/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-crafted/zero_sum5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:07:34,112 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:07:34,116 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:07:34,154 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:07:34,155 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:07:34,156 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:07:34,158 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:07:34,160 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:07:34,163 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:07:34,164 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:07:34,165 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:07:34,166 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:07:34,167 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:07:34,168 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:07:34,170 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:07:34,171 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:07:34,172 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:07:34,173 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:07:34,175 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:07:34,205 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:07:34,208 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:07:34,212 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:07:34,220 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:07:34,221 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:07:34,230 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:07:34,231 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:07:34,234 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:07:34,236 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:07:34,240 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:07:34,242 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:07:34,242 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:07:34,243 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:07:34,244 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:07:34,247 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:07:34,249 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:07:34,250 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:07:34,250 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:07:34,251 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:07:34,251 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:07:34,253 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:07:34,255 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:07:34,256 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 14:07:34,315 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:07:34,316 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:07:34,317 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:07:34,318 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:07:34,318 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:07:34,318 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:07:34,318 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:07:34,319 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:07:34,319 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:07:34,319 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:07:34,319 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:07:34,320 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:07:34,320 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:07:34,320 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:07:34,320 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:07:34,320 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:07:34,321 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:07:34,321 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:07:34,321 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:07:34,321 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:07:34,322 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:07:34,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:07:34,322 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:07:34,322 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:07:34,323 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:07:34,323 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:07:34,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:07:34,323 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:07:34,324 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:07:34,324 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:07:34,711 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:07:34,757 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:07:34,761 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:07:34,763 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:07:34,764 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:07:34,765 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum5.c [2020-10-27 14:07:34,852 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4cca882ca/3231dbc86dfc42a7837887ba3f674268/FLAG8f3149a4b [2020-10-27 14:07:35,451 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:07:35,452 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum5.c [2020-10-27 14:07:35,467 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4cca882ca/3231dbc86dfc42a7837887ba3f674268/FLAG8f3149a4b [2020-10-27 14:07:35,810 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4cca882ca/3231dbc86dfc42a7837887ba3f674268 [2020-10-27 14:07:35,815 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:07:35,823 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:07:35,825 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:07:35,825 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:07:35,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:07:35,831 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:07:35" (1/1) ... [2020-10-27 14:07:35,835 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e4918ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:35, skipping insertion in model container [2020-10-27 14:07:35,835 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:07:35" (1/1) ... [2020-10-27 14:07:35,844 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:07:35,874 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:07:36,068 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:07:36,078 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:07:36,115 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:07:36,154 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:07:36,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:36 WrapperNode [2020-10-27 14:07:36,154 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:07:36,156 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:07:36,156 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:07:36,156 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:07:36,181 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:36" (1/1) ... [2020-10-27 14:07:36,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:36" (1/1) ... [2020-10-27 14:07:36,205 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:36" (1/1) ... [2020-10-27 14:07:36,206 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:36" (1/1) ... [2020-10-27 14:07:36,238 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:36" (1/1) ... [2020-10-27 14:07:36,255 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:36" (1/1) ... [2020-10-27 14:07:36,262 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:36" (1/1) ... [2020-10-27 14:07:36,267 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:07:36,269 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:07:36,269 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:07:36,269 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:07:36,270 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:36" (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 14:07:36,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:07:36,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:07:36,359 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:07:36,360 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 14:07:36,360 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:07:36,361 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:07:36,362 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:07:36,362 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:07:36,362 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:07:36,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:07:36,364 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 14:07:36,364 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:07:36,365 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2020-10-27 14:07:36,365 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:07:36,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:07:36,366 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:07:36,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:07:36,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:07:36,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:07:36,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:07:37,040 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:07:37,041 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-27 14:07:37,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:07:37 BoogieIcfgContainer [2020-10-27 14:07:37,043 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:07:37,045 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:07:37,045 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:07:37,049 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:07:37,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:07:35" (1/3) ... [2020-10-27 14:07:37,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@161ca6c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:07:37, skipping insertion in model container [2020-10-27 14:07:37,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:36" (2/3) ... [2020-10-27 14:07:37,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@161ca6c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:07:37, skipping insertion in model container [2020-10-27 14:07:37,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:07:37" (3/3) ... [2020-10-27 14:07:37,053 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum5.c [2020-10-27 14:07:37,066 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:07:37,071 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:07:37,086 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:07:37,115 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:07:37,115 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:07:37,115 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:07:37,115 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:07:37,116 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:07:37,116 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:07:37,116 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:07:37,116 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:07:37,134 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-10-27 14:07:37,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 14:07:37,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:37,152 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:07:37,152 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:37,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:37,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1682014752, now seen corresponding path program 1 times [2020-10-27 14:07:37,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:37,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836551598] [2020-10-27 14:07:37,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:37,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:37,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:37,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:37,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:37,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:37,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:37,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:37,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:37,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:37,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:38,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:38,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:39,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:42,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:42,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 14:07:42,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 14:07:42,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:07:42,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:42,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:42,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:07:42,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:42,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:07:42,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:42,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:42,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:42,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:42,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:42,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:42,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:07:42,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:42,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:42,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:42,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:42,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:42,465 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 14:07:42,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836551598] [2020-10-27 14:07:42,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:07:42,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 14:07:42,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363274955] [2020-10-27 14:07:42,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 14:07:42,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:42,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 14:07:42,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:07:42,496 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 3 states. [2020-10-27 14:07:42,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:42,777 INFO L93 Difference]: Finished difference Result 100 states and 145 transitions. [2020-10-27 14:07:42,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 14:07:42,779 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-10-27 14:07:42,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:42,791 INFO L225 Difference]: With dead ends: 100 [2020-10-27 14:07:42,791 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 14:07:42,796 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 14:07:42,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 14:07:42,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-27 14:07:42,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 14:07:42,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2020-10-27 14:07:42,851 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 33 [2020-10-27 14:07:42,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:42,852 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2020-10-27 14:07:42,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 14:07:42,852 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2020-10-27 14:07:42,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 14:07:42,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:42,854 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:07:42,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:07:42,855 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:42,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:42,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1226635186, now seen corresponding path program 1 times [2020-10-27 14:07:42,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:42,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740750855] [2020-10-27 14:07:42,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:42,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:42,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:42,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:42,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:42,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:42,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:42,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:43,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:43,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:43,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:43,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:45,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:47,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:47,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 14:07:47,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 14:07:47,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 14:07:47,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:47,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:07:47,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:07:47,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:07:47,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:07:48,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:48,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:48,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:48,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:48,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:48,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:48,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:07:48,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:48,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:48,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:48,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:48,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:07:48,026 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 14:07:48,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740750855] [2020-10-27 14:07:48,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:07:48,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 14:07:48,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135569704] [2020-10-27 14:07:48,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:07:48,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:48,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:07:48,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:07:48,032 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand 5 states. [2020-10-27 14:07:48,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:48,469 INFO L93 Difference]: Finished difference Result 98 states and 126 transitions. [2020-10-27 14:07:48,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:07:48,470 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-10-27 14:07:48,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:48,471 INFO L225 Difference]: With dead ends: 98 [2020-10-27 14:07:48,472 INFO L226 Difference]: Without dead ends: 65 [2020-10-27 14:07:48,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:07:48,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-27 14:07:48,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2020-10-27 14:07:48,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 14:07:48,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2020-10-27 14:07:48,487 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 33 [2020-10-27 14:07:48,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:48,488 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2020-10-27 14:07:48,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:07:48,488 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2020-10-27 14:07:48,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 14:07:48,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:48,492 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:07:48,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:07:48,492 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:48,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:48,493 INFO L82 PathProgramCache]: Analyzing trace with hash 419710214, now seen corresponding path program 1 times [2020-10-27 14:07:48,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:48,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643891555] [2020-10-27 14:07:48,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:48,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:48,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:48,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:48,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:48,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:48,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:48,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:48,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:49,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:51,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:53,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:53,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 14:07:53,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:07:53,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:07:53,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:53,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:07:53,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:07:53,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 14:07:53,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:53,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:53,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:53,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:53,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:53,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:53,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:53,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:07:53,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:53,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:53,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:53,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:53,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:53,629 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-27 14:07:53,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643891555] [2020-10-27 14:07:53,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:07:53,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:07:53,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321883438] [2020-10-27 14:07:53,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:07:53,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:53,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:07:53,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:07:53,638 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand 4 states. [2020-10-27 14:07:53,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:53,957 INFO L93 Difference]: Finished difference Result 103 states and 123 transitions. [2020-10-27 14:07:53,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:07:53,958 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-10-27 14:07:53,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:53,959 INFO L225 Difference]: With dead ends: 103 [2020-10-27 14:07:53,960 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 14:07:53,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:07:53,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 14:07:53,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-27 14:07:53,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 14:07:53,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2020-10-27 14:07:53,983 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 53 [2020-10-27 14:07:53,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:53,984 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2020-10-27 14:07:53,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:07:53,984 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2020-10-27 14:07:53,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 14:07:53,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:53,989 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:07:53,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:07:53,989 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:53,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:53,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1326801144, now seen corresponding path program 1 times [2020-10-27 14:07:53,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:53,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892712584] [2020-10-27 14:07:53,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:54,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:54,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:54,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:54,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:54,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:54,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:54,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:54,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:54,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:59,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:59,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 14:07:59,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 14:07:59,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:07:59,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:59,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:07:59,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:07:59,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:07:59,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:07:59,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:59,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:59,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:59,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:59,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:59,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:59,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:07:59,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:59,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:59,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:59,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:59,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:59,175 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-27 14:07:59,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892712584] [2020-10-27 14:07:59,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:07:59,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:07:59,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117700378] [2020-10-27 14:07:59,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:07:59,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:59,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:07:59,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:07:59,180 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 6 states. [2020-10-27 14:07:59,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:59,683 INFO L93 Difference]: Finished difference Result 118 states and 146 transitions. [2020-10-27 14:07:59,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:07:59,684 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-27 14:07:59,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:59,686 INFO L225 Difference]: With dead ends: 118 [2020-10-27 14:07:59,686 INFO L226 Difference]: Without dead ends: 76 [2020-10-27 14:07:59,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:07:59,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-27 14:07:59,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-27 14:07:59,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-27 14:07:59,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2020-10-27 14:07:59,705 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 55 [2020-10-27 14:07:59,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:59,706 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2020-10-27 14:07:59,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:07:59,706 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2020-10-27 14:07:59,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 14:07:59,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:59,715 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:07:59,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:07:59,715 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:59,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:59,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1880241500, now seen corresponding path program 2 times [2020-10-27 14:07:59,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:59,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839233315] [2020-10-27 14:07:59,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:59,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:59,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:59,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:00,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:01,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:03,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:04,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:04,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 14:08:04,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:08:04,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 14:08:04,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:04,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-27 14:08:04,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:08:04,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 14:08:04,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:06,257 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2020-10-27 14:08:06,465 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2020-10-27 14:08:09,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:09,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:09,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:09,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:09,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:09,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:09,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 14:08:09,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:09,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:09,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:09,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:09,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:08:09,155 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:08:09,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839233315] [2020-10-27 14:08:09,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:09,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 14:08:09,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406326209] [2020-10-27 14:08:09,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 14:08:09,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:09,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 14:08:09,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1363, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:08:09,159 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand 39 states. [2020-10-27 14:08:10,323 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2020-10-27 14:08:10,834 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 28 [2020-10-27 14:08:11,085 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-10-27 14:08:13,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:13,475 INFO L93 Difference]: Finished difference Result 148 states and 167 transitions. [2020-10-27 14:08:13,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:08:13,476 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 75 [2020-10-27 14:08:13,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:13,478 INFO L225 Difference]: With dead ends: 148 [2020-10-27 14:08:13,479 INFO L226 Difference]: Without dead ends: 142 [2020-10-27 14:08:13,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 6 SyntacticMatches, 8 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=267, Invalid=2489, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 14:08:13,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-27 14:08:13,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 129. [2020-10-27 14:08:13,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-27 14:08:13,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 148 transitions. [2020-10-27 14:08:13,504 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 148 transitions. Word has length 75 [2020-10-27 14:08:13,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:13,504 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 148 transitions. [2020-10-27 14:08:13,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 14:08:13,504 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 148 transitions. [2020-10-27 14:08:13,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 14:08:13,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:13,506 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:13,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:08:13,506 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:13,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:13,507 INFO L82 PathProgramCache]: Analyzing trace with hash -269399394, now seen corresponding path program 3 times [2020-10-27 14:08:13,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:13,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3097726] [2020-10-27 14:08:13,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:13,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:13,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:13,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:13,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:13,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:13,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:13,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:16,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:18,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:18,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 14:08:18,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:08:18,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 14:08:18,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:18,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:08:18,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 14:08:18,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:08:18,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:18,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:18,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:18,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:18,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:18,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:18,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:18,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:08:18,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:18,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:18,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:18,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:18,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:18,686 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-10-27 14:08:18,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3097726] [2020-10-27 14:08:18,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:18,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:08:18,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334612877] [2020-10-27 14:08:18,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:08:18,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:18,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:08:18,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:08:18,689 INFO L87 Difference]: Start difference. First operand 129 states and 148 transitions. Second operand 10 states. [2020-10-27 14:08:19,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:19,621 INFO L93 Difference]: Finished difference Result 204 states and 239 transitions. [2020-10-27 14:08:19,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:08:19,622 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 77 [2020-10-27 14:08:19,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:19,625 INFO L225 Difference]: With dead ends: 204 [2020-10-27 14:08:19,625 INFO L226 Difference]: Without dead ends: 150 [2020-10-27 14:08:19,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:08:19,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-27 14:08:19,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 139. [2020-10-27 14:08:19,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-27 14:08:19,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 157 transitions. [2020-10-27 14:08:19,660 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 157 transitions. Word has length 77 [2020-10-27 14:08:19,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:19,661 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 157 transitions. [2020-10-27 14:08:19,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:08:19,661 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 157 transitions. [2020-10-27 14:08:19,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 14:08:19,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:19,662 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:19,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:08:19,663 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:19,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:19,663 INFO L82 PathProgramCache]: Analyzing trace with hash -836811682, now seen corresponding path program 4 times [2020-10-27 14:08:19,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:19,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [453210974] [2020-10-27 14:08:19,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:19,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:19,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:19,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:19,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:19,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:19,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:19,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:20,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:24,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:24,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 14:08:24,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:08:24,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:08:24,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:24,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:08:24,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-27 14:08:24,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 14:08:24,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:24,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:24,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:24,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:24,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:24,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:24,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:24,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:08:24,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:24,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:24,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:24,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:24,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:24,824 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-10-27 14:08:24,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [453210974] [2020-10-27 14:08:24,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:24,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:08:24,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916559217] [2020-10-27 14:08:24,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:08:24,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:24,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:08:24,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:08:24,826 INFO L87 Difference]: Start difference. First operand 139 states and 157 transitions. Second operand 10 states. [2020-10-27 14:08:25,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:25,394 INFO L93 Difference]: Finished difference Result 232 states and 259 transitions. [2020-10-27 14:08:25,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:08:25,395 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 77 [2020-10-27 14:08:25,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:25,396 INFO L225 Difference]: With dead ends: 232 [2020-10-27 14:08:25,397 INFO L226 Difference]: Without dead ends: 106 [2020-10-27 14:08:25,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:08:25,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-27 14:08:25,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 96. [2020-10-27 14:08:25,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-27 14:08:25,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2020-10-27 14:08:25,430 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 77 [2020-10-27 14:08:25,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:25,430 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2020-10-27 14:08:25,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:08:25,431 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2020-10-27 14:08:25,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-27 14:08:25,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:25,435 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:25,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:08:25,436 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:25,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:25,436 INFO L82 PathProgramCache]: Analyzing trace with hash -2028557904, now seen corresponding path program 5 times [2020-10-27 14:08:25,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:25,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559727091] [2020-10-27 14:08:25,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:25,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:25,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:25,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:27,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:29,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:31,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:31,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-27 14:08:31,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:08:31,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6111 [2020-10-27 14:08:31,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:31,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 68 [2020-10-27 14:08:31,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:08:31,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-27 14:08:31,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:35,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:35,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:35,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:35,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:35,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:35,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:35,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:08:35,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:35,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:35,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:35,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:35,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:35,193 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:08:35,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559727091] [2020-10-27 14:08:35,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:35,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-27 14:08:35,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480204846] [2020-10-27 14:08:35,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-27 14:08:35,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:35,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-27 14:08:35,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2113, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 14:08:35,197 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand 48 states. [2020-10-27 14:08:36,477 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2020-10-27 14:08:37,024 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-10-27 14:08:41,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:41,056 INFO L93 Difference]: Finished difference Result 176 states and 195 transitions. [2020-10-27 14:08:41,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:08:41,057 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 95 [2020-10-27 14:08:41,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:41,059 INFO L225 Difference]: With dead ends: 176 [2020-10-27 14:08:41,059 INFO L226 Difference]: Without dead ends: 170 [2020-10-27 14:08:41,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=276, Invalid=3630, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 14:08:41,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-27 14:08:41,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 165. [2020-10-27 14:08:41,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-27 14:08:41,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 184 transitions. [2020-10-27 14:08:41,087 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 184 transitions. Word has length 95 [2020-10-27 14:08:41,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:41,088 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 184 transitions. [2020-10-27 14:08:41,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-27 14:08:41,088 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 184 transitions. [2020-10-27 14:08:41,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-27 14:08:41,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:41,089 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:41,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:08:41,090 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:41,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:41,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1512588814, now seen corresponding path program 6 times [2020-10-27 14:08:41,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:41,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839108136] [2020-10-27 14:08:41,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:41,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:41,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:41,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:41,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:41,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:41,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:41,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:45,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:46,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:46,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-27 14:08:46,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:08:46,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:08:46,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:46,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:08:46,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-27 14:08:46,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 14:08:46,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:46,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:46,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:46,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:46,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:46,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:46,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:46,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:08:46,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:46,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:46,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:46,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:46,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:46,327 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-10-27 14:08:46,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839108136] [2020-10-27 14:08:46,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:46,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:08:46,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228619186] [2020-10-27 14:08:46,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:08:46,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:46,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:08:46,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:08:46,338 INFO L87 Difference]: Start difference. First operand 165 states and 184 transitions. Second operand 12 states. [2020-10-27 14:08:47,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:47,751 INFO L93 Difference]: Finished difference Result 258 states and 293 transitions. [2020-10-27 14:08:47,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:08:47,752 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 97 [2020-10-27 14:08:47,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:47,753 INFO L225 Difference]: With dead ends: 258 [2020-10-27 14:08:47,753 INFO L226 Difference]: Without dead ends: 188 [2020-10-27 14:08:47,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:08:47,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-27 14:08:47,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 173. [2020-10-27 14:08:47,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-27 14:08:47,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 191 transitions. [2020-10-27 14:08:47,788 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 191 transitions. Word has length 97 [2020-10-27 14:08:47,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:47,789 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 191 transitions. [2020-10-27 14:08:47,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:08:47,790 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 191 transitions. [2020-10-27 14:08:47,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-27 14:08:47,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:47,792 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:47,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:08:47,792 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:47,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:47,793 INFO L82 PathProgramCache]: Analyzing trace with hash 903345074, now seen corresponding path program 7 times [2020-10-27 14:08:47,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:47,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303371937] [2020-10-27 14:08:47,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:47,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:47,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:47,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:47,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:47,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:48,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:48,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:48,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:52,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:52,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-27 14:08:52,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:08:52,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:08:52,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:52,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:08:52,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-27 14:08:52,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 14:08:52,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:52,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:52,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:52,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:52,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:52,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:52,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:52,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:08:52,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:52,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:52,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:52,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:52,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:52,997 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-10-27 14:08:52,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303371937] [2020-10-27 14:08:52,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:52,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:08:52,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589362314] [2020-10-27 14:08:52,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:08:52,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:53,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:08:53,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:08:53,001 INFO L87 Difference]: Start difference. First operand 173 states and 191 transitions. Second operand 12 states. [2020-10-27 14:08:53,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:53,862 INFO L93 Difference]: Finished difference Result 286 states and 313 transitions. [2020-10-27 14:08:53,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:08:53,863 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 97 [2020-10-27 14:08:53,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:53,865 INFO L225 Difference]: With dead ends: 286 [2020-10-27 14:08:53,865 INFO L226 Difference]: Without dead ends: 126 [2020-10-27 14:08:53,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:08:53,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-27 14:08:53,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 116. [2020-10-27 14:08:53,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-27 14:08:53,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2020-10-27 14:08:53,877 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 97 [2020-10-27 14:08:53,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:53,877 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2020-10-27 14:08:53,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:08:53,878 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2020-10-27 14:08:53,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-27 14:08:53,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:53,879 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:53,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:08:53,879 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:53,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:53,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1425603588, now seen corresponding path program 8 times [2020-10-27 14:08:53,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:53,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105699925] [2020-10-27 14:08:53,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:53,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:53,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:54,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:56,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:59,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:59,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-27 14:08:59,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:08:59,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5729 [2020-10-27 14:08:59,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:59,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 87 [2020-10-27 14:08:59,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:08:59,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-27 14:08:59,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:04,107 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2020-10-27 14:09:07,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:09:07,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:07,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:07,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:07,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:09:07,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:09:07,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:09:07,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:07,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:09:07,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:09:07,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:09:07,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:07,366 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 15 proven. 145 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:09:07,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105699925] [2020-10-27 14:09:07,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:09:07,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-10-27 14:09:07,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988975314] [2020-10-27 14:09:07,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-27 14:09:07,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:09:07,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-27 14:09:07,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=4396, Unknown=0, NotChecked=0, Total=4830 [2020-10-27 14:09:07,370 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand 70 states. [2020-10-27 14:09:07,767 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-10-27 14:09:09,115 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 50 [2020-10-27 14:09:09,833 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-27 14:09:10,223 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 67 [2020-10-27 14:09:10,485 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2020-10-27 14:09:10,870 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 67 [2020-10-27 14:09:11,083 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-10-27 14:09:11,406 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2020-10-27 14:09:11,677 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 41 [2020-10-27 14:09:12,156 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2020-10-27 14:09:12,381 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-10-27 14:09:12,693 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 40 [2020-10-27 14:09:13,013 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2020-10-27 14:09:13,846 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2020-10-27 14:09:14,181 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2020-10-27 14:09:14,465 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 47 [2020-10-27 14:09:20,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:09:20,794 INFO L93 Difference]: Finished difference Result 249 states and 277 transitions. [2020-10-27 14:09:20,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-27 14:09:20,795 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 115 [2020-10-27 14:09:20,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:09:20,797 INFO L225 Difference]: With dead ends: 249 [2020-10-27 14:09:20,797 INFO L226 Difference]: Without dead ends: 118 [2020-10-27 14:09:20,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 13 SyntacticMatches, 9 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2721 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=968, Invalid=8152, Unknown=0, NotChecked=0, Total=9120 [2020-10-27 14:09:20,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-27 14:09:20,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2020-10-27 14:09:20,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-27 14:09:20,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 128 transitions. [2020-10-27 14:09:20,814 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 128 transitions. Word has length 115 [2020-10-27 14:09:20,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:09:20,814 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 128 transitions. [2020-10-27 14:09:20,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-10-27 14:09:20,814 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 128 transitions. [2020-10-27 14:09:20,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-27 14:09:20,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:09:20,816 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:09:20,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:09:20,816 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:09:20,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:09:20,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1247594182, now seen corresponding path program 9 times [2020-10-27 14:09:20,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:09:20,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1057266289] [2020-10-27 14:09:20,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:09:20,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:20,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:20,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:20,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:20,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:20,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:21,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:25,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:25,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-27 14:09:25,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:09:25,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:09:25,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:25,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:09:25,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 14:09:25,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 14:09:25,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:26,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:09:26,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:26,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:26,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:26,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:09:26,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:09:26,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:09:26,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:26,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:09:26,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:09:26,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:09:26,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:26,050 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2020-10-27 14:09:26,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1057266289] [2020-10-27 14:09:26,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:09:26,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:09:26,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790251844] [2020-10-27 14:09:26,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:09:26,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:09:26,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:09:26,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:09:26,060 INFO L87 Difference]: Start difference. First operand 118 states and 128 transitions. Second operand 14 states. [2020-10-27 14:09:27,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:09:27,408 INFO L93 Difference]: Finished difference Result 222 states and 248 transitions. [2020-10-27 14:09:27,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:09:27,409 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 117 [2020-10-27 14:09:27,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:09:27,411 INFO L225 Difference]: With dead ends: 222 [2020-10-27 14:09:27,411 INFO L226 Difference]: Without dead ends: 136 [2020-10-27 14:09:27,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:09:27,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-27 14:09:27,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2020-10-27 14:09:27,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-27 14:09:27,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 146 transitions. [2020-10-27 14:09:27,424 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 146 transitions. Word has length 117 [2020-10-27 14:09:27,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:09:27,424 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 146 transitions. [2020-10-27 14:09:27,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:09:27,424 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 146 transitions. [2020-10-27 14:09:27,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-27 14:09:27,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:09:27,425 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:09:27,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:09:27,426 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:09:27,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:09:27,426 INFO L82 PathProgramCache]: Analyzing trace with hash -751162280, now seen corresponding path program 10 times [2020-10-27 14:09:27,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:09:27,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564804948] [2020-10-27 14:09:27,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:09:27,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:27,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:27,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:30,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:33,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:33,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-27 14:09:33,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:09:33,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6266 [2020-10-27 14:09:33,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:33,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 108 [2020-10-27 14:09:33,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:09:33,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-27 14:09:33,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:35,051 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2020-10-27 14:09:36,153 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2020-10-27 14:09:36,348 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 20 [2020-10-27 14:09:41,641 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-10-27 14:09:41,878 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2020-10-27 14:09:51,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:09:51,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:51,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:51,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:51,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:09:51,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:09:51,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:09:51,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:51,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:09:51,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:09:51,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:09:51,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:51,903 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 12 proven. 238 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:09:51,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564804948] [2020-10-27 14:09:51,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:09:51,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99] total 99 [2020-10-27 14:09:51,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710130499] [2020-10-27 14:09:51,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 99 states [2020-10-27 14:09:51,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:09:51,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2020-10-27 14:09:51,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=658, Invalid=9044, Unknown=0, NotChecked=0, Total=9702 [2020-10-27 14:09:51,909 INFO L87 Difference]: Start difference. First operand 136 states and 146 transitions. Second operand 99 states. [2020-10-27 14:09:52,602 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 36 [2020-10-27 14:09:53,334 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2020-10-27 14:09:53,756 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2020-10-27 14:09:54,185 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-10-27 14:09:54,613 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-10-27 14:09:55,236 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2020-10-27 14:09:55,567 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2020-10-27 14:09:57,312 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 43 [2020-10-27 14:09:58,063 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 68 [2020-10-27 14:09:59,410 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 69 [2020-10-27 14:10:00,227 WARN L193 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 78 [2020-10-27 14:10:00,914 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 68 [2020-10-27 14:10:01,673 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 80 [2020-10-27 14:10:03,177 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 17 [2020-10-27 14:10:13,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:10:13,869 INFO L93 Difference]: Finished difference Result 285 states and 312 transitions. [2020-10-27 14:10:13,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-27 14:10:13,871 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 135 [2020-10-27 14:10:13,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:10:13,873 INFO L225 Difference]: With dead ends: 285 [2020-10-27 14:10:13,873 INFO L226 Difference]: Without dead ends: 152 [2020-10-27 14:10:13,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 4 SyntacticMatches, 10 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5312 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=1012, Invalid=13508, Unknown=0, NotChecked=0, Total=14520 [2020-10-27 14:10:13,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-27 14:10:13,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 141. [2020-10-27 14:10:13,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-27 14:10:13,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 152 transitions. [2020-10-27 14:10:13,892 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 152 transitions. Word has length 135 [2020-10-27 14:10:13,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:10:13,893 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 152 transitions. [2020-10-27 14:10:13,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 99 states. [2020-10-27 14:10:13,893 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 152 transitions. [2020-10-27 14:10:13,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-27 14:10:13,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:10:13,895 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:10:13,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:10:13,895 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:10:13,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:10:13,896 INFO L82 PathProgramCache]: Analyzing trace with hash 768780890, now seen corresponding path program 11 times [2020-10-27 14:10:13,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:10:13,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366498795] [2020-10-27 14:10:13,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:10:13,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:13,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:13,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:14,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:14,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:14,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:14,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:18,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:18,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-27 14:10:18,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:10:18,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:10:18,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:18,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:10:18,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 14:10:18,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 14:10:18,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:19,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:10:19,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:19,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:19,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:19,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:10:19,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:10:19,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:10:19,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:19,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:10:19,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:10:19,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:10:19,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:19,296 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2020-10-27 14:10:19,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366498795] [2020-10-27 14:10:19,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:10:19,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:10:19,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949445195] [2020-10-27 14:10:19,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:10:19,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:10:19,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:10:19,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:10:19,300 INFO L87 Difference]: Start difference. First operand 141 states and 152 transitions. Second operand 16 states. [2020-10-27 14:10:21,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:10:21,522 INFO L93 Difference]: Finished difference Result 270 states and 297 transitions. [2020-10-27 14:10:21,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:10:21,523 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 137 [2020-10-27 14:10:21,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:10:21,525 INFO L225 Difference]: With dead ends: 270 [2020-10-27 14:10:21,525 INFO L226 Difference]: Without dead ends: 168 [2020-10-27 14:10:21,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:10:21,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-27 14:10:21,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 154. [2020-10-27 14:10:21,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-27 14:10:21,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 164 transitions. [2020-10-27 14:10:21,539 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 164 transitions. Word has length 137 [2020-10-27 14:10:21,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:10:21,540 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 164 transitions. [2020-10-27 14:10:21,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:10:21,540 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 164 transitions. [2020-10-27 14:10:21,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-27 14:10:21,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:10:21,542 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:10:21,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:10:21,542 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:10:21,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:10:21,543 INFO L82 PathProgramCache]: Analyzing trace with hash 753111402, now seen corresponding path program 12 times [2020-10-27 14:10:21,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:10:21,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424276260] [2020-10-27 14:10:21,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:10:21,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:21,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:21,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:21,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:21,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:21,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:21,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:26,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:26,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-27 14:10:26,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:10:26,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:10:26,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:26,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:10:26,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 14:10:26,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 14:10:26,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:26,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:10:26,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:26,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:26,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:26,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:10:26,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:10:26,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:10:26,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:26,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:10:26,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:10:26,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:10:26,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:26,863 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-27 14:10:26,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424276260] [2020-10-27 14:10:26,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:10:26,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:10:26,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68359108] [2020-10-27 14:10:26,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:10:26,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:10:26,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:10:26,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:10:26,866 INFO L87 Difference]: Start difference. First operand 154 states and 164 transitions. Second operand 16 states. [2020-10-27 14:10:27,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:10:27,995 INFO L93 Difference]: Finished difference Result 298 states and 317 transitions. [2020-10-27 14:10:27,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:10:27,997 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 153 [2020-10-27 14:10:27,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:10:27,998 INFO L225 Difference]: With dead ends: 298 [2020-10-27 14:10:27,999 INFO L226 Difference]: Without dead ends: 166 [2020-10-27 14:10:28,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:10:28,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-27 14:10:28,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 156. [2020-10-27 14:10:28,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-27 14:10:28,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 166 transitions. [2020-10-27 14:10:28,013 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 166 transitions. Word has length 153 [2020-10-27 14:10:28,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:10:28,013 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 166 transitions. [2020-10-27 14:10:28,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:10:28,013 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 166 transitions. [2020-10-27 14:10:28,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-27 14:10:28,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:10:28,015 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:10:28,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:10:28,015 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:10:28,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:10:28,016 INFO L82 PathProgramCache]: Analyzing trace with hash 366688940, now seen corresponding path program 13 times [2020-10-27 14:10:28,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:10:28,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680498583] [2020-10-27 14:10:28,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:10:28,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:28,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:28,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:34,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:34,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-27 14:10:34,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:10:34,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6850 [2020-10-27 14:10:34,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:34,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:10:34,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:10:34,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 14:10:34,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:34,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:10:34,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:34,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:34,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:34,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:10:34,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:10:34,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:10:34,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:34,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:10:34,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:10:34,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:10:34,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:34,983 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2020-10-27 14:10:34,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680498583] [2020-10-27 14:10:34,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:10:34,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 14:10:34,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465004074] [2020-10-27 14:10:34,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:10:34,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:10:34,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:10:34,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:10:34,986 INFO L87 Difference]: Start difference. First operand 156 states and 166 transitions. Second operand 5 states. [2020-10-27 14:10:35,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:10:35,250 INFO L93 Difference]: Finished difference Result 304 states and 324 transitions. [2020-10-27 14:10:35,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:10:35,253 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 155 [2020-10-27 14:10:35,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:10:35,254 INFO L225 Difference]: With dead ends: 304 [2020-10-27 14:10:35,254 INFO L226 Difference]: Without dead ends: 158 [2020-10-27 14:10:35,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:10:35,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-27 14:10:35,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2020-10-27 14:10:35,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-27 14:10:35,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 168 transitions. [2020-10-27 14:10:35,272 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 168 transitions. Word has length 155 [2020-10-27 14:10:35,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:10:35,272 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 168 transitions. [2020-10-27 14:10:35,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:10:35,272 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 168 transitions. [2020-10-27 14:10:35,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-27 14:10:35,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:10:35,274 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:10:35,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:10:35,275 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:10:35,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:10:35,275 INFO L82 PathProgramCache]: Analyzing trace with hash -349506770, now seen corresponding path program 14 times [2020-10-27 14:10:35,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:10:35,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874272644] [2020-10-27 14:10:35,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:10:35,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:35,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:35,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:35,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:35,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:35,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:35,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:35,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:35,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:35,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:35,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:36,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:36,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:36,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:36,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:37,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:40,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:40,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-27 14:10:40,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 14:10:40,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 14:10:40,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:40,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:10:40,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:10:40,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 14:10:40,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:40,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:10:40,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:40,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:40,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:40,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:10:40,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:10:40,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:10:40,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:40,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:10:40,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:10:40,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:10:40,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:40,593 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-27 14:10:40,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874272644] [2020-10-27 14:10:40,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:10:40,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:10:40,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144067031] [2020-10-27 14:10:40,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:10:40,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:10:40,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:10:40,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:10:40,602 INFO L87 Difference]: Start difference. First operand 158 states and 168 transitions. Second operand 11 states. [2020-10-27 14:10:41,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:10:41,347 INFO L93 Difference]: Finished difference Result 307 states and 327 transitions. [2020-10-27 14:10:41,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:10:41,349 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 157 [2020-10-27 14:10:41,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:10:41,350 INFO L225 Difference]: With dead ends: 307 [2020-10-27 14:10:41,351 INFO L226 Difference]: Without dead ends: 161 [2020-10-27 14:10:41,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:10:41,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-27 14:10:41,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2020-10-27 14:10:41,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-27 14:10:41,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 170 transitions. [2020-10-27 14:10:41,368 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 170 transitions. Word has length 157 [2020-10-27 14:10:41,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:10:41,368 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 170 transitions. [2020-10-27 14:10:41,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:10:41,368 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 170 transitions. [2020-10-27 14:10:41,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-27 14:10:41,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:10:41,370 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:10:41,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:10:41,370 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:10:41,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:10:41,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1418816720, now seen corresponding path program 15 times [2020-10-27 14:10:41,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:10:41,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083459502] [2020-10-27 14:10:41,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:10:41,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:41,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:41,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:41,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:41,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:41,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:41,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:41,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:41,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:41,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:41,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:41,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:46,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:46,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-27 14:10:46,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 14:10:46,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:10:46,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:46,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:10:46,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:10:46,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 14:10:46,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:46,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:10:46,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:46,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:46,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:46,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:10:46,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:10:46,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:10:46,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:46,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:10:46,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:10:46,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:10:46,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:46,728 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 27 proven. 18 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-27 14:10:46,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083459502] [2020-10-27 14:10:46,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:10:46,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:10:46,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590373289] [2020-10-27 14:10:46,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:10:46,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:10:46,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:10:46,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:10:46,733 INFO L87 Difference]: Start difference. First operand 160 states and 170 transitions. Second operand 14 states. [2020-10-27 14:10:47,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:10:47,352 INFO L93 Difference]: Finished difference Result 309 states and 329 transitions. [2020-10-27 14:10:47,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:10:47,353 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 159 [2020-10-27 14:10:47,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:10:47,355 INFO L225 Difference]: With dead ends: 309 [2020-10-27 14:10:47,355 INFO L226 Difference]: Without dead ends: 163 [2020-10-27 14:10:47,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:10:47,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-27 14:10:47,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2020-10-27 14:10:47,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-27 14:10:47,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 172 transitions. [2020-10-27 14:10:47,373 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 172 transitions. Word has length 159 [2020-10-27 14:10:47,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:10:47,373 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 172 transitions. [2020-10-27 14:10:47,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:10:47,373 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 172 transitions. [2020-10-27 14:10:47,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-27 14:10:47,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:10:47,375 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:10:47,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:10:47,375 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:10:47,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:10:47,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1766472370, now seen corresponding path program 16 times [2020-10-27 14:10:47,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:10:47,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632743267] [2020-10-27 14:10:47,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:10:47,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:47,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:47,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:47,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:47,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:47,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:47,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:47,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:47,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:48,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:52,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:52,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-27 14:10:52,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:10:52,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 14:10:52,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:52,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:10:52,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:10:52,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-27 14:10:52,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:52,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:10:52,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:52,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:52,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:52,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:10:52,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:10:52,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:10:52,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:52,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:10:52,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:10:52,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:10:52,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:52,704 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 27 proven. 23 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2020-10-27 14:10:52,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632743267] [2020-10-27 14:10:52,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:10:52,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:10:52,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716970496] [2020-10-27 14:10:52,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:10:52,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:10:52,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:10:52,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:10:52,706 INFO L87 Difference]: Start difference. First operand 162 states and 172 transitions. Second operand 14 states. [2020-10-27 14:10:53,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:10:53,360 INFO L93 Difference]: Finished difference Result 311 states and 331 transitions. [2020-10-27 14:10:53,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:10:53,362 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 161 [2020-10-27 14:10:53,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:10:53,363 INFO L225 Difference]: With dead ends: 311 [2020-10-27 14:10:53,363 INFO L226 Difference]: Without dead ends: 165 [2020-10-27 14:10:53,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:10:53,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-27 14:10:53,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2020-10-27 14:10:53,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-27 14:10:53,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 174 transitions. [2020-10-27 14:10:53,381 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 174 transitions. Word has length 161 [2020-10-27 14:10:53,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:10:53,381 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 174 transitions. [2020-10-27 14:10:53,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:10:53,382 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 174 transitions. [2020-10-27 14:10:53,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-27 14:10:53,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:10:53,383 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:10:53,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:10:53,383 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:10:53,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:10:53,384 INFO L82 PathProgramCache]: Analyzing trace with hash 517605812, now seen corresponding path program 17 times [2020-10-27 14:10:53,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:10:53,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676571834] [2020-10-27 14:10:53,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:10:53,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:53,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:53,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:53,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:53,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:53,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:54,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:58,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:58,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-27 14:10:58,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:10:58,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 14:10:58,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:58,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:10:58,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:10:58,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 14:10:58,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:58,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:10:58,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:58,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:58,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:58,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:10:58,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:10:58,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:10:58,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:58,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:10:58,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:10:58,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:10:58,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:58,771 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-27 14:10:58,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676571834] [2020-10-27 14:10:58,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:10:58,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:10:58,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982674450] [2020-10-27 14:10:58,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:10:58,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:10:58,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:10:58,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:10:58,773 INFO L87 Difference]: Start difference. First operand 164 states and 174 transitions. Second operand 16 states. [2020-10-27 14:10:59,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:10:59,578 INFO L93 Difference]: Finished difference Result 313 states and 333 transitions. [2020-10-27 14:10:59,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:10:59,580 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 163 [2020-10-27 14:10:59,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:10:59,581 INFO L225 Difference]: With dead ends: 313 [2020-10-27 14:10:59,581 INFO L226 Difference]: Without dead ends: 167 [2020-10-27 14:10:59,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:10:59,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-27 14:10:59,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2020-10-27 14:10:59,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-27 14:10:59,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 176 transitions. [2020-10-27 14:10:59,600 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 176 transitions. Word has length 163 [2020-10-27 14:10:59,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:10:59,600 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 176 transitions. [2020-10-27 14:10:59,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:10:59,600 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 176 transitions. [2020-10-27 14:10:59,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-27 14:10:59,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:10:59,602 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:10:59,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:10:59,602 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:10:59,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:10:59,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1347280842, now seen corresponding path program 18 times [2020-10-27 14:10:59,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:10:59,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005923835] [2020-10-27 14:10:59,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:10:59,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:00,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking...