/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-examples/standard_two_index_04.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:34:11,099 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:34:11,104 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:34:11,168 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:34:11,169 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:34:11,177 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:34:11,180 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:34:11,186 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:34:11,190 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:34:11,196 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:34:11,198 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:34:11,200 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:34:11,201 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:34:11,205 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:34:11,207 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:34:11,210 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:34:11,212 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:34:11,216 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:34:11,245 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:34:11,254 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:34:11,257 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:34:11,259 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:34:11,261 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:34:11,264 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:34:11,275 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:34:11,275 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:34:11,276 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:34:11,279 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:34:11,279 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:34:11,281 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:34:11,281 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:34:11,282 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:34:11,284 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:34:11,285 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:34:11,286 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:34:11,287 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:34:11,287 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:34:11,288 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:34:11,288 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:34:11,289 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:34:11,290 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:34:11,299 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 14:34:11,351 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:34:11,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:34:11,355 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:34:11,356 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:34:11,356 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:34:11,356 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:34:11,356 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:34:11,357 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:34:11,357 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:34:11,357 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:34:11,358 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:34:11,359 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:34:11,359 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:34:11,359 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:34:11,360 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:34:11,360 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:34:11,360 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:34:11,360 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:34:11,361 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:34:11,361 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:34:11,361 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:34:11,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:34:11,362 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:34:11,362 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:34:11,362 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:34:11,362 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:34:11,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:34:11,363 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:34:11,363 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:34:11,363 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:34:11,815 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:34:11,844 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:34:11,847 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:34:11,849 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:34:11,850 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:34:11,851 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_04.i [2020-10-27 14:34:11,932 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d799a9170/02367d7e710c4f549df4509bbbcb872f/FLAG2ac9e0e39 [2020-10-27 14:34:12,558 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:34:12,559 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_two_index_04.i [2020-10-27 14:34:12,567 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d799a9170/02367d7e710c4f549df4509bbbcb872f/FLAG2ac9e0e39 [2020-10-27 14:34:12,922 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d799a9170/02367d7e710c4f549df4509bbbcb872f [2020-10-27 14:34:12,925 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:34:12,932 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:34:12,934 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:34:12,934 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:34:12,939 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:34:12,940 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:34:12" (1/1) ... [2020-10-27 14:34:12,945 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f4fef11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:34:12, skipping insertion in model container [2020-10-27 14:34:12,946 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:34:12" (1/1) ... [2020-10-27 14:34:12,954 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:34:12,977 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:34:13,199 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:34:13,209 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:34:13,235 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:34:13,253 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:34:13,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:34:13 WrapperNode [2020-10-27 14:34:13,254 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:34:13,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:34:13,256 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:34:13,256 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:34:13,272 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:34:13" (1/1) ... [2020-10-27 14:34:13,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:34:13" (1/1) ... [2020-10-27 14:34:13,282 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:34:13" (1/1) ... [2020-10-27 14:34:13,283 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:34:13" (1/1) ... [2020-10-27 14:34:13,292 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:34:13" (1/1) ... [2020-10-27 14:34:13,297 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:34:13" (1/1) ... [2020-10-27 14:34:13,299 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:34:13" (1/1) ... [2020-10-27 14:34:13,302 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:34:13,303 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:34:13,303 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:34:13,304 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:34:13,305 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:34:13" (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 14:34:13,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:34:13,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:34:13,401 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:34:13,401 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:34:13,401 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:34:13,402 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:34:13,402 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:34:13,402 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 14:34:13,402 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 14:34:13,403 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:34:13,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:34:13,404 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:34:13,404 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:34:13,404 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:34:13,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:34:13,406 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:34:13,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:34:13,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:34:13,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:34:13,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:34:13,955 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:34:13,955 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-27 14:34:13,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:34:13 BoogieIcfgContainer [2020-10-27 14:34:13,958 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:34:13,960 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:34:13,960 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:34:13,965 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:34:13,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:34:12" (1/3) ... [2020-10-27 14:34:13,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3113af7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:34:13, skipping insertion in model container [2020-10-27 14:34:13,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:34:13" (2/3) ... [2020-10-27 14:34:13,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3113af7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:34:13, skipping insertion in model container [2020-10-27 14:34:13,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:34:13" (3/3) ... [2020-10-27 14:34:13,969 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_two_index_04.i [2020-10-27 14:34:13,983 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:34:13,989 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:34:14,038 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:34:14,086 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:34:14,086 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:34:14,086 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:34:14,087 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:34:14,087 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:34:14,087 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:34:14,087 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:34:14,087 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:34:14,112 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-27 14:34:14,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 14:34:14,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:14,122 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:14,123 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:14,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:14,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1774182118, now seen corresponding path program 1 times [2020-10-27 14:34:14,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:14,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461159980] [2020-10-27 14:34:14,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:14,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:14,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:14,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:14,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:14,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 14:34:14,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:34:14,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 313 [2020-10-27 14:34:14,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:14,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:14,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:34:14,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:14,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-27 14:34:14,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:14,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:14,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:14,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:14,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:14,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:14,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 14:34:14,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:14,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:14,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:14,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:14,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:14,774 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 14:34:14,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461159980] [2020-10-27 14:34:14,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:34:14,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 14:34:14,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924160327] [2020-10-27 14:34:14,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 14:34:14,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:14,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 14:34:14,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:34:14,803 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-10-27 14:34:14,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:14,917 INFO L93 Difference]: Finished difference Result 48 states and 62 transitions. [2020-10-27 14:34:14,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 14:34:14,920 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-27 14:34:14,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:14,929 INFO L225 Difference]: With dead ends: 48 [2020-10-27 14:34:14,929 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 14:34:14,933 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 14:34:14,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 14:34:14,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-27 14:34:14,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-27 14:34:14,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-27 14:34:14,978 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2020-10-27 14:34:14,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:14,978 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-27 14:34:14,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 14:34:14,979 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-27 14:34:14,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 14:34:14,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:14,980 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:14,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:34:14,981 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:14,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:14,982 INFO L82 PathProgramCache]: Analyzing trace with hash 414065378, now seen corresponding path program 1 times [2020-10-27 14:34:14,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:14,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1944210275] [2020-10-27 14:34:14,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:14,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:15,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:15,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:15,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:15,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 14:34:15,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:34:15,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 243 [2020-10-27 14:34:15,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:15,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:34:15,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:34:15,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 14:34:15,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:34:15,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:15,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:15,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:15,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:15,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:15,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:15,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 14:34:15,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:15,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:15,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:15,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:15,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:34:15,358 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 14:34:15,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1944210275] [2020-10-27 14:34:15,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:34:15,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:34:15,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701756951] [2020-10-27 14:34:15,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:34:15,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:15,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:34:15,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:34:15,375 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 4 states. [2020-10-27 14:34:15,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:15,486 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-10-27 14:34:15,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:34:15,487 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-27 14:34:15,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:15,490 INFO L225 Difference]: With dead ends: 40 [2020-10-27 14:34:15,491 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 14:34:15,492 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 14:34:15,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 14:34:15,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-10-27 14:34:15,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 14:34:15,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-27 14:34:15,504 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2020-10-27 14:34:15,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:15,505 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-27 14:34:15,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:34:15,505 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-27 14:34:15,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 14:34:15,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:15,506 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:15,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:34:15,507 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:15,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:15,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1170351871, now seen corresponding path program 1 times [2020-10-27 14:34:15,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:15,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034694554] [2020-10-27 14:34:15,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:15,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:15,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:15,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:15,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:16,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:16,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 14:34:16,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:34:16,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 855 [2020-10-27 14:34:16,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:16,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:34:16,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:34:16,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 14:34:16,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:16,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:16,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:16,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:16,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:16,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:16,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:16,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:34:16,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:16,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:16,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:16,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:16,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:16,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:34:16,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034694554] [2020-10-27 14:34:16,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:34:16,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 14:34:16,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991899350] [2020-10-27 14:34:16,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:34:16,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:16,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:34:16,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:34:16,449 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 5 states. [2020-10-27 14:34:16,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:16,576 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2020-10-27 