/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_password_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:29:24,176 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:29:24,183 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:29:24,236 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:29:24,237 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:29:24,243 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:29:24,245 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:29:24,250 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:29:24,253 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:29:24,261 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:29:24,263 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:29:24,264 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:29:24,265 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:29:24,268 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:29:24,272 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:29:24,275 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:29:24,276 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:29:24,280 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:29:24,288 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:29:24,292 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:29:24,295 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:29:24,296 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:29:24,298 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:29:24,298 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:29:24,310 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:29:24,311 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:29:24,312 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:29:24,313 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:29:24,315 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:29:24,316 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:29:24,316 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:29:24,317 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:29:24,319 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:29:24,320 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:29:24,321 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:29:24,321 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:29:24,322 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:29:24,322 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:29:24,323 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:29:24,324 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:29:24,324 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:29:24,332 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 19:29:24,388 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:29:24,388 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:29:24,392 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:29:24,392 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:29:24,392 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:29:24,393 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:29:24,393 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:29:24,393 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:29:24,393 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:29:24,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:29:24,394 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:29:24,395 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:29:24,395 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:29:24,395 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:29:24,395 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:29:24,395 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:29:24,396 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:29:24,396 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:29:24,396 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:29:24,396 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:29:24,396 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:29:24,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:29:24,397 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:29:24,397 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:29:24,397 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:29:24,398 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:29:24,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:29:24,398 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:29:24,398 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:29:24,398 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:29:24,840 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:29:24,870 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:29:24,874 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:29:24,875 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:29:24,876 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:29:24,877 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_password_ground.i [2020-10-26 19:29:24,955 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/274b9cf30/58c004714ade473b838f6c2573190eed/FLAG4c7457097 [2020-10-26 19:29:25,585 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:29:25,586 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_password_ground.i [2020-10-26 19:29:25,594 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/274b9cf30/58c004714ade473b838f6c2573190eed/FLAG4c7457097 [2020-10-26 19:29:25,925 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/274b9cf30/58c004714ade473b838f6c2573190eed [2020-10-26 19:29:25,928 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:29:25,939 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:29:25,943 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:29:25,944 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:29:25,948 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:29:25,949 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:29:25" (1/1) ... [2020-10-26 19:29:25,954 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55f9954f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:25, skipping insertion in model container [2020-10-26 19:29:25,955 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:29:25" (1/1) ... [2020-10-26 19:29:25,964 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:29:25,982 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:29:26,165 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:29:26,181 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:29:26,225 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:29:26,250 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:29:26,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:26 WrapperNode [2020-10-26 19:29:26,252 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:29:26,254 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:29:26,254 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:29:26,254 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:29:26,270 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:26" (1/1) ... [2020-10-26 19:29:26,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:26" (1/1) ... [2020-10-26 19:29:26,285 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:26" (1/1) ... [2020-10-26 19:29:26,286 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:26" (1/1) ... [2020-10-26 19:29:26,310 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:26" (1/1) ... [2020-10-26 19:29:26,320 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:26" (1/1) ... [2020-10-26 19:29:26,328 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:26" (1/1) ... [2020-10-26 19:29:26,334 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:29:26,337 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:29:26,337 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:29:26,337 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:29:26,339 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:26" (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 19:29:26,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:29:26,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:29:26,450 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:29:26,450 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:29:26,451 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:29:26,451 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:29:26,452 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:29:26,452 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:29:26,452 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:29:26,453 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:29:26,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:29:26,455 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:29:26,455 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:29:26,455 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:29:26,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:29:26,457 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:29:26,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:29:26,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:29:26,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:29:26,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:29:27,078 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:29:27,078 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-26 19:29:27,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:29:27 BoogieIcfgContainer [2020-10-26 19:29:27,081 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:29:27,083 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:29:27,083 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:29:27,087 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:29:27,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:29:25" (1/3) ... [2020-10-26 19:29:27,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e573edb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:29:27, skipping insertion in model container [2020-10-26 19:29:27,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:26" (2/3) ... [2020-10-26 19:29:27,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e573edb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:29:27, skipping insertion in model container [2020-10-26 19:29:27,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:29:27" (3/3) ... [2020-10-26 19:29:27,092 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_password_ground.i [2020-10-26 19:29:27,106 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:29:27,112 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:29:27,139 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:29:27,169 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:29:27,169 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:29:27,169 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:29:27,170 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:29:27,170 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:29:27,170 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:29:27,170 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:29:27,171 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:29:27,192 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-26 19:29:27,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-26 19:29:27,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:27,200 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:27,201 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:27,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:27,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1803555133, now seen corresponding path program 1 times [2020-10-26 19:29:27,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:27,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116599636] [2020-10-26 19:29:27,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:27,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:27,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:27,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:27,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:27,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 19:29:27,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:29:27,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 212 [2020-10-26 19:29:27,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:27,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:27,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:29:27,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:27,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:29:27,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:27,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:27,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:27,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:27,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:27,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:27,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 19:29:27,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:27,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:27,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:27,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:27,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:27,705 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 19:29:27,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116599636] [2020-10-26 19:29:27,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:29:27,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 19:29:27,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123853325] [2020-10-26 19:29:27,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 19:29:27,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:27,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 19:29:27,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:29:27,733 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-10-26 19:29:27,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:27,836 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2020-10-26 19:29:27,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 19:29:27,839 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-26 19:29:27,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:27,847 INFO L225 Difference]: With dead ends: 55 [2020-10-26 19:29:27,847 INFO L226 Difference]: Without dead ends: 25 [2020-10-26 19:29:27,851 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 19:29:27,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-26 19:29:27,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-26 19:29:27,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-26 19:29:27,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-26 19:29:27,895 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2020-10-26 19:29:27,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:27,896 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-26 19:29:27,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 19:29:27,896 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-26 19:29:27,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-26 19:29:27,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:27,897 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:27,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:29:27,898 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:27,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:27,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1892475988, now seen corresponding path program 1 times [2020-10-26 19:29:27,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:27,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598514607] [2020-10-26 19:29:27,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:27,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:27,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:27,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:28,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:28,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 19:29:28,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:29:28,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 270 [2020-10-26 19:29:28,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:28,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:29:28,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:28,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:29:28,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:28,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:28,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:28,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:28,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:28,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:28,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:28,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 19:29:28,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:28,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:28,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:28,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:28,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:29:28,265 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 19:29:28,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598514607] [2020-10-26 19:29:28,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:29:28,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:29:28,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387405820] [2020-10-26 19:29:28,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:29:28,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:28,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:29:28,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:29:28,271 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 4 states. [2020-10-26 19:29:28,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:28,413 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2020-10-26 19:29:28,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:29:28,414 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-26 19:29:28,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:28,415 INFO L225 Difference]: With dead ends: 47 [2020-10-26 19:29:28,416 INFO L226 Difference]: Without dead ends: 30 [2020-10-26 19:29:28,417 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 19:29:28,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-26 19:29:28,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-10-26 19:29:28,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-26 19:29:28,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-26 19:29:28,427 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2020-10-26 19:29:28,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:28,427 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-26 19:29:28,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:29:28,427 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-26 19:29:28,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-26 19:29:28,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:28,429 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:28,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:29:28,429 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:28,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:28,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1553858971, now seen corresponding path program 1 times [2020-10-26 19:29:28,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:28,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206218505] [2020-10-26 19:29:28,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:28,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:28,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:28,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:28,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:29,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:29,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 19:29:29,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:29:29,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 646 [2020-10-26 19:29:29,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:29,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:29:29,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:29,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:29:29,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:29,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:29,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:29,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:29,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:29,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:29,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:29,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:29:29,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:29,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:29,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:29,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:29,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:29,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:29:29,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206218505] [2020-10-26 19:29:29,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:29,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:29:29,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451731377] [2020-10-26 19:29:29,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:29:29,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:29,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:29:29,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:29:29,166 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 5 states. [2020-10-26 19:29:29,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:29,279 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2020-10-26 