020-10-28 09:10:07,307 INFO L226 Difference]: Without dead ends: 102 [2020-10-28 09:10:07,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:10:07,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-28 09:10:07,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 77. [2020-10-28 09:10:07,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-28 09:10:07,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2020-10-28 09:10:07,320 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 73 [2020-10-28 09:10:07,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:07,320 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2020-10-28 09:10:07,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 09:10:07,320 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2020-10-28 09:10:07,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 09:10:07,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:07,321 INFO L422 BasicCegarLoop]: trace histogram [23, 13, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:07,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 09:10:07,322 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:07,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:07,322 INFO L82 PathProgramCache]: Analyzing trace with hash -2107939917, now seen corresponding path program 21 times [2020-10-28 09:10:07,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:07,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949341860] [2020-10-28 09:10:07,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:07,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:07,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:07,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:12,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:12,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 09:10:12,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:10:12,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:10:12,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:12,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:12,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 09:10:12,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 09:10:12,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 09:10:12,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:12,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:12,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:12,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:12,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:12,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:12,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:12,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:10:12,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:12,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:12,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:12,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:12,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:12,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:12,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-28 09:10:12,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:12,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:12,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:12,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:10:12,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:12,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:10:12,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:12,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:12,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:12,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:10:12,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:12,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:12,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-28 09:10:12,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:12,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:12,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:12,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:10:12,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:12,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:10:12,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:12,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:12,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:12,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:10:12,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:12,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:12,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-28 09:10:12,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:12,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:12,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:12,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:10:12,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:12,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:10:12,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:12,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:12,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:12,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:10:12,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:12,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:12,593 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 6 proven. 91 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2020-10-28 09:10:12,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949341860] [2020-10-28 09:10:12,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:12,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 09:10:12,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613827867] [2020-10-28 09:10:12,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 09:10:12,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:12,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 09:10:12,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:10:12,595 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 17 states. [2020-10-28 09:10:13,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:13,000 INFO L93 Difference]: Finished difference Result 144 states and 158 transitions. [2020-10-28 09:10:13,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 09:10:13,001 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 74 [2020-10-28 09:10:13,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:13,002 INFO L225 Difference]: With dead ends: 144 [2020-10-28 09:10:13,003 INFO L226 Difference]: Without dead ends: 112 [2020-10-28 09:10:13,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:10:13,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-28 09:10:13,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 78. [2020-10-28 09:10:13,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-28 09:10:13,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-10-28 09:10:13,014 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 74 [2020-10-28 09:10:13,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:13,014 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-10-28 09:10:13,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 09:10:13,014 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-10-28 09:10:13,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 09:10:13,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:13,015 INFO L422 BasicCegarLoop]: trace histogram [23, 14, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:13,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 09:10:13,016 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:13,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:13,016 INFO L82 PathProgramCache]: Analyzing trace with hash 766923104, now seen corresponding path program 22 times [2020-10-28 09:10:13,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:13,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683495859] [2020-10-28 09:10:13,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:13,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:13,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:13,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:18,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:18,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 09:10:18,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:10:18,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 09:10:18,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:18,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:18,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 09:10:18,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:10:18,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 09:10:18,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:18,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:18,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:18,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:18,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:18,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:18,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:18,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:10:18,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:18,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:18,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:18,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:18,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:18,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:18,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-28 09:10:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:18,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:18,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:18,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:10:18,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:18,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:10:18,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:18,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:18,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:18,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:10:18,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:18,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:18,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-28 09:10:18,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:18,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:18,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:18,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:10:18,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:18,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:10:18,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:18,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:18,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:18,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:10:18,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:18,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:18,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-28 09:10:18,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:18,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:18,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:18,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:10:18,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:18,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:10:18,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:18,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:18,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:18,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:10:18,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:18,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:18,601 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 6 proven. 276 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-10-28 09:10:18,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683495859] [2020-10-28 09:10:18,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:18,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 09:10:18,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274058147] [2020-10-28 09:10:18,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 09:10:18,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:18,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 09:10:18,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:10:18,603 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 27 states. [2020-10-28 09:10:19,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:19,150 INFO L93 Difference]: Finished difference Result 155 states and 168 transitions. [2020-10-28 09:10:19,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 09:10:19,151 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 75 [2020-10-28 09:10:19,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:19,152 INFO L225 Difference]: With dead ends: 155 [2020-10-28 09:10:19,152 INFO L226 Difference]: Without dead ends: 107 [2020-10-28 09:10:19,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:10:19,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-28 09:10:19,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 79. [2020-10-28 09:10:19,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-28 09:10:19,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2020-10-28 09:10:19,163 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 75 [2020-10-28 09:10:19,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:19,164 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2020-10-28 09:10:19,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 09:10:19,164 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2020-10-28 09:10:19,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-28 09:10:19,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:19,165 INFO L422 BasicCegarLoop]: trace histogram [24, 14, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:19,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 09:10:19,165 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:19,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:19,166 INFO L82 PathProgramCache]: Analyzing trace with hash 272186770, now seen corresponding path program 23 times [2020-10-28 09:10:19,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:19,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460542785] [2020-10-28 09:10:19,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:19,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:19,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:19,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:24,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:24,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 09:10:24,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:10:24,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 09:10:24,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:24,204 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:24,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 09:10:24,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 09:10:24,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 09:10:24,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:24,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:24,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:24,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:24,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:24,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:24,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:24,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:10:24,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:24,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:24,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:24,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:24,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:24,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:24,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-28 09:10:24,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:24,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:24,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:24,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:10:24,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:24,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:10:24,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:24,464 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:24,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:24,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:10:24,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:24,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:24,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-28 09:10:24,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:24,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:24,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:24,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:10:24,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:24,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:10:24,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:24,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:24,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:24,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:10:24,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:24,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:24,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-28 09:10:24,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:24,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:24,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:24,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:10:24,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:24,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:10:24,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:24,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:24,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:24,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:10:24,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:24,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:24,480 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 6 proven. 105 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2020-10-28 09:10:24,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460542785] [2020-10-28 09:10:24,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:24,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 09:10:24,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586784567] [2020-10-28 09:10:24,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 09:10:24,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:24,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 09:10:24,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:10:24,482 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 18 states. [2020-10-28 09:10:24,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:24,886 INFO L93 Difference]: Finished difference Result 149 states and 164 transitions. [2020-10-28 09:10:24,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 09:10:24,887 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 76 [2020-10-28 09:10:24,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:24,888 INFO L225 Difference]: With dead ends: 149 [2020-10-28 09:10:24,888 INFO L226 Difference]: Without dead ends: 117 [2020-10-28 09:10:24,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:10:24,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-28 09:10:24,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 80. [2020-10-28 09:10:24,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-28 09:10:24,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-10-28 09:10:24,903 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 76 [2020-10-28 09:10:24,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:24,904 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-10-28 09:10:24,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 09:10:24,904 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-10-28 09:10:24,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-28 09:10:24,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:24,905 INFO L422 BasicCegarLoop]: trace histogram [24, 15, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:24,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 09:10:24,905 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:24,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:24,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1536406369, now seen corresponding path program 24 times [2020-10-28 09:10:24,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:24,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135111538] [2020-10-28 09:10:24,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:24,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:24,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:25,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:29,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:29,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 09:10:29,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:10:29,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 09:10:29,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:29,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:29,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 09:10:29,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:10:29,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 09:10:29,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:30,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:30,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:30,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:30,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:30,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:30,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:30,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:10:30,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:30,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:30,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:30,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:30,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:30,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:30,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-28 09:10:30,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:30,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:30,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:30,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:10:30,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:30,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:10:30,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:30,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:30,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:30,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:10:30,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:30,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:30,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-28 09:10:30,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:30,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:30,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:30,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:10:30,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:30,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:10:30,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:30,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:30,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:30,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:10:30,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:30,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:30,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-28 09:10:30,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:30,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:30,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:30,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:10:30,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:30,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:10:30,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:30,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:30,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:30,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:10:30,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:30,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:30,456 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 6 proven. 300 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-28 09:10:30,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135111538] [2020-10-28 09:10:30,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:30,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 09:10:30,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331697217] [2020-10-28 09:10:30,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 09:10:30,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:30,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 09:10:30,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:10:30,459 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 28 states. [2020-10-28 09:10:30,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:30,954 INFO L93 Difference]: Finished difference Result 158 states and 171 transitions. [2020-10-28 09:10:30,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 09:10:30,955 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 77 [2020-10-28 09:10:30,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:30,956 INFO L225 Difference]: With dead ends: 158 [2020-10-28 09:10:30,956 INFO L226 Difference]: Without dead ends: 109 [2020-10-28 09:10:30,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:10:30,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-28 09:10:30,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 81. [2020-10-28 09:10:30,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-28 09:10:30,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-10-28 09:10:30,972 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 77 [2020-10-28 09:10:30,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:30,972 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-10-28 09:10:30,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 09:10:30,973 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-10-28 09:10:30,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 09:10:30,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:30,974 INFO L422 BasicCegarLoop]: trace histogram [25, 15, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:30,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 09:10:30,974 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:30,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:30,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1458808045, now seen corresponding path program 25 times [2020-10-28 09:10:30,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:30,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104822660] [2020-10-28 09:10:30,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:31,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:31,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:31,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:36,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:36,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 09:10:36,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:10:36,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 09:10:36,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:36,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:36,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 09:10:36,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:10:36,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 09:10:36,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:36,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:36,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:36,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:36,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:36,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:36,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:36,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:10:36,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:36,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:36,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:36,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:36,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:36,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:36,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-28 09:10:36,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:36,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:36,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:36,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:10:36,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:36,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:10:36,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:36,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:36,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:36,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:10:36,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:36,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:36,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-28 09:10:36,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:36,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:36,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:36,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:10:36,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:36,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:10:36,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:36,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:36,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:36,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:10:36,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:36,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:36,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-28 09:10:36,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:36,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:36,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:36,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:10:36,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:36,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:10:36,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:36,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:36,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:36,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:10:36,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:36,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:36,662 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 6 proven. 325 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-28 09:10:36,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104822660] [2020-10-28 09:10:36,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:36,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 09:10:36,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101684277] [2020-10-28 09:10:36,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 09:10:36,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:36,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 09:10:36,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:10:36,664 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 29 states. [2020-10-28 09:10:37,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:37,202 INFO L93 Difference]: Finished difference Result 162 states and 176 transitions. [2020-10-28 09:10:37,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 09:10:37,203 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 78 [2020-10-28 09:10:37,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:37,204 INFO L225 Difference]: With dead ends: 162 [2020-10-28 09:10:37,204 INFO L226 Difference]: Without dead ends: 113 [2020-10-28 09:10:37,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:10:37,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-28 09:10:37,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 82. [2020-10-28 09:10:37,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-28 09:10:37,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-10-28 09:10:37,224 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 78 [2020-10-28 09:10:37,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:37,227 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-10-28 09:10:37,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 09:10:37,227 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-10-28 09:10:37,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 09:10:37,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:37,231 INFO L422 BasicCegarLoop]: trace histogram [26, 15, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:37,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 09:10:37,231 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:37,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:37,232 INFO L82 PathProgramCache]: Analyzing trace with hash 178825633, now seen corresponding path program 26 times [2020-10-28 09:10:37,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:37,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514569544] [2020-10-28 09:10:37,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:37,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:37,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:37,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:42,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:42,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 09:10:42,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:10:42,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 09:10:42,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:42,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:42,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 09:10:42,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 09:10:42,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 09:10:42,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:42,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:42,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:42,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:42,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:42,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:42,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:42,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:10:42,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:42,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:42,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:42,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:42,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:42,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:42,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-28 09:10:42,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:42,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:42,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:42,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:10:42,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:42,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:10:42,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:42,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:42,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:42,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:10:42,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:42,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:42,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-28 09:10:42,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:42,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:42,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:42,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:10:42,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:42,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:10:42,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:42,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:42,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:42,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:10:42,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:42,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:42,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-28 09:10:42,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:42,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:42,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:42,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:10:42,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:42,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:10:42,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:42,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:42,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:42,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:10:42,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:42,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:42,575 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 6 proven. 120 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2020-10-28 09:10:42,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514569544] [2020-10-28 09:10:42,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:42,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 09:10:42,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828870528] [2020-10-28 09:10:42,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 09:10:42,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:42,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 09:10:42,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:10:42,577 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 19 states. [2020-10-28 09:10:43,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:43,115 INFO L93 Difference]: Finished difference Result 155 states and 171 transitions. [2020-10-28 09:10:43,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 09:10:43,116 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 79 [2020-10-28 09:10:43,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:43,117 INFO L225 Difference]: With dead ends: 155 [2020-10-28 09:10:43,118 INFO L226 Difference]: Without dead ends: 123 [2020-10-28 09:10:43,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:10:43,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-28 09:10:43,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 83. [2020-10-28 09:10:43,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-28 09:10:43,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-10-28 09:10:43,141 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 79 [2020-10-28 09:10:43,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:43,141 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-10-28 09:10:43,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 09:10:43,141 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-10-28 09:10:43,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 09:10:43,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:43,142 INFO L422 BasicCegarLoop]: trace histogram [26, 16, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:43,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-28 09:10:43,143 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:43,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:43,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1357788878, now seen corresponding path program 27 times [2020-10-28 09:10:43,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:43,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521614116] [2020-10-28 09:10:43,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:43,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:43,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:43,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:48,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:48,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 09:10:48,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:10:48,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 09:10:48,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:48,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:48,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 09:10:48,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:10:48,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 09:10:48,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:48,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:48,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:48,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:48,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:48,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:48,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:48,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:10:48,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:48,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:48,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:48,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:48,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:48,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:48,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-28 09:10:48,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:48,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:48,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:48,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:10:48,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:48,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:10:48,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:48,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:48,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:48,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:10:48,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:48,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:48,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-28 09:10:48,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:48,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:48,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:48,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:10:48,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:48,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:10:48,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:48,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:48,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:48,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:10:48,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:48,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:48,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-28 09:10:48,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:48,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:48,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:48,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:10:48,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:48,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:10:48,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:48,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:48,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:48,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:10:48,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:48,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:48,854 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 6 proven. 351 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2020-10-28 09:10:48,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521614116] [2020-10-28 09:10:48,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:48,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 09:10:48,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490083502] [2020-10-28 09:10:48,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 09:10:48,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:48,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 09:10:48,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:10:48,855 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 30 states. [2020-10-28 09:10:49,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:49,423 INFO L93 Difference]: Finished difference Result 165 states and 179 transitions. [2020-10-28 09:10:49,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 09:10:49,424 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 80 [2020-10-28 09:10:49,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:49,425 INFO L225 Difference]: With dead ends: 165 [2020-10-28 09:10:49,425 INFO L226 Difference]: Without dead ends: 115 [2020-10-28 09:10:49,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:10:49,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-28 09:10:49,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 84. [2020-10-28 09:10:49,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-28 09:10:49,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-10-28 09:10:49,442 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 80 [2020-10-28 09:10:49,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:49,442 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-10-28 09:10:49,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 09:10:49,442 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-10-28 09:10:49,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 09:10:49,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:49,443 INFO L422 BasicCegarLoop]: trace histogram [27, 16, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:49,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-28 09:10:49,444 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:49,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:49,444 INFO L82 PathProgramCache]: Analyzing trace with hash 450145344, now seen corresponding path program 28 times [2020-10-28 09:10:49,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:49,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634202148] [2020-10-28 09:10:49,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:49,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:49,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:49,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:54,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:54,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-28 09:10:54,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:10:54,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:10:54,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:54,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:54,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 09:10:54,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-28 09:10:54,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 09:10:54,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:54,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:54,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:54,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:54,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:54,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:54,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:54,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:10:54,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:54,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:54,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:54,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:54,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:54,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:54,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-28 09:10:54,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:54,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:54,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:54,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:10:54,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:54,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:10:54,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:54,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:54,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:54,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:10:54,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:54,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:54,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-28 09:10:54,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:54,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:54,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:54,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:10:54,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:54,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:10:54,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:54,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:54,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:54,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:10:54,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:54,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:54,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-10-28 09:10:54,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:54,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:54,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:54,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:10:54,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:54,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:10:54,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:54,791 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:54,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:54,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:10:54,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:54,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:54,795 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 6 proven. 136 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2020-10-28 09:10:54,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634202148] [2020-10-28 09:10:54,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:54,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 09:10:54,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166262881] [2020-10-28 09:10:54,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 09:10:54,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:54,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 09:10:54,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:10:54,797 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 20 states. [2020-10-28 09:10:55,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:55,303 INFO L93 Difference]: Finished difference Result 160 states and 177 transitions. [2020-10-28 09:10:55,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:10:55,304 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 81 [2020-10-28 09:10:55,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:55,306 INFO L225 Difference]: With dead ends: 160 [2020-10-28 09:10:55,306 INFO L226 Difference]: Without dead ends: 128 [2020-10-28 09:10:55,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:10:55,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-28 09:10:55,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 85. [2020-10-28 09:10:55,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-28 09:10:55,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2020-10-28 09:10:55,323 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 81 [2020-10-28 09:10:55,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:55,323 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2020-10-28 09:10:55,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 09:10:55,323 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2020-10-28 09:10:55,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 09:10:55,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:55,324 INFO L422 BasicCegarLoop]: trace histogram [27, 17, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:55,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-28 09:10:55,324 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:55,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:55,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1536812429, now seen corresponding path program 29 times [2020-10-28 09:10:55,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:55,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597296630] [2020-10-28 09:10:55,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:55,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:55,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:55,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:00,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:00,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-28 09:11:00,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:11:00,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:11:00,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:00,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:00,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 09:11:00,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:11:00,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 09:11:00,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:01,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:11:01,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:01,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:01,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:01,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:11:01,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:01,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:11:01,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:01,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:01,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:01,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:01,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:01,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:01,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-28 09:11:01,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:01,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:01,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:01,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:01,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:01,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:11:01,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:01,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:01,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:01,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:11:01,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:01,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:01,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-28 09:11:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:01,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:01,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:01,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:01,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:01,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:11:01,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:01,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:01,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:01,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:11:01,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:01,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:01,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-28 09:11:01,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:01,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:01,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:01,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:01,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:01,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:11:01,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:01,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:01,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:01,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:11:01,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:01,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:01,060 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 6 proven. 378 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-10-28 09:11:01,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597296630] [2020-10-28 09:11:01,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:11:01,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 09:11:01,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291558517] [2020-10-28 09:11:01,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 09:11:01,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:11:01,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 09:11:01,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 09:11:01,062 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 31 states. [2020-10-28 09:11:01,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:11:01,741 INFO L93 Difference]: Finished difference Result 171 states and 186 transitions. [2020-10-28 09:11:01,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 09:11:01,742 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 82 [2020-10-28 09:11:01,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:11:01,744 INFO L225 Difference]: With dead ends: 171 [2020-10-28 09:11:01,744 INFO L226 Difference]: Without dead ends: 120 [2020-10-28 09:11:01,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 09:11:01,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-28 09:11:01,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 86. [2020-10-28 09:11:01,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-28 09:11:01,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-10-28 09:11:01,759 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 82 [2020-10-28 09:11:01,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:11:01,759 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-10-28 09:11:01,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 09:11:01,759 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-10-28 09:11:01,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 09:11:01,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:11:01,760 INFO L422 BasicCegarLoop]: trace histogram [28, 17, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:11:01,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-28 09:11:01,761 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:11:01,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:11:01,761 INFO L82 PathProgramCache]: Analyzing trace with hash 721187329, now seen corresponding path program 30 times [2020-10-28 09:11:01,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:11:01,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645820358] [2020-10-28 09:11:01,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:11:01,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:01,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:02,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:06,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:06,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-28 09:11:06,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:11:06,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-28 09:11:06,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:06,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:06,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 09:11:06,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:11:06,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 09:11:06,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:07,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:11:07,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:07,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:07,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:07,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:11:07,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:07,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:11:07,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:07,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:07,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:07,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:07,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:07,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:07,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-28 09:11:07,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:07,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:07,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:07,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:07,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:07,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:11:07,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:07,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:07,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:07,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:11:07,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:07,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:07,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-28 09:11:07,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:07,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:07,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:07,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:07,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:07,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:11:07,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:07,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:07,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:07,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:11:07,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:07,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:07,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-28 09:11:07,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:07,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:07,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:07,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:07,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:07,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:11:07,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:07,670 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:07,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:07,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:11:07,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:07,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:07,679 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 6 proven. 406 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-10-28 09:11:07,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645820358] [2020-10-28 09:11:07,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:11:07,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 09:11:07,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851245894] [2020-10-28 09:11:07,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 09:11:07,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:11:07,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 09:11:07,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 09:11:07,681 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 32 states. [2020-10-28 09:11:08,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:11:08,267 INFO L93 Difference]: Finished difference Result 172 states and 187 transitions. [2020-10-28 09:11:08,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 09:11:08,268 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 83 [2020-10-28 09:11:08,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:11:08,269 INFO L225 Difference]: With dead ends: 172 [2020-10-28 09:11:08,269 INFO L226 Difference]: Without dead ends: 121 [2020-10-28 09:11:08,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 09:11:08,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-28 09:11:08,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 87. [2020-10-28 09:11:08,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-28 09:11:08,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-10-28 09:11:08,293 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 83 [2020-10-28 09:11:08,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:11:08,293 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-10-28 09:11:08,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 09:11:08,294 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-10-28 09:11:08,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 09:11:08,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:11:08,294 INFO L422 BasicCegarLoop]: trace histogram [29, 17, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:11:08,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-28 09:11:08,295 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:11:08,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:11:08,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1999703091, now seen corresponding path program 31 times [2020-10-28 09:11:08,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:11:08,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987110476] [2020-10-28 09:11:08,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:11:08,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:08,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:08,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:13,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:13,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-28 09:11:13,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:11:13,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-28 09:11:13,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:13,349 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:13,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 09:11:13,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-28 09:11:13,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 09:11:13,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:13,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:11:13,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:13,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:13,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:13,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:11:13,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:13,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:11:13,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:13,729 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:13,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:13,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:13,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:13,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:11:13,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-28 09:11:13,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:13,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:13,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:13,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:13,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:13,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:11:13,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:13,736 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:13,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:13,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:11:13,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:13,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:11:13,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-28 09:11:13,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:13,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:13,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:13,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:13,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:13,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:11:13,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:13,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:13,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:13,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:11:13,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:13,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:13,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-28 09:11:13,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:13,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:13,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:13,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:13,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:13,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:11:13,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:13,748 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:13,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:13,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:11:13,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:13,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:13,758 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 6 proven. 153 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2020-10-28 09:11:13,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987110476] [2020-10-28 09:11:13,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:11:13,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 09:11:13,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247493294] [2020-10-28 09:11:13,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 09:11:13,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:11:13,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 09:11:13,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:11:13,760 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 21 states. [2020-10-28 09:11:14,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:11:14,369 INFO L93 Difference]: Finished difference Result 166 states and 184 transitions. [2020-10-28 09:11:14,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 09:11:14,370 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 84 [2020-10-28 09:11:14,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:11:14,371 INFO L225 Difference]: With dead ends: 166 [2020-10-28 09:11:14,372 INFO L226 Difference]: Without dead ends: 134 [2020-10-28 09:11:14,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:11:14,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-28 09:11:14,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 88. [2020-10-28 09:11:14,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-28 09:11:14,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2020-10-28 09:11:14,400 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 84 [2020-10-28 09:11:14,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:11:14,401 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2020-10-28 09:11:14,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 09:11:14,401 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2020-10-28 09:11:14,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 09:11:14,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:11:14,402 INFO L422 BasicCegarLoop]: trace histogram [29, 18, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:11:14,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-28 09:11:14,402 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:11:14,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:11:14,403 INFO L82 PathProgramCache]: Analyzing trace with hash -745162528, now seen corresponding path program 32 times [2020-10-28 09:11:14,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:11:14,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413399576] [2020-10-28 09:11:14,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:11:14,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:14,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:14,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:19,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:19,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 09:11:19,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:11:19,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 09:11:19,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:19,445 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:19,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 09:11:19,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:11:19,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 09:11:19,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0