14:34:16,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:34:16,577 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-27 14:34:16,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:16,579 INFO L225 Difference]: With dead ends: 46 [2020-10-27 14:34:16,579 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 14:34:16,580 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 14:34:16,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 14:34:16,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2020-10-27 14:34:16,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 14:34:16,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-27 14:34:16,588 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 19 [2020-10-27 14:34:16,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:16,588 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-27 14:34:16,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:34:16,589 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-27 14:34:16,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 14:34:16,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:16,590 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:16,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:34:16,590 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:16,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:16,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1420739774, now seen corresponding path program 2 times [2020-10-27 14:34:16,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:16,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808858419] [2020-10-27 14:34:16,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:16,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:16,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:16,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:16,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:17,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:17,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 14:34:17,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:34:17,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 792 [2020-10-27 14:34:17,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:17,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:34:17,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 14:34:17,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 14:34:17,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:17,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:17,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:17,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:17,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:17,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:17,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:17,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:34:17,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:17,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:17,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:17,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:17,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:17,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 14:34:17,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808858419] [2020-10-27 14:34:17,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:34:17,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:34:17,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502994128] [2020-10-27 14:34:17,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:34:17,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:17,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:34:17,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:34:17,478 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 6 states. [2020-10-27 14:34:17,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:17,632 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2020-10-27 14:34:17,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:34:17,633 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-27 14:34:17,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:17,634 INFO L225 Difference]: With dead ends: 52 [2020-10-27 14:34:17,634 INFO L226 Difference]: Without dead ends: 36 [2020-10-27 14:34:17,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:34:17,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-27 14:34:17,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2020-10-27 14:34:17,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 14:34:17,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-27 14:34:17,643 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-10-27 14:34:17,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:17,644 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-27 14:34:17,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:34:17,644 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-27 14:34:17,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 14:34:17,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:17,645 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:17,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:34:17,645 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:17,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:17,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1013754463, now seen corresponding path program 3 times [2020-10-27 14:34:17,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:17,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250055227] [2020-10-27 14:34:17,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:17,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:17,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:17,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:17,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:19,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:19,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 14:34:19,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:34:19,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1417 [2020-10-27 14:34:19,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:19,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:34:19,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 14:34:19,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 14:34:19,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:19,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:19,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:19,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:19,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:19,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:19,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:19,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:34:19,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:19,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:19,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:19,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:19,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:19,181 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 14:34:19,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250055227] [2020-10-27 14:34:19,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:34:19,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 14:34:19,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058201356] [2020-10-27 14:34:19,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:34:19,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:19,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:34:19,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:34:19,184 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 7 states. [2020-10-27 14:34:19,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:19,346 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2020-10-27 14:34:19,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:34:19,347 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-27 14:34:19,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:19,348 INFO L225 Difference]: With dead ends: 58 [2020-10-27 14:34:19,348 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 14:34:19,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:34:19,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 14:34:19,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2020-10-27 14:34:19,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 14:34:19,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-27 14:34:19,357 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 23 [2020-10-27 14:34:19,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:19,358 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-27 14:34:19,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:34:19,358 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-27 14:34:19,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 14:34:19,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:19,359 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:19,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:34:19,360 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:19,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:19,360 INFO L82 PathProgramCache]: Analyzing trace with hash -2063426654, now seen corresponding path program 4 times [2020-10-27 14:34:19,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:19,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413088707] [2020-10-27 14:34:19,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:19,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:19,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:19,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:19,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:21,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:21,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 14:34:21,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:34:21,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1628 [2020-10-27 14:34:21,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:21,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:34:21,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 14:34:21,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:34:21,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:21,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:21,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:21,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:21,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:21,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:21,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:21,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:34:21,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:21,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:21,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:21,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:21,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:21,098 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-27 14:34:21,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [413088707] [2020-10-27 14:34:21,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:34:21,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:34:21,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061446159] [2020-10-27 14:34:21,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:34:21,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:21,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:34:21,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:34:21,101 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 8 states. [2020-10-27 14:34:21,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:21,266 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2020-10-27 14:34:21,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 14:34:21,266 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-27 14:34:21,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:21,268 INFO L225 Difference]: With dead ends: 64 [2020-10-27 14:34:21,268 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 14:34:21,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:34:21,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 14:34:21,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2020-10-27 14:34:21,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 14:34:21,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-27 14:34:21,276 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 25 [2020-10-27 14:34:21,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:21,277 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-27 14:34:21,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:34:21,277 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-27 14:34:21,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 14:34:21,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:21,278 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:21,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:34:21,278 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:21,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:21,279 INFO L82 PathProgramCache]: Analyzing trace with hash 532089409, now seen corresponding path program 5 times [2020-10-27 14:34:21,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:21,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175326000] [2020-10-27 14:34:21,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:21,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:21,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:21,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:21,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:23,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:23,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 14:34:23,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:34:23,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2387 [2020-10-27 14:34:23,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:23,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:34:23,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 14:34:23,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:34:23,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:23,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:23,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:23,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:23,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:23,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:23,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:23,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:34:23,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:23,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:23,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:23,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:23,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:23,794 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 14:34:23,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [175326000] [2020-10-27 14:34:23,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:34:23,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:34:23,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256232599] [2020-10-27 14:34:23,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:34:23,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:23,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:34:23,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:34:23,797 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 9 states. [2020-10-27 14:34:24,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:24,009 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2020-10-27 14:34:24,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:34:24,009 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-27 14:34:24,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:24,011 INFO L225 Difference]: With dead ends: 70 [2020-10-27 14:34:24,011 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 14:34:24,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:34:24,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 14:34:24,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 33. [2020-10-27 14:34:24,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 14:34:24,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-27 14:34:24,019 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 27 [2020-10-27 14:34:24,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:24,019 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-27 14:34:24,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:34:24,020 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-27 14:34:24,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 14:34:24,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:24,021 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:24,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:34:24,021 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:24,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:24,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1725973506, now seen corresponding path program 6 times [2020-10-27 14:34:24,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:24,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767314138] [2020-10-27 14:34:24,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:24,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:24,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:24,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:24,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:26,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:26,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 14:34:26,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:34:26,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2943 [2020-10-27 14:34:26,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:26,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:34:26,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 14:34:26,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 14:34:26,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:27,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:27,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:27,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:27,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:27,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:27,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:27,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:34:27,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:27,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:27,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:27,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:27,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:27,100 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-27 14:34:27,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767314138] [2020-10-27 14:34:27,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:34:27,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:34:27,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791291459] [2020-10-27 14:34:27,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:34:27,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:27,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:34:27,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:34:27,105 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 10 states. [2020-10-27 14:34:27,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:27,339 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2020-10-27 14:34:27,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:34:27,340 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-27 14:34:27,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:27,341 INFO L225 Difference]: With dead ends: 76 [2020-10-27 14:34:27,343 INFO L226 Difference]: Without dead ends: 56 [2020-10-27 14:34:27,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:34:27,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-27 14:34:27,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 35. [2020-10-27 14:34:27,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 14:34:27,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-27 14:34:27,357 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 29 [2020-10-27 14:34:27,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:27,358 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-27 14:34:27,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:34:27,358 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-27 14:34:27,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 14:34:27,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:27,361 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:27,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:34:27,361 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:27,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:27,362 INFO L82 PathProgramCache]: Analyzing trace with hash -74778911, now seen corresponding path program 7 times [2020-10-27 14:34:27,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:27,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253756621] [2020-10-27 14:34:27,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:27,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:27,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:27,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:27,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:31,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:31,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 14:34:31,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:34:31,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4234 [2020-10-27 14:34:31,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:31,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:34:31,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:34:31,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 14:34:31,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:34:31,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:31,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:31,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:31,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:31,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:31,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:31,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:34:31,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:31,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:31,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:31,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:31,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:31,760 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-27 14:34:31,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253756621] [2020-10-27 14:34:31,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:34:31,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:34:31,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774485601] [2020-10-27 14:34:31,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:34:31,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:31,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:34:31,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:34:31,769 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 11 states. [2020-10-27 14:34:32,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:32,016 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2020-10-27 14:34:32,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:34:32,017 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 14:34:32,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:32,018 INFO L225 Difference]: With dead ends: 82 [2020-10-27 14:34:32,018 INFO L226 Difference]: Without dead ends: 61 [2020-10-27 14:34:32,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:34:32,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-27 14:34:32,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 37. [2020-10-27 14:34:32,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 14:34:32,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-27 14:34:32,027 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 31 [2020-10-27 14:34:32,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:32,027 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-27 14:34:32,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:34:32,028 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-27 14:34:32,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 14:34:32,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:32,029 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:32,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:34:32,029 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:32,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:32,030 INFO L82 PathProgramCache]: Analyzing trace with hash -91736990, now seen corresponding path program 8 times [2020-10-27 14:34:32,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:32,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543957621] [2020-10-27 14:34:32,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:32,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:32,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:32,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:32,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:36,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:36,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 14:34:36,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:34:36,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4431 [2020-10-27 14:34:36,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:36,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:34:36,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:34:36,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 14:34:36,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:36,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:36,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:36,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:36,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:36,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:36,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:36,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:34:36,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:36,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:36,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:36,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:36,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:36,633 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-27 14:34:36,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543957621] [2020-10-27 14:34:36,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:34:36,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:34:36,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188154890] [2020-10-27 14:34:36,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:34:36,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:36,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:34:36,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:34:36,636 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 12 states. [2020-10-27 14:34:36,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:36,887 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2020-10-27 14:34:36,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:34:36,888 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-27 14:34:36,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:36,889 INFO L225 Difference]: With dead ends: 88 [2020-10-27 14:34:36,889 INFO L226 Difference]: Without dead ends: 66 [2020-10-27 14:34:36,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:34:36,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-27 14:34:36,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 39. [2020-10-27 14:34:36,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 14:34:36,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-27 14:34:36,898 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 33 [2020-10-27 14:34:36,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:36,898 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-27 14:34:36,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:34:36,898 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-27 14:34:36,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 14:34:36,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:36,900 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:36,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:34:36,900 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:36,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:36,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1955521663, now seen corresponding path program 9 times [2020-10-27 14:34:36,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:36,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785650943] [2020-10-27 14:34:36,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:36,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:36,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:36,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:37,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:41,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:41,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 14:34:41,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:34:41,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 14:34:41,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:41,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:34:41,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 14:34:41,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 14:34:41,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:42,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:42,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:42,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:42,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:42,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:42,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:42,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:34:42,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:42,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:42,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:42,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:42,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:42,083 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-27 14:34:42,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785650943] [2020-10-27 14:34:42,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:34:42,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:34:42,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117107114] [2020-10-27 14:34:42,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:34:42,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:42,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:34:42,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:34:42,086 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 13 states. [2020-10-27 14:34:42,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:42,368 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2020-10-27 14:34:42,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:34:42,369 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-27 14:34:42,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:42,370 INFO L225 Difference]: With dead ends: 94 [2020-10-27 14:34:42,370 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 14:34:42,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:34:42,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 14:34:42,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 41. [2020-10-27 14:34:42,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 14:34:42,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-27 14:34:42,378 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 35 [2020-10-27 14:34:42,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:42,378 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-27 14:34:42,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:34:42,379 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-27 14:34:42,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 14:34:42,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:42,380 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:42,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:34:42,380 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:42,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:42,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1307022142, now seen corresponding path program 10 times [2020-10-27 14:34:42,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:42,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027622137] [2020-10-27 14:34:42,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:42,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:42,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:42,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:42,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:47,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:47,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 14:34:47,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:34:47,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4726 [2020-10-27 14:34:47,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:47,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:34:47,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:34:47,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:34:47,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:47,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:47,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:47,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:47,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:47,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:47,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:47,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:34:47,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:47,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:47,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:47,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:47,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:47,530 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-27 14:34:47,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027622137] [2020-10-27 14:34:47,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:34:47,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:34:47,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953599084] [2020-10-27 14:34:47,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:34:47,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:47,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:34:47,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:34:47,533 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 14 states. [2020-10-27 14:34:47,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:47,895 INFO L93 Difference]: Finished difference Result 100 states and 116 transitions. [2020-10-27 14:34:47,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:34:47,896 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-10-27 14:34:47,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:47,898 INFO L225 Difference]: With dead ends: 100 [2020-10-27 14:34:47,898 INFO L226 Difference]: Without dead ends: 76 [2020-10-27 14:34:47,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:34:47,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-27 14:34:47,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 43. [2020-10-27 14:34:47,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 14:34:47,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-27 14:34:47,910 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 37 [2020-10-27 14:34:47,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:47,910 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-27 14:34:47,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:34:47,910 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-27 14:34:47,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 14:34:47,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:47,911 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:47,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:34:47,912 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:47,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:47,913 INFO L82 PathProgramCache]: Analyzing trace with hash 726366241, now seen corresponding path program 11 times [2020-10-27 14:34:47,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:47,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141493928] [2020-10-27 14:34:47,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:47,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:47,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:47,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:48,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:52,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:52,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 14:34:52,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:34:52,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:34:52,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:52,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:34:52,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 14:34:52,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 14:34:52,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:53,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:53,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:53,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:53,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:53,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:53,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:53,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:34:53,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:53,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:53,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:53,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:53,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:53,153 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-27 14:34:53,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141493928] [2020-10-27 14:34:53,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:34:53,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:34:53,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390310867] [2020-10-27 14:34:53,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:34:53,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:53,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:34:53,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:34:53,156 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 15 states. [2020-10-27 14:34:53,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:53,505 INFO L93 Difference]: Finished difference Result 106 states and 123 transitions. [2020-10-27 14:34:53,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:34:53,505 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-10-27 14:34:53,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:53,507 INFO L225 Difference]: With dead ends: 106 [2020-10-27 14:34:53,507 INFO L226 Difference]: Without dead ends: 81 [2020-10-27 14:34:53,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:34:53,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-27 14:34:53,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 45. [2020-10-27 14:34:53,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 14:34:53,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-27 14:34:53,516 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 39 [2020-10-27 14:34:53,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:53,517 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-27 14:34:53,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:34:53,517 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-27 14:34:53,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 14:34:53,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:53,518 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:53,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:34:53,519 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:53,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:53,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1473319646, now seen corresponding path program 12 times [2020-10-27 14:34:53,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:53,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657679813] [2020-10-27 14:34:53,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:53,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:53,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:53,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:53,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:58,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:58,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 14:34:58,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:34:58,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 14:34:58,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:58,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:34:58,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 14:34:58,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:34:58,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:58,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:58,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:58,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:58,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:58,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:58,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:58,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:34:58,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:58,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:58,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:58,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:58,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:58,785 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-10-27 14:34:58,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657679813] [2020-10-27 14:34:58,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:34:58,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:34:58,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868388935] [2020-10-27 14:34:58,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:34:58,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:58,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:34:58,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:34:58,787 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 16 states. [2020-10-27 14:34:59,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:59,201 INFO L93 Difference]: Finished difference Result 112 states and 130 transitions. [2020-10-27 14:34:59,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:34:59,202 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 41 [2020-10-27 14:34:59,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:59,204 INFO L225 Difference]: With dead ends: 112 [2020-10-27 14:34:59,204 INFO L226 Difference]: Without dead ends: 86 [2020-10-27 14:34:59,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:34:59,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-27 