19:29:29,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:29:29,280 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-26 19:29:29,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:29,281 INFO L225 Difference]: With dead ends: 53 [2020-10-26 19:29:29,281 INFO L226 Difference]: Without dead ends: 35 [2020-10-26 19:29:29,282 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 19:29:29,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-26 19:29:29,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-10-26 19:29:29,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-26 19:29:29,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-26 19:29:29,290 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 22 [2020-10-26 19:29:29,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:29,291 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-26 19:29:29,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:29:29,291 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-26 19:29:29,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 19:29:29,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:29,292 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:29,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:29:29,293 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:29,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:29,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1736894584, now seen corresponding path program 2 times [2020-10-26 19:29:29,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:29,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042796553] [2020-10-26 19:29:29,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:29,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:29,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:29,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:29,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:30,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:30,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-26 19:29:30,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:29:30,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 826 [2020-10-26 19:29:30,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:30,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:29:30,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:30,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:29:30,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:30,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:30,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:30,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:30,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:30,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:30,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:30,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:29:30,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:30,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:30,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:30,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:30,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:30,217 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 19:29:30,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042796553] [2020-10-26 19:29:30,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:30,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:29:30,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154022446] [2020-10-26 19:29:30,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:29:30,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:30,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:29:30,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:29:30,221 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 6 states. [2020-10-26 19:29:30,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:30,330 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2020-10-26 19:29:30,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:29:30,331 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-26 19:29:30,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:30,332 INFO L225 Difference]: With dead ends: 61 [2020-10-26 19:29:30,332 INFO L226 Difference]: Without dead ends: 40 [2020-10-26 19:29:30,333 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 19:29:30,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-26 19:29:30,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-10-26 19:29:30,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-26 19:29:30,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-10-26 19:29:30,341 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 27 [2020-10-26 19:29:30,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:30,341 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-10-26 19:29:30,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:29:30,341 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-10-26 19:29:30,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-26 19:29:30,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:30,343 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:30,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:29:30,343 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:30,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:30,344 INFO L82 PathProgramCache]: Analyzing trace with hash -201829751, now seen corresponding path program 3 times [2020-10-26 19:29:30,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:30,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497198506] [2020-10-26 19:29:30,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:30,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:30,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:30,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:30,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:31,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:31,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 19:29:31,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:29:31,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1627 [2020-10-26 19:29:31,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:31,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:29:31,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:31,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:29:31,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:32,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:32,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:32,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:32,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:32,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:32,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:32,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:29:32,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:32,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:32,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:32,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:32,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:32,091 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-26 19:29:32,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497198506] [2020-10-26 19:29:32,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:32,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:29:32,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811051996] [2020-10-26 19:29:32,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:29:32,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:32,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:29:32,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:29:32,094 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 7 states. [2020-10-26 19:29:32,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:32,225 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2020-10-26 19:29:32,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:29:32,226 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-10-26 19:29:32,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:32,227 INFO L225 Difference]: With dead ends: 69 [2020-10-26 19:29:32,227 INFO L226 Difference]: Without dead ends: 45 [2020-10-26 19:29:32,228 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 19:29:32,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-26 19:29:32,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-10-26 19:29:32,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-26 19:29:32,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-10-26 19:29:32,235 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 32 [2020-10-26 19:29:32,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:32,236 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-10-26 19:29:32,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:29:32,236 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-10-26 19:29:32,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-26 19:29:32,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:32,237 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:32,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:29:32,238 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:32,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:32,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1478812516, now seen corresponding path program 4 times [2020-10-26 19:29:32,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:32,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113832449] [2020-10-26 19:29:32,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:32,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:32,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:32,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:32,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:35,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:35,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-26 19:29:35,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:29:35,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2999 [2020-10-26 19:29:35,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:35,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:29:35,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:35,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:29:35,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:35,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:35,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:35,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:35,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:35,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:35,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:35,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:29:35,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:35,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:35,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:35,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:35,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:29:35,371 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-26 19:29:35,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113832449] [2020-10-26 19:29:35,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:35,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:29:35,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639553268] [2020-10-26 19:29:35,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:29:35,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:35,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:29:35,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:29:35,374 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 8 states. [2020-10-26 19:29:35,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:35,548 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions. [2020-10-26 19:29:35,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:29:35,549 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-10-26 19:29:35,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:35,550 INFO L225 Difference]: With dead ends: 77 [2020-10-26 19:29:35,550 INFO L226 Difference]: Without dead ends: 50 [2020-10-26 19:29:35,551 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 19:29:35,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-26 19:29:35,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-10-26 19:29:35,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-26 19:29:35,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-10-26 19:29:35,558 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 37 [2020-10-26 19:29:35,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:35,559 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-10-26 19:29:35,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:29:35,559 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-10-26 19:29:35,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-26 19:29:35,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:35,561 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:35,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:29:35,561 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:35,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:35,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1994127021, now seen corresponding path program 5 times [2020-10-26 19:29:35,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:35,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764199643] [2020-10-26 19:29:35,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:35,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:35,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:35,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:35,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:40,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:40,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:29:40,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:29:40,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4998 [2020-10-26 19:29:40,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:40,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:29:40,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:40,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:29:40,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:40,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:40,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:40,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:40,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:40,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:40,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:40,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 19:29:40,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:40,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:40,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:40,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:40,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:40,737 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-26 19:29:40,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764199643] [2020-10-26 19:29:40,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:40,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:29:40,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707437298] [2020-10-26 19:29:40,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:29:40,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:40,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:29:40,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:29:40,742 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 9 states. [2020-10-26 19:29:40,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:40,945 INFO L93 Difference]: Finished difference Result 85 states and 102 transitions. [2020-10-26 19:29:40,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:29:40,945 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-10-26 19:29:40,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:40,947 INFO L225 Difference]: With dead ends: 85 [2020-10-26 19:29:40,947 INFO L226 Difference]: Without dead ends: 55 [2020-10-26 19:29:40,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:29:40,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-26 19:29:40,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-10-26 19:29:40,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-26 19:29:40,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2020-10-26 19:29:40,966 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 42 [2020-10-26 19:29:40,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:40,967 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2020-10-26 19:29:40,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:29:40,969 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2020-10-26 19:29:40,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-26 19:29:40,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:40,972 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:40,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:29:40,973 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:40,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:40,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1756380992, now seen corresponding path program 6 times [2020-10-26 19:29:40,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:40,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410150901] [2020-10-26 19:29:40,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:40,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:41,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:41,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:41,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:46,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:46,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:29:46,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:29:46,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-26 19:29:46,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:46,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:29:46,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:46,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:29:46,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:46,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:46,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:46,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:46,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:46,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:46,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:46,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:29:46,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:46,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:46,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:46,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:46,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:46,141 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-26 19:29:46,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410150901] [2020-10-26 19:29:46,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:46,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:29:46,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164910537] [2020-10-26 19:29:46,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:29:46,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:46,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:29:46,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:29:46,152 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 10 states. [2020-10-26 19:29:46,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:46,341 INFO L93 Difference]: Finished difference Result 93 states and 112 transitions. [2020-10-26 19:29:46,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:29:46,342 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 47 [2020-10-26 19:29:46,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:46,343 INFO L225 Difference]: With dead ends: 93 [2020-10-26 19:29:46,343 INFO L226 Difference]: Without dead ends: 60 [2020-10-26 19:29:46,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:29:46,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-26 19:29:46,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2020-10-26 19:29:46,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-26 19:29:46,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2020-10-26 19:29:46,352 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 47 [2020-10-26 19:29:46,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:46,353 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2020-10-26 19:29:46,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:29:46,353 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2020-10-26 19:29:46,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-26 19:29:46,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:46,354 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:46,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:29:46,354 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:46,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:46,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1850944209, now seen corresponding path program 7 times [2020-10-26 19:29:46,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:46,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684678954] [2020-10-26 19:29:46,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:46,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:46,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:46,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:46,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:51,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:51,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:29:51,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:29:51,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:29:51,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:51,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:29:51,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:51,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:29:51,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:29:51,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:51,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:51,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:51,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:51,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:51,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:51,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:29:51,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:51,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:51,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:51,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:51,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:51,561 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-26 19:29:51,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684678954] [2020-10-26 19:29:51,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:51,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:29:51,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795215151] [2020-10-26 19:29:51,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:29:51,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:51,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:29:51,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:29:51,564 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand 11 states. [2020-10-26 19:29:51,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:51,758 INFO L93 Difference]: Finished difference Result 101 states and 122 transitions. [2020-10-26 19:29:51,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:29:51,759 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-10-26 19:29:51,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:51,760 INFO L225 Difference]: With dead ends: 101 [2020-10-26 19:29:51,760 INFO L226 Difference]: Without dead ends: 65 [2020-10-26 19:29:51,761 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 19:29:51,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-26 19:29:51,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-10-26 19:29:51,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-26 19:29:51,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2020-10-26 19:29:51,768 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 52 [2020-10-26 19:29:51,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:51,769 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2020-10-26 19:29:51,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:29:51,769 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2020-10-26 19:29:51,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-26 19:29:51,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:51,770 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:51,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:29:51,771 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:51,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:51,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1108667164, now seen corresponding path program 8 times [2020-10-26 19:29:51,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:51,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197330112] [2020-10-26 19:29:51,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:51,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:51,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:51,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:51,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:56,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:56,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-26 19:29:56,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:29:56,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-26 19:29:56,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:56,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:29:56,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:56,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:29:56,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:56,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:56,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:56,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:56,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:56,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:56,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:56,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:29:56,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:56,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:56,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:56,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:56,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:56,997 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-26 19:29:56,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197330112] [2020-10-26 19:29:56,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:56,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:29:56,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149451960] [2020-10-26 19:29:56,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:29:57,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:57,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:29:57,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:29:57,001 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand 12 states. [2020-10-26 19:29:57,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:57,171 INFO L93 Difference]: Finished difference Result 109 states and 132 transitions. [2020-10-26 19:29:57,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:29:57,172 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-10-26 19:29:57,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:57,173 INFO L225 Difference]: With dead ends: 109 [2020-10-26 19:29:57,173 INFO L226 Difference]: Without dead ends: 70 [2020-10-26 19:29:57,176 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 19:29:57,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-26 19:29:57,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2020-10-26 19:29:57,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-26 19:29:57,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2020-10-26 19:29:57,191 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 57 [2020-10-26 19:29:57,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:57,191 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2020-10-26 19:29:57,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:29:57,191 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2020-10-26 19:29:57,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-26 19:29:57,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:57,197 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:57,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:29:57,198 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:57,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:57,199 INFO L82 PathProgramCache]: Analyzing trace with hash 287583989, now seen corresponding path program 9 times [2020-10-26 19:29:57,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:57,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215514480] [2020-10-26 19:29:57,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:57,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:57,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:57,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:57,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:02,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:02,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-26 19:30:02,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:30:02,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-26 19:30:02,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:02,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:30:02,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:02,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:30:02,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:02,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:02,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:02,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:02,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:02,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:02,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:02,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:30:02,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:02,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:02,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:02,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:02,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:02,431 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-10-26 19:30:02,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215514480] [2020-10-26 19:30:02,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:02,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:30:02,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922237172] [2020-10-26 19:30:02,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:30:02,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:02,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:30:02,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:30:02,435 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand 13 states. [2020-10-26 19:30:02,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:02,657 INFO L93 Difference]: Finished difference Result 117 states and 142 transitions. [2020-10-26 19:30:02,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:30:02,657 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 62 [2020-10-26 19:30:02,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:02,658 INFO L225 Difference]: With dead ends: 117 [2020-10-26 19:30:02,658 INFO L226 Difference]: Without dead ends: 75 [2020-10-26 19:30:02,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:30:02,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-26 19:30:02,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-10-26 19:30:02,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-26 19:30:02,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2020-10-26 19:30:02,677 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 62 [2020-10-26 19:30:02,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:02,678 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2020-10-26 19:30:02,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:30:02,678 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2020-10-26 19:30:02,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-26 19:30:02,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:02,680 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:02,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:30:02,682 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:02,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:02,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1781750024, now seen corresponding path program 10 times [2020-10-26 19:30:02,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:02,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251900883] [2020-10-26 19:30:02,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:02,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:02,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:02,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:03,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:07,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:07,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 19:30:07,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:30:07,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-26 19:30:07,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:07,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:30:07,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:07,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:30:07,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:07,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:07,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:07,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:07,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:07,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:07,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:07,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:07,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:07,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:07,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:07,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:07,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:30:07,927 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-10-26 19:30:07,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251900883] [2020-10-26 19:30:07,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:07,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:30:07,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508294075] [2020-10-26 19:30:07,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:30:07,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:07,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:30:07,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:30:07,930 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand 14 states. [2020-10-26 19:30:08,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:08,122 INFO L93 Difference]: Finished difference Result 125 states and 152 transitions. [2020-10-26 19:30:08,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:30:08,122 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-10-26 19:30:08,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:08,123 INFO L225 Difference]: With dead ends: 125 [2020-10-26 19:30:08,123 INFO L226 Difference]: Without dead ends: 80 [2020-10-26 19:30:08,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:30:08,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-26 19:30:08,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2020-10-26 19:30:08,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-26 19:30:08,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2020-10-26 19:30:08,137 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 67 [2020-10-26 19:30:08,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:08,137 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2020-10-26 19:30:08,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:30:08,140 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2020-10-26 19:30:08,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-26 19:30:08,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:08,141 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:08,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:30:08,142 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:08,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:08,142 INFO L82 PathProgramCache]: Analyzing trace with hash 781533977, now seen corresponding path program 11 times [2020-10-26 19:30:08,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:08,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869661624] [2020-10-26 19:30:08,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:08,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:08,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:08,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:08,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:13,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:13,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-26 19:30:13,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:30:13,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-26 19:30:13,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:13,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:30:13,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:13,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:30:13,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:13,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:13,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:13,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:13,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:13,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:13,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:13,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:30:13,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:13,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:13,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:13,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:13,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:13,417 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-10-26 19:30:13,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869661624] [2020-10-26 19:30:13,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:13,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:30:13,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131203728] [2020-10-26 19:30:13,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:30:13,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:13,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:30:13,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:30:13,420 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand 15 states. [2020-10-26 19:30:13,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:13,685 INFO L93 Difference]: Finished difference Result 133 states and 162 transitions. [2020-10-26 19:30:13,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:30:13,686 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 72 [2020-10-26 19:30:13,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:13,687 INFO L225 Difference]: With dead ends: 133 [2020-10-26 19:30:13,688 INFO L226 Difference]: Without dead ends: 85 [2020-10-26 19:30:13,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:30:13,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-26 19:30:13,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-10-26 19:30:13,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-26 19:30:13,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 96 transitions. [2020-10-26 19:30:13,707 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 96 transitions. Word has length 72 [2020-10-26 19:30:13,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:13,707 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 96 transitions. [2020-10-26 19:30:13,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:30:13,707 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 96 transitions. [2020-10-26 19:30:13,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-26 19:30:13,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:13,713 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:13,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:30:13,713 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:13,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:13,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1429130540, now seen corresponding path program 12 times [2020-10-26 19:30:13,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:13,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [315355611] [2020-10-26 19:30:13,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:13,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:13,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:13,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:13,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:18,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:18,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-26 19:30:18,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:30:18,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:30:18,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:18,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:30:18,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:18,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:30:18,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:19,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:19,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:19,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:19,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:19,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:19,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:19,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:19,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:19,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:19,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:19,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:19,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:19,053 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-26 19:30:19,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [315355611] [2020-10-26 19:30:19,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:19,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:30:19,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286643691] [2020-10-26 19:30:19,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:30:19,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:19,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:30:19,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:30:19,057 INFO L87 Difference]: Start difference. First operand 82 states and 96 transitions. Second operand 16 states. [2020-10-26 19:30:19,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:19,351 INFO L93 Difference]: Finished difference Result 141 states and 172 transitions. [2020-10-26 19:30:19,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:30:19,352 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 77 [2020-10-26 19:30:19,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:19,354 INFO L225 Difference]: With dead ends: 141 [2020-10-26 19:30:19,354 INFO L226 Difference]: Without dead ends: 90 [2020-10-26 19:30:19,356 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 19:30:19,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-26 19:30:19,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2020-10-26 19:30:19,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-26 19:30:19,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2020-10-26 19:30:19,370 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 77 [2020-10-26 19:30:19,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:19,371 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2020-10-26 19:30:19,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:30:19,371 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2020-10-26 19:30:19,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-26 19:30:19,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:19,373 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:19,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:30:19,373 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:19,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:19,374 INFO L82 PathProgramCache]: Analyzing trace with hash -764631235, now seen corresponding path program 13 times [2020-10-26 19:30:19,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:19,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813965280] [2020-10-26 19:30:19,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:19,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:19,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:19,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:19,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:24,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:24,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-26 19:30:24,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:30:24,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-26 19:30:24,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:24,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:30:24,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:24,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:30:24,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:24,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:24,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:24,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:24,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:24,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:24,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:24,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:30:24,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:24,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:24,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:24,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:24,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:24,669 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-10-26 19:30:24,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813965280] [2020-10-26 19:30:24,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:24,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:30:24,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188792949] [2020-10-26 19:30:24,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:30:24,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:24,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:30:24,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:30:24,673 INFO L87 Difference]: Start difference. First operand 87 states and 102 transitions. Second operand 17 states. [2020-10-26 19:30:24,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:24,942 INFO L93 Difference]: Finished difference Result 149 states and 182 transitions. [2020-10-26 19:30:24,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:30:24,943 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-10-26 19:30:24,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:24,945 INFO L225 Difference]: With dead ends: 149 [2020-10-26 19:30:24,945 INFO L226 Difference]: Without dead ends: 95 [2020-10-26 19:30:24,946 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 19:30:24,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-26 19:30:24,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2020-10-26 19:30:24,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-26 19:30:24,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 108 transitions. [2020-10-26 19:30:24,957 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 108 transitions. Word has length 82 [2020-10-26 19:30:24,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:24,957 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 108 transitions. [2020-10-26 19:30:24,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:30:24,958 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 108 transitions. [2020-10-26 19:30:24,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-26 19:30:24,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:24,959 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:24,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:30:24,959 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:24,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:24,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1180938576, now seen corresponding path program 14 times [2020-10-26 19:30:24,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:24,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561834913] [2020-10-26 19:30:24,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:24,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:24,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:25,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:25,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:30,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:30,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-26 19:30:30,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:30:30,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-26 19:30:30,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:30,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:30:30,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:30,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:30:30,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:30,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:30,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:30,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:30,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:30,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:30,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:30,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:30,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:30,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:30,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:30,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:30,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:30,327 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-10-26 19:30:30,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561834913] [2020-10-26 19:30:30,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:30,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:30:30,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546669135] [2020-10-26 19:30:30,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:30:30,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:30,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:30:30,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:30:30,329 INFO L87 Difference]: Start difference. First operand 92 states and 108 transitions. Second operand 18 states. [2020-10-26 19:30:30,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:30,631 INFO L93 Difference]: Finished difference Result 157 states and 192 transitions. [2020-10-26 19:30:30,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:30:30,632 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 87 [2020-10-26 19:30:30,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:30,633 INFO L225 Difference]: With dead ends: 157 [2020-10-26 19:30:30,634 INFO L226 Difference]: Without dead ends: 100 [2020-10-26 19:30:30,635 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 19:30:30,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-26 19:30:30,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2020-10-26 19:30:30,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-26 19:30:30,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 114 transitions. [2020-10-26 19:30:30,642 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 114 transitions. Word has length 87 [2020-10-26 19:30:30,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:30,643 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 114 transitions. [2020-10-26 19:30:30,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:30:30,643 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 114 transitions. [2020-10-26 19:30:30,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-26 19:30:30,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:30,644 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:30,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:30:30,644 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:30,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:30,645 INFO L82 PathProgramCache]: Analyzing trace with hash -386884767, now seen corresponding path program 15 times [2020-10-26 19:30:30,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:30,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322759244] [2020-10-26 19:30:30,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:30,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:30,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:30,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:31,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:35,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:35,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-26 19:30:35,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:30:35,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-26 19:30:35,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:35,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:30:35,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:35,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:30:35,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:35,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:35,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:35,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:35,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:35,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:35,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:35,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:35,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:35,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:35,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:35,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:35,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:36,005 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-26 19:30:36,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322759244] [2020-10-26 19:30:36,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:36,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:30:36,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966604923] [2020-10-26 19:30:36,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:30:36,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:36,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:30:36,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:30:36,010 INFO L87 Difference]: Start difference. First operand 97 states and 114 transitions. Second operand 19 states. [2020-10-26 19:30:36,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:36,351 INFO L93 Difference]: Finished difference Result 165 states and 202 transitions. [2020-10-26 19:30:36,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:30:36,351 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 92 [2020-10-26 19:30:36,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:36,353 INFO L225 Difference]: With dead ends: 165 [2020-10-26 19:30:36,353 INFO L226 Difference]: Without dead ends: 105 [2020-10-26 19:30:36,356 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 19:30:36,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-26 19:30:36,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 102. [2020-10-26 19:30:36,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-26 19:30:36,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 120 transitions. [2020-10-26 19:30:36,362 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 120 transitions. Word has length 92 [2020-10-26 19:30:36,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:36,363 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 120 transitions. [2020-10-26 19:30:36,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:30:36,363 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 120 transitions. [2020-10-26 19:30:36,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-26 19:30:36,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:36,364 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:36,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:30:36,364 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:36,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:36,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1210563212, now seen corresponding path program 16 times [2020-10-26 19:30:36,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:36,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109953477] [2020-10-26 19:30:36,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:36,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:36,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:36,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:37,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:41,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:41,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-26 19:30:41,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:30:41,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5072 [2020-10-26 19:30:41,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:41,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:30:41,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:41,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:30:41,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:41,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:41,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:41,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:41,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:41,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:41,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:41,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:30:41,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:41,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:41,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:41,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:41,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:41,759 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-10-26 19:30:41,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109953477] [2020-10-26 19:30:41,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:41,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:30:41,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876093857] [2020-10-26 19:30:41,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:30:41,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:41,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:30:41,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:30:41,771 INFO L87 Difference]: Start difference. First operand 102 states and 120 transitions. Second operand 20 states. [2020-10-26 19:30:41,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:41,997 INFO L93 Difference]: Finished difference Result 173 states and 212 transitions. [2020-10-26 19:30:41,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:30:41,997 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 97 [2020-10-26 19:30:41,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:41,999 INFO L225 Difference]: With dead ends: 173 [2020-10-26 19:30:41,999 INFO L226 Difference]: Without dead ends: 110 [2020-10-26 19:30:42,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:30:42,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-26 19:30:42,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2020-10-26 19:30:42,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-26 19:30:42,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 126 transitions. [2020-10-26 19:30:42,007 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 126 transitions. Word has length 97 [2020-10-26 19:30:42,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:42,007 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 126 transitions. [2020-10-26 19:30:42,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:30:42,007 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 126 transitions. [2020-10-26 19:30:42,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-26 19:30:42,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:42,012 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:42,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:30:42,012 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:42,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:42,012 INFO L82 PathProgramCache]: Analyzing trace with hash -488153211, now seen corresponding path program 17 times [2020-10-26 19:30:42,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:42,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135418108] [2020-10-26 19:30:42,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:42,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:42,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:42,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:43,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:47,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:47,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 19:30:47,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:30:47,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:30:47,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:47,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:30:47,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:47,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:30:47,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:47,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:47,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:47,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:47,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:47,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:47,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:47,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:47,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:47,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:47,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:47,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:47,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:47,409 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-10-26 19:30:47,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135418108] [2020-10-26 19:30:47,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:47,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:30:47,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356186252] [2020-10-26 19:30:47,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:30:47,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:47,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:30:47,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:30:47,414 INFO L87 Difference]: Start difference. First operand 107 states and 126 transitions. Second operand 21 states. [2020-10-26 19:30:47,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:47,712 INFO L93 Difference]: Finished difference Result 181 states and 222 transitions. [2020-10-26 19:30:47,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:30:47,717 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 102 [2020-10-26 19:30:47,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:47,718 INFO L225 Difference]: With dead ends: 181 [2020-10-26 19:30:47,718 INFO L226 Difference]: Without dead ends: 115 [2020-10-26 19:30:47,719 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 19:30:47,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-26 19:30:47,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2020-10-26 19:30:47,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-26 19:30:47,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 132 transitions. [2020-10-26 19:30:47,728 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 132 transitions. Word has length 102 [2020-10-26 19:30:47,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:47,728 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 132 transitions. [2020-10-26 19:30:47,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:30:47,728 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 132 transitions. [2020-10-26 19:30:47,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-26 19:30:47,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:47,729 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:47,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:30:47,730 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:47,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:47,730 INFO L82 PathProgramCache]: Analyzing trace with hash -2048051608, now seen corresponding path program 18 times [2020-10-26 19:30:47,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:47,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1987060099] [2020-10-26 19:30:47,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:47,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:47,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:47,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:48,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:52,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:52,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 19:30:52,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:30:52,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-26 19:30:52,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:52,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:30:52,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:52,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:30:52,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:53,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:53,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:53,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:53,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:53,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:53,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:53,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:30:53,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:53,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:53,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:53,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:53,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:30:53,171 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-10-26 19:30:53,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1987060099] [2020-10-26 19:30:53,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:53,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:30:53,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564789871] [2020-10-26 19:30:53,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:30:53,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:53,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:30:53,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:30:53,176 INFO L87 Difference]: Start difference. First operand 112 states and 132 transitions. Second operand 22 states. [2020-10-26 19:30:53,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:53,494 INFO L93 Difference]: Finished difference Result 189 states and 232 transitions. [2020-10-26 19:30:53,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:30:53,495 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 107 [2020-10-26 19:30:53,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:53,496 INFO L225 Difference]: With dead ends: 189 [2020-10-26 19:30:53,496 INFO L226 Difference]: Without dead ends: 120 [2020-10-26 19:30:53,497 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 19:30:53,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-26 19:30:53,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2020-10-26 19:30:53,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-26 19:30:53,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 138 transitions. [2020-10-26 19:30:53,513 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 138 transitions. Word has length 107 [2020-10-26 19:30:53,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:53,515 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 138 transitions. [2020-10-26 19:30:53,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:30:53,515 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 138 transitions. [2020-10-26 19:30:53,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-26 19:30:53,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:53,518 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:53,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:30:53,518 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:53,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:53,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1503081385, now seen corresponding path program 19 times [2020-10-26 19:30:53,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:53,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368970221] [2020-10-26 19:30:53,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:53,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:53,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:53,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:57,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:58,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:58,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-26 19:30:58,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:30:58,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-26 19:30:58,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:58,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:30:58,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:58,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:30:58,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:58,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:58,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:58,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:58,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:58,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:58,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:58,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:58,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:58,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:58,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:58,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:58,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:58,961 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-10-26 19:30:58,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368970221] [2020-10-26 19:30:58,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:58,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:30:58,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300052846] [2020-10-26 19:30:58,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:30:58,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:58,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:30:58,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:30:58,964 INFO L87 Difference]: Start difference. First operand 117 states and 138 transitions. Second operand 23 states. [2020-10-26 19:30:59,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:59,335 INFO L93 Difference]: Finished difference Result 197 states and 242 transitions. [2020-10-26 19:30:59,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:30:59,336 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 112 [2020-10-26 19:30:59,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:59,337 INFO L225 Difference]: With dead ends: 197 [2020-10-26 19:30:59,338 INFO L226 Difference]: Without dead ends: 125 [2020-10-26 19:30:59,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:30:59,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-26 19:30:59,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2020-10-26 19:30:59,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-26 19:30:59,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 144 transitions. [2020-10-26 19:30:59,347 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 144 transitions. Word has length 112 [2020-10-26 19:30:59,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:59,347 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 144 transitions. [2020-10-26 19:30:59,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:30:59,348 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 144 transitions. [2020-10-26 19:30:59,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-26 19:30:59,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:59,349 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:59,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:30:59,349 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:59,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:59,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1478065596, now seen corresponding path program 20 times [2020-10-26 19:30:59,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:59,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130160175] [2020-10-26 19:30:59,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:59,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:59,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:59,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:04,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:04,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:04,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-26 19:31:04,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:31:04,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-26 19:31:04,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:04,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:31:04,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:04,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:31:04,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:04,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:04,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:04,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:04,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:04,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:04,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:04,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:04,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:04,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:04,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:04,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:04,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:04,849 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-10-26 19:31:04,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130160175] [2020-10-26 19:31:04,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:04,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:31:04,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905976320] [2020-10-26 19:31:04,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:31:04,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:04,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:31:04,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:31:04,851 INFO L87 Difference]: Start difference. First operand 122 states and 144 transitions. Second operand 24 states. [2020-10-26 19:31:05,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:05,238 INFO L93 Difference]: Finished difference Result 205 states and 252 transitions. [2020-10-26 19:31:05,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:31:05,239 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 117 [2020-10-26 19:31:05,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:05,240 INFO L225 Difference]: With dead ends: 205 [2020-10-26 19:31:05,240 INFO L226 Difference]: Without dead ends: 130 [2020-10-26 19:31:05,241 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 19:31:05,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-26 19:31:05,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2020-10-26 19:31:05,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-26 19:31:05,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 150 transitions. [2020-10-26 19:31:05,247 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 150 transitions. Word has length 117 [2020-10-26 19:31:05,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:05,248 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 150 transitions. [2020-10-26 19:31:05,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:31:05,248 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 150 transitions. [2020-10-26 19:31:05,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-26 19:31:05,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:05,249 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:05,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:31:05,250 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:05,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:05,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1295624243, now seen corresponding path program 21 times [2020-10-26 19:31:05,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:05,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878097767] [2020-10-26 19:31:05,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:05,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:05,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:05,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:10,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:10,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 19:31:10,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:31:10,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-26 19:31:10,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:10,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:31:10,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:10,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:31:10,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:10,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:10,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:10,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:10,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:10,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:10,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:10,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:31:10,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:10,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:10,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:10,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:10,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:10,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2020-10-26 19:31:10,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878097767] [2020-10-26 19:31:10,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:10,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:31:10,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602933955] [2020-10-26 19:31:10,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:31:10,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:10,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:31:10,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:31:10,756 INFO L87 Difference]: Start difference. First operand 127 states and 150 transitions. Second operand 25 states. [2020-10-26 19:31:11,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:11,069 INFO L93 Difference]: Finished difference Result 213 states and 262 transitions. [2020-10-26 19:31:11,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:31:11,070 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 122 [2020-10-26 19:31:11,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:11,072 INFO L225 Difference]: With dead ends: 213 [2020-10-26 19:31:11,072 INFO L226 Difference]: Without dead ends: 135 [2020-10-26 19:31:11,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:31:11,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-26 19:31:11,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2020-10-26 19:31:11,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-26 19:31:11,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 156 transitions. [2020-10-26 19:31:11,079 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 156 transitions. Word has length 122 [2020-10-26 19:31:11,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:11,080 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 156 transitions. [2020-10-26 19:31:11,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:31:11,080 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 156 transitions. [2020-10-26 19:31:11,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-26 19:31:11,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:11,081 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:11,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:31:11,082 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:11,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:11,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1150115360, now seen corresponding path program 22 times [2020-10-26 19:31:11,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:11,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268949476] [2020-10-26 19:31:11,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:11,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:11,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:11,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:16,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:16,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-26 19:31:16,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:31:16,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5093 [2020-10-26 19:31:16,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:16,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:31:16,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:16,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:31:16,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:16,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:16,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:16,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:16,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:16,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:16,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:16,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:16,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:16,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:16,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:16,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:16,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:16,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-10-26 19:31:16,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268949476] [2020-10-26 19:31:16,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:16,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:31:16,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476058708] [2020-10-26 19:31:16,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:31:16,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:16,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:31:16,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:31:16,717 INFO L87 Difference]: Start difference. First operand 132 states and 156 transitions. Second operand 26 states. [2020-10-26 19:31:17,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:17,043 INFO L93 Difference]: Finished difference Result 221 states and 272 transitions. [2020-10-26 19:31:17,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:31:17,044 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 127 [2020-10-26 19:31:17,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:17,046 INFO L225 Difference]: With dead ends: 221 [2020-10-26 19:31:17,046 INFO L226 Difference]: Without dead ends: 140 [2020-10-26 19:31:17,047 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 19:31:17,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-26 19:31:17,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 137. [2020-10-26 19:31:17,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-26 19:31:17,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 162 transitions. [2020-10-26 19:31:17,054 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 162 transitions. Word has length 127 [2020-10-26 19:31:17,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:17,055 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 162 transitions. [2020-10-26 19:31:17,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:31:17,055 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 162 transitions. [2020-10-26 19:31:17,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-26 19:31:17,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:17,057 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:17,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:31:17,057 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:17,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:17,057 INFO L82 PathProgramCache]: Analyzing trace with hash -994374671, now seen corresponding path program 23 times [2020-10-26 19:31:17,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:17,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411425348] [2020-10-26 19:31:17,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:17,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:17,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:17,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:22,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:22,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-26 19:31:22,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:31:22,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5090 [2020-10-26 19:31:22,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:22,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:31:22,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:22,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:31:22,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:22,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:22,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:22,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:22,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:22,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:22,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:22,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:22,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:22,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:22,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:22,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:22,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:22,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2020-10-26 19:31:22,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411425348] [2020-10-26 19:31:22,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:22,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:31:22,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796257625] [2020-10-26 19:31:22,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:31:22,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:22,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:31:22,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:31:22,726 INFO L87 Difference]: Start difference. First operand 137 states and 162 transitions. Second operand 27 states. [2020-10-26 19:31:23,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:23,164 INFO L93 Difference]: Finished difference Result 229 states and 282 transitions. [2020-10-26 19:31:23,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:31:23,164 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 132 [2020-10-26 19:31:23,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:23,166 INFO L225 Difference]: With dead ends: 229 [2020-10-26 19:31:23,166 INFO L226 Difference]: Without dead ends: 145 [2020-10-26 19:31:23,167 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 19:31:23,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-26 19:31:23,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 142. [2020-10-26 19:31:23,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-26 19:31:23,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 168 transitions. [2020-10-26 19:31:23,174 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 168 transitions. Word has length 132 [2020-10-26 19:31:23,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:23,174 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 168 transitions. [2020-10-26 19:31:23,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:31:23,175 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 168 transitions. [2020-10-26 19:31:23,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-26 19:31:23,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:23,176 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:23,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:31:23,177 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:23,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:23,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1344566788, now seen corresponding path program 24 times [2020-10-26 19:31:23,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:23,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043037449] [2020-10-26 19:31:23,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:23,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:23,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:23,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:28,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:28,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-26 19:31:28,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:31:28,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5105 [2020-10-26 19:31:28,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:28,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:31:28,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:28,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:31:28,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:28,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:28,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:28,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:28,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:28,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:28,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:28,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:28,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:28,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:28,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:28,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:28,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:28,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-10-26 19:31:28,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043037449] [2020-10-26 19:31:28,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:28,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:31:28,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835333537] [2020-10-26 19:31:28,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:31:28,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:28,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:31:28,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:31:28,894 INFO L87 Difference]: Start difference. First operand 142 states and 168 transitions. Second operand 28 states. [2020-10-26 19:31:29,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:29,349 INFO L93 Difference]: Finished difference Result 237 states and 292 transitions. [2020-10-26 19:31:29,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:31:29,350 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 137 [2020-10-26 19:31:29,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:29,351 INFO L225 Difference]: With dead ends: 237 [2020-10-26 19:31:29,351 INFO L226 Difference]: Without dead ends: 150 [2020-10-26 19:31:29,352 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 19:31:29,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-26 19:31:29,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2020-10-26 19:31:29,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-26 19:31:29,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 174 transitions. [2020-10-26 19:31:29,360 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 174 transitions. Word has length 137 [2020-10-26 19:31:29,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:29,360 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 174 transitions. [2020-10-26 19:31:29,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:31:29,360 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 174 transitions. [2020-10-26 19:31:29,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-26 19:31:29,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:29,362 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:29,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:31:29,362 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:29,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:29,363 INFO L82 PathProgramCache]: Analyzing trace with hash 2050723861, now seen corresponding path program 25 times [2020-10-26 19:31:29,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:29,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752093126] [2020-10-26 19:31:29,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:29,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:29,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:29,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:34,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:34,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-26 19:31:34,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:31:34,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-26 19:31:34,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:34,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:31:34,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:34,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:31:34,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:35,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:35,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:35,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:35,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:35,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:35,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:35,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:35,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:35,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:35,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:35,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:35,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:35,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2020-10-26 19:31:35,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752093126] [2020-10-26 19:31:35,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:35,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:31:35,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053782488] [2020-10-26 19:31:35,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:31:35,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:35,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:31:35,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:31:35,059 INFO L87 Difference]: Start difference. First operand 147 states and 174 transitions. Second operand 29 states. [2020-10-26 19:31:35,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:35,476 INFO L93 Difference]: Finished difference Result 245 states and 302 transitions. [2020-10-26 19:31:35,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:31:35,477 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 142 [2020-10-26 19:31:35,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:35,478 INFO L225 Difference]: With dead ends: 245 [2020-10-26 19:31:35,478 INFO L226 Difference]: Without dead ends: 155 [2020-10-26 19:31:35,479 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 19:31:35,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-26 19:31:35,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2020-10-26 19:31:35,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-26 19:31:35,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 180 transitions. [2020-10-26 19:31:35,489 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 180 transitions. Word has length 142 [2020-10-26 19:31:35,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:35,489 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 180 transitions. [2020-10-26 19:31:35,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:31:35,489 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 180 transitions. [2020-10-26 19:31:35,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-26 19:31:35,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:35,493 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:35,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:31:35,494 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:35,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:35,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1464518104, now seen corresponding path program 26 times [2020-10-26 19:31:35,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:35,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471145261] [2020-10-26 19:31:35,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:35,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:35,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:35,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:40,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:40,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-26 19:31:40,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:31:40,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5102 [2020-10-26 19:31:40,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:40,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:31:40,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:40,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:31:40,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:41,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:41,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:41,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:41,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:41,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:41,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:41,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:41,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:41,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:41,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:41,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:41,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:41,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2020-10-26 19:31:41,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471145261] [2020-10-26 19:31:41,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:41,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:31:41,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079780586] [2020-10-26 19:31:41,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:31:41,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:41,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:31:41,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:31:41,298 INFO L87 Difference]: Start difference. First operand 152 states and 180 transitions. Second operand 30 states. [2020-10-26 19:31:41,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:41,772 INFO L93 Difference]: Finished difference Result 253 states and 312 transitions. [2020-10-26 19:31:41,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:31:41,773 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 147 [2020-10-26 19:31:41,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:41,774 INFO L225 Difference]: With dead ends: 253 [2020-10-26 19:31:41,774 INFO L226 Difference]: Without dead ends: 160 [2020-10-26 19:31:41,775 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 19:31:41,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-26 19:31:41,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 157. [2020-10-26 19:31:41,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-26 19:31:41,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 186 transitions. [2020-10-26 19:31:41,782 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 186 transitions. Word has length 147 [2020-10-26 19:31:41,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:41,782 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 186 transitions. [2020-10-26 19:31:41,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:31:41,782 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 186 transitions. [2020-10-26 19:31:41,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-26 19:31:41,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:41,783 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:41,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:31:41,784 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:41,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:41,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1989026873, now seen corresponding path program 27 times [2020-10-26 19:31:41,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:41,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786670608] [2020-10-26 19:31:41,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:41,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:41,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:41,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:46,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:46,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-26 19:31:46,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:31:46,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:31:46,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:46,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:31:46,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:46,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:31:46,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:47,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:47,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:47,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:47,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:47,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:47,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:47,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:47,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:47,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:47,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:47,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:47,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:47,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2020-10-26 19:31:47,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786670608] [2020-10-26 19:31:47,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:47,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:31:47,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056980635] [2020-10-26 19:31:47,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:31:47,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:47,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:31:47,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:31:47,543 INFO L87 Difference]: Start difference. First operand 157 states and 186 transitions. Second operand 31 states. [2020-10-26 19:31:48,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:48,036 INFO L93 Difference]: Finished difference Result 261 states and 322 transitions. [2020-10-26 19:31:48,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:31:48,037 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 152 [2020-10-26 19:31:48,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:48,039 INFO L225 Difference]: With dead ends: 261 [2020-10-26 19:31:48,039 INFO L226 Difference]: Without dead ends: 165 [2020-10-26 19:31:48,040 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 19:31:48,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-26 19:31:48,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 162. [2020-10-26 19:31:48,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-26 19:31:48,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 192 transitions. [2020-10-26 19:31:48,048 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 192 transitions. Word has length 152 [2020-10-26 19:31:48,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:48,048 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 192 transitions. [2020-10-26 19:31:48,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:31:48,049 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 192 transitions. [2020-10-26 19:31:48,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-26 19:31:48,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:48,050 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:48,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:31:48,050 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:48,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:48,051 INFO L82 PathProgramCache]: Analyzing trace with hash 500486580, now seen corresponding path program 28 times [2020-10-26 19:31:48,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:48,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055489491] [2020-10-26 19:31:48,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:48,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:48,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:48,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:53,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:53,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-26 19:31:53,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:31:53,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5076 [2020-10-26 19:31:53,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:53,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:31:53,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:53,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:31:53,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:53,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:53,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:53,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:53,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:53,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:53,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:53,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:31:53,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:53,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:53,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:53,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:53,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:53,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1162 trivial. 0 not checked. [2020-10-26 19:31:53,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055489491] [2020-10-26 19:31:53,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:53,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:31:53,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293679828] [2020-10-26 19:31:53,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:31:53,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:53,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:31:53,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:31:53,923 INFO L87 Difference]: Start difference. First operand 162 states and 192 transitions. Second operand 32 states. [2020-10-26 19:31:54,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:54,473 INFO L93 Difference]: Finished difference Result 269 states and 332 transitions. [2020-10-26 19:31:54,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:31:54,474 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 157 [2020-10-26 19:31:54,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:54,475 INFO L225 Difference]: With dead ends: 269 [2020-10-26 19:31:54,476 INFO L226 Difference]: Without dead ends: 170 [2020-10-26 19:31:54,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:31:54,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-26 19:31:54,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 167. [2020-10-26 19:31:54,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-26 19:31:54,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 198 transitions. [2020-10-26 19:31:54,497 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 198 transitions. Word has length 157 [2020-10-26 19:31:54,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:54,497 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 198 transitions. [2020-10-26 19:31:54,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:31:54,497 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 198 transitions. [2020-10-26 19:31:54,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-26 19:31:54,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:54,498 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:54,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:31:54,499 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:54,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:54,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1183250339, now seen corresponding path program 29 times [2020-10-26 19:31:54,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:54,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233056778] [2020-10-26 19:31:54,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:54,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:54,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:54,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:59,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:59,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-26 19:31:59,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:31:59,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5094 [2020-10-26 19:31:59,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:59,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:31:59,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:59,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:31:59,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:00,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:00,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:00,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:00,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:00,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:00,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:00,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:32:00,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:00,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:00,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:00,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:00,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:00,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2020-10-26 19:32:00,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233056778] [2020-10-26 19:32:00,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:00,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:32:00,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373892842] [2020-10-26 19:32:00,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:32:00,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:00,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:32:00,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:32:00,409 INFO L87 Difference]: Start difference. First operand 167 states and 198 transitions. Second operand 33 states. [2020-10-26 19:32:00,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:00,980 INFO L93 Difference]: Finished difference Result 277 states and 342 transitions. [2020-10-26 19:32:00,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:32:00,984 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 162 [2020-10-26 19:32:00,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:00,986 INFO L225 Difference]: With dead ends: 277 [2020-10-26 19:32:00,986 INFO L226 Difference]: Without dead ends: 175 [2020-10-26 19:32:00,987 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 19:32:00,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-26 19:32:00,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 172. [2020-10-26 19:32:00,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-26 19:32:00,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 204 transitions. [2020-10-26 19:32:00,994 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 204 transitions. Word has length 162 [2020-10-26 19:32:00,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:00,994 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 204 transitions. [2020-10-26 19:32:00,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:32:00,995 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 204 transitions. [2020-10-26 19:32:00,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-26 19:32:00,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:00,996 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:00,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:32:00,996 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:00,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:00,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1208783472, now seen corresponding path program 30 times [2020-10-26 19:32:00,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:00,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481978842] [2020-10-26 19:32:00,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:01,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:01,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:01,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:06,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:06,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-26 19:32:06,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:32:06,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5062 [2020-10-26 19:32:06,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:06,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:32:06,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:06,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 19:32:06,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:06,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:06,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:06,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:06,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:06,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:06,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:06,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:32:06,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:06,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:06,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:06,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:06,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:06,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2020-10-26 19:32:06,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481978842] [2020-10-26 19:32:06,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:06,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:32:06,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428019634] [2020-10-26 19:32:06,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:32:06,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:06,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:32:06,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:32:06,916 INFO L87 Difference]: Start difference. First operand 172 states and 204 transitions. Second operand 34 states. [2020-10-26 19:32:07,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:07,334 INFO L93 Difference]: Finished difference Result 285 states and 352 transitions. [2020-10-26 19:32:07,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:32:07,335 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 167 [2020-10-26 19:32:07,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:07,337 INFO L225 Difference]: With dead ends: 285 [2020-10-26 19:32:07,337 INFO L226 Difference]: Without dead ends: 180 [2020-10-26 19:32:07,338 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 19:32:07,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-26 19:32:07,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 177. [2020-10-26 19:32:07,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-26 19:32:07,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 210 transitions. [2020-10-26 19:32:07,346 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 210 transitions. Word has length 167 [2020-10-26 19:32:07,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:07,346 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 210 transitions. [2020-10-26 19:32:07,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:32:07,346 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 210 transitions. [2020-10-26 19:32:07,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-26 19:32:07,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:07,352 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:07,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:32:07,352 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:07,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:07,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1128430721, now seen corresponding path program 31 times [2020-10-26 19:32:07,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:07,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802840473] [2020-10-26 19:32:07,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:07,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:07,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:07,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:12,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:12,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-26 19:32:12,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:32:12,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-26 19:32:12,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:12,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:32:12,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:12,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-26 19:32:12,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:13,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:13,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:13,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:13,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:13,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:13,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:13,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:13,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:13,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:13,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:13,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:13,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:13,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2387 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2020-10-26 19:32:13,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802840473] [2020-10-26 19:32:13,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:13,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:32:13,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544769698] [2020-10-26 19:32:13,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:32:13,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:13,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:32:13,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:32:13,310 INFO L87 Difference]: Start difference. First operand 177 states and 210 transitions. Second operand 35 states. [2020-10-26 19:32:13,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:13,881 INFO L93 Difference]: Finished difference Result 293 states and 362 transitions. [2020-10-26 19:32:13,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:32:13,882 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 172 [2020-10-26 19:32:13,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:13,886 INFO L225 Difference]: With dead ends: 293 [2020-10-26 19:32:13,886 INFO L226 Difference]: Without dead ends: 185 [2020-10-26 19:32:13,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:32:13,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-26 19:32:13,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2020-10-26 19:32:13,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-26 19:32:13,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 216 transitions. [2020-10-26 19:32:13,898 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 216 transitions. Word has length 172 [2020-10-26 19:32:13,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:13,900 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 216 transitions. [2020-10-26 19:32:13,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:32:13,900 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 216 transitions. [2020-10-26 19:32:13,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-26 19:32:13,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:13,901 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:13,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:32:13,902 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:13,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:13,902 INFO L82 PathProgramCache]: Analyzing trace with hash 127949164, now seen corresponding path program 32 times [2020-10-26 19:32:13,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:13,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689439395] [2020-10-26 19:32:13,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:13,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:13,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:14,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:19,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:19,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-10-26 19:32:19,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:32:19,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5063 [2020-10-26 19:32:19,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:19,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:32:19,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:19,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-26 19:32:19,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:19,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:19,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:19,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:19,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:19,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:19,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:19,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:19,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:19,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:19,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:19,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:19,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:19,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2020-10-26 19:32:19,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689439395] [2020-10-26 19:32:19,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:19,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-26 19:32:19,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009869095] [2020-10-26 19:32:19,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 19:32:19,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:19,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 19:32:19,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:32:19,935 INFO L87 Difference]: Start difference. First operand 182 states and 216 transitions. Second operand 36 states. [2020-10-26 19:32:20,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:20,545 INFO L93 Difference]: Finished difference Result 301 states and 372 transitions. [2020-10-26 19:32:20,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:32:20,546 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 177 [2020-10-26 19:32:20,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:20,548 INFO L225 Difference]: With dead ends: 301 [2020-10-26 19:32:20,548 INFO L226 Difference]: Without dead ends: 190 [2020-10-26 19:32:20,549 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 19:32:20,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-26 19:32:20,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 187. [2020-10-26 19:32:20,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-26 19:32:20,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 222 transitions. [2020-10-26 19:32:20,556 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 222 transitions. Word has length 177 [2020-10-26 19:32:20,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:20,557 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 222 transitions. [2020-10-26 19:32:20,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 19:32:20,557 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 222 transitions. [2020-10-26 19:32:20,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-26 19:32:20,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:20,558 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:20,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:32:20,558 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:20,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:20,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1196375899, now seen corresponding path program 33 times [2020-10-26 19:32:20,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:20,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [662137192] [2020-10-26 19:32:20,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:20,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:20,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:20,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:25,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:25,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 192 [2020-10-26 19:32:25,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:32:25,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5179 [2020-10-26 19:32:25,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:25,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:32:25,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:25,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-26 19:32:25,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:26,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:26,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:26,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:26,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:26,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:26,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:26,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:26,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:26,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:26,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:26,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:26,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:26,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2020-10-26 19:32:26,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [662137192] [2020-10-26 19:32:26,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:26,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:32:26,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459763660] [2020-10-26 19:32:26,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:32:26,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:26,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:32:26,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:32:26,763 INFO L87 Difference]: Start difference. First operand 187 states and 222 transitions. Second operand 37 states. [2020-10-26 19:32:27,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:27,424 INFO L93 Difference]: Finished difference Result 309 states and 382 transitions. [2020-10-26 19:32:27,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:32:27,424 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 182 [2020-10-26 19:32:27,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:27,426 INFO L225 Difference]: With dead ends: 309 [2020-10-26 19:32:27,426 INFO L226 Difference]: Without dead ends: 195 [2020-10-26 19:32:27,429 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 19:32:27,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-26 19:32:27,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 192. [2020-10-26 19:32:27,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-26 19:32:27,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 228 transitions. [2020-10-26 19:32:27,438 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 228 transitions. Word has length 182 [2020-10-26 19:32:27,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:27,438 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 228 transitions. [2020-10-26 19:32:27,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:32:27,439 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 228 transitions. [2020-10-26 19:32:27,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-26 19:32:27,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:27,440 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:27,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:32:27,440 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:27,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:27,441 INFO L82 PathProgramCache]: Analyzing trace with hash 2018858312, now seen corresponding path program 34 times [2020-10-26 19:32:27,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:27,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016010365] [2020-10-26 19:32:27,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:27,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:27,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:27,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:32,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:32,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 197 [2020-10-26 19:32:32,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:32:32,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5102 [2020-10-26 19:32:32,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:32,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:32:32,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:32,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 19:32:32,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:33,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:33,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:33,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:33,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:33,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:33,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:33,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:33,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:33,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:33,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:33,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:33,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:33,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2873 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 1717 trivial. 0 not checked. [2020-10-26 19:32:33,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1016010365] [2020-10-26 19:32:33,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:33,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-26 19:32:33,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696289981] [2020-10-26 19:32:33,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-26 19:32:33,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:33,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-26 19:32:33,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:32:33,619 INFO L87 Difference]: Start difference. First operand 192 states and 228 transitions. Second operand 38 states. [2020-10-26 19:32:34,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:34,280 INFO L93 Difference]: Finished difference Result 317 states and 392 transitions. [2020-10-26 19:32:34,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:32:34,281 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 187 [2020-10-26 19:32:34,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:34,282 INFO L225 Difference]: With dead ends: 317 [2020-10-26 19:32:34,282 INFO L226 Difference]: Without dead ends: 200 [2020-10-26 19:32:34,284 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 19:32:34,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-26 19:32:34,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 197. [2020-10-26 19:32:34,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-26 19:32:34,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 234 transitions. [2020-10-26 19:32:34,292 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 234 transitions. Word has length 187 [2020-10-26 19:32:34,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:34,292 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 234 transitions. [2020-10-26 19:32:34,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-26 19:32:34,292 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 234 transitions. [2020-10-26 19:32:34,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-10-26 19:32:34,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:34,293 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:34,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:32:34,294 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:34,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:34,294 INFO L82 PathProgramCache]: Analyzing trace with hash 118101193, now seen corresponding path program 35 times [2020-10-26 19:32:34,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:34,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575563172] [2020-10-26 19:32:34,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:34,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:34,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:34,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:39,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:39,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 202 [2020-10-26 19:32:39,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:32:39,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5147 [2020-10-26 19:32:39,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:39,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:32:39,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:39,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-26 19:32:39,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:40,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:40,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:40,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:40,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:40,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:40,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:40,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:32:40,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:40,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:40,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:40,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:40,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:40,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 1820 trivial. 0 not checked. [2020-10-26 19:32:40,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575563172] [2020-10-26 19:32:40,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:40,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:32:40,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944736504] [2020-10-26 19:32:40,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:32:40,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:40,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:32:40,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:32:40,572 INFO L87 Difference]: Start difference. First operand 197 states and 234 transitions. Second operand 39 states. [2020-10-26 19:32:41,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:41,153 INFO L93 Difference]: Finished difference Result 325 states and 402 transitions. [2020-10-26 19:32:41,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:32:41,153 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 192 [2020-10-26 19:32:41,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:41,155 INFO L225 Difference]: With dead ends: 325 [2020-10-26 19:32:41,155 INFO L226 Difference]: Without dead ends: 205 [2020-10-26 19:32:41,156 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 19:32:41,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-26 19:32:41,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 202. [2020-10-26 19:32:41,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-26 19:32:41,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 240 transitions. [2020-10-26 19:32:41,164 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 240 transitions. Word has length 192 [2020-10-26 19:32:41,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:41,164 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 240 transitions. [2020-10-26 19:32:41,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:32:41,164 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 240 transitions. [2020-10-26 19:32:41,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-26 19:32:41,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:41,166 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:41,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:32:41,166 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:41,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:41,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1527521572, now seen corresponding path program 36 times [2020-10-26 19:32:41,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:41,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909063536] [2020-10-26 19:32:41,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:41,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:41,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:41,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:46,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:46,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 207 [2020-10-26 19:32:46,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:32:46,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5154 [2020-10-26 19:32:46,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:46,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-26 19:32:46,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:46,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 19:32:46,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:47,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:47,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:47,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:47,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:47,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:47,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:47,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:32:47,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:47,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:47,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:47,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:47,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:47,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3222 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 1926 trivial. 0 not checked. [2020-10-26 19:32:47,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909063536] [2020-10-26 19:32:47,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:47,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-26 19:32:47,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137569202] [2020-10-26 19:32:47,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-26 19:32:47,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:47,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-26 19:32:47,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:32:47,529 INFO L87 Difference]: Start difference. First operand 202 states and 240 transitions. Second operand 40 states. [2020-10-26 19:32:48,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:48,191 INFO L93 Difference]: Finished difference Result 333 states and 412 transitions. [2020-10-26 19:32:48,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:32:48,192 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 197 [2020-10-26 19:32:48,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:48,193 INFO L225 Difference]: With dead ends: 333 [2020-10-26 19:32:48,194 INFO L226 Difference]: Without dead ends: 210 [2020-10-26 19:32:48,195 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 19:32:48,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-26 19:32:48,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 207. [2020-10-26 19:32:48,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-26 19:32:48,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 246 transitions. [2020-10-26 19:32:48,205 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 246 transitions. Word has length 197 [2020-10-26 19:32:48,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:48,206 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 246 transitions. [2020-10-26 19:32:48,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-26 19:32:48,206 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 246 transitions. [2020-10-26 19:32:48,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-10-26 19:32:48,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:48,207 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:48,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-26 19:32:48,207 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:48,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:48,208 INFO L82 PathProgramCache]: Analyzing trace with hash 135575789, now seen corresponding path program 37 times [2020-10-26 19:32:48,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:48,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2008930034] [2020-10-26 19:32:48,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:48,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:48,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:48,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:53,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:53,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 212 [2020-10-26 19:32:53,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:32:53,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-26 19:32:53,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:53,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-26 19:32:53,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:53,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 19:32:53,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:54,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:54,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:54,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:54,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:54,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:54,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:54,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:54,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:54,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:54,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:54,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:54,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:54,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2020-10-26 19:32:54,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2008930034] [2020-10-26 19:32:54,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:54,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-26 19:32:54,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391121706] [2020-10-26 19:32:54,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-26 19:32:54,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:54,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-26 19:32:54,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:32:54,481 INFO L87 Difference]: Start difference. First operand 207 states and 246 transitions. Second operand 41 states. [2020-10-26 19:32:55,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:55,200 INFO L93 Difference]: Finished difference Result 341 states and 422 transitions. [2020-10-26 19:32:55,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-26 19:32:55,200 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 202 [2020-10-26 19:32:55,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:55,202 INFO L225 Difference]: With dead ends: 341 [2020-10-26 19:32:55,202 INFO L226 Difference]: Without dead ends: 215 [2020-10-26 19:32:55,203 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 19:32:55,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-26 19:32:55,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 212. [2020-10-26 19:32:55,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-26 19:32:55,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 252 transitions. [2020-10-26 19:32:55,211 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 252 transitions. Word has length 202 [2020-10-26 19:32:55,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:55,211 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 252 transitions. [2020-10-26 19:32:55,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-26 19:32:55,212 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 252 transitions. [2020-10-26 19:32:55,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-26 19:32:55,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:55,213 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:55,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-26 19:32:55,213 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:55,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:55,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1111391488, now seen corresponding path program 38 times [2020-10-26 19:32:55,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:55,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330878723] [2020-10-26 19:32:55,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:55,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:55,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:55,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:00,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:00,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-26 19:33:00,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:33:00,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5229 [2020-10-26 19:33:00,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:00,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-26 19:33:00,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:00,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 19:33:00,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:01,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:01,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:01,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:01,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:01,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:01,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:01,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:33:01,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:01,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:01,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:01,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:01,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:01,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3591 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 2147 trivial. 0 not checked. [2020-10-26 19:33:01,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330878723] [2020-10-26 19:33:01,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:01,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-26 19:33:01,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082204629] [2020-10-26 19:33:01,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-26 19:33:01,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:01,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-26 19:33:01,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:33:01,753 INFO L87 Difference]: Start difference. First operand 212 states and 252 transitions. Second operand 42 states. [2020-10-26 19:33:02,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:02,486 INFO L93 Difference]: Finished difference Result 349 states and 432 transitions. [2020-10-26 19:33:02,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-26 19:33:02,487 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 207 [2020-10-26 19:33:02,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:02,489 INFO L225 Difference]: With dead ends: 349 [2020-10-26 19:33:02,489 INFO L226 Difference]: Without dead ends: 220 [2020-10-26 19:33:02,490 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 19:33:02,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-26 19:33:02,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 217. [2020-10-26 19:33:02,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-26 19:33:02,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 258 transitions. [2020-10-26 19:33:02,497 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 258 transitions. Word has length 207 [2020-10-26 19:33:02,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:02,498 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 258 transitions. [2020-10-26 19:33:02,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-26 19:33:02,498 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 258 transitions. [2020-10-26 19:33:02,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-10-26 19:33:02,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:02,499 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:02,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-26 19:33:02,500 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:02,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:02,500 INFO L82 PathProgramCache]: Analyzing trace with hash 639036689, now seen corresponding path program 39 times [2020-10-26 19:33:02,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:02,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457235678] [2020-10-26 19:33:02,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:02,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:02,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:02,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking...