/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=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loop-acceleration/const_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:30:48,178 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:30:48,182 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:30:48,236 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:30:48,237 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:30:48,243 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:30:48,245 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:30:48,250 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:30:48,253 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:30:48,259 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:30:48,260 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:30:48,262 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:30:48,262 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:30:48,265 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:30:48,267 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:30:48,268 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:30:48,270 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:30:48,272 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:30:48,289 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:30:48,296 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:30:48,298 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:30:48,299 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:30:48,301 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:30:48,303 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:30:48,311 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:30:48,312 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:30:48,312 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:30:48,314 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:30:48,315 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:30:48,316 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:30:48,316 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:30:48,317 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:30:48,319 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:30:48,320 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:30:48,321 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:30:48,321 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:30:48,322 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:30:48,322 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:30:48,322 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:30:48,323 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:30:48,324 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:30:48,331 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 01:30:48,377 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:30:48,377 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:30:48,381 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:30:48,382 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:30:48,382 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:30:48,382 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:30:48,382 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:30:48,383 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:30:48,383 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:30:48,383 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:30:48,384 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:30:48,384 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:30:48,384 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:30:48,385 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:30:48,385 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:30:48,385 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:30:48,385 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:30:48,385 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:30:48,386 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:30:48,386 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:30:48,386 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:30:48,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:30:48,386 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:30:48,387 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:30:48,387 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:30:48,387 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:30:48,387 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:30:48,387 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:30:48,387 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:30:48,388 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:30:48,799 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:30:48,822 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:30:48,825 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:30:48,827 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:30:48,827 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:30:48,828 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/const_1-1.c [2020-10-27 01:30:48,908 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bcda3f30e/a063a41c5fef47838394dd1567f3803e/FLAGb545c087b [2020-10-27 01:30:49,405 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:30:49,406 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/const_1-1.c [2020-10-27 01:30:49,412 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bcda3f30e/a063a41c5fef47838394dd1567f3803e/FLAGb545c087b [2020-10-27 01:30:49,793 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bcda3f30e/a063a41c5fef47838394dd1567f3803e [2020-10-27 01:30:49,796 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:30:49,805 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:30:49,810 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:30:49,811 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:30:49,815 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:30:49,817 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:30:49" (1/1) ... [2020-10-27 01:30:49,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62b36651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:30:49, skipping insertion in model container [2020-10-27 01:30:49,823 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:30:49" (1/1) ... [2020-10-27 01:30:49,831 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:30:49,848 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:30:50,080 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:30:50,089 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:30:50,106 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:30:50,122 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:30:50,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:30:50 WrapperNode [2020-10-27 01:30:50,123 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:30:50,125 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:30:50,125 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:30:50,125 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:30:50,138 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:30:50" (1/1) ... [2020-10-27 01:30:50,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:30:50" (1/1) ... [2020-10-27 01:30:50,147 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:30:50" (1/1) ... [2020-10-27 01:30:50,147 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:30:50" (1/1) ... [2020-10-27 01:30:50,153 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:30:50" (1/1) ... [2020-10-27 01:30:50,157 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:30:50" (1/1) ... [2020-10-27 01:30:50,158 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:30:50" (1/1) ... [2020-10-27 01:30:50,160 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:30:50,161 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:30:50,161 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:30:50,161 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:30:50,162 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:30:50" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:30:50,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:30:50,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:30:50,240 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:30:50,241 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:30:50,241 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:30:50,241 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:30:50,241 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:30:50,241 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:30:50,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:30:50,242 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:30:50,242 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:30:50,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:30:50,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:30:50,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:30:50,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:30:50,243 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:30:50,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:30:50,591 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:30:50,591 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 01:30:50,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:30:50 BoogieIcfgContainer [2020-10-27 01:30:50,594 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:30:50,596 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:30:50,596 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:30:50,599 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:30:50,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:30:49" (1/3) ... [2020-10-27 01:30:50,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34b98f59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:30:50, skipping insertion in model container [2020-10-27 01:30:50,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:30:50" (2/3) ... [2020-10-27 01:30:50,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34b98f59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:30:50, skipping insertion in model container [2020-10-27 01:30:50,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:30:50" (3/3) ... [2020-10-27 01:30:50,603 INFO L111 eAbstractionObserver]: Analyzing ICFG const_1-1.c [2020-10-27 01:30:50,615 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:30:50,620 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:30:50,635 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:30:50,679 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:30:50,680 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:30:50,680 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:30:50,680 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:30:50,680 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:30:50,681 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:30:50,681 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:30:50,681 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:30:50,705 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-27 01:30:50,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 01:30:50,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:50,711 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:50,712 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:50,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:50,725 INFO L82 PathProgramCache]: Analyzing trace with hash 783588435, now seen corresponding path program 1 times [2020-10-27 01:30:50,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:50,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515330553] [2020-10-27 01:30:50,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:50,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:51,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:51,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:51,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 01:30:51,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:51,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-27 01:30:51,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:51,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:51,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:30:51,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:51,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:30:51,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:51,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:51,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:51,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:51,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:51,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:51,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 01:30:51,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:51,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:51,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:51,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:51,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:51,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:30:51,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515330553] [2020-10-27 01:30:51,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:30:51,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 01:30:51,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027791343] [2020-10-27 01:30:51,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 01:30:51,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:51,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 01:30:51,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 01:30:51,254 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-10-27 01:30:51,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:51,359 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-10-27 01:30:51,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 01:30:51,361 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-27 01:30:51,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:51,370 INFO L225 Difference]: With dead ends: 34 [2020-10-27 01:30:51,370 INFO L226 Difference]: Without dead ends: 13 [2020-10-27 01:30:51,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 01:30:51,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-27 01:30:51,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-27 01:30:51,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-27 01:30:51,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-27 01:30:51,418 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 12 [2020-10-27 01:30:51,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:51,419 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-27 01:30:51,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 01:30:51,419 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-27 01:30:51,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 01:30:51,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:51,420 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:51,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:30:51,420 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:51,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:51,421 INFO L82 PathProgramCache]: Analyzing trace with hash 669071831, now seen corresponding path program 1 times [2020-10-27 01:30:51,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:51,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162544738] [2020-10-27 01:30:51,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:51,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:51,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:51,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:51,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 01:30:51,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:51,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-27 01:30:51,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:51,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:30:51,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:51,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:30:51,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:51,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:51,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:51,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:51,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:51,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:51,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:51,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 01:30:51,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:51,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:51,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:51,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:51,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:51,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:30:51,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162544738] [2020-10-27 01:30:51,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:30:51,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:30:51,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083255820] [2020-10-27 01:30:51,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:30:51,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:51,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:30:51,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:30:51,675 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 4 states. [2020-10-27 01:30:51,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:51,771 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-10-27 01:30:51,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:30:51,772 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-27 01:30:51,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:51,773 INFO L225 Difference]: With dead ends: 20 [2020-10-27 01:30:51,773 INFO L226 Difference]: Without dead ends: 14 [2020-10-27 01:30:51,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:30:51,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-27 01:30:51,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-27 01:30:51,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-27 01:30:51,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-27 01:30:51,782 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-27 01:30:51,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:51,783 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-27 01:30:51,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:30:51,783 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-27 01:30:51,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 01:30:51,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:51,784 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:51,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:30:51,784 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:51,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:51,785 INFO L82 PathProgramCache]: Analyzing trace with hash 396678398, now seen corresponding path program 1 times [2020-10-27 01:30:51,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:51,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764127673] [2020-10-27 01:30:51,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:51,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:51,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:51,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:52,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:52,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 01:30:52,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:30:52,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-10-27 01:30:52,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:52,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:30:52,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:52,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 01:30:52,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:30:52,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:52,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:52,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:52,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:52,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:52,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:52,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:30:52,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:52,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:52,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:52,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:52,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:52,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:30:52,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [764127673] [2020-10-27 01:30:52,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:30:52,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:30:52,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905555104] [2020-10-27 01:30:52,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:30:52,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:52,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:30:52,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:30:52,256 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 5 states. [2020-10-27 01:30:52,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:52,385 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-27 01:30:52,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:30:52,386 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-27 01:30:52,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:52,387 INFO L225 Difference]: With dead ends: 21 [2020-10-27 01:30:52,387 INFO L226 Difference]: Without dead ends: 15 [2020-10-27 01:30:52,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:30:52,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-27 01:30:52,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-27 01:30:52,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-27 01:30:52,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-27 01:30:52,394 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-27 01:30:52,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:52,395 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-27 01:30:52,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:30:52,395 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-27 01:30:52,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-27 01:30:52,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:52,396 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:52,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:30:52,397 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:52,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:52,397 INFO L82 PathProgramCache]: Analyzing trace with hash 542416567, now seen corresponding path program 2 times [2020-10-27 01:30:52,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:52,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396510527] [2020-10-27 01:30:52,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:52,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:52,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:52,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:52,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:52,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 01:30:52,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:30:52,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 261 [2020-10-27 01:30:52,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:52,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:30:52,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:52,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:30:52,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:52,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:52,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:52,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:52,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:52,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:52,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:52,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:30:52,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:52,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:52,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:52,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:52,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:52,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:30:52,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396510527] [2020-10-27 01:30:52,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:30:52,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:30:52,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459192853] [2020-10-27 01:30:52,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:30:52,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:52,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:30:52,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:30:52,778 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 6 states. [2020-10-27 01:30:52,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:52,941 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-27 01:30:52,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:30:52,941 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-27 01:30:52,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:52,942 INFO L225 Difference]: With dead ends: 22 [2020-10-27 01:30:52,942 INFO L226 Difference]: Without dead ends: 16 [2020-10-27 01:30:52,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:30:52,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-27 01:30:52,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-27 01:30:52,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-27 01:30:52,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-27 01:30:52,949 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-10-27 01:30:52,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:52,949 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-27 01:30:52,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:30:52,949 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-27 01:30:52,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 01:30:52,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:52,950 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:52,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:30:52,950 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:52,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:52,951 INFO L82 PathProgramCache]: Analyzing trace with hash 765332510, now seen corresponding path program 3 times [2020-10-27 01:30:52,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:52,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276314304] [2020-10-27 01:30:52,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:52,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:52,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:53,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:53,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:53,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 01:30:53,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:30:53,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 251 [2020-10-27 01:30:53,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:53,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:30:53,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:53,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 01:30:53,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:53,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:53,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:53,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:53,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:53,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:53,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:53,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:30:53,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:53,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:53,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:53,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:53,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:53,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:30:53,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276314304] [2020-10-27 01:30:53,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:30:53,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:30:53,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4746660] [2020-10-27 01:30:53,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:30:53,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:53,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:30:53,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:30:53,361 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 7 states. [2020-10-27 01:30:53,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:53,579 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-10-27 01:30:53,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:30:53,579 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-10-27 01:30:53,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:53,580 INFO L225 Difference]: With dead ends: 23 [2020-10-27 01:30:53,580 INFO L226 Difference]: Without dead ends: 17 [2020-10-27 01:30:53,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:30:53,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-27 01:30:53,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-27 01:30:53,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-27 01:30:53,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-27 01:30:53,587 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-10-27 01:30:53,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:53,587 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-27 01:30:53,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:30:53,588 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-27 01:30:53,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:30:53,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:53,588 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:53,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:30:53,589 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:53,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:53,589 INFO L82 PathProgramCache]: Analyzing trace with hash -914207849, now seen corresponding path program 4 times [2020-10-27 01:30:53,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:53,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1297535185] [2020-10-27 01:30:53,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:53,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:53,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:53,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:53,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:53,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 01:30:53,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:30:53,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 334 [2020-10-27 01:30:53,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:53,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:30:53,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:53,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:30:53,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:54,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:54,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:54,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:54,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:54,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:54,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:54,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:30:54,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:54,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:54,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:54,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:54,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:54,062 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:30:54,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1297535185] [2020-10-27 01:30:54,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:30:54,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:30:54,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023661837] [2020-10-27 01:30:54,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:30:54,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:54,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:30:54,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:30:54,065 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 8 states. [2020-10-27 01:30:54,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:54,332 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-27 01:30:54,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:30:54,333 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-27 01:30:54,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:54,333 INFO L225 Difference]: With dead ends: 24 [2020-10-27 01:30:54,333 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 01:30:54,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:30:54,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 01:30:54,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-27 01:30:54,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-27 01:30:54,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-27 01:30:54,340 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-10-27 01:30:54,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:54,340 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-27 01:30:54,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:30:54,340 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-27 01:30:54,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 01:30:54,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:54,341 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:54,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:30:54,342 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:54,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:54,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1440351426, now seen corresponding path program 5 times [2020-10-27 01:30:54,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:54,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890363665] [2020-10-27 01:30:54,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:54,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:54,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:54,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:54,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:54,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 01:30:54,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:30:54,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 332 [2020-10-27 01:30:54,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:54,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:30:54,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:54,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:30:54,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:54,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:54,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:54,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:54,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:54,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:54,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:54,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 01:30:54,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:54,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:54,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:54,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:54,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:54,833 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:30:54,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890363665] [2020-10-27 01:30:54,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:30:54,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:30:54,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106004032] [2020-10-27 01:30:54,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:30:54,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:54,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:30:54,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:30:54,835 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 9 states. [2020-10-27 01:30:55,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:55,174 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-10-27 01:30:55,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:30:55,175 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-10-27 01:30:55,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:55,175 INFO L225 Difference]: With dead ends: 25 [2020-10-27 01:30:55,175 INFO L226 Difference]: Without dead ends: 19 [2020-10-27 01:30:55,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:30:55,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-27 01:30:55,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-27 01:30:55,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 01:30:55,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-27 01:30:55,182 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2020-10-27 01:30:55,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:55,183 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-27 01:30:55,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:30:55,183 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-27 01:30:55,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:30:55,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:55,184 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:55,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:30:55,184 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:55,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:55,185 INFO L82 PathProgramCache]: Analyzing trace with hash -570933129, now seen corresponding path program 6 times [2020-10-27 01:30:55,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:55,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245336401] [2020-10-27 01:30:55,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:55,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:55,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:55,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:55,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:55,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:30:55,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:30:55,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 527 [2020-10-27 01:30:55,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:55,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:30:55,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:55,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:30:55,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:55,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:55,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:55,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:55,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:55,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:55,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:55,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:30:55,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:55,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:55,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:55,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:55,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:55,881 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:30:55,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245336401] [2020-10-27 01:30:55,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:30:55,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:30:55,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239392786] [2020-10-27 01:30:55,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:30:55,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:55,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:30:55,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:30:55,891 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2020-10-27 01:30:56,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:56,247 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-27 01:30:56,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:30:56,247 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-27 01:30:56,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:56,249 INFO L225 Difference]: With dead ends: 26 [2020-10-27 01:30:56,249 INFO L226 Difference]: Without dead ends: 20 [2020-10-27 01:30:56,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:30:56,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-27 01:30:56,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-27 01:30:56,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-27 01:30:56,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-10-27 01:30:56,260 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2020-10-27 01:30:56,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:56,261 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-10-27 01:30:56,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:30:56,261 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-10-27 01:30:56,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 01:30:56,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:56,262 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:56,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:30:56,264 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:56,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:56,264 INFO L82 PathProgramCache]: Analyzing trace with hash 611230302, now seen corresponding path program 7 times [2020-10-27 01:30:56,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:56,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529338320] [2020-10-27 01:30:56,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:56,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:56,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:56,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:56,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:56,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:30:56,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:30:56,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 624 [2020-10-27 01:30:56,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:56,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:30:56,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:56,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:30:56,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:57,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:57,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:57,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:57,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:57,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:57,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:57,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:30:57,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:57,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:57,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:57,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:57,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:57,093 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:30:57,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529338320] [2020-10-27 01:30:57,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:30:57,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:30:57,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332526018] [2020-10-27 01:30:57,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:30:57,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:57,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:30:57,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:30:57,095 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 11 states. [2020-10-27 01:30:57,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:57,555 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-10-27 01:30:57,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:30:57,555 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-10-27 01:30:57,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:57,556 INFO L225 Difference]: With dead ends: 27 [2020-10-27 01:30:57,556 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 01:30:57,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:30:57,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 01:30:57,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-27 01:30:57,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-27 01:30:57,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-27 01:30:57,563 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2020-10-27 01:30:57,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:57,563 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-27 01:30:57,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:30:57,563 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-27 01:30:57,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 01:30:57,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:57,564 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:57,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:30:57,565 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:57,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:57,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1396409001, now seen corresponding path program 8 times [2020-10-27 01:30:57,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:57,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410476688] [2020-10-27 01:30:57,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:57,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:57,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:57,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:58,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:58,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:30:58,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:30:58,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 670 [2020-10-27 01:30:58,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:58,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:30:58,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:58,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:30:58,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:58,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:58,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:58,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:58,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:58,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:58,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:58,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:30:58,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:58,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:58,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:58,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:58,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:58,446 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:30:58,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410476688] [2020-10-27 01:30:58,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:30:58,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:30:58,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577195477] [2020-10-27 01:30:58,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:30:58,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:58,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:30:58,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:30:58,451 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 12 states. [2020-10-27 01:30:58,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:58,962 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-10-27 01:30:58,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:30:58,963 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-10-27 01:30:58,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:58,963 INFO L225 Difference]: With dead ends: 28 [2020-10-27 01:30:58,963 INFO L226 Difference]: Without dead ends: 22 [2020-10-27 01:30:58,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:30:58,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-27 01:30:58,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-27 01:30:58,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 01:30:58,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-10-27 01:30:58,970 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2020-10-27 01:30:58,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:58,971 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-10-27 01:30:58,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:30:58,971 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-10-27 01:30:58,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:30:58,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:58,972 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:58,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:30:58,972 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:58,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:58,973 INFO L82 PathProgramCache]: Analyzing trace with hash 791282046, now seen corresponding path program 9 times [2020-10-27 01:30:58,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:58,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668637911] [2020-10-27 01:30:58,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:58,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:59,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:59,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:59,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:59,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:30:59,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:30:59,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 592 [2020-10-27 01:30:59,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:59,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:30:59,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:59,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:30:59,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:59,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:59,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:59,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:59,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:59,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:59,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:59,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:30:59,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:59,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:59,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:59,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:59,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:59,801 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:30:59,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668637911] [2020-10-27 01:30:59,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:30:59,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:30:59,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736969526] [2020-10-27 01:30:59,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:30:59,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:59,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:30:59,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:30:59,804 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 13 states. [2020-10-27 01:31:00,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:00,327 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-10-27 01:31:00,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:31:00,328 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2020-10-27 01:31:00,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:00,328 INFO L225 Difference]: With dead ends: 29 [2020-10-27 01:31:00,328 INFO L226 Difference]: Without dead ends: 23 [2020-10-27 01:31:00,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:31:00,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-27 01:31:00,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-27 01:31:00,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 01:31:00,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-10-27 01:31:00,335 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2020-10-27 01:31:00,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:00,336 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-10-27 01:31:00,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:31:00,336 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-10-27 01:31:00,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:31:00,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:00,337 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:00,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:31:00,337 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:00,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:00,338 INFO L82 PathProgramCache]: Analyzing trace with hash -109772233, now seen corresponding path program 10 times [2020-10-27 01:31:00,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:00,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1048446170] [2020-10-27 01:31:00,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:00,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:00,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:00,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:00,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:00,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:31:00,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:00,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 504 [2020-10-27 01:31:00,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:00,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:31:00,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:00,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:31:00,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:01,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:01,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:01,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:01,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:01,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:01,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:01,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:31:01,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:01,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:01,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:01,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:01,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:01,071 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:01,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1048446170] [2020-10-27 01:31:01,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:01,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:31:01,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384274263] [2020-10-27 01:31:01,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:31:01,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:01,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:31:01,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:31:01,074 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 14 states. [2020-10-27 01:31:01,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:01,751 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-10-27 01:31:01,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:31:01,752 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2020-10-27 01:31:01,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:01,752 INFO L225 Difference]: With dead ends: 30 [2020-10-27 01:31:01,752 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 01:31:01,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:31:01,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 01:31:01,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-27 01:31:01,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-27 01:31:01,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-10-27 01:31:01,759 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2020-10-27 01:31:01,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:01,760 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-10-27 01:31:01,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:31:01,760 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-10-27 01:31:01,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:31:01,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:01,761 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:01,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:31:01,761 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:01,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:01,761 INFO L82 PathProgramCache]: Analyzing trace with hash 2022316190, now seen corresponding path program 11 times [2020-10-27 01:31:01,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:01,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718352095] [2020-10-27 01:31:01,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:01,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:01,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:01,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:02,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:02,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:31:02,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:02,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 640 [2020-10-27 01:31:02,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:02,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:31:02,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:02,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:31:02,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:02,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:02,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:02,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:02,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:02,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:02,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:02,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:31:02,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:02,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:02,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:02,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:02,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:02,670 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:02,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [718352095] [2020-10-27 01:31:02,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:02,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:31:02,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254645130] [2020-10-27 01:31:02,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:31:02,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:02,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:31:02,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:31:02,672 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 15 states. [2020-10-27 01:31:03,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:03,326 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-10-27 01:31:03,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:31:03,326 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2020-10-27 01:31:03,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:03,327 INFO L225 Difference]: With dead ends: 31 [2020-10-27 01:31:03,327 INFO L226 Difference]: Without dead ends: 25 [2020-10-27 01:31:03,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:31:03,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-27 01:31:03,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-27 01:31:03,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 01:31:03,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-10-27 01:31:03,336 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2020-10-27 01:31:03,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:03,336 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-10-27 01:31:03,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:31:03,336 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-10-27 01:31:03,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:31:03,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:03,337 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:03,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:31:03,337 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:03,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:03,338 INFO L82 PathProgramCache]: Analyzing trace with hash -602419433, now seen corresponding path program 12 times [2020-10-27 01:31:03,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:03,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568293774] [2020-10-27 01:31:03,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:03,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:03,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:03,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:04,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:04,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:31:04,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:04,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 650 [2020-10-27 01:31:04,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:04,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:31:04,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:04,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:31:04,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:04,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:04,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:04,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:04,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:04,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:04,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:04,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:31:04,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:04,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:04,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:04,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:04,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:04,294 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:04,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568293774] [2020-10-27 01:31:04,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:04,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:31:04,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057722721] [2020-10-27 01:31:04,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:31:04,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:04,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:31:04,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:31:04,297 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 16 states. [2020-10-27 01:31:05,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:05,006 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-27 01:31:05,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:31:05,007 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2020-10-27 01:31:05,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:05,008 INFO L225 Difference]: With dead ends: 32 [2020-10-27 01:31:05,008 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 01:31:05,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:31:05,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 01:31:05,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-27 01:31:05,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 01:31:05,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-10-27 01:31:05,019 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2020-10-27 01:31:05,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:05,020 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-10-27 01:31:05,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:31:05,020 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-10-27 01:31:05,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:31:05,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:05,025 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:05,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:31:05,027 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:05,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:05,027 INFO L82 PathProgramCache]: Analyzing trace with hash -364845122, now seen corresponding path program 13 times [2020-10-27 01:31:05,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:05,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976534336] [2020-10-27 01:31:05,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:05,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:05,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:05,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:06,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:06,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:31:06,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:06,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 954 [2020-10-27 01:31:06,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:06,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:31:06,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:06,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:31:06,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:06,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:06,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:06,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:06,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:06,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:06,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:06,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:31:06,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:06,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:06,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:06,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:06,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:06,304 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:06,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976534336] [2020-10-27 01:31:06,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:06,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:31:06,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663093498] [2020-10-27 01:31:06,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:31:06,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:06,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:31:06,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:31:06,308 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 17 states. [2020-10-27 01:31:07,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:07,121 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-10-27 01:31:07,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:31:07,122 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 25 [2020-10-27 01:31:07,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:07,123 INFO L225 Difference]: With dead ends: 33 [2020-10-27 01:31:07,123 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 01:31:07,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:31:07,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 01:31:07,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-27 01:31:07,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 01:31:07,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-27 01:31:07,137 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2020-10-27 01:31:07,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:07,137 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-27 01:31:07,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:31:07,137 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-27 01:31:07,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:31:07,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:07,138 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:07,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:31:07,139 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:07,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:07,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1589976073, now seen corresponding path program 14 times [2020-10-27 01:31:07,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:07,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [849730133] [2020-10-27 01:31:07,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:07,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:07,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:07,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:08,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:08,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:31:08,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:08,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1004 [2020-10-27 01:31:08,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:08,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:31:08,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:08,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:31:08,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:08,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:08,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:08,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:08,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:08,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:08,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:08,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:31:08,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:08,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:08,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:08,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:08,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:08,497 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:08,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [849730133] [2020-10-27 01:31:08,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:08,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:31:08,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381882041] [2020-10-27 01:31:08,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:31:08,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:08,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:31:08,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:31:08,502 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 18 states. [2020-10-27 01:31:09,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:09,450 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-27 01:31:09,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:31:09,452 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2020-10-27 01:31:09,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:09,453 INFO L225 Difference]: With dead ends: 34 [2020-10-27 01:31:09,453 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 01:31:09,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:31:09,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 01:31:09,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-27 01:31:09,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 01:31:09,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-10-27 01:31:09,466 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2020-10-27 01:31:09,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:09,466 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-10-27 01:31:09,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:31:09,467 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-10-27 01:31:09,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:31:09,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:09,467 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:09,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:31:09,468 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:09,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:09,470 INFO L82 PathProgramCache]: Analyzing trace with hash -914329890, now seen corresponding path program 15 times [2020-10-27 01:31:09,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:09,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38454197] [2020-10-27 01:31:09,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:09,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:09,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:09,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:10,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:10,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:31:10,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:10,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1069 [2020-10-27 01:31:10,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:10,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:31:10,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:10,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:31:10,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:10,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:10,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:10,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:10,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:10,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:10,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:10,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:31:10,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:10,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:10,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:10,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:10,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:31:10,929 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:10,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38454197] [2020-10-27 01:31:10,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:10,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:31:10,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028056027] [2020-10-27 01:31:10,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:31:10,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:10,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:31:10,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:31:10,937 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 19 states. [2020-10-27 01:31:11,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:11,956 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-10-27 01:31:11,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:31:11,957 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 27 [2020-10-27 01:31:11,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:11,958 INFO L225 Difference]: With dead ends: 35 [2020-10-27 01:31:11,958 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 01:31:11,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:31:11,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 01:31:11,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-27 01:31:11,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 01:31:11,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-10-27 01:31:11,966 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2020-10-27 01:31:11,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:11,966 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-10-27 01:31:11,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:31:11,966 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-10-27 01:31:11,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:31:11,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:11,967 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:11,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:31:11,967 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:11,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:11,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1444134697, now seen corresponding path program 16 times [2020-10-27 01:31:11,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:11,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385578765] [2020-10-27 01:31:11,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:11,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:11,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:12,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:12,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:12,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:31:12,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:12,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 903 [2020-10-27 01:31:12,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:12,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:31:12,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:12,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:31:12,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:13,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:13,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:13,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:13,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:13,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:13,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:13,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:31:13,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:13,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:13,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:13,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:13,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:13,267 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:13,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385578765] [2020-10-27 01:31:13,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:13,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:31:13,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53654876] [2020-10-27 01:31:13,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:31:13,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:13,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:31:13,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:31:13,269 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 20 states. [2020-10-27 01:31:14,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:14,375 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-10-27 01:31:14,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:31:14,376 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 28 [2020-10-27 01:31:14,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:14,377 INFO L225 Difference]: With dead ends: 36 [2020-10-27 01:31:14,377 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 01:31:14,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:31:14,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 01:31:14,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-27 01:31:14,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 01:31:14,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-10-27 01:31:14,386 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2020-10-27 01:31:14,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:14,386 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-10-27 01:31:14,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:31:14,386 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-10-27 01:31:14,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:31:14,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:14,387 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:14,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:31:14,387 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:14,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:14,388 INFO L82 PathProgramCache]: Analyzing trace with hash -688214530, now seen corresponding path program 17 times [2020-10-27 01:31:14,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:14,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997403037] [2020-10-27 01:31:14,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:14,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:14,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:14,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:15,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:15,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:31:15,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:15,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1171 [2020-10-27 01:31:15,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:15,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:31:15,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:15,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:31:15,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:15,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:15,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:15,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:15,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:15,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:15,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:15,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:31:15,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:15,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:15,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:15,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:15,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:15,979 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:15,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997403037] [2020-10-27 01:31:15,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:15,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:31:15,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200334696] [2020-10-27 01:31:15,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:31:15,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:15,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:31:15,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:31:15,981 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 21 states. [2020-10-27 01:31:17,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:17,178 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-10-27 01:31:17,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:31:17,185 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2020-10-27 01:31:17,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:17,186 INFO L225 Difference]: With dead ends: 37 [2020-10-27 01:31:17,186 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 01:31:17,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:31:17,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 01:31:17,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-27 01:31:17,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 01:31:17,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-10-27 01:31:17,194 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2020-10-27 01:31:17,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:17,194 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-10-27 01:31:17,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:31:17,194 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-10-27 01:31:17,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:31:17,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:17,195 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:17,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:31:17,195 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:17,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:17,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1270474167, now seen corresponding path program 18 times [2020-10-27 01:31:17,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:17,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996211961] [2020-10-27 01:31:17,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:17,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:17,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:17,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:18,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:18,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:31:18,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:18,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1064 [2020-10-27 01:31:18,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:18,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:31:18,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:18,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:31:18,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:18,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:18,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:18,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:18,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:18,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:18,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:18,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:31:18,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:18,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:18,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:18,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:18,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:18,759 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:18,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996211961] [2020-10-27 01:31:18,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:18,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:31:18,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399859753] [2020-10-27 01:31:18,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:31:18,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:18,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:31:18,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:31:18,761 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 22 states. [2020-10-27 01:31:20,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:20,046 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-10-27 01:31:20,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:31:20,046 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 30 [2020-10-27 01:31:20,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:20,047 INFO L225 Difference]: With dead ends: 38 [2020-10-27 01:31:20,047 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 01:31:20,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:31:20,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 01:31:20,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-27 01:31:20,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 01:31:20,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-10-27 01:31:20,056 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2020-10-27 01:31:20,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:20,056 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-10-27 01:31:20,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:31:20,056 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-10-27 01:31:20,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:31:20,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:20,057 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:20,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:31:20,057 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:20,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:20,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1860281630, now seen corresponding path program 19 times [2020-10-27 01:31:20,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:20,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692162745] [2020-10-27 01:31:20,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:20,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:20,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:20,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:21,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:21,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:31:21,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:21,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1136 [2020-10-27 01:31:21,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:21,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 01:31:21,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:21,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:31:21,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:21,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:21,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:21,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:21,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:21,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:21,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:21,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:31:21,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:21,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:21,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:21,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:21,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:21,731 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:21,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692162745] [2020-10-27 01:31:21,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:21,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 01:31:21,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478994995] [2020-10-27 01:31:21,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 01:31:21,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:21,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 01:31:21,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:31:21,733 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 23 states. [2020-10-27 01:31:23,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:23,082 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-10-27 01:31:23,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:31:23,082 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 31 [2020-10-27 01:31:23,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:23,083 INFO L225 Difference]: With dead ends: 39 [2020-10-27 01:31:23,083 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 01:31:23,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:31:23,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 01:31:23,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-27 01:31:23,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 01:31:23,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-10-27 01:31:23,101 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2020-10-27 01:31:23,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:23,102 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-10-27 01:31:23,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 01:31:23,102 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-10-27 01:31:23,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:31:23,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:23,103 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:23,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:31:23,103 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:23,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:23,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1330523497, now seen corresponding path program 20 times [2020-10-27 01:31:23,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:23,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166023056] [2020-10-27 01:31:23,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:23,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:23,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:23,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:24,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:24,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:31:24,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:24,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1188 [2020-10-27 01:31:24,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:24,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 01:31:24,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:24,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:31:24,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:24,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:24,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:24,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:24,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:24,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:24,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:24,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:31:24,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:24,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:24,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:24,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:24,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:24,873 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:24,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166023056] [2020-10-27 01:31:24,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:24,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 01:31:24,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552766941] [2020-10-27 01:31:24,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 01:31:24,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:24,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 01:31:24,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:31:24,876 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 24 states. [2020-10-27 01:31:26,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:26,290 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-10-27 01:31:26,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 01:31:26,293 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 32 [2020-10-27 01:31:26,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:26,293 INFO L225 Difference]: With dead ends: 40 [2020-10-27 01:31:26,293 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 01:31:26,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=189, Invalid=1791, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:31:26,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 01:31:26,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-27 01:31:26,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 01:31:26,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-10-27 01:31:26,311 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2020-10-27 01:31:26,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:26,312 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-10-27 01:31:26,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 01:31:26,312 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-10-27 01:31:26,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:31:26,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:26,312 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:26,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:31:26,313 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:26,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:26,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1461234626, now seen corresponding path program 21 times [2020-10-27 01:31:26,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:26,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122798158] [2020-10-27 01:31:26,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:26,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:26,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:26,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:27,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:27,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:31:27,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:27,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1437 [2020-10-27 01:31:27,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:27,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 01:31:27,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:27,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:31:27,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:28,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:28,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:28,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:28,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:28,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:28,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:28,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:31:28,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:28,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:28,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:28,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:28,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:28,352 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:28,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122798158] [2020-10-27 01:31:28,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:28,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 01:31:28,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452145184] [2020-10-27 01:31:28,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 01:31:28,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:28,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 01:31:28,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:31:28,354 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 25 states. [2020-10-27 01:31:29,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:29,986 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-10-27 01:31:29,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:31:29,986 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 33 [2020-10-27 01:31:29,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:29,987 INFO L225 Difference]: With dead ends: 41 [2020-10-27 01:31:29,987 INFO L226 Difference]: Without dead ends: 35 [2020-10-27 01:31:29,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=198, Invalid=1964, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:31:29,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-27 01:31:29,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-27 01:31:29,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 01:31:29,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-10-27 01:31:29,995 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2020-10-27 01:31:29,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:29,995 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-10-27 01:31:29,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 01:31:29,996 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-10-27 01:31:29,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:31:29,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:29,996 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:29,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:31:29,996 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:29,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:29,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1218312329, now seen corresponding path program 22 times [2020-10-27 01:31:29,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:29,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671141058] [2020-10-27 01:31:29,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:30,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:30,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:30,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:30,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:30,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:31:30,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:30,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 874 [2020-10-27 01:31:30,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:30,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 01:31:30,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:30,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:31:30,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:31,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:31,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:31,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:31,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:31,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:31,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:31,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:31:31,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:31,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:31,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:31,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:31,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:31,516 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:31,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671141058] [2020-10-27 01:31:31,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:31,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 01:31:31,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967385190] [2020-10-27 01:31:31,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 01:31:31,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:31,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 01:31:31,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:31:31,518 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 26 states. [2020-10-27 01:31:33,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:33,210 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-10-27 01:31:33,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:31:33,210 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 34 [2020-10-27 01:31:33,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:33,211 INFO L225 Difference]: With dead ends: 42 [2020-10-27 01:31:33,211 INFO L226 Difference]: Without dead ends: 36 [2020-10-27 01:31:33,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=207, Invalid=2145, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:31:33,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-27 01:31:33,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-27 01:31:33,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 01:31:33,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-10-27 01:31:33,221 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2020-10-27 01:31:33,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:33,221 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-10-27 01:31:33,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 01:31:33,221 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-10-27 01:31:33,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:31:33,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:33,222 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:33,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:31:33,225 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:33,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:33,225 INFO L82 PathProgramCache]: Analyzing trace with hash 2017311582, now seen corresponding path program 23 times [2020-10-27 01:31:33,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:33,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1109586197] [2020-10-27 01:31:33,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:33,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:33,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:33,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:34,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:34,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:31:34,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:34,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1260 [2020-10-27 01:31:34,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:34,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 01:31:34,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:34,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:31:34,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:35,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:35,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:35,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:35,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:35,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:35,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:35,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:31:35,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:35,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:35,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:35,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:35,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:35,172 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:35,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1109586197] [2020-10-27 01:31:35,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:35,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 01:31:35,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524401568] [2020-10-27 01:31:35,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 01:31:35,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:35,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 01:31:35,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:31:35,174 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 27 states. [2020-10-27 01:31:37,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:37,046 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-10-27 01:31:37,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 01:31:37,047 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 35 [2020-10-27 01:31:37,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:37,048 INFO L225 Difference]: With dead ends: 43 [2020-10-27 01:31:37,048 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 01:31:37,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=216, Invalid=2334, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 01:31:37,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 01:31:37,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-27 01:31:37,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 01:31:37,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-10-27 01:31:37,056 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2020-10-27 01:31:37,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:37,056 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-10-27 01:31:37,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 01:31:37,056 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-10-27 01:31:37,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:31:37,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:37,057 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:37,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:31:37,057 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:37,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:37,058 INFO L82 PathProgramCache]: Analyzing trace with hash -757562281, now seen corresponding path program 24 times [2020-10-27 01:31:37,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:37,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364382984] [2020-10-27 01:31:37,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:37,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:37,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:37,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:38,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:38,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:31:38,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:38,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1328 [2020-10-27 01:31:38,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:38,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 01:31:38,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:38,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:31:38,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:39,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:39,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:39,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:39,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:39,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:39,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:39,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:31:39,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:39,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:39,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:39,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:39,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:39,103 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:39,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364382984] [2020-10-27 01:31:39,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:39,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 01:31:39,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238445938] [2020-10-27 01:31:39,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 01:31:39,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:39,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 01:31:39,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:31:39,105 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 28 states. [2020-10-27 01:31:41,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:41,048 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-10-27 01:31:41,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 01:31:41,048 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 36 [2020-10-27 01:31:41,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:41,049 INFO L225 Difference]: With dead ends: 44 [2020-10-27 01:31:41,049 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 01:31:41,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=225, Invalid=2531, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 01:31:41,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 01:31:41,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-27 01:31:41,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 01:31:41,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-10-27 01:31:41,058 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2020-10-27 01:31:41,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:41,058 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-10-27 01:31:41,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 01:31:41,058 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-10-27 01:31:41,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:31:41,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:41,059 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:41,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:31:41,059 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:41,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:41,060 INFO L82 PathProgramCache]: Analyzing trace with hash -879306114, now seen corresponding path program 25 times [2020-10-27 01:31:41,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:41,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020541073] [2020-10-27 01:31:41,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:41,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:41,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:41,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:42,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:42,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:31:42,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:42,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1290 [2020-10-27 01:31:42,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:42,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 01:31:42,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:42,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:31:42,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:43,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:43,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:43,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:43,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:43,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:43,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:43,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:31:43,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:43,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:43,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:43,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:43,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:43,113 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:43,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020541073] [2020-10-27 01:31:43,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:43,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 01:31:43,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279848084] [2020-10-27 01:31:43,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 01:31:43,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:43,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 01:31:43,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:31:43,115 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 29 states. [2020-10-27 01:31:45,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:45,155 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2020-10-27 01:31:45,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 01:31:45,156 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 37 [2020-10-27 01:31:45,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:45,157 INFO L225 Difference]: With dead ends: 45 [2020-10-27 01:31:45,157 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 01:31:45,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=234, Invalid=2736, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 01:31:45,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 01:31:45,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-27 01:31:45,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 01:31:45,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-10-27 01:31:45,165 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2020-10-27 01:31:45,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:45,165 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-10-27 01:31:45,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 01:31:45,165 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-10-27 01:31:45,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:31:45,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:45,166 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:45,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:31:45,166 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:45,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:45,166 INFO L82 PathProgramCache]: Analyzing trace with hash -358397641, now seen corresponding path program 26 times [2020-10-27 01:31:45,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:45,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178617272] [2020-10-27 01:31:45,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:45,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:45,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:45,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:46,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:46,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:31:46,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:46,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1630 [2020-10-27 01:31:46,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:46,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 01:31:46,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:46,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:31:46,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:47,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:47,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:47,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:47,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:47,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:47,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:47,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:31:47,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:47,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:47,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:47,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:47,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:47,593 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:47,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178617272] [2020-10-27 01:31:47,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:47,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 01:31:47,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839059853] [2020-10-27 01:31:47,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 01:31:47,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:47,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 01:31:47,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:31:47,595 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 30 states. [2020-10-27 01:31:49,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:49,791 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-10-27 01:31:49,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 01:31:49,791 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 38 [2020-10-27 01:31:49,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:49,792 INFO L225 Difference]: With dead ends: 46 [2020-10-27 01:31:49,792 INFO L226 Difference]: Without dead ends: 40 [2020-10-27 01:31:49,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=243, Invalid=2949, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 01:31:49,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-27 01:31:49,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-27 01:31:49,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 01:31:49,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-10-27 01:31:49,800 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2020-10-27 01:31:49,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:49,800 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-10-27 01:31:49,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 01:31:49,800 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-10-27 01:31:49,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:31:49,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:49,801 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:49,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:31:49,801 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:49,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:49,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1390104162, now seen corresponding path program 27 times [2020-10-27 01:31:49,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:49,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668315092] [2020-10-27 01:31:49,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:49,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:49,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:49,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:51,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:51,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:31:51,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:51,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1785 [2020-10-27 01:31:51,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:51,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 01:31:51,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:51,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:31:51,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:52,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:52,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:52,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:52,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:52,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:52,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:52,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:31:52,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:52,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:52,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:52,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:52,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:52,466 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:52,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668315092] [2020-10-27 01:31:52,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:52,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 01:31:52,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904492712] [2020-10-27 01:31:52,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 01:31:52,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:52,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 01:31:52,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:31:52,468 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 31 states. [2020-10-27 01:31:54,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:54,842 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-10-27 01:31:54,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 01:31:54,843 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 39 [2020-10-27 01:31:54,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:54,844 INFO L225 Difference]: With dead ends: 47 [2020-10-27 01:31:54,844 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 01:31:54,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=252, Invalid=3170, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 01:31:54,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 01:31:54,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-27 01:31:54,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 01:31:54,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-10-27 01:31:54,854 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2020-10-27 01:31:54,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:54,854 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-10-27 01:31:54,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 01:31:54,854 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-10-27 01:31:54,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:31:54,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:54,855 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:54,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:31:54,855 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:54,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:54,855 INFO L82 PathProgramCache]: Analyzing trace with hash 986732055, now seen corresponding path program 28 times [2020-10-27 01:31:54,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:54,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005470367] [2020-10-27 01:31:54,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:54,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:54,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:54,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:56,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:56,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:31:56,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:56,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1989 [2020-10-27 01:31:56,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:56,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 01:31:56,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:56,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:31:56,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:57,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:57,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:57,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:57,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:57,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:57,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:57,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:31:57,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:57,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:57,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:57,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:57,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:57,753 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:57,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005470367] [2020-10-27 01:31:57,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:57,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 01:31:57,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097128990] [2020-10-27 01:31:57,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 01:31:57,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:57,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 01:31:57,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2020-10-27 01:31:57,756 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 32 states. [2020-10-27 01:32:00,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:00,245 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-10-27 01:32:00,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 01:32:00,246 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 40 [2020-10-27 01:32:00,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:00,246 INFO L225 Difference]: With dead ends: 48 [2020-10-27 01:32:00,247 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 01:32:00,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=261, Invalid=3399, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 01:32:00,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 01:32:00,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-27 01:32:00,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 01:32:00,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-10-27 01:32:00,255 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2020-10-27 01:32:00,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:00,255 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-10-27 01:32:00,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 01:32:00,255 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-10-27 01:32:00,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:32:00,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:00,256 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:00,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:32:00,256 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:00,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:00,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1654210750, now seen corresponding path program 29 times [2020-10-27 01:32:00,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:00,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1484507547] [2020-10-27 01:32:00,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:00,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:00,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:00,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:02,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:02,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 01:32:02,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:32:02,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2039 [2020-10-27 01:32:02,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:02,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 01:32:02,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:02,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:32:02,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:03,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:03,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:03,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:03,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:03,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:03,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:03,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:32:03,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:03,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:03,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:03,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:03,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:03,214 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:03,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1484507547] [2020-10-27 01:32:03,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:03,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 01:32:03,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178615887] [2020-10-27 01:32:03,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 01:32:03,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:03,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 01:32:03,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:32:03,216 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 33 states. [2020-10-27 01:32:05,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:05,865 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-10-27 01:32:05,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 01:32:05,866 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 41 [2020-10-27 01:32:05,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:05,867 INFO L225 Difference]: With dead ends: 49 [2020-10-27 01:32:05,867 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 01:32:05,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=270, Invalid=3636, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 01:32:05,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 01:32:05,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-27 01:32:05,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 01:32:05,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-10-27 01:32:05,876 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2020-10-27 01:32:05,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:05,876 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-10-27 01:32:05,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 01:32:05,876 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-10-27 01:32:05,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:32:05,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:05,877 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:05,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:32:05,877 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:05,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:05,877 INFO L82 PathProgramCache]: Analyzing trace with hash 871213815, now seen corresponding path program 30 times [2020-10-27 01:32:05,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:05,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947190171] [2020-10-27 01:32:05,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:05,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:05,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:06,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:07,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:07,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 01:32:07,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:32:07,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1559 [2020-10-27 01:32:07,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:07,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 01:32:07,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:07,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:32:07,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:08,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:08,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:08,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:08,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:08,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:08,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:08,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:32:08,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:08,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:08,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:08,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:08,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:08,473 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:08,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947190171] [2020-10-27 01:32:08,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:08,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 01:32:08,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527536312] [2020-10-27 01:32:08,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 01:32:08,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:08,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 01:32:08,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 01:32:08,475 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 34 states. [2020-10-27 01:32:11,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:11,215 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-10-27 01:32:11,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 01:32:11,215 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 42 [2020-10-27 01:32:11,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:11,216 INFO L225 Difference]: With dead ends: 50 [2020-10-27 01:32:11,217 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 01:32:11,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=279, Invalid=3881, Unknown=0, NotChecked=0, Total=4160 [2020-10-27 01:32:11,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 01:32:11,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-27 01:32:11,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 01:32:11,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-10-27 01:32:11,226 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2020-10-27 01:32:11,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:11,226 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-10-27 01:32:11,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 01:32:11,226 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-10-27 01:32:11,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 01:32:11,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:11,227 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:11,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:32:11,227 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:11,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:11,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1926854690, now seen corresponding path program 31 times [2020-10-27 01:32:11,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:11,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402938987] [2020-10-27 01:32:11,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:11,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:11,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:11,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:13,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:13,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 01:32:13,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:32:13,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1983 [2020-10-27 01:32:13,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:13,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 01:32:13,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:13,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 01:32:13,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:14,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:14,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:14,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:14,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:14,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:14,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:14,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:32:14,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:14,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:14,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:14,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:14,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:14,338 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:14,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402938987] [2020-10-27 01:32:14,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:14,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 01:32:14,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588858978] [2020-10-27 01:32:14,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 01:32:14,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:14,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 01:32:14,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:32:14,340 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 35 states. [2020-10-27 01:32:17,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:17,237 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-10-27 01:32:17,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 01:32:17,238 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 43 [2020-10-27 01:32:17,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:17,239 INFO L225 Difference]: With dead ends: 51 [2020-10-27 01:32:17,239 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 01:32:17,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=288, Invalid=4134, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 01:32:17,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 01:32:17,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-27 01:32:17,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 01:32:17,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-10-27 01:32:17,248 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2020-10-27 01:32:17,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:17,249 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-10-27 01:32:17,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 01:32:17,249 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-10-27 01:32:17,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 01:32:17,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:17,249 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:17,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 01:32:17,250 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:17,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:17,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1527334871, now seen corresponding path program 32 times [2020-10-27 01:32:17,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:17,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957871689] [2020-10-27 01:32:17,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:17,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:17,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:17,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:19,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:19,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 01:32:19,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:32:19,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2407 [2020-10-27 01:32:19,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:19,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 01:32:19,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:19,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 01:32:19,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:20,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:20,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:20,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:20,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:20,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:20,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:20,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:32:20,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:20,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:20,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:20,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:20,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:20,801 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:20,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957871689] [2020-10-27 01:32:20,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:20,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 01:32:20,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390138543] [2020-10-27 01:32:20,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 01:32:20,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:20,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 01:32:20,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 01:32:20,803 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 36 states. [2020-10-27 01:32:23,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:23,897 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-10-27 01:32:23,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 01:32:23,897 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 44 [2020-10-27 01:32:23,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:23,898 INFO L225 Difference]: With dead ends: 52 [2020-10-27 01:32:23,898 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 01:32:23,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=297, Invalid=4395, Unknown=0, NotChecked=0, Total=4692 [2020-10-27 01:32:23,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 01:32:23,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-27 01:32:23,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 01:32:23,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-10-27 01:32:23,907 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2020-10-27 01:32:23,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:23,907 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-10-27 01:32:23,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 01:32:23,908 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-10-27 01:32:23,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 01:32:23,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:23,908 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:23,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 01:32:23,908 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:23,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:23,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1233028862, now seen corresponding path program 33 times [2020-10-27 01:32:23,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:23,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661469986] [2020-10-27 01:32:23,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:23,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:23,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:23,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:26,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:26,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 01:32:26,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:32:26,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3067 [2020-10-27 01:32:26,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:26,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 01:32:26,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:26,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 01:32:26,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:28,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:28,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:28,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:28,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:28,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:28,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:28,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:32:28,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:28,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:28,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:28,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:28,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:28,233 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:28,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661469986] [2020-10-27 01:32:28,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:28,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 01:32:28,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043816628] [2020-10-27 01:32:28,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 01:32:28,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:28,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 01:32:28,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:32:28,235 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 37 states. [2020-10-27 01:32:31,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:31,482 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-10-27 01:32:31,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 01:32:31,482 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 45 [2020-10-27 01:32:31,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:31,483 INFO L225 Difference]: With dead ends: 53 [2020-10-27 01:32:31,483 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 01:32:31,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=306, Invalid=4664, Unknown=0, NotChecked=0, Total=4970 [2020-10-27 01:32:31,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 01:32:31,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-27 01:32:31,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 01:32:31,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-10-27 01:32:31,490 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2020-10-27 01:32:31,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:31,490 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-10-27 01:32:31,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 01:32:31,490 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-10-27 01:32:31,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 01:32:31,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:31,491 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:31,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 01:32:31,491 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:31,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:31,491 INFO L82 PathProgramCache]: Analyzing trace with hash 699477175, now seen corresponding path program 34 times [2020-10-27 01:32:31,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:31,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164159119] [2020-10-27 01:32:31,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:31,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:31,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:31,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:34,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:34,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 01:32:34,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:32:34,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2659 [2020-10-27 01:32:34,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:34,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 01:32:34,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:34,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 01:32:34,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:35,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:35,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:35,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:35,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:35,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:35,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:35,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:32:35,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:35,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:35,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:35,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:35,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:35,460 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:35,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164159119] [2020-10-27 01:32:35,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:35,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 01:32:35,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066600122] [2020-10-27 01:32:35,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 01:32:35,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:35,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 01:32:35,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 01:32:35,461 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 38 states. [2020-10-27 01:32:38,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:38,730 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-10-27 01:32:38,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 01:32:38,731 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 46 [2020-10-27 01:32:38,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:38,731 INFO L225 Difference]: With dead ends: 54 [2020-10-27 01:32:38,731 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 01:32:38,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=315, Invalid=4941, Unknown=0, NotChecked=0, Total=5256 [2020-10-27 01:32:38,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 01:32:38,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-27 01:32:38,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 01:32:38,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-10-27 01:32:38,739 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2020-10-27 01:32:38,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:38,739 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-10-27 01:32:38,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 01:32:38,740 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-10-27 01:32:38,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 01:32:38,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:38,741 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:38,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 01:32:38,741 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:38,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:38,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1339244062, now seen corresponding path program 35 times [2020-10-27 01:32:38,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:38,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [189031916] [2020-10-27 01:32:38,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:38,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:38,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:38,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:41,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:41,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 01:32:41,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:32:41,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2343 [2020-10-27 01:32:41,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:41,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 01:32:41,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:41,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 01:32:41,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:42,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:42,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:42,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:42,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:42,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:42,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:42,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:32:42,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:42,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:42,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:42,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:42,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:42,421 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:42,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [189031916] [2020-10-27 01:32:42,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:42,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 01:32:42,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895896745] [2020-10-27 01:32:42,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 01:32:42,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:42,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 01:32:42,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:32:42,423 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 39 states. [2020-10-27 01:32:46,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:46,000 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2020-10-27 01:32:46,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 01:32:46,001 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 47 [2020-10-27 01:32:46,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:46,002 INFO L225 Difference]: With dead ends: 55 [2020-10-27 01:32:46,002 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 01:32:46,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=324, Invalid=5226, Unknown=0, NotChecked=0, Total=5550 [2020-10-27 01:32:46,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 01:32:46,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-27 01:32:46,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 01:32:46,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-10-27 01:32:46,010 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2020-10-27 01:32:46,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:46,010 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-10-27 01:32:46,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 01:32:46,010 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-10-27 01:32:46,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:32:46,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:46,010 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:46,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 01:32:46,011 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:46,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:46,011 INFO L82 PathProgramCache]: Analyzing trace with hash -302818921, now seen corresponding path program 36 times [2020-10-27 01:32:46,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:46,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570642239] [2020-10-27 01:32:46,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:46,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:46,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:46,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:48,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:48,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 01:32:48,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:32:48,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1977 [2020-10-27 01:32:48,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:48,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 01:32:48,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:48,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 01:32:48,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:49,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:49,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:49,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:49,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:49,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:49,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:49,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:32:49,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:49,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:49,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:49,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:49,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:49,469 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:49,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570642239] [2020-10-27 01:32:49,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:49,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 01:32:49,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066260330] [2020-10-27 01:32:49,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 01:32:49,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:49,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 01:32:49,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 01:32:49,472 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 40 states. [2020-10-27 01:32:53,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:53,210 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-10-27 01:32:53,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 01:32:53,210 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 48 [2020-10-27 01:32:53,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:53,211 INFO L225 Difference]: With dead ends: 56 [2020-10-27 01:32:53,211 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 01:32:53,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=333, Invalid=5519, Unknown=0, NotChecked=0, Total=5852 [2020-10-27 01:32:53,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 01:32:53,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-27 01:32:53,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 01:32:53,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2020-10-27 01:32:53,217 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2020-10-27 01:32:53,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:53,217 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2020-10-27 01:32:53,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 01:32:53,217 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2020-10-27 01:32:53,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 01:32:53,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:53,218 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:53,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 01:32:53,218 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:53,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:53,219 INFO L82 PathProgramCache]: Analyzing trace with hash 332836158, now seen corresponding path program 37 times [2020-10-27 01:32:53,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:53,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544282193] [2020-10-27 01:32:53,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:53,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:53,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:53,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:56,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:56,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 01:32:56,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:32:56,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3232 [2020-10-27 01:32:56,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:56,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 01:32:56,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:56,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 01:32:56,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:57,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:57,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:57,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:57,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:57,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:57,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:57,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:32:57,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:57,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:57,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:57,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:57,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:57,937 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:57,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544282193] [2020-10-27 01:32:57,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:57,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 01:32:57,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703787079] [2020-10-27 01:32:57,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 01:32:57,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:57,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 01:32:57,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:32:57,938 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 41 states. [2020-10-27 01:33:01,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:01,882 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2020-10-27 01:33:01,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 01:33:01,883 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 49 [2020-10-27 01:33:01,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:01,883 INFO L225 Difference]: With dead ends: 57 [2020-10-27 01:33:01,884 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 01:33:01,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=342, Invalid=5820, Unknown=0, NotChecked=0, Total=6162 [2020-10-27 01:33:01,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 01:33:01,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-27 01:33:01,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 01:33:01,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-10-27 01:33:01,894 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2020-10-27 01:33:01,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:01,894 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-10-27 01:33:01,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 01:33:01,894 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-10-27 01:33:01,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 01:33:01,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:01,895 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:01,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 01:33:01,895 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:01,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:01,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1436692873, now seen corresponding path program 38 times [2020-10-27 01:33:01,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:01,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1365083053] [2020-10-27 01:33:01,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:01,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:01,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:02,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:04,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:04,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 01:33:04,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:33:04,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2204 [2020-10-27 01:33:04,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:04,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 01:33:04,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:04,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 01:33:04,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:05,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:05,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:05,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:05,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:05,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:05,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:05,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:33:05,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:05,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:05,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:05,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:05,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:05,631 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:05,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1365083053] [2020-10-27 01:33:05,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:05,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 01:33:05,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814881402] [2020-10-27 01:33:05,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 01:33:05,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:05,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 01:33:05,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 01:33:05,633 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 42 states. [2020-10-27 01:33:09,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:09,737 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-10-27 01:33:09,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 01:33:09,737 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 50 [2020-10-27 01:33:09,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:09,738 INFO L225 Difference]: With dead ends: 58 [2020-10-27 01:33:09,738 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 01:33:09,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=351, Invalid=6129, Unknown=0, NotChecked=0, Total=6480 [2020-10-27 01:33:09,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 01:33:09,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-27 01:33:09,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 01:33:09,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-10-27 01:33:09,747 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2020-10-27 01:33:09,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:09,748 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-10-27 01:33:09,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 01:33:09,748 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-10-27 01:33:09,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 01:33:09,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:09,748 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:09,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 01:33:09,749 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:09,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:09,749 INFO L82 PathProgramCache]: Analyzing trace with hash -457517986, now seen corresponding path program 39 times [2020-10-27 01:33:09,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:09,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460363441] [2020-10-27 01:33:09,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:09,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:09,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:09,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:13,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:13,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 01:33:13,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:33:13,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3274 [2020-10-27 01:33:13,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:13,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 01:33:13,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:13,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 01:33:13,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:14,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:14,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:14,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:14,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:14,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:14,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:14,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:33:14,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:14,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:14,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:14,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:14,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:14,634 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:14,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460363441] [2020-10-27 01:33:14,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:14,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 01:33:14,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109556658] [2020-10-27 01:33:14,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 01:33:14,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:14,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 01:33:14,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:33:14,635 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 43 states. [2020-10-27 01:33:18,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:18,829 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2020-10-27 01:33:18,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 01:33:18,830 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 51 [2020-10-27 01:33:18,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:18,830 INFO L225 Difference]: With dead ends: 59 [2020-10-27 01:33:18,831 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 01:33:18,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=360, Invalid=6446, Unknown=0, NotChecked=0, Total=6806 [2020-10-27 01:33:18,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 01:33:18,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-27 01:33:18,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 01:33:18,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-10-27 01:33:18,839 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2020-10-27 01:33:18,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:18,839 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-10-27 01:33:18,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 01:33:18,839 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-10-27 01:33:18,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 01:33:18,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:18,840 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:18,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 01:33:18,840 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:18,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:18,840 INFO L82 PathProgramCache]: Analyzing trace with hash -167867561, now seen corresponding path program 40 times [2020-10-27 01:33:18,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:18,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894524773] [2020-10-27 01:33:18,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:18,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:18,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:18,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:22,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:22,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 01:33:22,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:33:22,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3193 [2020-10-27 01:33:22,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:22,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 01:33:22,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:22,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 01:33:22,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:23,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:23,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:23,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:23,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:23,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:23,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:23,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:33:23,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:23,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:23,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:23,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:23,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:23,752 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:23,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894524773] [2020-10-27 01:33:23,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:23,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 01:33:23,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494430628] [2020-10-27 01:33:23,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 01:33:23,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:23,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 01:33:23,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 01:33:23,753 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 44 states. [2020-10-27 01:33:28,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:28,281 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-10-27 01:33:28,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 01:33:28,281 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 52 [2020-10-27 01:33:28,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:28,282 INFO L225 Difference]: With dead ends: 60 [2020-10-27 01:33:28,282 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 01:33:28,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=369, Invalid=6771, Unknown=0, NotChecked=0, Total=7140 [2020-10-27 01:33:28,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 01:33:28,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-27 01:33:28,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 01:33:28,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-10-27 01:33:28,289 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2020-10-27 01:33:28,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:28,289 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-10-27 01:33:28,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-27 01:33:28,289 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-10-27 01:33:28,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 01:33:28,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:28,290 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:28,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 01:33:28,290 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:28,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:28,290 INFO L82 PathProgramCache]: Analyzing trace with hash 221361022, now seen corresponding path program 41 times [2020-10-27 01:33:28,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:28,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334514914] [2020-10-27 01:33:28,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:28,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:28,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:28,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:32,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:32,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 01:33:32,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:33:32,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4256 [2020-10-27 01:33:32,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:32,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-27 01:33:32,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:32,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 01:33:32,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:34,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:34,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:34,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:34,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:34,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:34,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:34,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:33:34,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:34,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:34,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:34,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:34,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:34,363 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:34,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334514914] [2020-10-27 01:33:34,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:34,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-27 01:33:34,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390515789] [2020-10-27 01:33:34,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-27 01:33:34,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:34,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-27 01:33:34,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1852, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:33:34,365 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 45 states. [2020-10-27 01:33:39,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:39,066 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2020-10-27 01:33:39,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-27 01:33:39,067 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 53 [2020-10-27 01:33:39,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:39,068 INFO L225 Difference]: With dead ends: 61 [2020-10-27 01:33:39,068 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 01:33:39,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=378, Invalid=7104, Unknown=0, NotChecked=0, Total=7482 [2020-10-27 01:33:39,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 01:33:39,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-27 01:33:39,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 01:33:39,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-10-27 01:33:39,075 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2020-10-27 01:33:39,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:39,076 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-10-27 01:33:39,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-27 01:33:39,076 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-10-27 01:33:39,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 01:33:39,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:39,077 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:39,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 01:33:39,077 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:39,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:39,077 INFO L82 PathProgramCache]: Analyzing trace with hash -597454793, now seen corresponding path program 42 times [2020-10-27 01:33:39,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:39,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377897085] [2020-10-27 01:33:39,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:39,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:39,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:40,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:42,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:42,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 01:33:42,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:33:42,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3194 [2020-10-27 01:33:42,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:42,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-27 01:33:42,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:42,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 01:33:42,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:44,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:44,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:44,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:44,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:44,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:44,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:44,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:33:44,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:44,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:44,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:44,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:44,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:44,142 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:44,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377897085] [2020-10-27 01:33:44,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:44,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-27 01:33:44,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904225876] [2020-10-27 01:33:44,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-27 01:33:44,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:44,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-27 01:33:44,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1939, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 01:33:44,144 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 46 states. [2020-10-27 01:33:48,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:48,978 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-10-27 01:33:48,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 01:33:48,979 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 54 [2020-10-27 01:33:48,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:48,980 INFO L225 Difference]: With dead ends: 62 [2020-10-27 01:33:48,980 INFO L226 Difference]: Without dead ends: 56 [2020-10-27 01:33:48,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=387, Invalid=7445, Unknown=0, NotChecked=0, Total=7832 [2020-10-27 01:33:48,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-27 01:33:48,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-27 01:33:48,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 01:33:48,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-10-27 01:33:48,988 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2020-10-27 01:33:48,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:48,989 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-10-27 01:33:48,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-27 01:33:48,989 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-10-27 01:33:48,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 01:33:48,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:48,989 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:48,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 01:33:48,989 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:48,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:48,990 INFO L82 PathProgramCache]: Analyzing trace with hash -210941282, now seen corresponding path program 43 times [2020-10-27 01:33:48,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:48,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102591295] [2020-10-27 01:33:48,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:49,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:49,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:49,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:53,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:53,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 01:33:53,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:33:53,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4136 [2020-10-27 01:33:53,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:53,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-27 01:33:53,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:53,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 01:33:53,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:55,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:55,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:55,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:55,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:55,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:55,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:55,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:33:55,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:55,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:55,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:55,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:55,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:55,065 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:55,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102591295] [2020-10-27 01:33:55,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:55,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-27 01:33:55,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66173285] [2020-10-27 01:33:55,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-27 01:33:55,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:55,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-27 01:33:55,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2028, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:33:55,067 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 47 states. [2020-10-27 01:34:00,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:00,025 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2020-10-27 01:34:00,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-27 01:34:00,026 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 55 [2020-10-27 01:34:00,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:00,027 INFO L225 Difference]: With dead ends: 63 [2020-10-27 01:34:00,027 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 01:34:00,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=396, Invalid=7794, Unknown=0, NotChecked=0, Total=8190 [2020-10-27 01:34:00,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 01:34:00,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-27 01:34:00,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 01:34:00,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-10-27 01:34:00,035 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2020-10-27 01:34:00,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:00,035 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-10-27 01:34:00,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-27 01:34:00,035 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-10-27 01:34:00,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 01:34:00,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:00,035 INFO L422 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:00,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 01:34:00,036 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:00,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:00,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1113924329, now seen corresponding path program 44 times [2020-10-27 01:34:00,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:00,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517455491] [2020-10-27 01:34:00,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:00,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:00,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:00,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:03,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:03,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 01:34:03,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:34:03,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3738 [2020-10-27 01:34:03,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:03,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-27 01:34:03,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:03,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 01:34:03,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:05,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:05,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:05,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:05,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:05,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:05,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:05,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:34:05,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:05,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:05,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:05,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:05,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:05,860 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:05,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517455491] [2020-10-27 01:34:05,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:05,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-27 01:34:05,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173213257] [2020-10-27 01:34:05,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-27 01:34:05,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:05,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-27 01:34:05,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2119, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 01:34:05,862 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 48 states. [2020-10-27 01:34:11,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:11,261 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-10-27 01:34:11,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-27 01:34:11,262 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 56 [2020-10-27 01:34:11,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:11,263 INFO L225 Difference]: With dead ends: 64 [2020-10-27 01:34:11,263 INFO L226 Difference]: Without dead ends: 58 [2020-10-27 01:34:11,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=405, Invalid=8151, Unknown=0, NotChecked=0, Total=8556 [2020-10-27 01:34:11,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-27 01:34:11,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-27 01:34:11,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 01:34:11,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2020-10-27 01:34:11,270 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2020-10-27 01:34:11,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:11,271 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2020-10-27 01:34:11,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-27 01:34:11,271 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2020-10-27 01:34:11,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 01:34:11,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:11,271 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:11,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 01:34:11,272 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:11,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:11,272 INFO L82 PathProgramCache]: Analyzing trace with hash 958372286, now seen corresponding path program 45 times [2020-10-27 01:34:11,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:11,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668165752] [2020-10-27 01:34:11,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:11,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:11,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:11,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:16,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:16,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 01:34:16,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:34:16,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-27 01:34:16,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:16,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-27 01:34:16,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:16,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 01:34:16,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:18,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:18,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:18,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:18,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:18,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:18,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:18,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:34:18,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:18,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:18,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:18,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:18,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:18,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:18,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668165752] [2020-10-27 01:34:18,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:18,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-27 01:34:18,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257878156] [2020-10-27 01:34:18,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-27 01:34:18,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:18,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-27 01:34:18,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2212, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:34:18,517 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 49 states. [2020-10-27 01:34:24,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:24,130 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-10-27 01:34:24,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-27 01:34:24,131 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 57 [2020-10-27 01:34:24,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:24,132 INFO L225 Difference]: With dead ends: 65 [2020-10-27 01:34:24,132 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 01:34:24,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=414, Invalid=8516, Unknown=0, NotChecked=0, Total=8930 [2020-10-27 01:34:24,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 01:34:24,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-27 01:34:24,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-27 01:34:24,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-10-27 01:34:24,142 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2020-10-27 01:34:24,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:24,142 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-10-27 01:34:24,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-27 01:34:24,143 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-10-27 01:34:24,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 01:34:24,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:24,143 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:24,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 01:34:24,143 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:24,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:24,144 INFO L82 PathProgramCache]: Analyzing trace with hash 775057911, now seen corresponding path program 46 times [2020-10-27 01:34:24,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:24,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829299288] [2020-10-27 01:34:24,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:24,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:24,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:24,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:29,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:29,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 01:34:29,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:34:29,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 01:34:29,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:29,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-27 01:34:29,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:29,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 01:34:29,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:31,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:31,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:31,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:31,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:31,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:31,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:31,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:34:31,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:31,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:31,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:31,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:31,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:31,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:31,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829299288] [2020-10-27 01:34:31,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:31,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-27 01:34:31,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113863658] [2020-10-27 01:34:31,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-27 01:34:31,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:31,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-27 01:34:31,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2307, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 01:34:31,357 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 50 states. [2020-10-27 01:34:37,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:37,181 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-10-27 01:34:37,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-27 01:34:37,182 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 58 [2020-10-27 01:34:37,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:37,183 INFO L225 Difference]: With dead ends: 66 [2020-10-27 01:34:37,183 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 01:34:37,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=423, Invalid=8889, Unknown=0, NotChecked=0, Total=9312 [2020-10-27 01:34:37,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 01:34:37,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-27 01:34:37,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-27 01:34:37,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2020-10-27 01:34:37,193 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2020-10-27 01:34:37,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:37,193 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2020-10-27 01:34:37,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-27 01:34:37,193 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2020-10-27 01:34:37,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 01:34:37,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:37,194 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:37,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 01:34:37,194 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:37,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:37,194 INFO L82 PathProgramCache]: Analyzing trace with hash -612720418, now seen corresponding path program 47 times [2020-10-27 01:34:37,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:37,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493374555] [2020-10-27 01:34:37,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:37,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:37,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:37,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:42,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:42,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 01:34:42,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:34:42,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 01:34:42,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:42,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-27 01:34:42,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:42,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 01:34:42,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0