14:34:59,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 47. [2020-10-27 14:34:59,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 14:34:59,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-10-27 14:34:59,220 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 41 [2020-10-27 14:34:59,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:59,220 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-10-27 14:34:59,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:34:59,221 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-10-27 14:34:59,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 14:34:59,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:59,221 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:59,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:34:59,222 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:59,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:59,223 INFO L82 PathProgramCache]: Analyzing trace with hash 2122058945, now seen corresponding path program 13 times [2020-10-27 14:34:59,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:59,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072141077] [2020-10-27 14:34:59,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:59,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:59,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:59,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:59,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:04,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:04,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 14:35:04,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:35:04,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:35:04,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:04,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:35:04,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 14:35:04,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 14:35:04,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:04,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:35:04,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:04,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:04,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:04,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:35:04,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:35:04,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:35:04,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:04,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:04,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:35:04,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:04,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:04,480 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-10-27 14:35:04,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072141077] [2020-10-27 14:35:04,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:35:04,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:35:04,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113259424] [2020-10-27 14:35:04,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:35:04,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:35:04,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:35:04,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:35:04,483 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 17 states. [2020-10-27 14:35:04,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:35:04,865 INFO L93 Difference]: Finished difference Result 118 states and 137 transitions. [2020-10-27 14:35:04,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:35:04,865 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 43 [2020-10-27 14:35:04,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:35:04,867 INFO L225 Difference]: With dead ends: 118 [2020-10-27 14:35:04,867 INFO L226 Difference]: Without dead ends: 91 [2020-10-27 14:35:04,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:35:04,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-27 14:35:04,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 49. [2020-10-27 14:35:04,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 14:35:04,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-10-27 14:35:04,876 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 43 [2020-10-27 14:35:04,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:35:04,877 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-10-27 14:35:04,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:35:04,877 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-10-27 14:35:04,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:35:04,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:35:04,878 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:35:04,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:35:04,878 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:35:04,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:35:04,879 INFO L82 PathProgramCache]: Analyzing trace with hash 2146022786, now seen corresponding path program 14 times [2020-10-27 14:35:04,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:35:04,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607326667] [2020-10-27 14:35:04,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:35:04,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:04,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:04,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:05,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:09,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:09,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 14:35:09,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:35:09,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 14:35:09,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:09,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:35:09,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 14:35:09,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 14:35:09,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:10,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:35:10,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:10,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:10,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:10,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:35:10,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:35:10,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:35:10,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:10,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:10,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:35:10,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:10,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:10,180 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-27 14:35:10,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607326667] [2020-10-27 14:35:10,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:35:10,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:35:10,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054794844] [2020-10-27 14:35:10,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:35:10,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:35:10,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:35:10,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:35:10,189 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 18 states. [2020-10-27 14:35:10,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:35:10,638 INFO L93 Difference]: Finished difference Result 124 states and 144 transitions. [2020-10-27 14:35:10,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:35:10,639 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-10-27 14:35:10,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:35:10,641 INFO L225 Difference]: With dead ends: 124 [2020-10-27 14:35:10,641 INFO L226 Difference]: Without dead ends: 96 [2020-10-27 14:35:10,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:35:10,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-27 14:35:10,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 51. [2020-10-27 14:35:10,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 14:35:10,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-10-27 14:35:10,650 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 45 [2020-10-27 14:35:10,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:35:10,650 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-10-27 14:35:10,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:35:10,650 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-10-27 14:35:10,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 14:35:10,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:35:10,651 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:35:10,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:35:10,652 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:35:10,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:35:10,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1880827551, now seen corresponding path program 15 times [2020-10-27 14:35:10,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:35:10,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1679847361] [2020-10-27 14:35:10,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:35:10,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:10,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:10,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:11,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:15,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:15,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:35:15,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:35:15,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:35:15,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:15,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:35:15,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 14:35:15,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 14:35:15,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:15,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:35:15,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:15,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:15,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:15,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:35:15,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:35:15,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:35:15,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:15,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:15,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:35:15,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:15,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:15,986 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-10-27 14:35:15,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1679847361] [2020-10-27 14:35:15,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:35:15,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:35:15,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481780102] [2020-10-27 14:35:15,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:35:15,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:35:15,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:35:15,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:35:15,988 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 19 states. [2020-10-27 14:35:16,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:35:16,424 INFO L93 Difference]: Finished difference Result 130 states and 151 transitions. [2020-10-27 14:35:16,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:35:16,424 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2020-10-27 14:35:16,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:35:16,426 INFO L225 Difference]: With dead ends: 130 [2020-10-27 14:35:16,426 INFO L226 Difference]: Without dead ends: 101 [2020-10-27 14:35:16,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:35:16,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-27 14:35:16,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 53. [2020-10-27 14:35:16,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 14:35:16,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-27 14:35:16,447 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 47 [2020-10-27 14:35:16,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:35:16,447 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-27 14:35:16,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:35:16,448 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-27 14:35:16,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 14:35:16,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:35:16,449 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:35:16,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:35:16,452 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:35:16,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:35:16,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1155974626, now seen corresponding path program 16 times [2020-10-27 14:35:16,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:35:16,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878638102] [2020-10-27 14:35:16,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:35:16,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:16,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:16,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:17,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:21,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:21,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 14:35:21,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:35:21,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 14:35:21,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:21,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:35:21,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 14:35:21,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 14:35:21,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:21,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:35:21,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:21,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:21,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:21,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:35:21,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:35:21,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:35:21,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:21,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:21,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:35:21,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:21,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:21,811 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2020-10-27 14:35:21,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878638102] [2020-10-27 14:35:21,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:35:21,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:35:21,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64285839] [2020-10-27 14:35:21,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:35:21,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:35:21,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:35:21,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:35:21,822 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 20 states. [2020-10-27 14:35:22,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:35:22,323 INFO L93 Difference]: Finished difference Result 136 states and 158 transitions. [2020-10-27 14:35:22,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:35:22,330 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 49 [2020-10-27 14:35:22,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:35:22,331 INFO L225 Difference]: With dead ends: 136 [2020-10-27 14:35:22,331 INFO L226 Difference]: Without dead ends: 106 [2020-10-27 14:35:22,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:35:22,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-27 14:35:22,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 55. [2020-10-27 14:35:22,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 14:35:22,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-27 14:35:22,339 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 49 [2020-10-27 14:35:22,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:35:22,340 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-27 14:35:22,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:35:22,340 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-27 14:35:22,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 14:35:22,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:35:22,341 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:35:22,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:35:22,341 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:35:22,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:35:22,341 INFO L82 PathProgramCache]: Analyzing trace with hash -236462591, now seen corresponding path program 17 times [2020-10-27 14:35:22,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:35:22,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460034037] [2020-10-27 14:35:22,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:35:22,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:22,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:22,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:27,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:27,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 14:35:27,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:35:27,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:35:27,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:27,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:35:27,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 14:35:27,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 14:35:27,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:35:27,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:35:27,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:27,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:27,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:27,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:35:27,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:35:27,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:35:27,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:27,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:27,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:35:27,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:27,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:27,709 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-10-27 14:35:27,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460034037] [2020-10-27 14:35:27,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:35:27,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:35:27,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81358594] [2020-10-27 14:35:27,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:35:27,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:35:27,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:35:27,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:35:27,717 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 21 states. [2020-10-27 14:35:28,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:35:28,258 INFO L93 Difference]: Finished difference Result 142 states and 165 transitions. [2020-10-27 14:35:28,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:35:28,259 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 51 [2020-10-27 14:35:28,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:35:28,262 INFO L225 Difference]: With dead ends: 142 [2020-10-27 14:35:28,262 INFO L226 Difference]: Without dead ends: 111 [2020-10-27 14:35:28,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:35:28,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-27 14:35:28,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 57. [2020-10-27 14:35:28,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 14:35:28,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-10-27 14:35:28,275 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 51 [2020-10-27 14:35:28,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:35:28,276 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-10-27 14:35:28,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:35:28,276 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-10-27 14:35:28,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 14:35:28,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:35:28,277 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:35:28,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:35:28,277 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:35:28,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:35:28,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1262755394, now seen corresponding path program 18 times [2020-10-27 14:35:28,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:35:28,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712403110] [2020-10-27 14:35:28,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:35:28,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:28,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:28,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:33,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:33,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 14:35:33,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:35:33,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 14:35:33,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:33,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:35:33,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 14:35:33,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:35:33,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:33,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:35:33,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:33,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:33,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:33,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:35:33,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:35:33,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:35:33,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:33,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:33,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:35:33,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:33,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:33,682 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-10-27 14:35:33,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712403110] [2020-10-27 14:35:33,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:35:33,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:35:33,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984208400] [2020-10-27 14:35:33,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:35:33,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:35:33,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:35:33,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:35:33,687 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 22 states. [2020-10-27 14:35:34,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:35:34,234 INFO L93 Difference]: Finished difference Result 148 states and 172 transitions. [2020-10-27 14:35:34,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:35:34,235 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 53 [2020-10-27 14:35:34,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:35:34,236 INFO L225 Difference]: With dead ends: 148 [2020-10-27 14:35:34,236 INFO L226 Difference]: Without dead ends: 116 [2020-10-27 14:35:34,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:35:34,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-27 14:35:34,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 59. [2020-10-27 14:35:34,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-27 14:35:34,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-10-27 14:35:34,255 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 53 [2020-10-27 14:35:34,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:35:34,255 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-10-27 14:35:34,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:35:34,256 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-10-27 14:35:34,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 14:35:34,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:35:34,259 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:35:34,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:35:34,261 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:35:34,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:35:34,261 INFO L82 PathProgramCache]: Analyzing trace with hash -563668319, now seen corresponding path program 19 times [2020-10-27 14:35:34,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:35:34,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849776507] [2020-10-27 14:35:34,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:35:34,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:34,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:34,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:39,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:39,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 14:35:39,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:35:39,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:35:39,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:39,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:35:39,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-27 14:35:39,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 14:35:39,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:39,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:35:39,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:39,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:39,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:39,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:35:39,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:35:39,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:35:39,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:39,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:39,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:35:39,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:39,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:39,672 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-10-27 14:35:39,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849776507] [2020-10-27 14:35:39,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:35:39,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:35:39,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295446336] [2020-10-27 14:35:39,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:35:39,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:35:39,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:35:39,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:35:39,677 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 23 states. [2020-10-27 14:35:40,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:35:40,155 INFO L93 Difference]: Finished difference Result 154 states and 179 transitions. [2020-10-27 14:35:40,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:35:40,155 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 55 [2020-10-27 14:35:40,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:35:40,156 INFO L225 Difference]: With dead ends: 154 [2020-10-27 14:35:40,157 INFO L226 Difference]: Without dead ends: 121 [2020-10-27 14:35:40,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:35:40,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-27 14:35:40,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 61. [2020-10-27 14:35:40,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 14:35:40,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2020-10-27 14:35:40,164 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 55 [2020-10-27 14:35:40,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:35:40,164 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2020-10-27 14:35:40,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:35:40,164 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2020-10-27 14:35:40,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 14:35:40,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:35:40,165 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:35:40,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:35:40,166 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:35:40,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:35:40,166 INFO L82 PathProgramCache]: Analyzing trace with hash 262127266, now seen corresponding path program 20 times [2020-10-27 14:35:40,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:35:40,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684422836] [2020-10-27 14:35:40,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:35:40,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:40,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:40,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:45,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:45,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 14:35:45,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:35:45,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:35:45,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:45,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 14:35:45,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 14:35:45,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:35:45,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:45,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:35:45,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:45,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:45,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:45,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:35:45,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:35:45,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:35:45,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:45,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:45,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:35:45,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:45,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:45,637 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-27 14:35:45,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684422836] [2020-10-27 14:35:45,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:35:45,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 14:35:45,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722067426] [2020-10-27 14:35:45,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 14:35:45,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:35:45,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 14:35:45,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:35:45,639 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 24 states. [2020-10-27 14:35:46,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:35:46,168 INFO L93 Difference]: Finished difference Result 160 states and 186 transitions. [2020-10-27 14:35:46,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 14:35:46,169 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 57 [2020-10-27 14:35:46,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:35:46,171 INFO L225 Difference]: With dead ends: 160 [2020-10-27 14:35:46,171 INFO L226 Difference]: Without dead ends: 126 [2020-10-27 14:35:46,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:35:46,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-27 14:35:46,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 63. [2020-10-27 14:35:46,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 14:35:46,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-10-27 14:35:46,178 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 57 [2020-10-27 14:35:46,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:35:46,179 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-10-27 14:35:46,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 14:35:46,179 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-10-27 14:35:46,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 14:35:46,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:35:46,179 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:35:46,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:35:46,180 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:35:46,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:35:46,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1455722305, now seen corresponding path program 21 times [2020-10-27 14:35:46,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:35:46,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11178144] [2020-10-27 14:35:46,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:35:46,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:46,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:46,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:51,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:51,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 14:35:51,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:35:51,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:35:51,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:51,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 14:35:51,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-27 14:35:51,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 14:35:51,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:51,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:35:51,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:51,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:51,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:51,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:35:51,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:35:51,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:35:51,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:51,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:51,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:35:51,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:51,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:51,673 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2020-10-27 14:35:51,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11178144] [2020-10-27 14:35:51,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:35:51,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:35:51,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318621840] [2020-10-27 14:35:51,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:35:51,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:35:51,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:35:51,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:35:51,676 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 25 states. [2020-10-27 14:35:52,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:35:52,215 INFO L93 Difference]: Finished difference Result 166 states and 193 transitions. [2020-10-27 14:35:52,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:35:52,216 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 59 [2020-10-27 14:35:52,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:35:52,217 INFO L225 Difference]: With dead ends: 166 [2020-10-27 14:35:52,218 INFO L226 Difference]: Without dead ends: 131 [2020-10-27 14:35:52,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:35:52,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-27 14:35:52,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 65. [2020-10-27 14:35:52,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-27 14:35:52,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-10-27 14:35:52,228 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 59 [2020-10-27 14:35:52,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:35:52,228 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-10-27 14:35:52,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:35:52,229 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-10-27 14:35:52,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 14:35:52,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:35:52,229 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:35:52,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:35:52,230 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:35:52,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:35:52,230 INFO L82 PathProgramCache]: Analyzing trace with hash 387426050, now seen corresponding path program 22 times [2020-10-27 14:35:52,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:35:52,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589611702] [2020-10-27 14:35:52,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:35:52,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:52,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:52,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:57,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:57,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 14:35:57,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:35:57,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 14:35:57,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:57,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 14:35:57,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 14:35:57,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 14:35:57,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:57,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:35:57,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:57,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:57,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:57,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:35:57,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:35:57,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:35:57,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:57,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:57,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:35:57,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:57,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:57,768 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-10-27 14:35:57,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589611702] [2020-10-27 14:35:57,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:35:57,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 14:35:57,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848771417] [2020-10-27 14:35:57,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 14:35:57,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:35:57,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 14:35:57,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:35:57,770 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 26 states. [2020-10-27 14:35:58,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:35:58,364 INFO L93 Difference]: Finished difference Result 172 states and 200 transitions. [2020-10-27 14:35:58,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:35:58,365 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 61 [2020-10-27 14:35:58,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:35:58,366 INFO L225 Difference]: With dead ends: 172 [2020-10-27 14:35:58,366 INFO L226 Difference]: Without dead ends: 136 [2020-10-27 14:35:58,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:35:58,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-27 14:35:58,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 67. [2020-10-27 14:35:58,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 14:35:58,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-10-27 14:35:58,375 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 61 [2020-10-27 14:35:58,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:35:58,375 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-10-27 14:35:58,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 14:35:58,376 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-10-27 14:35:58,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 14:35:58,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:35:58,376 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:35:58,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:35:58,377 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:35:58,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:35:58,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1138899937, now seen corresponding path program 23 times [2020-10-27 14:35:58,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:35:58,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253140503] [2020-10-27 14:35:58,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:35:58,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:58,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:58,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:03,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:03,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 14:36:03,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:36:03,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 14:36:03,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:03,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 14:36:03,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-27 14:36:03,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 14:36:03,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:03,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:36:03,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:03,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:03,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:03,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:36:03,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:36:03,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:36:03,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:03,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:36:03,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:36:03,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:36:03,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:03,944 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-10-27 14:36:03,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253140503] [2020-10-27 14:36:03,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:36:03,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 14:36:03,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797986205] [2020-10-27 14:36:03,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 14:36:03,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:36:03,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 14:36:03,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:36:03,946 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 27 states. [2020-10-27 14:36:04,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:36:04,564 INFO L93 Difference]: Finished difference Result 178 states and 207 transitions. [2020-10-27 14:36:04,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:36:04,565 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 63 [2020-10-27 14:36:04,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:36:04,567 INFO L225 Difference]: With dead ends: 178 [2020-10-27 14:36:04,567 INFO L226 Difference]: Without dead ends: 141 [2020-10-27 14:36:04,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:36:04,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-27 14:36:04,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 69. [2020-10-27 14:36:04,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 14:36:04,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-10-27 14:36:04,575 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 63 [2020-10-27 14:36:04,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:36:04,575 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-10-27 14:36:04,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 14:36:04,575 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-10-27 14:36:04,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 14:36:04,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:36:04,576 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:36:04,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:36:04,576 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:36:04,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:36:04,577 INFO L82 PathProgramCache]: Analyzing trace with hash -817244318, now seen corresponding path program 24 times [2020-10-27 14:36:04,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:36:04,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428047766] [2020-10-27 14:36:04,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:36:04,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:04,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:04,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:09,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:09,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 14:36:09,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:36:09,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 14:36:09,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:09,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 14:36:09,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-27 14:36:09,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:36:09,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:10,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:36:10,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:10,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:10,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:10,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:36:10,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:36:10,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:36:10,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:10,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:36:10,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:36:10,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:36:10,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:10,198 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-10-27 14:36:10,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428047766] [2020-10-27 14:36:10,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:36:10,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 14:36:10,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463205867] [2020-10-27 14:36:10,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 14:36:10,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:36:10,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 14:36:10,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:36:10,202 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 28 states. [2020-10-27 14:36:10,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:36:10,936 INFO L93 Difference]: Finished difference Result 184 states and 214 transitions. [2020-10-27 14:36:10,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 14:36:10,937 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 65 [2020-10-27 14:36:10,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:36:10,939 INFO L225 Difference]: With dead ends: 184 [2020-10-27 14:36:10,939 INFO L226 Difference]: Without dead ends: 146 [2020-10-27 14:36:10,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:36:10,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-27 14:36:10,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 71. [2020-10-27 14:36:10,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 14:36:10,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-27 14:36:10,956 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 65 [2020-10-27 14:36:10,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:36:10,957 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-27 14:36:10,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 14:36:10,957 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-27 14:36:10,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 14:36:10,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:36:10,958 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:36:10,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:36:10,958 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:36:10,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:36:10,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1776148351, now seen corresponding path program 25 times [2020-10-27 14:36:10,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:36:10,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784847303] [2020-10-27 14:36:10,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:36:10,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:11,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:11,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:16,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:16,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 14:36:16,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:36:16,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-27 14:36:16,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:16,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 14:36:16,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-27 14:36:16,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 14:36:16,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:16,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:36:16,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:16,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:16,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:16,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:36:16,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:36:16,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:36:16,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:16,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:36:16,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:36:16,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:36:16,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:16,636 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2020-10-27 14:36:16,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784847303] [2020-10-27 14:36:16,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:36:16,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 14:36:16,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478697932] [2020-10-27 14:36:16,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 14:36:16,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:36:16,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 14:36:16,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:36:16,641 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 29 states. [2020-10-27 14:36:17,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:36:17,278 INFO L93 Difference]: Finished difference Result 190 states and 221 transitions. [2020-10-27 14:36:17,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:36:17,279 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 67 [2020-10-27 14:36:17,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:36:17,281 INFO L225 Difference]: With dead ends: 190 [2020-10-27 14:36:17,281 INFO L226 Difference]: Without dead ends: 151 [2020-10-27 14:36:17,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:36:17,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-27 14:36:17,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 73. [2020-10-27 14:36:17,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 14:36:17,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-10-27 14:36:17,289 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 67 [2020-10-27 14:36:17,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:36:17,290 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-10-27 14:36:17,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 14:36:17,290 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-10-27 14:36:17,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 14:36:17,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:36:17,291 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:36:17,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 14:36:17,291 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:36:17,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:36:17,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1851019202, now seen corresponding path program 26 times [2020-10-27 14:36:17,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:36:17,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261300095] [2020-10-27 14:36:17,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:36:17,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:17,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:17,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:22,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:22,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 14:36:22,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:36:22,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 14:36:22,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:22,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 14:36:22,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-27 14:36:22,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 14:36:22,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:22,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:36:22,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:22,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:22,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:22,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:36:22,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:36:22,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:36:22,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:22,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:36:22,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:36:22,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:36:22,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:22,986 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-10-27 14:36:22,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261300095] [2020-10-27 14:36:22,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:36:22,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 14:36:22,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981602424] [2020-10-27 14:36:22,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 14:36:22,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:36:22,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 14:36:22,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:36:22,988 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 30 states. [2020-10-27 14:36:23,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:36:23,674 INFO L93 Difference]: Finished difference Result 196 states and 228 transitions. [2020-10-27 14:36:23,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 14:36:23,675 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 69 [2020-10-27 14:36:23,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:36:23,676 INFO L225 Difference]: With dead ends: 196 [2020-10-27 14:36:23,676 INFO L226 Difference]: Without dead ends: 156 [2020-10-27 14:36:23,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:36:23,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-27 14:36:23,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 75. [2020-10-27 14:36:23,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-27 14:36:23,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-10-27 14:36:23,689 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 69 [2020-10-27 14:36:23,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:36:23,689 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-10-27 14:36:23,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 14:36:23,689 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-10-27 14:36:23,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 14:36:23,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:36:23,690 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:36:23,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 14:36:23,690 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:36:23,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:36:23,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1701199137, now seen corresponding path program 27 times [2020-10-27 14:36:23,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:36:23,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506478798] [2020-10-27 14:36:23,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:36:23,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:23,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:24,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:28,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:28,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 14:36:28,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:36:28,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:36:28,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:28,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 14:36:28,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-27 14:36:28,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 14:36:28,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:29,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:36:29,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:29,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:29,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:29,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:36:29,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:36:29,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:36:29,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:29,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:36:29,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:36:29,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:36:29,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:29,369 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2020-10-27 14:36:29,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506478798] [2020-10-27 14:36:29,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:36:29,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 14:36:29,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937279009] [2020-10-27 14:36:29,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 14:36:29,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:36:29,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 14:36:29,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:36:29,371 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 31 states. [2020-10-27 14:36:30,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:36:30,084 INFO L93 Difference]: Finished difference Result 202 states and 235 transitions. [2020-10-27 14:36:30,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 14:36:30,085 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 71 [2020-10-27 14:36:30,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:36:30,087 INFO L225 Difference]: With dead ends: 202 [2020-10-27 14:36:30,087 INFO L226 Difference]: Without dead ends: 161 [2020-10-27 14:36:30,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:36:30,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-27 14:36:30,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 77. [2020-10-27 14:36:30,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-27 14:36:30,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2020-10-27 14:36:30,096 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 71 [2020-10-27 14:36:30,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:36:30,096 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2020-10-27 14:36:30,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 14:36:30,096 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2020-10-27 14:36:30,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 14:36:30,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:36:30,097 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:36:30,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 14:36:30,097 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:36:30,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:36:30,098 INFO L82 PathProgramCache]: Analyzing trace with hash -757788638, now seen corresponding path program 28 times [2020-10-27 14:36:30,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:36:30,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302407150] [2020-10-27 14:36:30,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:36:30,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:30,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:30,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:35,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:35,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 14:36:35,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:36:35,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 14:36:35,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:35,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 14:36:35,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-27 14:36:35,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 14:36:35,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:35,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:36:35,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:35,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:35,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:35,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:36:35,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:36:35,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:36:35,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:35,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:36:35,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:36:35,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:36:35,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:35,843 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2020-10-27 14:36:35,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302407150] [2020-10-27 14:36:35,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:36:35,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 14:36:35,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769033802] [2020-10-27 14:36:35,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 14:36:35,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:36:35,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 14:36:35,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:36:35,846 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 32 states. [2020-10-27 14:36:36,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:36:36,831 INFO L93 Difference]: Finished difference Result 208 states and 242 transitions. [2020-10-27 14:36:36,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:36:36,831 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 73 [2020-10-27 14:36:36,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:36:36,834 INFO L225 Difference]: With dead ends: 208 [2020-10-27 14:36:36,834 INFO L226 Difference]: Without dead ends: 166 [2020-10-27 14:36:36,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:36:36,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-27 14:36:36,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 79. [2020-10-27 14:36:36,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-27 14:36:36,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2020-10-27 14:36:36,842 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 73 [2020-10-27 14:36:36,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:36:36,842 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2020-10-27 14:36:36,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 14:36:36,843 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2020-10-27 14:36:36,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 14:36:36,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:36:36,844 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:36:36,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 14:36:36,844 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:36:36,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:36:36,844 INFO L82 PathProgramCache]: Analyzing trace with hash 286298561, now seen corresponding path program 29 times [2020-10-27 14:36:36,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:36:36,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689645759] [2020-10-27 14:36:36,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:36:36,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:36,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:37,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:41,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:41,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 14:36:41,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:36:41,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-27 14:36:41,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:41,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 14:36:41,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-27 14:36:41,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 14:36:41,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:42,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:36:42,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:42,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:42,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:42,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:36:42,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:36:42,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:36:42,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:42,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:36:42,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:36:42,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:36:42,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:42,656 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2020-10-27 14:36:42,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689645759] [2020-10-27 14:36:42,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:36:42,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 14:36:42,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548166380] [2020-10-27 14:36:42,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 14:36:42,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:36:42,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 14:36:42,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:36:42,659 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 33 states. [2020-10-27 14:36:43,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:36:43,445 INFO L93 Difference]: Finished difference Result 214 states and 249 transitions. [2020-10-27 14:36:43,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 14:36:43,452 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 75 [2020-10-27 14:36:43,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:36:43,453 INFO L225 Difference]: With dead ends: 214 [2020-10-27 14:36:43,453 INFO L226 Difference]: Without dead ends: 171 [2020-10-27 14:36:43,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:36:43,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-27 14:36:43,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 81. [2020-10-27 14:36:43,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-27 14:36:43,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-10-27 14:36:43,465 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 75 [2020-10-27 14:36:43,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:36:43,465 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-10-27 14:36:43,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 14:36:43,465 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-10-27 14:36:43,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 14:36:43,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:36:43,466 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:36:43,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 14:36:43,467 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:36:43,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:36:43,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1676286082, now seen corresponding path program 30 times [2020-10-27 14:36:43,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:36:43,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117797482] [2020-10-27 14:36:43,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:36:43,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:43,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:43,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:48,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:48,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 14:36:48,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:36:48,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-27 14:36:48,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:48,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 14:36:48,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 14:36:48,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:36:48,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:49,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:36:49,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:49,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:49,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:49,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:36:49,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:36:49,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:36:49,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:49,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:36:49,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:36:49,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:36:49,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:49,335 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2020-10-27 14:36:49,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117797482] [2020-10-27 14:36:49,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:36:49,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 14:36:49,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594532620] [2020-10-27 14:36:49,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 14:36:49,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:36:49,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 14:36:49,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:36:49,337 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 34 states. [2020-10-27 14:36:50,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:36:50,124 INFO L93 Difference]: Finished difference Result 220 states and 256 transitions. [2020-10-27 14:36:50,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 14:36:50,124 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 77 [2020-10-27 14:36:50,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:36:50,126 INFO L225 Difference]: With dead ends: 220 [2020-10-27 14:36:50,126 INFO L226 Difference]: Without dead ends: 176 [2020-10-27 14:36:50,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:36:50,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-27 14:36:50,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 83. [2020-10-27 14:36:50,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 14:36:50,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-10-27 14:36:50,134 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 77 [2020-10-27 14:36:50,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:36:50,135 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-10-27 14:36:50,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 14:36:50,135 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-10-27 14:36:50,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 14:36:50,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:36:50,136 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:36:50,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 14:36:50,136 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:36:50,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:36:50,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1610817121, now seen corresponding path program 31 times [2020-10-27 14:36:50,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:36:50,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238844836] [2020-10-27 14:36:50,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:36:50,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:50,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:50,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:55,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:55,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 14:36:55,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:36:55,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 14:36:55,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:55,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 14:36:55,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-27 14:36:55,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 14:36:55,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:55,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:36:55,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:55,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:55,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:55,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:36:55,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:36:55,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:36:55,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:55,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:36:55,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:36:55,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:36:55,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:55,992 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2020-10-27 14:36:55,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238844836] [2020-10-27 14:36:55,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:36:55,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 14:36:55,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418943108] [2020-10-27 14:36:55,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 14:36:55,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:36:55,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 14:36:55,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:36:55,995 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 35 states. [2020-10-27 14:36:56,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:36:56,857 INFO L93 Difference]: Finished difference Result 226 states and 263 transitions. [2020-10-27 14:36:56,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 14:36:56,863 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 79 [2020-10-27 14:36:56,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:36:56,864 INFO L225 Difference]: With dead ends: 226 [2020-10-27 14:36:56,864 INFO L226 Difference]: Without dead ends: 181 [2020-10-27 14:36:56,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:36:56,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-27 14:36:56,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 85. [2020-10-27 14:36:56,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-27 14:36:56,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2020-10-27 14:36:56,873 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 79 [2020-10-27 14:36:56,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:36:56,873 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2020-10-27 14:36:56,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 14:36:56,873 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2020-10-27 14:36:56,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 14:36:56,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:36:56,874 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:36:56,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 14:36:56,875 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:36:56,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:36:56,875 INFO L82 PathProgramCache]: Analyzing trace with hash -248420126, now seen corresponding path program 32 times [2020-10-27 14:36:56,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:36:56,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81699995] [2020-10-27 14:36:56,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:36:56,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:56,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:57,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:01,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:01,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 14:37:01,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:37:01,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-27 14:37:01,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:01,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 14:37:01,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-27 14:37:01,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 14:37:01,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:02,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:37:02,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:02,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:02,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:02,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:37:02,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:37:02,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:37:02,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:02,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:37:02,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:37:02,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:37:02,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:02,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2020-10-27 14:37:02,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81699995] [2020-10-27 14:37:02,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:37:02,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 14:37:02,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239056640] [2020-10-27 14:37:02,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 14:37:02,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:37:02,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 14:37:02,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:37:02,814 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 36 states. [2020-10-27 14:37:03,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:37:03,881 INFO L93 Difference]: Finished difference Result 232 states and 270 transitions. [2020-10-27 14:37:03,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 14:37:03,882 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 81 [2020-10-27 14:37:03,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:37:03,884 INFO L225 Difference]: With dead ends: 232 [2020-10-27 14:37:03,884 INFO L226 Difference]: Without dead ends: 186 [2020-10-27 14:37:03,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:37:03,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-27 14:37:03,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 87. [2020-10-27 14:37:03,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-27 14:37:03,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-10-27 14:37:03,892 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 81 [2020-10-27 14:37:03,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:37:03,892 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-10-27 14:37:03,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 14:37:03,892 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-10-27 14:37:03,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 14:37:03,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:37:03,893 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:37:03,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 14:37:03,893 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:37:03,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:37:03,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1600134399, now seen corresponding path program 33 times [2020-10-27 14:37:03,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:37:03,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30641706] [2020-10-27 14:37:03,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:37:03,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:03,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:04,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:08,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:08,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 14:37:08,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:37:08,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-27 14:37:08,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:08,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 14:37:08,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-27 14:37:08,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 14:37:08,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:09,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:37:09,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:09,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:09,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:09,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:37:09,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:37:09,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:37:09,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:09,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:37:09,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:37:09,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:37:09,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:09,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2020-10-27 14:37:09,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30641706] [2020-10-27 14:37:09,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:37:09,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 14:37:09,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801484708] [2020-10-27 14:37:09,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 14:37:09,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:37:09,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 14:37:09,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:37:09,864 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 37 states. [2020-10-27 14:37:10,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:37:10,787 INFO L93 Difference]: Finished difference Result 238 states and 277 transitions. [2020-10-27 14:37:10,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 14:37:10,788 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 83 [2020-10-27 14:37:10,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:37:10,790 INFO L225 Difference]: With dead ends: 238 [2020-10-27 14:37:10,790 INFO L226 Difference]: Without dead ends: 191 [2020-10-27 14:37:10,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:37:10,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-27 14:37:10,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 89. [2020-10-27 14:37:10,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-27 14:37:10,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2020-10-27 14:37:10,798 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 83 [2020-10-27 14:37:10,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:37:10,798 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2020-10-27 14:37:10,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 14:37:10,799 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2020-10-27 14:37:10,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 14:37:10,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:37:10,802 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:37:10,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 14:37:10,802 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:37:10,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:37:10,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1832320702, now seen corresponding path program 34 times [2020-10-27 14:37:10,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:37:10,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476805466] [2020-10-27 14:37:10,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:37:10,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:10,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:11,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:15,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:15,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 14:37:15,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:37:15,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-27 14:37:15,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:15,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 14:37:15,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-27 14:37:15,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 14:37:15,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:16,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:37:16,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:16,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:16,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:16,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:37:16,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:37:16,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:37:16,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:16,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:37:16,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:37:16,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:37:16,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:16,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2020-10-27 14:37:16,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476805466] [2020-10-27 14:37:16,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:37:16,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 14:37:16,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215044000] [2020-10-27 14:37:16,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 14:37:16,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:37:16,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 14:37:16,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:37:16,835 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand 38 states. [2020-10-27 14:37:17,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:37:17,810 INFO L93 Difference]: Finished difference Result 244 states and 284 transitions. [2020-10-27 14:37:17,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 14:37:17,810 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 85 [2020-10-27 14:37:17,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:37:17,813 INFO L225 Difference]: With dead ends: 244 [2020-10-27 14:37:17,813 INFO L226 Difference]: Without dead ends: 196 [2020-10-27 14:37:17,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:37:17,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-27 14:37:17,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 91. [2020-10-27 14:37:17,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 14:37:17,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2020-10-27 14:37:17,821 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 85 [2020-10-27 14:37:17,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:37:17,822 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2020-10-27 14:37:17,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 14:37:17,822 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2020-10-27 14:37:17,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 14:37:17,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:37:17,823 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:37:17,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 14:37:17,823 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:37:17,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:37:17,824 INFO L82 PathProgramCache]: Analyzing trace with hash -926359647, now seen corresponding path program 35 times [2020-10-27 14:37:17,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:37:17,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523758340] [2020-10-27 14:37:17,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:37:17,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:17,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:18,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:22,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:22,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 14:37:22,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:37:22,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 14:37:22,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:22,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 14:37:22,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-27 14:37:22,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 14:37:22,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:24,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:37:24,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:24,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:24,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:24,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:37:24,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:37:24,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:37:24,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:24,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:37:24,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:37:24,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:37:24,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:24,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-10-27 14:37:24,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523758340] [2020-10-27 14:37:24,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:37:24,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 14:37:24,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901505888] [2020-10-27 14:37:24,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 14:37:24,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:37:24,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 14:37:24,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:37:24,041 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 39 states. [2020-10-27 14:37:25,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:37:25,062 INFO L93 Difference]: Finished difference Result 250 states and 291 transitions. [2020-10-27 14:37:25,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 14:37:25,063 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 87 [2020-10-27 14:37:25,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:37:25,065 INFO L225 Difference]: With dead ends: 250 [2020-10-27 14:37:25,065 INFO L226 Difference]: Without dead ends: 201 [2020-10-27 14:37:25,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:37:25,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-27 14:37:25,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 93. [2020-10-27 14:37:25,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-27 14:37:25,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2020-10-27 14:37:25,074 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 87 [2020-10-27 14:37:25,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:37:25,074 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2020-10-27 14:37:25,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 14:37:25,074 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2020-10-27 14:37:25,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-27 14:37:25,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:37:25,075 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:37:25,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 14:37:25,076 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:37:25,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:37:25,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1991319134, now seen corresponding path program 36 times [2020-10-27 14:37:25,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:37:25,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341656743] [2020-10-27 14:37:25,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:37:25,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:25,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:25,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:30,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:30,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 14:37:30,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:37:30,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-27 14:37:30,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:30,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 14:37:30,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-27 14:37:30,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 14:37:30,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:31,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:37:31,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:31,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:31,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:31,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:37:31,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:37:31,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:37:31,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:31,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:37:31,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:37:31,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:37:31,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:31,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2020-10-27 14:37:31,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341656743] [2020-10-27 14:37:31,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:37:31,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 14:37:31,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653511996] [2020-10-27 14:37:31,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 14:37:31,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:37:31,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 14:37:31,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 14:37:31,178 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand 40 states. [2020-10-27 14:37:32,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:37:32,480 INFO L93 Difference]: Finished difference Result 256 states and 298 transitions. [2020-10-27 14:37:32,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 14:37:32,481 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 89 [2020-10-27 14:37:32,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:37:32,483 INFO L225 Difference]: With dead ends: 256 [2020-10-27 14:37:32,483 INFO L226 Difference]: Without dead ends: 206 [2020-10-27 14:37:32,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 14:37:32,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-27 14:37:32,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 95. [2020-10-27 14:37:32,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 14:37:32,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2020-10-27 14:37:32,491 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 89 [2020-10-27 14:37:32,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:37:32,491 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2020-10-27 14:37:32,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 14:37:32,491 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2020-10-27 14:37:32,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-27 14:37:32,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:37:32,492 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:37:32,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 14:37:32,493 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:37:32,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:37:32,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1780476863, now seen corresponding path program 37 times [2020-10-27 14:37:32,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:37:32,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876148928] [2020-10-27 14:37:32,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:37:32,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:32,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:33,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:37,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:37,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 14:37:37,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:37:37,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-27 14:37:37,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:37,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 14:37:37,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-27 14:37:37,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 14:37:37,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:38,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:37:38,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:38,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:38,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:38,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:37:38,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:37:38,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:37:38,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:38,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:37:38,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:37:38,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:37:38,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:38,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2020-10-27 14:37:38,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876148928] [2020-10-27 14:37:38,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:37:38,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 14:37:38,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885077021] [2020-10-27 14:37:38,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 14:37:38,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:37:38,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 14:37:38,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 14:37:38,689 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 41 states. [2020-10-27 14:37:39,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:37:39,762 INFO L93 Difference]: Finished difference Result 262 states and 305 transitions. [2020-10-27 14:37:39,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 14:37:39,763 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 91 [2020-10-27 14:37:39,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:37:39,765 INFO L225 Difference]: With dead ends: 262 [2020-10-27 14:37:39,765 INFO L226 Difference]: Without dead ends: 211 [2020-10-27 14:37:39,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 14:37:39,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-27 14:37:39,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 97. [2020-10-27 14:37:39,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 14:37:39,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2020-10-27 14:37:39,773 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 91 [2020-10-27 14:37:39,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:37:39,774 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2020-10-27 14:37:39,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 14:37:39,774 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2020-10-27 14:37:39,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-27 14:37:39,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:37:39,775 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:37:39,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 14:37:39,775 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:37:39,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:37:39,776 INFO L82 PathProgramCache]: Analyzing trace with hash 501287426, now seen corresponding path program 38 times [2020-10-27 14:37:39,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:37:39,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519184039] [2020-10-27 14:37:39,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:37:39,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:39,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:40,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:44,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:44,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 14:37:44,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:37:44,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:37:44,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:44,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 14:37:44,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-27 14:37:44,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 14:37:44,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:45,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:37:45,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:45,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:45,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:45,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:37:45,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:37:45,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:37:45,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:45,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:37:45,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:37:45,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:37:45,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:45,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2020-10-27 14:37:45,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519184039] [2020-10-27 14:37:45,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:37:45,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 14:37:45,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940242493] [2020-10-27 14:37:45,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 14:37:45,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:37:45,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 14:37:45,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 14:37:45,991 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 42 states. [2020-10-27 14:37:47,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:37:47,034 INFO L93 Difference]: Finished difference Result 268 states and 312 transitions. [2020-10-27 14:37:47,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 14:37:47,035 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 93 [2020-10-27 14:37:47,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:37:47,038 INFO L225 Difference]: With dead ends: 268 [2020-10-27 14:37:47,038 INFO L226 Difference]: Without dead ends: 216 [2020-10-27 14:37:47,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 14:37:47,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-27 14:37:47,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 99. [2020-10-27 14:37:47,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-27 14:37:47,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2020-10-27 14:37:47,046 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 93 [2020-10-27 14:37:47,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:37:47,046 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2020-10-27 14:37:47,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 14:37:47,047 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2020-10-27 14:37:47,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-27 14:37:47,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:37:47,047 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:37:47,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 14:37:47,048 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:37:47,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:37:47,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1396211487, now seen corresponding path program 39 times [2020-10-27 14:37:47,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:37:47,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116742937] [2020-10-27 14:37:47,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:37:47,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:47,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:47,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:52,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:52,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-27 14:37:52,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:37:52,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:37:52,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:52,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 14:37:52,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-27 14:37:52,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 14:37:52,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:53,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:37:53,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:53,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:53,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:53,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:37:53,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:37:53,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:37:53,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:53,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:37:53,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:37:53,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:37:53,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:53,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-27 14:37:53,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116742937] [2020-10-27 14:37:53,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:37:53,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 14:37:53,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304073564] [2020-10-27 14:37:53,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 14:37:53,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:37:53,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 14:37:53,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 14:37:53,389 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 43 states. [2020-10-27 14:37:54,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:37:54,633 INFO L93 Difference]: Finished difference Result 274 states and 319 transitions. [2020-10-27 14:37:54,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 14:37:54,634 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 95 [2020-10-27 14:37:54,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:37:54,636 INFO L225 Difference]: With dead ends: 274 [2020-10-27 14:37:54,636 INFO L226 Difference]: Without dead ends: 221 [2020-10-27 14:37:54,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 14:37:54,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-27 14:37:54,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 101. [2020-10-27 14:37:54,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-27 14:37:54,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2020-10-27 14:37:54,647 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 95 [2020-10-27 14:37:54,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:37:54,647 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2020-10-27 14:37:54,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 14:37:54,647 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2020-10-27 14:37:54,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-27 14:37:54,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:37:54,648 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:37:54,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 14:37:54,649 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:37:54,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:37:54,649 INFO L82 PathProgramCache]: Analyzing trace with hash -2111997342, now seen corresponding path program 40 times [2020-10-27 14:37:54,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:37:54,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895063704] [2020-10-27 14:37:54,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:37:54,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:54,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:55,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking...