/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_sentinel-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:29:31,223 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:29:31,229 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:29:31,263 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:29:31,263 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:29:31,265 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:29:31,266 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:29:31,269 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:29:31,271 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:29:31,272 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:29:31,273 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:29:31,274 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:29:31,275 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:29:31,276 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:29:31,277 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:29:31,279 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:29:31,280 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:29:31,281 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:29:31,283 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:29:31,285 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:29:31,287 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:29:31,288 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:29:31,289 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:29:31,290 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:29:31,294 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:29:31,294 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:29:31,294 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:29:31,296 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:29:31,296 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:29:31,297 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:29:31,298 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:29:31,299 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:29:31,300 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:29:31,301 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:29:31,302 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:29:31,302 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:29:31,303 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:29:31,303 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:29:31,304 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:29:31,305 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:29:31,306 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:29:31,307 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 [2020-10-26 19:29:31,333 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:29:31,334 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:29:31,335 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:29:31,335 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:29:31,335 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:29:31,336 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:29:31,336 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:29:31,336 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:29:31,337 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:29:31,337 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:29:31,337 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:29:31,337 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:29:31,338 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:29:31,338 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:29:31,338 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:29:31,338 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:29:31,339 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:29:31,339 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:29:31,339 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:29:31,340 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:29:31,340 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:29:31,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:29:31,340 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:29:31,341 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:29:31,341 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:29:31,341 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:29:31,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:29:31,341 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:29:31,342 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:29:31,345 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:29:31,763 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:29:31,809 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:29:31,812 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:29:31,813 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:29:31,814 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:29:31,816 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_sentinel-2.i [2020-10-26 19:29:31,892 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/906920407/97541221281b4d3b9bf6c8f4bb49bc95/FLAGc5ae1184f [2020-10-26 19:29:32,575 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:29:32,576 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_sentinel-2.i [2020-10-26 19:29:32,584 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/906920407/97541221281b4d3b9bf6c8f4bb49bc95/FLAGc5ae1184f [2020-10-26 19:29:32,937 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/906920407/97541221281b4d3b9bf6c8f4bb49bc95 [2020-10-26 19:29:32,940 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:29:32,947 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:29:32,949 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:29:32,950 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:29:32,955 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:29:32,956 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:29:32" (1/1) ... [2020-10-26 19:29:32,962 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a85f75d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:32, skipping insertion in model container [2020-10-26 19:29:32,962 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:29:32" (1/1) ... [2020-10-26 19:29:32,971 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:29:32,989 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:29:33,162 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:29:33,173 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:29:33,196 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:29:33,215 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:29:33,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:33 WrapperNode [2020-10-26 19:29:33,216 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:29:33,218 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:29:33,218 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:29:33,218 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:29:33,233 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:33" (1/1) ... [2020-10-26 19:29:33,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:33" (1/1) ... [2020-10-26 19:29:33,243 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:33" (1/1) ... [2020-10-26 19:29:33,243 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:33" (1/1) ... [2020-10-26 19:29:33,251 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:33" (1/1) ... [2020-10-26 19:29:33,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:33" (1/1) ... [2020-10-26 19:29:33,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:33" (1/1) ... [2020-10-26 19:29:33,261 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:29:33,262 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:29:33,262 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:29:33,263 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:29:33,264 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:33" (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 [2020-10-26 19:29:33,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:29:33,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:29:33,351 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:29:33,351 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:29:33,352 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:29:33,352 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:29:33,352 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:29:33,352 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:29:33,353 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:29:33,353 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:29:33,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:29:33,353 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:29:33,354 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:29:33,354 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:29:33,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:29:33,354 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:29:33,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:29:33,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:29:33,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:29:33,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:29:33,707 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:29:33,707 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-26 19:29:33,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:29:33 BoogieIcfgContainer [2020-10-26 19:29:33,710 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:29:33,712 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:29:33,712 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:29:33,717 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:29:33,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:29:32" (1/3) ... [2020-10-26 19:29:33,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ff27263 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:29:33, skipping insertion in model container [2020-10-26 19:29:33,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:33" (2/3) ... [2020-10-26 19:29:33,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ff27263 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:29:33, skipping insertion in model container [2020-10-26 19:29:33,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:29:33" (3/3) ... [2020-10-26 19:29:33,721 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_sentinel-2.i [2020-10-26 19:29:33,736 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:29:33,741 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:29:33,760 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:29:33,802 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:29:33,802 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:29:33,803 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:29:33,803 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:29:33,803 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:29:33,803 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:29:33,803 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:29:33,804 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:29:33,824 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-10-26 19:29:33,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-26 19:29:33,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:33,832 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:33,833 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:33,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:33,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1039837916, now seen corresponding path program 1 times [2020-10-26 19:29:33,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:33,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919115529] [2020-10-26 19:29:33,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:33,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:34,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:34,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:34,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:34,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:34,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-26 19:29:34,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:29:34,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 565 [2020-10-26 19:29:34,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:34,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:34,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:29:34,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:34,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:29:34,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:34,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:34,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:34,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:34,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:34,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:34,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:29:34,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:34,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:34,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:34,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:34,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:34,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:34,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919115529] [2020-10-26 19:29:34,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:29:34,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 19:29:34,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495658507] [2020-10-26 19:29:34,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 19:29:34,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:34,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 19:29:34,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:29:34,718 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2020-10-26 19:29:34,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:34,827 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2020-10-26 19:29:34,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 19:29:34,830 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-26 19:29:34,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:34,838 INFO L225 Difference]: With dead ends: 45 [2020-10-26 19:29:34,838 INFO L226 Difference]: Without dead ends: 18 [2020-10-26 19:29:34,842 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 [2020-10-26 19:29:34,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-26 19:29:34,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-26 19:29:34,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-26 19:29:34,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-10-26 19:29:34,887 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2020-10-26 19:29:34,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:34,887 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-10-26 19:29:34,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 19:29:34,888 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-10-26 19:29:34,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-26 19:29:34,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:34,889 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:34,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:29:34,889 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:34,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:34,890 INFO L82 PathProgramCache]: Analyzing trace with hash 971041850, now seen corresponding path program 1 times [2020-10-26 19:29:34,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:34,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078701763] [2020-10-26 19:29:34,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:34,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:34,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:34,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:35,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:35,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-26 19:29:35,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:29:35,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 265 [2020-10-26 19:29:35,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:35,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:29:35,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:35,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:29:35,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:35,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:35,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:35,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:35,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:35,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:35,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:35,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:29:35,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:35,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:35,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:35,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:35,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:29:35,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:35,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078701763] [2020-10-26 19:29:35,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:29:35,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:29:35,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505430529] [2020-10-26 19:29:35,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:29:35,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:35,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:29:35,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:29:35,305 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 4 states. [2020-10-26 19:29:35,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:35,406 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-10-26 19:29:35,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:29:35,408 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-26 19:29:35,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:35,409 INFO L225 Difference]: With dead ends: 30 [2020-10-26 19:29:35,409 INFO L226 Difference]: Without dead ends: 20 [2020-10-26 19:29:35,411 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 [2020-10-26 19:29:35,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-26 19:29:35,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-10-26 19:29:35,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-26 19:29:35,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-26 19:29:35,425 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2020-10-26 19:29:35,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:35,427 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-26 19:29:35,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:29:35,427 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-26 19:29:35,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-26 19:29:35,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:35,429 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:35,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:29:35,429 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:35,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:35,434 INFO L82 PathProgramCache]: Analyzing trace with hash -634597988, now seen corresponding path program 1 times [2020-10-26 19:29:35,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:35,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253648822] [2020-10-26 19:29:35,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:35,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:35,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:35,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:35,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:35,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 19:29:35,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:29:35,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 328 [2020-10-26 19:29:35,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:35,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:29:35,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:35,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:29:35,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:35,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:35,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:35,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:35,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:35,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:35,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:35,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:29:35,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:35,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:35,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:35,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:35,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:35,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:35,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253648822] [2020-10-26 19:29:35,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:35,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:29:35,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241055422] [2020-10-26 19:29:35,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:29:35,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:35,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:29:35,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:29:35,880 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 5 states. [2020-10-26 19:29:35,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:35,971 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-10-26 19:29:35,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:29:35,972 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-26 19:29:35,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:35,972 INFO L225 Difference]: With dead ends: 32 [2020-10-26 19:29:35,973 INFO L226 Difference]: Without dead ends: 22 [2020-10-26 19:29:35,973 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 [2020-10-26 19:29:35,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-26 19:29:35,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-26 19:29:35,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-26 19:29:35,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-26 19:29:35,980 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2020-10-26 19:29:35,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:35,980 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-26 19:29:35,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:29:35,981 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-26 19:29:35,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-26 19:29:35,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:35,982 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:35,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:29:35,982 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:35,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:35,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1761223042, now seen corresponding path program 2 times [2020-10-26 19:29:35,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:35,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116734093] [2020-10-26 19:29:35,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:35,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:36,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:36,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:36,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:36,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-26 19:29:36,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:29:36,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 265 [2020-10-26 19:29:36,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:36,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:29:36,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:36,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:29:36,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:29:36,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:36,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:36,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:36,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:36,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:36,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:36,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 19:29:36,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:36,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:36,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:36,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:36,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-26 19:29:36,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:36,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116734093] [2020-10-26 19:29:36,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:36,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:29:36,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086260791] [2020-10-26 19:29:36,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:29:36,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:36,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:29:36,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:29:36,386 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 6 states. [2020-10-26 19:29:36,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:36,530 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-10-26 19:29:36,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:29:36,531 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-26 19:29:36,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:36,532 INFO L225 Difference]: With dead ends: 34 [2020-10-26 19:29:36,532 INFO L226 Difference]: Without dead ends: 24 [2020-10-26 19:29:36,532 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 [2020-10-26 19:29:36,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-26 19:29:36,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-26 19:29:36,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-26 19:29:36,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-26 19:29:36,545 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2020-10-26 19:29:36,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:36,546 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-26 19:29:36,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:29:36,546 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-26 19:29:36,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-26 19:29:36,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:36,547 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:36,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:29:36,547 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:36,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:36,548 INFO L82 PathProgramCache]: Analyzing trace with hash -2116141344, now seen corresponding path program 3 times [2020-10-26 19:29:36,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:36,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111625041] [2020-10-26 19:29:36,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:36,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:36,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:36,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:36,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:36,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 19:29:36,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:29:36,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 328 [2020-10-26 19:29:36,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:36,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:29:36,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:36,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:29:36,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:37,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:37,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:37,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:37,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:37,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:37,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:37,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:29:37,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:37,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:37,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:37,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:37,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:37,037 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:37,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111625041] [2020-10-26 19:29:37,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:37,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:29:37,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699954363] [2020-10-26 19:29:37,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:29:37,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:37,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:29:37,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:29:37,040 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 7 states. [2020-10-26 19:29:37,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:37,143 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-10-26 19:29:37,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:29:37,144 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-26 19:29:37,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:37,145 INFO L225 Difference]: With dead ends: 36 [2020-10-26 19:29:37,145 INFO L226 Difference]: Without dead ends: 26 [2020-10-26 19:29:37,146 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 [2020-10-26 19:29:37,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-26 19:29:37,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-10-26 19:29:37,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-26 19:29:37,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-10-26 19:29:37,152 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2020-10-26 19:29:37,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:37,152 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-10-26 19:29:37,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:29:37,153 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-10-26 19:29:37,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-26 19:29:37,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:37,154 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:37,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:29:37,154 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:37,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:37,155 INFO L82 PathProgramCache]: Analyzing trace with hash 404754114, now seen corresponding path program 4 times [2020-10-26 19:29:37,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:37,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339072809] [2020-10-26 19:29:37,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:37,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:37,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:37,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:37,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:37,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:29:37,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:29:37,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 425 [2020-10-26 19:29:37,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:37,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:29:37,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:37,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:29:37,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:37,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:37,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:37,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:37,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:37,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:37,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:37,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:29:37,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:37,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:37,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:37,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:37,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:37,716 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:37,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339072809] [2020-10-26 19:29:37,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:37,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:29:37,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258189870] [2020-10-26 19:29:37,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:29:37,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:37,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:29:37,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:29:37,719 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 8 states. [2020-10-26 19:29:37,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:37,847 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-10-26 19:29:37,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:29:37,848 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-26 19:29:37,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:37,849 INFO L225 Difference]: With dead ends: 38 [2020-10-26 19:29:37,849 INFO L226 Difference]: Without dead ends: 28 [2020-10-26 19:29:37,850 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 [2020-10-26 19:29:37,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-26 19:29:37,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-26 19:29:37,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-26 19:29:37,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-10-26 19:29:37,855 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2020-10-26 19:29:37,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:37,856 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-10-26 19:29:37,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:29:37,856 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-10-26 19:29:37,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-26 19:29:37,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:37,857 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:37,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:29:37,858 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:37,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:37,858 INFO L82 PathProgramCache]: Analyzing trace with hash 623734308, now seen corresponding path program 5 times [2020-10-26 19:29:37,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:37,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399678881] [2020-10-26 19:29:37,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:37,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:37,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:37,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:38,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:38,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 19:29:38,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:29:38,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 487 [2020-10-26 19:29:38,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:38,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:29:38,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:38,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:29:38,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:38,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:38,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:38,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:38,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:38,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:38,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:38,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:29:38,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:38,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:38,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:38,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:38,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:38,489 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:38,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399678881] [2020-10-26 19:29:38,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:38,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:29:38,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180356877] [2020-10-26 19:29:38,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:29:38,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:38,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:29:38,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:29:38,492 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-10-26 19:29:38,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:38,617 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-10-26 19:29:38,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:29:38,618 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-26 19:29:38,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:38,619 INFO L225 Difference]: With dead ends: 40 [2020-10-26 19:29:38,619 INFO L226 Difference]: Without dead ends: 30 [2020-10-26 19:29:38,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:29:38,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-26 19:29:38,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-26 19:29:38,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-26 19:29:38,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-26 19:29:38,625 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2020-10-26 19:29:38,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:38,625 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-26 19:29:38,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:29:38,625 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-26 19:29:38,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-26 19:29:38,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:38,626 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:38,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:29:38,627 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:38,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:38,627 INFO L82 PathProgramCache]: Analyzing trace with hash 610303238, now seen corresponding path program 6 times [2020-10-26 19:29:38,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:38,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284280212] [2020-10-26 19:29:38,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:38,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:38,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:38,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:39,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:39,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 19:29:39,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:29:39,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 559 [2020-10-26 19:29:39,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:39,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:29:39,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:39,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:29:39,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:39,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:39,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:39,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:39,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:39,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:39,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:39,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:29:39,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:39,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:39,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:39,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:39,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:39,391 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:39,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284280212] [2020-10-26 19:29:39,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:39,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:29:39,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553053887] [2020-10-26 19:29:39,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:29:39,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:39,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:29:39,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:29:39,394 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 10 states. [2020-10-26 19:29:39,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:39,515 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-10-26 19:29:39,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:29:39,516 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-26 19:29:39,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:39,517 INFO L225 Difference]: With dead ends: 42 [2020-10-26 19:29:39,517 INFO L226 Difference]: Without dead ends: 32 [2020-10-26 19:29:39,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:29:39,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-26 19:29:39,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-26 19:29:39,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-26 19:29:39,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-10-26 19:29:39,523 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2020-10-26 19:29:39,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:39,524 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-10-26 19:29:39,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:29:39,524 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-10-26 19:29:39,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-26 19:29:39,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:39,525 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:39,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:29:39,525 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:39,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:39,526 INFO L82 PathProgramCache]: Analyzing trace with hash 587946856, now seen corresponding path program 7 times [2020-10-26 19:29:39,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:39,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270313258] [2020-10-26 19:29:39,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:39,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:39,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:39,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:40,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:40,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 19:29:40,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:29:40,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 712 [2020-10-26 19:29:40,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:40,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:29:40,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:40,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:29:40,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:40,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:40,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:40,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:40,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:40,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:40,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:40,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:29:40,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:40,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:40,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:40,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:40,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:40,428 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:40,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270313258] [2020-10-26 19:29:40,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:40,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:29:40,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889205117] [2020-10-26 19:29:40,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:29:40,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:40,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:29:40,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:29:40,431 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 11 states. [2020-10-26 19:29:40,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:40,546 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-10-26 19:29:40,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:29:40,547 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-26 19:29:40,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:40,548 INFO L225 Difference]: With dead ends: 44 [2020-10-26 19:29:40,548 INFO L226 Difference]: Without dead ends: 34 [2020-10-26 19:29:40,549 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 [2020-10-26 19:29:40,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-26 19:29:40,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-26 19:29:40,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-26 19:29:40,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-10-26 19:29:40,555 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2020-10-26 19:29:40,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:40,555 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-10-26 19:29:40,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:29:40,555 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-10-26 19:29:40,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-26 19:29:40,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:40,556 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:40,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:29:40,556 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:40,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:40,557 INFO L82 PathProgramCache]: Analyzing trace with hash 578300234, now seen corresponding path program 8 times [2020-10-26 19:29:40,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:40,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1121328144] [2020-10-26 19:29:40,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:40,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:40,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:40,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:41,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:41,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 19:29:41,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:29:41,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 959 [2020-10-26 19:29:41,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:41,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:29:41,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:41,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:29:41,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:41,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:41,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:41,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:41,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:41,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:41,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:41,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:29:41,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:41,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:41,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:41,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:41,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:41,729 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:41,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1121328144] [2020-10-26 19:29:41,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:41,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:29:41,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289942633] [2020-10-26 19:29:41,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:29:41,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:41,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:29:41,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:29:41,732 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 12 states. [2020-10-26 19:29:41,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:41,890 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-10-26 19:29:41,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:29:41,891 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-26 19:29:41,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:41,892 INFO L225 Difference]: With dead ends: 46 [2020-10-26 19:29:41,892 INFO L226 Difference]: Without dead ends: 36 [2020-10-26 19:29:41,893 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 [2020-10-26 19:29:41,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-26 19:29:41,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-26 19:29:41,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-26 19:29:41,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-10-26 19:29:41,898 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-10-26 19:29:41,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:41,898 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-10-26 19:29:41,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:29:41,898 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-10-26 19:29:41,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 19:29:41,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:41,900 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:41,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:29:41,900 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:41,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:41,901 INFO L82 PathProgramCache]: Analyzing trace with hash -102168916, now seen corresponding path program 9 times [2020-10-26 19:29:41,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:41,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425819679] [2020-10-26 19:29:41,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:41,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:41,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:41,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:42,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:42,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 19:29:42,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:29:42,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1061 [2020-10-26 19:29:42,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:42,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:29:42,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:42,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:29:42,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:43,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:43,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:43,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:43,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:43,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:43,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:43,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:29:43,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:43,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:43,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:43,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:43,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:43,271 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:43,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425819679] [2020-10-26 19:29:43,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:43,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:29:43,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595677800] [2020-10-26 19:29:43,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:29:43,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:43,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:29:43,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:29:43,276 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 13 states. [2020-10-26 19:29:43,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:43,426 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-10-26 19:29:43,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:29:43,427 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-26 19:29:43,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:43,432 INFO L225 Difference]: With dead ends: 48 [2020-10-26 19:29:43,432 INFO L226 Difference]: Without dead ends: 38 [2020-10-26 19:29:43,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:29:43,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-26 19:29:43,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-26 19:29:43,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-26 19:29:43,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-10-26 19:29:43,445 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2020-10-26 19:29:43,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:43,445 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-10-26 19:29:43,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:29:43,446 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-10-26 19:29:43,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-26 19:29:43,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:43,448 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:43,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:29:43,449 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:43,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:43,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1197993074, now seen corresponding path program 10 times [2020-10-26 19:29:43,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:43,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960940232] [2020-10-26 19:29:43,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:43,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:43,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:43,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:44,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:44,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 19:29:44,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:29:44,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1053 [2020-10-26 19:29:44,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:44,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:29:44,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:44,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:29:44,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:44,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:44,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:44,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:44,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:44,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:44,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:29:44,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:44,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:44,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:44,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:44,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:44,828 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:44,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960940232] [2020-10-26 19:29:44,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:44,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:29:44,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393284592] [2020-10-26 19:29:44,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:29:44,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:44,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:29:44,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:29:44,830 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 14 states. [2020-10-26 19:29:44,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:44,991 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-10-26 19:29:44,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:29:44,991 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-26 19:29:44,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:44,992 INFO L225 Difference]: With dead ends: 50 [2020-10-26 19:29:44,992 INFO L226 Difference]: Without dead ends: 40 [2020-10-26 19:29:44,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:29:44,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-26 19:29:44,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-26 19:29:45,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-26 19:29:45,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-10-26 19:29:45,002 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2020-10-26 19:29:45,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:45,002 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-10-26 19:29:45,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:29:45,003 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-10-26 19:29:45,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-26 19:29:45,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:45,007 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:45,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:29:45,007 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:45,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:45,008 INFO L82 PathProgramCache]: Analyzing trace with hash -2018021392, now seen corresponding path program 11 times [2020-10-26 19:29:45,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:45,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128791366] [2020-10-26 19:29:45,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:45,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:45,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:45,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:46,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:46,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:29:46,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:29:46,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1228 [2020-10-26 19:29:46,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:46,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:29:46,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:46,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:29:46,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:46,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:46,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:46,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:46,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:46,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:46,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:46,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:29:46,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:46,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:46,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:46,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:46,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:46,579 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:46,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128791366] [2020-10-26 19:29:46,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:46,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:29:46,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523558513] [2020-10-26 19:29:46,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:29:46,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:46,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:29:46,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:29:46,583 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 15 states. [2020-10-26 19:29:46,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:46,785 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-10-26 19:29:46,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:29:46,786 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-26 19:29:46,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:46,786 INFO L225 Difference]: With dead ends: 52 [2020-10-26 19:29:46,787 INFO L226 Difference]: Without dead ends: 42 [2020-10-26 19:29:46,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:29:46,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-26 19:29:46,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-26 19:29:46,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-26 19:29:46,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-10-26 19:29:46,797 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2020-10-26 19:29:46,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:46,799 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-10-26 19:29:46,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:29:46,799 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-10-26 19:29:46,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-26 19:29:46,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:46,800 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:46,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:29:46,800 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:46,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:46,801 INFO L82 PathProgramCache]: Analyzing trace with hash 208747474, now seen corresponding path program 12 times [2020-10-26 19:29:46,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:46,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1459789851] [2020-10-26 19:29:46,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:46,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:46,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:46,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:48,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:48,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:29:48,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:29:48,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1483 [2020-10-26 19:29:48,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:48,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:29:48,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:48,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:29:48,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:48,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:48,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:48,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:48,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:48,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:48,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:48,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:29:48,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:48,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:48,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:48,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:48,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:48,634 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:48,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1459789851] [2020-10-26 19:29:48,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:48,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:29:48,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778152633] [2020-10-26 19:29:48,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:29:48,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:48,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:29:48,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:29:48,638 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 16 states. [2020-10-26 19:29:48,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:48,766 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-10-26 19:29:48,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:29:48,767 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-26 19:29:48,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:48,768 INFO L225 Difference]: With dead ends: 54 [2020-10-26 19:29:48,768 INFO L226 Difference]: Without dead ends: 44 [2020-10-26 19:29:48,769 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 [2020-10-26 19:29:48,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-26 19:29:48,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-26 19:29:48,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-26 19:29:48,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-10-26 19:29:48,780 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2020-10-26 19:29:48,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:48,781 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-10-26 19:29:48,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:29:48,781 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-10-26 19:29:48,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-26 19:29:48,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:48,782 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:48,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:29:48,782 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:48,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:48,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1239914292, now seen corresponding path program 13 times [2020-10-26 19:29:48,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:48,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303668603] [2020-10-26 19:29:48,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:48,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:48,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:48,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:50,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:50,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:29:50,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:29:50,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1506 [2020-10-26 19:29:50,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:50,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:29:50,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:50,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:29:50,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:50,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:50,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:50,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:50,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:50,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:50,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:50,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:29:50,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:50,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:50,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:50,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:50,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:50,530 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:50,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303668603] [2020-10-26 19:29:50,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:50,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:29:50,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706301441] [2020-10-26 19:29:50,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:29:50,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:50,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:29:50,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:29:50,533 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 17 states. [2020-10-26 19:29:50,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:50,650 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-10-26 19:29:50,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:29:50,651 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-10-26 19:29:50,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:50,652 INFO L225 Difference]: With dead ends: 56 [2020-10-26 19:29:50,652 INFO L226 Difference]: Without dead ends: 46 [2020-10-26 19:29:50,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:29:50,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-26 19:29:50,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-26 19:29:50,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-26 19:29:50,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-10-26 19:29:50,657 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2020-10-26 19:29:50,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:50,658 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-10-26 19:29:50,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:29:50,658 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-10-26 19:29:50,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-26 19:29:50,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:50,659 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:50,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:29:50,659 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:50,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:50,660 INFO L82 PathProgramCache]: Analyzing trace with hash 53781014, now seen corresponding path program 14 times [2020-10-26 19:29:50,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:50,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598936514] [2020-10-26 19:29:50,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:50,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:50,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:50,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:52,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:52,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 19:29:52,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:29:52,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1612 [2020-10-26 19:29:52,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:52,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:29:52,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:52,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:29:52,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:52,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:52,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:52,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:52,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:52,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:52,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:52,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:29:52,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:52,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:52,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:52,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:52,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:52,549 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:52,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598936514] [2020-10-26 19:29:52,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:52,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:29:52,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318279576] [2020-10-26 19:29:52,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:29:52,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:52,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:29:52,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:29:52,555 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 18 states. [2020-10-26 19:29:52,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:52,720 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-10-26 19:29:52,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:29:52,721 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2020-10-26 19:29:52,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:52,722 INFO L225 Difference]: With dead ends: 58 [2020-10-26 19:29:52,722 INFO L226 Difference]: Without dead ends: 48 [2020-10-26 19:29:52,723 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 [2020-10-26 19:29:52,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-26 19:29:52,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-26 19:29:52,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-26 19:29:52,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-26 19:29:52,728 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2020-10-26 19:29:52,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:52,728 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-26 19:29:52,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:29:52,728 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-26 19:29:52,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-26 19:29:52,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:52,729 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:52,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:29:52,729 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:52,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:52,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1653965704, now seen corresponding path program 15 times [2020-10-26 19:29:52,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:52,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745470121] [2020-10-26 19:29:52,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:52,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:52,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:52,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:54,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:54,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 19:29:54,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:29:54,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1720 [2020-10-26 19:29:54,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:54,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:29:54,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:54,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:29:54,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:54,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:54,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:54,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:54,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:54,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:54,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:54,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:29:54,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:54,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:54,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:54,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:54,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:54,730 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:54,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745470121] [2020-10-26 19:29:54,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:54,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:29:54,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494353540] [2020-10-26 19:29:54,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:29:54,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:54,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:29:54,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:29:54,736 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 19 states. [2020-10-26 19:29:54,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:54,884 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-10-26 19:29:54,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:29:54,885 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 46 [2020-10-26 19:29:54,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:54,886 INFO L225 Difference]: With dead ends: 60 [2020-10-26 19:29:54,886 INFO L226 Difference]: Without dead ends: 50 [2020-10-26 19:29:54,887 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 [2020-10-26 19:29:54,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-26 19:29:54,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-26 19:29:54,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-26 19:29:54,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-10-26 19:29:54,894 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2020-10-26 19:29:54,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:54,894 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-10-26 19:29:54,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:29:54,894 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-10-26 19:29:54,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-26 19:29:54,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:54,895 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:54,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:29:54,895 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:54,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:54,896 INFO L82 PathProgramCache]: Analyzing trace with hash -2121054630, now seen corresponding path program 16 times [2020-10-26 19:29:54,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:54,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842933886] [2020-10-26 19:29:54,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:54,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:54,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:54,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:56,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:56,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 19:29:56,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:29:56,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1938 [2020-10-26 19:29:56,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:56,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:29:56,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:56,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:29:56,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:57,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:57,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:57,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:57,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:57,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:57,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:57,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:29:57,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:57,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:57,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:57,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:57,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:57,298 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:57,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842933886] [2020-10-26 19:29:57,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:57,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:29:57,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008237102] [2020-10-26 19:29:57,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:29:57,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:57,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:29:57,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:29:57,304 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 20 states. [2020-10-26 19:29:57,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:57,482 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-10-26 19:29:57,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:29:57,482 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-10-26 19:29:57,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:57,483 INFO L225 Difference]: With dead ends: 62 [2020-10-26 19:29:57,483 INFO L226 Difference]: Without dead ends: 52 [2020-10-26 19:29:57,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:29:57,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-26 19:29:57,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-26 19:29:57,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-26 19:29:57,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-10-26 19:29:57,491 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2020-10-26 19:29:57,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:57,492 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-10-26 19:29:57,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:29:57,492 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-10-26 19:29:57,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-26 19:29:57,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:57,492 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:57,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:29:57,493 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:57,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:57,493 INFO L82 PathProgramCache]: Analyzing trace with hash -21946436, now seen corresponding path program 17 times [2020-10-26 19:29:57,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:57,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1012925045] [2020-10-26 19:29:57,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:57,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:57,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:57,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:59,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:59,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 19:29:59,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:29:59,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2144 [2020-10-26 19:29:59,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:59,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:29:59,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:59,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:29:59,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:00,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:00,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:00,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:00,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:00,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:00,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:00,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:30:00,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:00,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:00,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:00,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:00,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:00,028 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:30:00,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1012925045] [2020-10-26 19:30:00,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:00,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:30:00,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232572946] [2020-10-26 19:30:00,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:30:00,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:00,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:30:00,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:30:00,031 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 21 states. [2020-10-26 19:30:00,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:00,198 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-10-26 19:30:00,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:30:00,198 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2020-10-26 19:30:00,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:00,199 INFO L225 Difference]: With dead ends: 64 [2020-10-26 19:30:00,199 INFO L226 Difference]: Without dead ends: 54 [2020-10-26 19:30:00,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:30:00,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-26 19:30:00,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-26 19:30:00,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-26 19:30:00,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-10-26 19:30:00,211 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2020-10-26 19:30:00,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:00,212 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-10-26 19:30:00,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:30:00,212 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-10-26 19:30:00,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-26 19:30:00,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:00,213 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:00,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:30:00,216 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:00,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:00,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1413601122, now seen corresponding path program 18 times [2020-10-26 19:30:00,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:00,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036365931] [2020-10-26 19:30:00,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:00,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:00,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:00,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:02,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:02,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:30:02,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:02,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2073 [2020-10-26 19:30:02,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:02,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:30:02,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:02,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:30:02,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:02,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:02,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:02,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:02,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:02,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:02,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:02,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:30:02,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:02,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:02,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:02,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:02,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:02,747 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:30:02,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036365931] [2020-10-26 19:30:02,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:02,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:30:02,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778511980] [2020-10-26 19:30:02,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:30:02,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:02,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:30:02,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:30:02,750 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 22 states. [2020-10-26 19:30:02,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:02,983 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-10-26 19:30:02,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:30:02,984 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-10-26 19:30:02,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:02,985 INFO L225 Difference]: With dead ends: 66 [2020-10-26 19:30:02,985 INFO L226 Difference]: Without dead ends: 56 [2020-10-26 19:30:02,986 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 [2020-10-26 19:30:02,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-26 19:30:02,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-26 19:30:02,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-26 19:30:02,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-10-26 19:30:02,992 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2020-10-26 19:30:02,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:02,992 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-10-26 19:30:02,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:30:02,992 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-10-26 19:30:02,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-26 19:30:02,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:02,993 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:02,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:30:02,993 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:02,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:02,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1236041984, now seen corresponding path program 19 times [2020-10-26 19:30:02,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:02,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853831467] [2020-10-26 19:30:02,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:03,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:03,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:03,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:05,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:05,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:30:05,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:05,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2192 [2020-10-26 19:30:05,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:05,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:30:05,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:05,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:30:05,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:05,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:05,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:05,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:05,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:05,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:05,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:05,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:30:05,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:05,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:05,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:05,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:05,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:05,685 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:30:05,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853831467] [2020-10-26 19:30:05,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:05,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:30:05,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079277629] [2020-10-26 19:30:05,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:30:05,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:05,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:30:05,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:30:05,691 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 23 states. [2020-10-26 19:30:05,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:05,894 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-10-26 19:30:05,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:30:05,895 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2020-10-26 19:30:05,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:05,896 INFO L225 Difference]: With dead ends: 68 [2020-10-26 19:30:05,896 INFO L226 Difference]: Without dead ends: 58 [2020-10-26 19:30:05,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:30:05,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-26 19:30:05,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-26 19:30:05,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-26 19:30:05,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-10-26 19:30:05,902 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2020-10-26 19:30:05,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:05,903 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-10-26 19:30:05,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:30:05,903 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-10-26 19:30:05,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-26 19:30:05,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:05,903 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:05,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:30:05,904 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:05,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:05,907 INFO L82 PathProgramCache]: Analyzing trace with hash 627460322, now seen corresponding path program 20 times [2020-10-26 19:30:05,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:05,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233751887] [2020-10-26 19:30:05,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:05,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:05,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:05,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:07,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:07,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 19:30:07,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:07,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2013 [2020-10-26 19:30:07,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:07,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:30:07,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:07,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:30:07,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:08,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:08,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:08,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:08,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:08,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:08,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:08,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:08,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:08,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:08,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:08,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:08,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:08,339 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:30:08,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233751887] [2020-10-26 19:30:08,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:08,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:30:08,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049129980] [2020-10-26 19:30:08,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:30:08,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:08,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:30:08,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:30:08,342 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 24 states. [2020-10-26 19:30:08,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:08,474 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2020-10-26 19:30:08,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:30:08,477 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 56 [2020-10-26 19:30:08,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:08,477 INFO L225 Difference]: With dead ends: 70 [2020-10-26 19:30:08,477 INFO L226 Difference]: Without dead ends: 60 [2020-10-26 19:30:08,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:30:08,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-26 19:30:08,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-26 19:30:08,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-26 19:30:08,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-10-26 19:30:08,486 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2020-10-26 19:30:08,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:08,486 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-10-26 19:30:08,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:30:08,486 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-10-26 19:30:08,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-26 19:30:08,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:08,487 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:08,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:30:08,487 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:08,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:08,487 INFO L82 PathProgramCache]: Analyzing trace with hash -103964604, now seen corresponding path program 21 times [2020-10-26 19:30:08,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:08,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830526552] [2020-10-26 19:30:08,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:08,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:08,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:08,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:10,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:10,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-26 19:30:10,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:10,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2212 [2020-10-26 19:30:10,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:10,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:30:10,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:10,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:30:10,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:11,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:11,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:11,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:11,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:11,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:11,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:11,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:11,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:11,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:11,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:11,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:11,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:11,134 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:30:11,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830526552] [2020-10-26 19:30:11,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:11,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:30:11,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014602553] [2020-10-26 19:30:11,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:30:11,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:11,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:30:11,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:30:11,136 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 25 states. [2020-10-26 19:30:11,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:11,267 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-10-26 19:30:11,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:30:11,268 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 58 [2020-10-26 19:30:11,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:11,269 INFO L225 Difference]: With dead ends: 72 [2020-10-26 19:30:11,269 INFO L226 Difference]: Without dead ends: 62 [2020-10-26 19:30:11,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:30:11,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-26 19:30:11,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-26 19:30:11,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-26 19:30:11,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-10-26 19:30:11,276 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2020-10-26 19:30:11,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:11,276 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-10-26 19:30:11,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:30:11,276 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-10-26 19:30:11,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-26 19:30:11,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:11,277 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:11,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:30:11,277 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:11,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:11,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1371318054, now seen corresponding path program 22 times [2020-10-26 19:30:11,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:11,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102513920] [2020-10-26 19:30:11,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:11,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:11,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:11,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:13,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:13,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 19:30:13,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:13,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2226 [2020-10-26 19:30:13,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:13,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:30:13,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:13,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:30:13,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:14,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:14,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:14,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:14,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:14,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:14,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:14,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:14,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:14,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:14,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:14,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:14,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:14,017 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:30:14,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102513920] [2020-10-26 19:30:14,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:14,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:30:14,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284343459] [2020-10-26 19:30:14,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:30:14,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:14,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:30:14,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:30:14,020 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 26 states. [2020-10-26 19:30:14,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:14,212 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2020-10-26 19:30:14,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:30:14,212 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 60 [2020-10-26 19:30:14,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:14,213 INFO L225 Difference]: With dead ends: 74 [2020-10-26 19:30:14,213 INFO L226 Difference]: Without dead ends: 64 [2020-10-26 19:30:14,214 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 [2020-10-26 19:30:14,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-26 19:30:14,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-10-26 19:30:14,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-26 19:30:14,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-10-26 19:30:14,223 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2020-10-26 19:30:14,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:14,223 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-10-26 19:30:14,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:30:14,223 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-10-26 19:30:14,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-26 19:30:14,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:14,224 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:14,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:30:14,225 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:14,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:14,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1778744712, now seen corresponding path program 23 times [2020-10-26 19:30:14,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:14,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [655095394] [2020-10-26 19:30:14,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:14,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:14,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:14,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:16,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:16,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-26 19:30:16,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:16,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2476 [2020-10-26 19:30:16,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:16,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:30:16,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:16,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:30:16,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:17,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:17,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:17,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:17,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:17,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:17,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:17,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:17,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:17,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:17,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:17,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:17,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:17,245 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:30:17,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [655095394] [2020-10-26 19:30:17,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:17,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:30:17,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974927212] [2020-10-26 19:30:17,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:30:17,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:17,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:30:17,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:30:17,247 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 27 states. [2020-10-26 19:30:17,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:17,519 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2020-10-26 19:30:17,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:30:17,520 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 62 [2020-10-26 19:30:17,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:17,521 INFO L225 Difference]: With dead ends: 76 [2020-10-26 19:30:17,521 INFO L226 Difference]: Without dead ends: 66 [2020-10-26 19:30:17,522 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 [2020-10-26 19:30:17,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-26 19:30:17,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-26 19:30:17,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-26 19:30:17,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2020-10-26 19:30:17,529 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2020-10-26 19:30:17,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:17,530 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2020-10-26 19:30:17,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:30:17,530 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2020-10-26 19:30:17,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-26 19:30:17,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:17,531 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:17,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:30:17,531 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:17,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:17,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1821228182, now seen corresponding path program 24 times [2020-10-26 19:30:17,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:17,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504404283] [2020-10-26 19:30:17,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:17,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:17,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:17,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:20,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:20,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-26 19:30:20,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:20,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2684 [2020-10-26 19:30:20,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:20,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:30:20,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:20,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:30:20,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:20,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:20,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:20,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:20,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:20,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:20,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:20,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:20,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:20,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:20,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:20,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:20,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:20,808 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:30:20,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504404283] [2020-10-26 19:30:20,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:20,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:30:20,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370806952] [2020-10-26 19:30:20,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:30:20,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:20,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:30:20,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:30:20,811 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 28 states. [2020-10-26 19:30:21,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:21,036 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-10-26 19:30:21,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:30:21,037 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 64 [2020-10-26 19:30:21,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:21,038 INFO L225 Difference]: With dead ends: 78 [2020-10-26 19:30:21,038 INFO L226 Difference]: Without dead ends: 68 [2020-10-26 19:30:21,038 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 [2020-10-26 19:30:21,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-26 19:30:21,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-10-26 19:30:21,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-26 19:30:21,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-10-26 19:30:21,043 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2020-10-26 19:30:21,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:21,043 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-10-26 19:30:21,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:30:21,043 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-10-26 19:30:21,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-26 19:30:21,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:21,044 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:21,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:30:21,044 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:21,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:21,045 INFO L82 PathProgramCache]: Analyzing trace with hash 348461260, now seen corresponding path program 25 times [2020-10-26 19:30:21,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:21,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678590080] [2020-10-26 19:30:21,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:21,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:21,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:21,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:24,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:24,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 19:30:24,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:24,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3016 [2020-10-26 19:30:24,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:24,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:30:24,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:24,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:30:24,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:24,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:24,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:24,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:24,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:24,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:24,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:24,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:24,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:24,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:24,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:24,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:24,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:24,658 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:30:24,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678590080] [2020-10-26 19:30:24,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:24,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:30:24,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322060761] [2020-10-26 19:30:24,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:30:24,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:24,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:30:24,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:30:24,660 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 29 states. [2020-10-26 19:30:24,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:24,913 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2020-10-26 19:30:24,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:30:24,914 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 66 [2020-10-26 19:30:24,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:24,915 INFO L225 Difference]: With dead ends: 80 [2020-10-26 19:30:24,916 INFO L226 Difference]: Without dead ends: 70 [2020-10-26 19:30:24,917 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 [2020-10-26 19:30:24,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-26 19:30:24,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-26 19:30:24,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-26 19:30:24,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-10-26 19:30:24,921 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2020-10-26 19:30:24,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:24,921 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-10-26 19:30:24,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:30:24,922 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-10-26 19:30:24,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-26 19:30:24,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:24,922 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:24,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:30:24,923 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:24,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:24,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1934090834, now seen corresponding path program 26 times [2020-10-26 19:30:24,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:24,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886657284] [2020-10-26 19:30:24,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:24,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:24,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:24,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:28,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:28,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-26 19:30:28,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:28,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3091 [2020-10-26 19:30:28,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:28,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:30:28,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:28,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:30:28,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:28,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:28,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:28,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:28,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:28,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:28,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:28,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:30:28,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:28,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:28,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:28,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:28,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:28,674 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:30:28,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886657284] [2020-10-26 19:30:28,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:28,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:30:28,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983361755] [2020-10-26 19:30:28,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:30:28,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:28,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:30:28,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:30:28,677 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 30 states. [2020-10-26 19:30:28,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:28,943 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2020-10-26 19:30:28,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:30:28,944 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 68 [2020-10-26 19:30:28,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:28,945 INFO L225 Difference]: With dead ends: 82 [2020-10-26 19:30:28,945 INFO L226 Difference]: Without dead ends: 72 [2020-10-26 19:30:28,946 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 [2020-10-26 19:30:28,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-26 19:30:28,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-10-26 19:30:28,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-26 19:30:28,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2020-10-26 19:30:28,952 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2020-10-26 19:30:28,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:28,952 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2020-10-26 19:30:28,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:30:28,952 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2020-10-26 19:30:28,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-26 19:30:28,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:28,953 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:28,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:30:28,953 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:28,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:28,954 INFO L82 PathProgramCache]: Analyzing trace with hash -738364912, now seen corresponding path program 27 times [2020-10-26 19:30:28,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:28,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854498288] [2020-10-26 19:30:28,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:28,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:28,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:28,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:32,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:32,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 19:30:32,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:32,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3747 [2020-10-26 19:30:32,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:32,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:30:32,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:32,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:30:32,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:33,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:33,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:33,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:33,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:33,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:33,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:33,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:30:33,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:33,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:33,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:33,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:33,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:33,393 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:30:33,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854498288] [2020-10-26 19:30:33,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:33,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:30:33,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331011980] [2020-10-26 19:30:33,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:30:33,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:33,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:30:33,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:30:33,395 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 31 states. [2020-10-26 19:30:33,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:33,668 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2020-10-26 19:30:33,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:30:33,668 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 70 [2020-10-26 19:30:33,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:33,670 INFO L225 Difference]: With dead ends: 84 [2020-10-26 19:30:33,670 INFO L226 Difference]: Without dead ends: 74 [2020-10-26 19:30:33,671 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 [2020-10-26 19:30:33,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-26 19:30:33,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-26 19:30:33,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-26 19:30:33,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-10-26 19:30:33,675 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2020-10-26 19:30:33,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:33,676 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-10-26 19:30:33,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:30:33,676 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-10-26 19:30:33,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-26 19:30:33,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:33,676 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:33,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:30:33,677 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:33,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:33,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1597978098, now seen corresponding path program 28 times [2020-10-26 19:30:33,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:33,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085071164] [2020-10-26 19:30:33,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:33,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:33,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:33,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:37,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:37,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-26 19:30:37,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:37,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3727 [2020-10-26 19:30:37,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:37,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:30:37,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:37,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:30:37,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:38,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:38,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:38,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:38,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:38,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:38,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:38,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:38,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:38,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:38,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:38,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:38,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:38,147 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:30:38,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1085071164] [2020-10-26 19:30:38,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:38,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:30:38,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946984962] [2020-10-26 19:30:38,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:30:38,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:38,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:30:38,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:30:38,154 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 32 states. [2020-10-26 19:30:38,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:38,355 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2020-10-26 19:30:38,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:30:38,355 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 72 [2020-10-26 19:30:38,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:38,356 INFO L225 Difference]: With dead ends: 86 [2020-10-26 19:30:38,356 INFO L226 Difference]: Without dead ends: 76 [2020-10-26 19:30:38,358 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 [2020-10-26 19:30:38,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-26 19:30:38,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-26 19:30:38,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-26 19:30:38,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-10-26 19:30:38,361 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2020-10-26 19:30:38,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:38,362 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-10-26 19:30:38,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:30:38,362 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-10-26 19:30:38,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-26 19:30:38,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:38,362 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:38,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:30:38,363 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:38,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:38,363 INFO L82 PathProgramCache]: Analyzing trace with hash 555714900, now seen corresponding path program 29 times [2020-10-26 19:30:38,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:38,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506649954] [2020-10-26 19:30:38,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:38,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:38,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:38,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:42,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:42,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-26 19:30:42,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:42,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4262 [2020-10-26 19:30:42,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:42,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:30:42,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:42,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:30:42,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:43,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:43,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:43,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:43,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:43,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:43,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:43,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:43,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:43,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:43,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:43,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:43,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:43,417 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:30:43,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506649954] [2020-10-26 19:30:43,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:43,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:30:43,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355928416] [2020-10-26 19:30:43,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:30:43,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:43,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:30:43,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:30:43,419 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 33 states. [2020-10-26 19:30:43,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:43,702 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2020-10-26 19:30:43,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:30:43,703 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 74 [2020-10-26 19:30:43,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:43,704 INFO L225 Difference]: With dead ends: 88 [2020-10-26 19:30:43,704 INFO L226 Difference]: Without dead ends: 78 [2020-10-26 19:30:43,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:30:43,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-26 19:30:43,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-26 19:30:43,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-26 19:30:43,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-10-26 19:30:43,712 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2020-10-26 19:30:43,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:43,712 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-10-26 19:30:43,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:30:43,712 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-10-26 19:30:43,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-26 19:30:43,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:43,713 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:43,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:30:43,714 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:43,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:43,714 INFO L82 PathProgramCache]: Analyzing trace with hash -331838410, now seen corresponding path program 30 times [2020-10-26 19:30:43,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:43,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911654866] [2020-10-26 19:30:43,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:43,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:43,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:43,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:48,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:48,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-26 19:30:48,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:48,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4597 [2020-10-26 19:30:48,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:48,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:30:48,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:48,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 19:30:48,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:49,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:49,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:49,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:49,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:49,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:49,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:49,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:30:49,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:49,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:49,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:49,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:49,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:49,138 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:30:49,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911654866] [2020-10-26 19:30:49,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:49,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:30:49,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122588473] [2020-10-26 19:30:49,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:30:49,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:49,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:30:49,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:30:49,141 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 34 states. [2020-10-26 19:30:49,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:49,443 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2020-10-26 19:30:49,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:30:49,444 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 76 [2020-10-26 19:30:49,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:49,445 INFO L225 Difference]: With dead ends: 90 [2020-10-26 19:30:49,445 INFO L226 Difference]: Without dead ends: 80 [2020-10-26 19:30:49,446 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 [2020-10-26 19:30:49,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-26 19:30:49,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-26 19:30:49,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-26 19:30:49,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-10-26 19:30:49,451 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2020-10-26 19:30:49,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:49,451 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-10-26 19:30:49,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:30:49,451 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-10-26 19:30:49,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-26 19:30:49,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:49,452 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:49,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:30:49,453 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:49,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:49,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1427922584, now seen corresponding path program 31 times [2020-10-26 19:30:49,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:49,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865516075] [2020-10-26 19:30:49,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:49,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:49,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:49,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:54,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:54,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-26 19:30:54,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:54,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4814 [2020-10-26 19:30:54,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:54,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:30:54,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:54,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-26 19:30:54,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:55,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:55,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:55,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:55,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:55,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:55,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:55,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:55,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:55,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:55,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:55,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:55,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:55,102 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:30:55,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865516075] [2020-10-26 19:30:55,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:55,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:30:55,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655312841] [2020-10-26 19:30:55,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:30:55,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:55,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:30:55,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:30:55,105 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 35 states. [2020-10-26 19:30:55,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:55,401 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2020-10-26 19:30:55,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:30:55,401 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 78 [2020-10-26 19:30:55,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:55,403 INFO L225 Difference]: With dead ends: 92 [2020-10-26 19:30:55,403 INFO L226 Difference]: Without dead ends: 82 [2020-10-26 19:30:55,404 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 [2020-10-26 19:30:55,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-26 19:30:55,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-26 19:30:55,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-26 19:30:55,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-10-26 19:30:55,411 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2020-10-26 19:30:55,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:55,411 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-10-26 19:30:55,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:30:55,411 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-10-26 19:30:55,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-26 19:30:55,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:55,418 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:55,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:30:55,418 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:55,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:55,419 INFO L82 PathProgramCache]: Analyzing trace with hash 341123194, now seen corresponding path program 32 times [2020-10-26 19:30:55,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:55,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838146968] [2020-10-26 19:30:55,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:55,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:55,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:55,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:00,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:00,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 19:31:00,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:31:00,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:31:00,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:00,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:31:00,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:00,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-26 19:31:00,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:01,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:01,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:01,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:01,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:01,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:01,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:01,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:01,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:01,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:01,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:01,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:01,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:01,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:31:01,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838146968] [2020-10-26 19:31:01,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:01,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-26 19:31:01,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634141739] [2020-10-26 19:31:01,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 19:31:01,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:01,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 19:31:01,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:31:01,360 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 36 states. [2020-10-26 19:31:01,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:01,619 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2020-10-26 19:31:01,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:31:01,620 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 80 [2020-10-26 19:31:01,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:01,621 INFO L225 Difference]: With dead ends: 94 [2020-10-26 19:31:01,621 INFO L226 Difference]: Without dead ends: 84 [2020-10-26 19:31:01,622 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 [2020-10-26 19:31:01,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-26 19:31:01,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-10-26 19:31:01,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-26 19:31:01,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2020-10-26 19:31:01,627 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2020-10-26 19:31:01,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:01,627 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2020-10-26 19:31:01,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 19:31:01,627 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2020-10-26 19:31:01,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-26 19:31:01,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:01,628 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:01,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:31:01,628 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:01,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:01,629 INFO L82 PathProgramCache]: Analyzing trace with hash -396037668, now seen corresponding path program 33 times [2020-10-26 19:31:01,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:01,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995318489] [2020-10-26 19:31:01,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:01,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:01,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:01,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:06,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:06,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-26 19:31:06,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:31:06,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-26 19:31:06,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:06,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:31:06,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:06,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-26 19:31:06,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:07,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:07,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:07,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:07,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:07,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:07,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:07,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:07,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:07,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:07,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:07,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:07,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:07,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:31:07,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995318489] [2020-10-26 19:31:07,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:07,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:31:07,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775407217] [2020-10-26 19:31:07,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:31:07,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:07,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:31:07,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:31:07,623 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 37 states. [2020-10-26 19:31:07,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:07,835 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2020-10-26 19:31:07,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:31:07,836 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 82 [2020-10-26 19:31:07,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:07,837 INFO L225 Difference]: With dead ends: 96 [2020-10-26 19:31:07,837 INFO L226 Difference]: Without dead ends: 86 [2020-10-26 19:31:07,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:31:07,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-26 19:31:07,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-26 19:31:07,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-26 19:31:07,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2020-10-26 19:31:07,846 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2020-10-26 19:31:07,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:07,846 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2020-10-26 19:31:07,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:31:07,846 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2020-10-26 19:31:07,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-26 19:31:07,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:07,847 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:07,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:31:07,848 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:07,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:07,850 INFO L82 PathProgramCache]: Analyzing trace with hash -138022210, now seen corresponding path program 34 times [2020-10-26 19:31:07,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:07,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482245333] [2020-10-26 19:31:07,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:07,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:07,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:07,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:12,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:12,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 19:31:12,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:31:12,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:31:12,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:12,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:31:12,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:12,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 19:31:12,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:13,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:13,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:13,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:13,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:13,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:13,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:13,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:13,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:13,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:13,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:13,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:13,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:13,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:31:13,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482245333] [2020-10-26 19:31:13,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:13,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-26 19:31:13,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392590347] [2020-10-26 19:31:13,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-26 19:31:13,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:13,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-26 19:31:13,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:31:13,878 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 38 states. [2020-10-26 19:31:14,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:14,078 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2020-10-26 19:31:14,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:31:14,079 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 84 [2020-10-26 19:31:14,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:14,080 INFO L225 Difference]: With dead ends: 98 [2020-10-26 19:31:14,080 INFO L226 Difference]: Without dead ends: 88 [2020-10-26 19:31:14,081 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 [2020-10-26 19:31:14,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-26 19:31:14,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-10-26 19:31:14,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-26 19:31:14,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-10-26 19:31:14,085 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2020-10-26 19:31:14,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:14,085 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-10-26 19:31:14,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-26 19:31:14,086 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-10-26 19:31:14,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-26 19:31:14,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:14,086 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:14,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:31:14,087 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:14,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:14,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1293270240, now seen corresponding path program 35 times [2020-10-26 19:31:14,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:14,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750299430] [2020-10-26 19:31:14,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:14,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:14,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:14,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:19,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:19,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 19:31:19,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:31:19,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:31:19,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:19,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:31:19,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:19,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-26 19:31:19,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:20,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:20,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:20,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:20,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:20,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:20,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:20,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:20,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:20,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:20,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:20,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:20,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:20,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:31:20,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750299430] [2020-10-26 19:31:20,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:20,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:31:20,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011071834] [2020-10-26 19:31:20,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:31:20,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:20,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:31:20,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:31:20,202 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 39 states. [2020-10-26 19:31:20,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:20,406 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2020-10-26 19:31:20,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:31:20,407 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 86 [2020-10-26 19:31:20,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:20,408 INFO L225 Difference]: With dead ends: 100 [2020-10-26 19:31:20,408 INFO L226 Difference]: Without dead ends: 90 [2020-10-26 19:31:20,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:31:20,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-26 19:31:20,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-26 19:31:20,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-26 19:31:20,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2020-10-26 19:31:20,414 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2020-10-26 19:31:20,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:20,415 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2020-10-26 19:31:20,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:31:20,415 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2020-10-26 19:31:20,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-26 19:31:20,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:20,416 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:20,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:31:20,416 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:20,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:20,417 INFO L82 PathProgramCache]: Analyzing trace with hash 909902594, now seen corresponding path program 36 times [2020-10-26 19:31:20,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:20,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644909552] [2020-10-26 19:31:20,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:20,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:20,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:20,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:25,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:25,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-26 19:31:25,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:31:25,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-26 19:31:25,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:25,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-26 19:31:25,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:25,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 19:31:25,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:26,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:26,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:26,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:26,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:26,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:26,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:26,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:26,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:26,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:26,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:26,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:26,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:26,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:31:26,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644909552] [2020-10-26 19:31:26,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:26,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-26 19:31:26,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030693917] [2020-10-26 19:31:26,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-26 19:31:26,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:26,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-26 19:31:26,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:31:26,552 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 40 states. [2020-10-26 19:31:26,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:26,809 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2020-10-26 19:31:26,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:31:26,810 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 88 [2020-10-26 19:31:26,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:26,811 INFO L225 Difference]: With dead ends: 102 [2020-10-26 19:31:26,812 INFO L226 Difference]: Without dead ends: 92 [2020-10-26 19:31:26,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:31:26,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-26 19:31:26,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-10-26 19:31:26,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-26 19:31:26,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2020-10-26 19:31:26,818 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2020-10-26 19:31:26,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:26,818 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2020-10-26 19:31:26,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-26 19:31:26,819 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2020-10-26 19:31:26,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-26 19:31:26,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:26,820 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:26,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-26 19:31:26,820 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:26,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:26,820 INFO L82 PathProgramCache]: Analyzing trace with hash 740119140, now seen corresponding path program 37 times [2020-10-26 19:31:26,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:26,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120471076] [2020-10-26 19:31:26,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:26,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:26,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:26,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:31,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:31,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-26 19:31:31,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:31:31,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4538 [2020-10-26 19:31:31,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:31,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-26 19:31:31,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:31,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 19:31:31,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:32,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:32,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:32,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:32,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:32,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:32,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:32,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:32,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:32,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:32,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:32,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:32,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:32,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:31:32,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120471076] [2020-10-26 19:31:32,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:32,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-26 19:31:32,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172057269] [2020-10-26 19:31:32,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-26 19:31:32,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:32,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-26 19:31:32,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:31:32,552 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 41 states. [2020-10-26 19:31:32,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:32,864 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2020-10-26 19:31:32,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-26 19:31:32,864 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 90 [2020-10-26 19:31:32,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:32,865 INFO L225 Difference]: With dead ends: 104 [2020-10-26 19:31:32,866 INFO L226 Difference]: Without dead ends: 94 [2020-10-26 19:31:32,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:31:32,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-26 19:31:32,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-26 19:31:32,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-26 19:31:32,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2020-10-26 19:31:32,872 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2020-10-26 19:31:32,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:32,872 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2020-10-26 19:31:32,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-26 19:31:32,872 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2020-10-26 19:31:32,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-26 19:31:32,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:32,874 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:32,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-26 19:31:32,874 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:32,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:32,874 INFO L82 PathProgramCache]: Analyzing trace with hash 786977094, now seen corresponding path program 38 times [2020-10-26 19:31:32,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:32,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151934434] [2020-10-26 19:31:32,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:32,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:32,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:33,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:37,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:37,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-26 19:31:37,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:31:37,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4938 [2020-10-26 19:31:37,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:37,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-26 19:31:37,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:37,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 19:31:37,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:39,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:39,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:39,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:39,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:39,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:39,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:39,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:39,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:39,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:39,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:39,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:39,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:39,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:31:39,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151934434] [2020-10-26 19:31:39,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:39,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-26 19:31:39,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311625272] [2020-10-26 19:31:39,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-26 19:31:39,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:39,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-26 19:31:39,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:31:39,064 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 42 states. [2020-10-26 19:31:39,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:39,434 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2020-10-26 19:31:39,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-26 19:31:39,435 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 92 [2020-10-26 19:31:39,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:39,436 INFO L225 Difference]: With dead ends: 106 [2020-10-26 19:31:39,436 INFO L226 Difference]: Without dead ends: 96 [2020-10-26 19:31:39,437 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 [2020-10-26 19:31:39,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-26 19:31:39,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-26 19:31:39,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-26 19:31:39,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2020-10-26 19:31:39,446 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2020-10-26 19:31:39,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:39,446 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2020-10-26 19:31:39,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-26 19:31:39,447 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2020-10-26 19:31:39,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-26 19:31:39,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:39,449 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:39,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-26 19:31:39,449 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:39,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:39,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1427169368, now seen corresponding path program 39 times [2020-10-26 19:31:39,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:39,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653854904] [2020-10-26 19:31:39,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:39,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:39,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:40,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:44,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:44,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-26 19:31:44,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:31:44,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:31:44,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:44,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-26 19:31:44,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:44,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 19:31:44,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:45,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:45,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:45,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:45,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:45,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:45,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:45,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:31:45,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:45,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:45,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:45,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:45,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:45,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:31:45,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653854904] [2020-10-26 19:31:45,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:45,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-26 19:31:45,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663529102] [2020-10-26 19:31:45,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-26 19:31:45,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:45,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-26 19:31:45,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:31:45,775 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 43 states. [2020-10-26 19:31:46,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:46,047 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2020-10-26 19:31:46,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-26 19:31:46,047 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 94 [2020-10-26 19:31:46,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:46,048 INFO L225 Difference]: With dead ends: 108 [2020-10-26 19:31:46,048 INFO L226 Difference]: Without dead ends: 98 [2020-10-26 19:31:46,049 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 [2020-10-26 19:31:46,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-26 19:31:46,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-26 19:31:46,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-26 19:31:46,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2020-10-26 19:31:46,053 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 94 [2020-10-26 19:31:46,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:46,053 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2020-10-26 19:31:46,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-26 19:31:46,054 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2020-10-26 19:31:46,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-26 19:31:46,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:46,055 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:46,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-26 19:31:46,055 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:46,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:46,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1081859466, now seen corresponding path program 40 times [2020-10-26 19:31:46,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:46,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909445262] [2020-10-26 19:31:46,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:46,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:46,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:46,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:51,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:51,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-26 19:31:51,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:31:51,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-26 19:31:51,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:51,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-26 19:31:51,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:51,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-26 19:31:51,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:52,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:52,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:52,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:52,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:52,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:52,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:52,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:31:52,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:52,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:52,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:52,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:52,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:52,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:31:52,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909445262] [2020-10-26 19:31:52,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:52,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-26 19:31:52,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756935797] [2020-10-26 19:31:52,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-26 19:31:52,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:52,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-26 19:31:52,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:31:52,431 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 44 states. [2020-10-26 19:31:52,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:52,811 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2020-10-26 19:31:52,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-26 19:31:52,812 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 96 [2020-10-26 19:31:52,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:52,813 INFO L225 Difference]: With dead ends: 110 [2020-10-26 19:31:52,813 INFO L226 Difference]: Without dead ends: 100 [2020-10-26 19:31:52,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:31:52,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-26 19:31:52,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-10-26 19:31:52,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-26 19:31:52,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2020-10-26 19:31:52,820 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2020-10-26 19:31:52,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:52,820 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2020-10-26 19:31:52,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-26 19:31:52,821 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2020-10-26 19:31:52,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-26 19:31:52,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:52,822 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:52,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-26 19:31:52,822 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:52,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:52,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1513051412, now seen corresponding path program 41 times [2020-10-26 19:31:52,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:52,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [133498453] [2020-10-26 19:31:52,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:52,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:52,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:53,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:57,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:57,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-26 19:31:57,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:31:57,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:31:57,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:57,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-26 19:31:57,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:57,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-26 19:31:57,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:59,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:59,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:59,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:59,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:59,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:59,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:59,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:31:59,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:59,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:59,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:59,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:59,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:59,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:31:59,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [133498453] [2020-10-26 19:31:59,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:59,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-26 19:31:59,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484992687] [2020-10-26 19:31:59,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-26 19:31:59,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:59,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-26 19:31:59,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:31:59,278 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 45 states. [2020-10-26 19:31:59,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:59,646 INFO L93 Difference]: Finished difference Result 112 states and 114 transitions. [2020-10-26 19:31:59,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-26 19:31:59,647 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 98 [2020-10-26 19:31:59,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:59,649 INFO L225 Difference]: With dead ends: 112 [2020-10-26 19:31:59,649 INFO L226 Difference]: Without dead ends: 102 [2020-10-26 19:31:59,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:31:59,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-26 19:31:59,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-10-26 19:31:59,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-26 19:31:59,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2020-10-26 19:31:59,656 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2020-10-26 19:31:59,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:59,656 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2020-10-26 19:31:59,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-26 19:31:59,656 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2020-10-26 19:31:59,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-26 19:31:59,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:59,657 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:59,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-26 19:31:59,657 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:59,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:59,658 INFO L82 PathProgramCache]: Analyzing trace with hash 153593806, now seen corresponding path program 42 times [2020-10-26 19:31:59,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:59,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239211945] [2020-10-26 19:31:59,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:59,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:59,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:59,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:04,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:04,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-26 19:32:04,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:32:04,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:32:04,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:04,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-26 19:32:04,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:04,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-26 19:32:04,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:06,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:06,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:06,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:06,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:06,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:06,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:06,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:06,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:06,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:06,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:06,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:06,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:06,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:32:06,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239211945] [2020-10-26 19:32:06,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:06,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-26 19:32:06,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8615119] [2020-10-26 19:32:06,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-26 19:32:06,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:06,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-26 19:32:06,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-26 19:32:06,167 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 46 states. [2020-10-26 19:32:06,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:06,466 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2020-10-26 19:32:06,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-26 19:32:06,467 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 100 [2020-10-26 19:32:06,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:06,469 INFO L225 Difference]: With dead ends: 114 [2020-10-26 19:32:06,469 INFO L226 Difference]: Without dead ends: 104 [2020-10-26 19:32:06,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-26 19:32:06,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-26 19:32:06,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-10-26 19:32:06,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-26 19:32:06,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2020-10-26 19:32:06,475 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 100 [2020-10-26 19:32:06,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:06,475 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2020-10-26 19:32:06,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-26 19:32:06,475 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2020-10-26 19:32:06,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-26 19:32:06,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:06,476 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:06,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-26 19:32:06,476 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:06,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:06,477 INFO L82 PathProgramCache]: Analyzing trace with hash -223153104, now seen corresponding path program 43 times [2020-10-26 19:32:06,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:06,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358633229] [2020-10-26 19:32:06,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:06,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:06,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:06,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:11,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:11,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 19:32:11,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:32:11,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:32:11,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:11,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-26 19:32:11,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:11,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-26 19:32:11,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:13,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:13,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:13,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:13,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:13,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:13,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:13,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:13,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:13,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:13,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:13,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:13,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:13,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:32:13,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358633229] [2020-10-26 19:32:13,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:13,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-26 19:32:13,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372667039] [2020-10-26 19:32:13,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-26 19:32:13,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:13,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-26 19:32:13,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 19:32:13,054 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 47 states. [2020-10-26 19:32:13,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:13,335 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2020-10-26 19:32:13,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-26 19:32:13,336 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 102 [2020-10-26 19:32:13,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:13,337 INFO L225 Difference]: With dead ends: 116 [2020-10-26 19:32:13,337 INFO L226 Difference]: Without dead ends: 106 [2020-10-26 19:32:13,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 19:32:13,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-26 19:32:13,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-10-26 19:32:13,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-26 19:32:13,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2020-10-26 19:32:13,342 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2020-10-26 19:32:13,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:13,343 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2020-10-26 19:32:13,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-26 19:32:13,343 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2020-10-26 19:32:13,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-26 19:32:13,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:13,344 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:13,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-26 19:32:13,344 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:13,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:13,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1499680750, now seen corresponding path program 44 times [2020-10-26 19:32:13,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:13,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1756543987] [2020-10-26 19:32:13,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:13,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:13,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:13,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:18,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:18,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-26 19:32:18,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:32:18,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:32:18,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:18,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-26 19:32:18,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:18,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 19:32:18,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:19,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:19,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:19,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:19,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:19,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:19,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:19,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:32:19,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:19,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:19,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:19,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:19,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:19,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:32:19,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1756543987] [2020-10-26 19:32:19,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:19,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-26 19:32:19,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539652103] [2020-10-26 19:32:19,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-26 19:32:19,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:19,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-26 19:32:19,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-26 19:32:19,966 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 48 states. [2020-10-26 19:32:20,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:20,244 INFO L93 Difference]: Finished difference Result 118 states and 120 transitions. [2020-10-26 19:32:20,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-26 19:32:20,245 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 104 [2020-10-26 19:32:20,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:20,246 INFO L225 Difference]: With dead ends: 118 [2020-10-26 19:32:20,246 INFO L226 Difference]: Without dead ends: 108 [2020-10-26 19:32:20,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-26 19:32:20,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-26 19:32:20,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-10-26 19:32:20,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-26 19:32:20,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2020-10-26 19:32:20,251 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2020-10-26 19:32:20,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:20,252 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2020-10-26 19:32:20,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-26 19:32:20,252 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2020-10-26 19:32:20,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-26 19:32:20,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:20,253 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:20,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-26 19:32:20,253 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:20,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:20,254 INFO L82 PathProgramCache]: Analyzing trace with hash 117898100, now seen corresponding path program 45 times [2020-10-26 19:32:20,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:20,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46784846] [2020-10-26 19:32:20,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:20,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:20,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:20,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:25,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:25,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-26 19:32:25,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:32:25,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:32:25,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:25,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-26 19:32:25,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:25,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-26 19:32:25,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:26,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:26,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:26,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:26,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:26,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:26,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:26,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:26,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:26,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:26,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:26,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:26,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:26,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:32:26,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46784846] [2020-10-26 19:32:26,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:26,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-26 19:32:26,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177625115] [2020-10-26 19:32:26,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-26 19:32:26,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:26,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-26 19:32:26,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-26 19:32:26,961 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 49 states. [2020-10-26 19:32:27,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:27,292 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2020-10-26 19:32:27,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-26 19:32:27,292 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 106 [2020-10-26 19:32:27,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:27,294 INFO L225 Difference]: With dead ends: 120 [2020-10-26 19:32:27,294 INFO L226 Difference]: Without dead ends: 110 [2020-10-26 19:32:27,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-26 19:32:27,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-26 19:32:27,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-10-26 19:32:27,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-26 19:32:27,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2020-10-26 19:32:27,299 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2020-10-26 19:32:27,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:27,299 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2020-10-26 19:32:27,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-26 19:32:27,299 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2020-10-26 19:32:27,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-26 19:32:27,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:27,300 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:27,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-26 19:32:27,300 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:27,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:27,301 INFO L82 PathProgramCache]: Analyzing trace with hash -166988202, now seen corresponding path program 46 times [2020-10-26 19:32:27,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:27,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568586917] [2020-10-26 19:32:27,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:27,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:27,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:27,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:32,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:32,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-26 19:32:32,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:32:32,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-26 19:32:32,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:32,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-26 19:32:32,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:32,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 19:32:32,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:34,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:34,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:34,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:34,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:34,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:34,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:34,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:32:34,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:34,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:34,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:34,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:34,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:34,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:32:34,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568586917] [2020-10-26 19:32:34,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:34,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-26 19:32:34,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149153484] [2020-10-26 19:32:34,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-26 19:32:34,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:34,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-26 19:32:34,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-26 19:32:34,124 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 50 states. [2020-10-26 19:32:34,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:34,531 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2020-10-26 19:32:34,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-26 19:32:34,531 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 108 [2020-10-26 19:32:34,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:34,533 INFO L225 Difference]: With dead ends: 122 [2020-10-26 19:32:34,533 INFO L226 Difference]: Without dead ends: 112 [2020-10-26 19:32:34,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-26 19:32:34,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-26 19:32:34,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-10-26 19:32:34,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-26 19:32:34,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2020-10-26 19:32:34,540 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 108 [2020-10-26 19:32:34,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:34,540 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2020-10-26 19:32:34,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-26 19:32:34,540 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2020-10-26 19:32:34,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-26 19:32:34,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:34,541 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:34,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-26 19:32:34,541 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:34,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:34,542 INFO L82 PathProgramCache]: Analyzing trace with hash 935182520, now seen corresponding path program 47 times [2020-10-26 19:32:34,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:34,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142417535] [2020-10-26 19:32:34,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:34,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:34,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:34,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:39,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:39,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-26 19:32:39,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:32:39,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-26 19:32:39,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:39,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-26 19:32:39,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:39,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-26 19:32:39,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:41,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:41,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:41,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:41,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:41,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:41,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:41,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:41,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:41,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:41,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:41,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:41,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:41,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:32:41,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142417535] [2020-10-26 19:32:41,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:41,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-26 19:32:41,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370685342] [2020-10-26 19:32:41,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-26 19:32:41,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:41,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-26 19:32:41,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-26 19:32:41,397 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 51 states. [2020-10-26 19:32:41,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:41,821 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2020-10-26 19:32:41,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-26 19:32:41,821 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 110 [2020-10-26 19:32:41,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:41,823 INFO L225 Difference]: With dead ends: 124 [2020-10-26 19:32:41,823 INFO L226 Difference]: Without dead ends: 114 [2020-10-26 19:32:41,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-26 19:32:41,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-26 19:32:41,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-10-26 19:32:41,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-26 19:32:41,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2020-10-26 19:32:41,829 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 110 [2020-10-26 19:32:41,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:41,829 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2020-10-26 19:32:41,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-26 19:32:41,829 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2020-10-26 19:32:41,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-26 19:32:41,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:41,830 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:41,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-26 19:32:41,830 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:41,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:41,831 INFO L82 PathProgramCache]: Analyzing trace with hash -735675750, now seen corresponding path program 48 times [2020-10-26 19:32:41,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:41,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682800886] [2020-10-26 19:32:41,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:41,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:41,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:42,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:46,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:46,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-26 19:32:46,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:32:46,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-26 19:32:46,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:46,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-26 19:32:46,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:46,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-26 19:32:46,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:48,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:48,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:48,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:48,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:48,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:48,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:48,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:48,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:48,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:48,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:48,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:48,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:48,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:32:48,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682800886] [2020-10-26 19:32:48,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:48,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-26 19:32:48,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240498979] [2020-10-26 19:32:48,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-26 19:32:48,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:48,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-26 19:32:48,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-26 19:32:48,787 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 52 states. [2020-10-26 19:32:49,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:49,114 INFO L93 Difference]: Finished difference Result 126 states and 128 transitions. [2020-10-26 19:32:49,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-26 19:32:49,114 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 112 [2020-10-26 19:32:49,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:49,116 INFO L225 Difference]: With dead ends: 126 [2020-10-26 19:32:49,116 INFO L226 Difference]: Without dead ends: 116 [2020-10-26 19:32:49,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-26 19:32:49,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-26 19:32:49,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-10-26 19:32:49,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-26 19:32:49,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2020-10-26 19:32:49,120 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 112 [2020-10-26 19:32:49,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:49,121 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2020-10-26 19:32:49,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-26 19:32:49,121 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2020-10-26 19:32:49,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-26 19:32:49,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:49,122 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:49,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-26 19:32:49,122 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:49,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:49,122 INFO L82 PathProgramCache]: Analyzing trace with hash -112704516, now seen corresponding path program 49 times [2020-10-26 19:32:49,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:49,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938896285] [2020-10-26 19:32:49,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:49,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:49,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:49,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:54,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:54,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-26 19:32:54,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:32:54,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-26 19:32:54,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:54,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-26 19:32:54,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:54,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-26 19:32:54,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:56,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:56,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:56,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:56,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:56,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:56,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:56,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:56,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:56,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:56,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:56,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:56,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:56,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:32:56,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938896285] [2020-10-26 19:32:56,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:56,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-26 19:32:56,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311795639] [2020-10-26 19:32:56,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-26 19:32:56,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:56,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-26 19:32:56,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-26 19:32:56,131 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 53 states. [2020-10-26 19:32:56,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:56,581 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2020-10-26 19:32:56,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-26 19:32:56,582 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 114 [2020-10-26 19:32:56,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:56,584 INFO L225 Difference]: With dead ends: 128 [2020-10-26 19:32:56,584 INFO L226 Difference]: Without dead ends: 118 [2020-10-26 19:32:56,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-26 19:32:56,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-26 19:32:56,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-10-26 19:32:56,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-26 19:32:56,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2020-10-26 19:32:56,588 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2020-10-26 19:32:56,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:56,588 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2020-10-26 19:32:56,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-26 19:32:56,589 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2020-10-26 19:32:56,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-26 19:32:56,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:56,589 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:56,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-26 19:32:56,590 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:56,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:56,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1562197214, now seen corresponding path program 50 times [2020-10-26 19:32:56,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:56,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555905366] [2020-10-26 19:32:56,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:56,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:56,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:56,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:01,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:01,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-26 19:33:01,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:33:01,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-26 19:33:01,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:01,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-26 19:33:01,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:01,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-26 19:33:01,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:03,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:03,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:03,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:03,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:03,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:03,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:03,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:33:03,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:03,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:03,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:03,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:03,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:03,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:33:03,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555905366] [2020-10-26 19:33:03,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:03,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-26 19:33:03,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563730527] [2020-10-26 19:33:03,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-26 19:33:03,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:03,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-26 19:33:03,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-26 19:33:03,691 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 54 states. [2020-10-26 19:33:04,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:04,134 INFO L93 Difference]: Finished difference Result 130 states and 132 transitions. [2020-10-26 19:33:04,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-26 19:33:04,135 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 116 [2020-10-26 19:33:04,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:04,137 INFO L225 Difference]: With dead ends: 130 [2020-10-26 19:33:04,137 INFO L226 Difference]: Without dead ends: 120 [2020-10-26 19:33:04,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-26 19:33:04,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-26 19:33:04,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-10-26 19:33:04,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-26 19:33:04,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2020-10-26 19:33:04,142 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 116 [2020-10-26 19:33:04,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:04,143 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2020-10-26 19:33:04,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-26 19:33:04,143 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2020-10-26 19:33:04,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-26 19:33:04,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:04,144 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:04,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-26 19:33:04,144 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:04,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:04,144 INFO L82 PathProgramCache]: Analyzing trace with hash 530023744, now seen corresponding path program 51 times [2020-10-26 19:33:04,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:04,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827510549] [2020-10-26 19:33:04,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:04,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:04,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:04,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:09,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:09,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-26 19:33:09,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:33:09,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-26 19:33:09,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:09,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-26 19:33:09,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:09,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-26 19:33:09,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:11,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:11,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:11,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:11,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:11,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:11,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:11,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:33:11,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:11,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:11,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:11,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:11,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:11,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:33:11,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827510549] [2020-10-26 19:33:11,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:11,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-26 19:33:11,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869605427] [2020-10-26 19:33:11,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-26 19:33:11,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:11,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-26 19:33:11,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-26 19:33:11,318 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 55 states. [2020-10-26 19:33:11,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:11,672 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2020-10-26 19:33:11,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-26 19:33:11,673 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 118 [2020-10-26 19:33:11,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:11,675 INFO L225 Difference]: With dead ends: 132 [2020-10-26 19:33:11,675 INFO L226 Difference]: Without dead ends: 122 [2020-10-26 19:33:11,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-26 19:33:11,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-26 19:33:11,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-10-26 19:33:11,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-26 19:33:11,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2020-10-26 19:33:11,681 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 118 [2020-10-26 19:33:11,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:11,681 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2020-10-26 19:33:11,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-26 19:33:11,682 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2020-10-26 19:33:11,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-26 19:33:11,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:11,682 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:11,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-26 19:33:11,683 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:11,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:11,683 INFO L82 PathProgramCache]: Analyzing trace with hash 748764450, now seen corresponding path program 52 times [2020-10-26 19:33:11,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:11,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475123679] [2020-10-26 19:33:11,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:11,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:11,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:11,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:16,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:16,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-26 19:33:16,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:33:16,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-26 19:33:16,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:16,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-26 19:33:16,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:16,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 19:33:16,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:18,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:18,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:18,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:18,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:18,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:18,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:18,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:33:18,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:18,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:18,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:18,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:18,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:18,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:33:18,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475123679] [2020-10-26 19:33:18,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:18,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-26 19:33:18,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623426035] [2020-10-26 19:33:18,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-26 19:33:18,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:18,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-26 19:33:18,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-26 19:33:18,896 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 56 states. [2020-10-26 19:33:19,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:19,345 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2020-10-26 19:33:19,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-26 19:33:19,346 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 120 [2020-10-26 19:33:19,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:19,347 INFO L225 Difference]: With dead ends: 134 [2020-10-26 19:33:19,347 INFO L226 Difference]: Without dead ends: 124 [2020-10-26 19:33:19,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-26 19:33:19,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-26 19:33:19,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2020-10-26 19:33:19,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-26 19:33:19,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2020-10-26 19:33:19,353 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 120 [2020-10-26 19:33:19,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:19,353 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2020-10-26 19:33:19,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-26 19:33:19,353 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2020-10-26 19:33:19,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-26 19:33:19,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:19,354 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:19,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-26 19:33:19,354 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:19,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:19,355 INFO L82 PathProgramCache]: Analyzing trace with hash 505185412, now seen corresponding path program 53 times [2020-10-26 19:33:19,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:19,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891915285] [2020-10-26 19:33:19,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:19,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:19,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:19,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:24,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:24,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 19:33:24,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:33:24,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-26 19:33:24,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:24,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-26 19:33:24,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:24,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-26 19:33:24,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:26,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:26,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:26,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:26,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:26,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:26,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:26,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:33:26,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:26,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:26,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:26,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:26,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:26,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:33:26,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891915285] [2020-10-26 19:33:26,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:26,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-26 19:33:26,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518606733] [2020-10-26 19:33:26,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-26 19:33:26,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:26,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-26 19:33:26,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-26 19:33:26,770 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 57 states. [2020-10-26 19:33:27,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:27,164 INFO L93 Difference]: Finished difference Result 136 states and 138 transitions. [2020-10-26 19:33:27,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-26 19:33:27,165 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 122 [2020-10-26 19:33:27,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:27,166 INFO L225 Difference]: With dead ends: 136 [2020-10-26 19:33:27,166 INFO L226 Difference]: Without dead ends: 126 [2020-10-26 19:33:27,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-26 19:33:27,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-26 19:33:27,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2020-10-26 19:33:27,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-26 19:33:27,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2020-10-26 19:33:27,172 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 122 [2020-10-26 19:33:27,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:27,173 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2020-10-26 19:33:27,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-26 19:33:27,173 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2020-10-26 19:33:27,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-26 19:33:27,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:27,174 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:27,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-26 19:33:27,174 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:27,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:27,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1646036122, now seen corresponding path program 54 times [2020-10-26 19:33:27,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:27,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130367258] [2020-10-26 19:33:27,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:27,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:27,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:27,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking...