/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_copy5_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:17:39,379 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:17:39,382 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:17:39,442 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:17:39,442 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:17:39,449 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:17:39,452 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:17:39,457 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:17:39,463 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:17:39,470 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:17:39,471 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:17:39,473 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:17:39,474 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:17:39,477 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:17:39,480 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:17:39,486 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:17:39,487 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:17:39,489 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:17:39,503 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:17:39,505 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:17:39,507 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:17:39,509 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:17:39,510 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:17:39,511 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:17:39,514 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:17:39,515 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:17:39,515 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:17:39,517 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:17:39,517 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:17:39,519 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:17:39,519 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:17:39,520 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:17:39,521 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:17:39,522 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:17:39,523 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:17:39,524 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:17:39,524 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:17:39,525 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:17:39,525 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:17:39,526 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:17:39,527 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:17:39,528 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 19:17:39,556 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:17:39,557 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:17:39,558 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:17:39,559 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:17:39,559 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:17:39,559 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:17:39,559 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:17:39,559 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:17:39,560 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:17:39,560 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:17:39,560 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:17:39,560 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:17:39,561 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:17:39,561 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:17:39,561 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:17:39,561 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:17:39,561 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:17:39,562 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:17:39,562 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:17:39,562 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:17:39,562 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:17:39,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:17:39,563 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:17:39,563 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:17:39,563 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:17:39,563 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:17:39,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:17:39,564 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:17:39,564 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:17:39,564 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:17:39,962 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:17:40,005 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:17:40,010 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:17:40,012 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:17:40,012 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:17:40,013 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy5_ground-2.i [2020-10-26 19:17:40,114 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/83f04c433/21db06eed7e04b1c961380bdfe6e219d/FLAGfdc53258f [2020-10-26 19:17:40,862 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:17:40,863 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy5_ground-2.i [2020-10-26 19:17:40,873 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/83f04c433/21db06eed7e04b1c961380bdfe6e219d/FLAGfdc53258f [2020-10-26 19:17:41,196 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/83f04c433/21db06eed7e04b1c961380bdfe6e219d [2020-10-26 19:17:41,201 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:17:41,207 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:17:41,208 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:17:41,209 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:17:41,213 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:17:41,214 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:17:41" (1/1) ... [2020-10-26 19:17:41,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b05068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:41, skipping insertion in model container [2020-10-26 19:17:41,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:17:41" (1/1) ... [2020-10-26 19:17:41,228 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:17:41,248 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:17:41,425 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:17:41,434 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:17:41,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:17:41,479 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:17:41,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:41 WrapperNode [2020-10-26 19:17:41,479 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:17:41,481 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:17:41,481 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:17:41,481 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:17:41,494 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:41" (1/1) ... [2020-10-26 19:17:41,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:41" (1/1) ... [2020-10-26 19:17:41,503 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:41" (1/1) ... [2020-10-26 19:17:41,503 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:41" (1/1) ... [2020-10-26 19:17:41,514 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:41" (1/1) ... [2020-10-26 19:17:41,521 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:41" (1/1) ... [2020-10-26 19:17:41,523 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:41" (1/1) ... [2020-10-26 19:17:41,527 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:17:41,528 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:17:41,528 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:17:41,528 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:17:41,532 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:41" (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 19:17:41,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:17:41,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:17:41,622 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:17:41,622 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:17:41,622 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:17:41,622 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:17:41,622 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:17:41,623 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:17:41,623 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:17:41,623 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:17:41,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:17:41,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:17:41,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:17:41,624 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:17:41,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:17:41,624 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:17:41,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:17:41,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:17:41,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:17:41,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:17:42,120 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:17:42,120 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-10-26 19:17:42,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:17:42 BoogieIcfgContainer [2020-10-26 19:17:42,123 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:17:42,128 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:17:42,133 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:17:42,137 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:17:42,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:17:41" (1/3) ... [2020-10-26 19:17:42,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e57894f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:17:42, skipping insertion in model container [2020-10-26 19:17:42,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:41" (2/3) ... [2020-10-26 19:17:42,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e57894f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:17:42, skipping insertion in model container [2020-10-26 19:17:42,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:17:42" (3/3) ... [2020-10-26 19:17:42,143 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy5_ground-2.i [2020-10-26 19:17:42,157 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:17:42,164 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:17:42,181 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:17:42,238 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:17:42,238 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:17:42,239 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:17:42,239 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:17:42,239 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:17:42,239 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:17:42,239 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:17:42,240 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:17:42,267 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-26 19:17:42,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-26 19:17:42,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:42,282 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:42,282 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:42,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:42,296 INFO L82 PathProgramCache]: Analyzing trace with hash 235794212, now seen corresponding path program 1 times [2020-10-26 19:17:42,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:42,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364104978] [2020-10-26 19:17:42,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:42,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:42,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:42,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:42,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:42,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:42,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:42,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:43,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:43,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 19:17:43,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:17:43,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1125 [2020-10-26 19:17:43,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:43,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:43,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:17:43,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:43,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:17:43,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:43,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:43,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:43,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:43,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:43,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:43,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:17:43,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:43,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:43,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:43,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:43,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:43,748 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 19:17:43,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364104978] [2020-10-26 19:17:43,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:17:43,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 19:17:43,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100828122] [2020-10-26 19:17:43,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 19:17:43,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:43,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 19:17:43,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:17:43,777 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-10-26 19:17:43,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:43,911 INFO L93 Difference]: Finished difference Result 77 states and 107 transitions. [2020-10-26 19:17:43,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 19:17:43,913 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-10-26 19:17:43,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:43,921 INFO L225 Difference]: With dead ends: 77 [2020-10-26 19:17:43,922 INFO L226 Difference]: Without dead ends: 36 [2020-10-26 19:17:43,925 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 19:17:43,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-26 19:17:43,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-26 19:17:43,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-26 19:17:43,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-26 19:17:43,972 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 25 [2020-10-26 19:17:43,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:43,973 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-26 19:17:43,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 19:17:43,973 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-26 19:17:43,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-26 19:17:43,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:43,975 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:43,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:17:43,975 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:43,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:43,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1022358290, now seen corresponding path program 1 times [2020-10-26 19:17:43,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:43,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803446134] [2020-10-26 19:17:43,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:43,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:43,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:44,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:44,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:44,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:44,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:44,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:45,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:45,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 19:17:45,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:17:45,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1568 [2020-10-26 19:17:45,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:45,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:17:45,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:45,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:17:45,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:45,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:45,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:45,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:45,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:45,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:45,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:45,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:17:45,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:45,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:45,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:45,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:45,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:45,621 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 19:17:45,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803446134] [2020-10-26 19:17:45,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:17:45,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:17:45,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006865877] [2020-10-26 19:17:45,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:17:45,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:45,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:17:45,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:17:45,626 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 4 states. [2020-10-26 19:17:45,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:45,736 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2020-10-26 19:17:45,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:17:45,737 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-26 19:17:45,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:45,738 INFO L225 Difference]: With dead ends: 66 [2020-10-26 19:17:45,738 INFO L226 Difference]: Without dead ends: 38 [2020-10-26 19:17:45,740 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 19:17:45,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-26 19:17:45,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-26 19:17:45,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-26 19:17:45,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-10-26 19:17:45,749 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 25 [2020-10-26 19:17:45,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:45,750 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-10-26 19:17:45,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:17:45,750 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-10-26 19:17:45,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 19:17:45,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:45,751 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:45,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:17:45,752 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:45,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:45,752 INFO L82 PathProgramCache]: Analyzing trace with hash 613603184, now seen corresponding path program 1 times [2020-10-26 19:17:45,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:45,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8014542] [2020-10-26 19:17:45,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:45,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:45,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:45,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:45,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:45,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:45,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:45,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:48,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:48,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-26 19:17:48,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:17:48,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2264 [2020-10-26 19:17:48,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:48,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:17:48,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:48,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:17:48,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:48,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:48,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:48,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:48,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:48,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:48,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:48,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:17:48,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:48,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:48,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:48,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:48,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:17:48,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:48,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8014542] [2020-10-26 19:17:48,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:48,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:17:48,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103638383] [2020-10-26 19:17:48,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:17:48,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:48,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:17:48,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:17:48,119 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 5 states. [2020-10-26 19:17:48,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:48,291 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2020-10-26 19:17:48,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:17:48,291 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-10-26 19:17:48,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:48,292 INFO L225 Difference]: With dead ends: 68 [2020-10-26 19:17:48,293 INFO L226 Difference]: Without dead ends: 40 [2020-10-26 19:17:48,294 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 19:17:48,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-26 19:17:48,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-26 19:17:48,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-26 19:17:48,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2020-10-26 19:17:48,301 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 27 [2020-10-26 19:17:48,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:48,302 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2020-10-26 19:17:48,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:17:48,302 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-10-26 19:17:48,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-26 19:17:48,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:48,303 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:48,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:17:48,304 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:48,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:48,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1358029746, now seen corresponding path program 2 times [2020-10-26 19:17:48,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:48,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978332572] [2020-10-26 19:17:48,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:48,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:48,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:48,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:48,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:48,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:48,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:48,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:51,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:51,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 19:17:51,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:17:51,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3294 [2020-10-26 19:17:51,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:51,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:17:51,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:51,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:17:51,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:51,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:51,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:51,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:51,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:51,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:51,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:51,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:17:51,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:51,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:51,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:51,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:51,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:51,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:51,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978332572] [2020-10-26 19:17:51,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:51,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:17:51,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908302309] [2020-10-26 19:17:51,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:17:51,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:51,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:17:51,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:17:51,690 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 6 states. [2020-10-26 19:17:51,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:51,802 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2020-10-26 19:17:51,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:17:51,803 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-26 19:17:51,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:51,804 INFO L225 Difference]: With dead ends: 70 [2020-10-26 19:17:51,804 INFO L226 Difference]: Without dead ends: 42 [2020-10-26 19:17:51,805 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 19:17:51,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-26 19:17:51,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-26 19:17:51,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-26 19:17:51,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-10-26 19:17:51,812 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 29 [2020-10-26 19:17:51,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:51,813 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-10-26 19:17:51,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:17:51,813 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-10-26 19:17:51,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-26 19:17:51,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:51,814 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:51,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:17:51,815 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:51,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:51,815 INFO L82 PathProgramCache]: Analyzing trace with hash -2016697940, now seen corresponding path program 3 times [2020-10-26 19:17:51,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:51,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044051864] [2020-10-26 19:17:51,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:51,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:51,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:51,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:51,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:51,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:51,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:51,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:55,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:55,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-26 19:17:55,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:17:55,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4059 [2020-10-26 19:17:55,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:55,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:17:55,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:55,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:17:55,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:55,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:55,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:55,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:55,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:55,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:55,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:55,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:17:55,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:55,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:55,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:55,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:55,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:55,960 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:55,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044051864] [2020-10-26 19:17:55,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:55,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:17:55,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20130525] [2020-10-26 19:17:55,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:17:55,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:55,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:17:55,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:17:55,963 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 7 states. [2020-10-26 19:17:56,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:56,080 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2020-10-26 19:17:56,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:17:56,080 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-10-26 19:17:56,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:56,081 INFO L225 Difference]: With dead ends: 72 [2020-10-26 19:17:56,081 INFO L226 Difference]: Without dead ends: 44 [2020-10-26 19:17:56,082 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 19:17:56,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-26 19:17:56,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-26 19:17:56,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-26 19:17:56,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-10-26 19:17:56,089 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 31 [2020-10-26 19:17:56,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:56,089 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-10-26 19:17:56,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:17:56,089 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-10-26 19:17:56,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 19:17:56,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:56,091 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:56,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:17:56,091 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:56,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:56,092 INFO L82 PathProgramCache]: Analyzing trace with hash 658327434, now seen corresponding path program 4 times [2020-10-26 19:17:56,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:56,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943556361] [2020-10-26 19:17:56,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:56,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:56,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:56,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:56,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:56,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:56,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:56,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:01,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:01,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 19:18:01,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:18:01,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:18:01,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:01,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:18:01,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:01,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:18:01,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:01,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:01,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:01,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:01,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:01,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:01,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:01,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:18:01,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:01,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:01,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:01,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:01,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:18:01,195 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:01,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943556361] [2020-10-26 19:18:01,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:01,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:18:01,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112821733] [2020-10-26 19:18:01,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:18:01,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:01,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:18:01,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:18:01,202 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 8 states. [2020-10-26 19:18:01,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:01,340 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2020-10-26 19:18:01,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:18:01,341 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-26 19:18:01,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:01,342 INFO L225 Difference]: With dead ends: 74 [2020-10-26 19:18:01,343 INFO L226 Difference]: Without dead ends: 46 [2020-10-26 19:18:01,344 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 19:18:01,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-26 19:18:01,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-26 19:18:01,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-26 19:18:01,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2020-10-26 19:18:01,355 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 33 [2020-10-26 19:18:01,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:01,356 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2020-10-26 19:18:01,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:18:01,356 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2020-10-26 19:18:01,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-26 19:18:01,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:01,358 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:01,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:18:01,358 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:01,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:01,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1327698456, now seen corresponding path program 5 times [2020-10-26 19:18:01,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:01,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760074086] [2020-10-26 19:18:01,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:01,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:01,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:01,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:01,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:01,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:01,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:01,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:06,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:06,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-26 19:18:06,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:18:06,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:18:06,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:06,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:18:06,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:06,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:18:06,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:06,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:06,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:06,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:06,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:06,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:06,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:06,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:18:06,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:06,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:06,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:06,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:06,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:06,479 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:06,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760074086] [2020-10-26 19:18:06,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:06,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:18:06,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231122767] [2020-10-26 19:18:06,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:18:06,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:06,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:18:06,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:18:06,482 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand 9 states. [2020-10-26 19:18:06,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:06,610 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2020-10-26 19:18:06,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:18:06,610 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-10-26 19:18:06,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:06,612 INFO L225 Difference]: With dead ends: 76 [2020-10-26 19:18:06,612 INFO L226 Difference]: Without dead ends: 48 [2020-10-26 19:18:06,612 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 19:18:06,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-26 19:18:06,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-26 19:18:06,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-26 19:18:06,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-10-26 19:18:06,624 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 35 [2020-10-26 19:18:06,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:06,625 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-10-26 19:18:06,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:18:06,625 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-10-26 19:18:06,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-26 19:18:06,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:06,627 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:06,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:18:06,627 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:06,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:06,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1361867974, now seen corresponding path program 6 times [2020-10-26 19:18:06,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:06,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417866598] [2020-10-26 19:18:06,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:06,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:06,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:06,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:06,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:06,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:06,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:07,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:11,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:11,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-26 19:18:11,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:18:11,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:18:11,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:11,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:18:11,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:11,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:18:11,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:11,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:11,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:11,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:11,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:11,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:11,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:11,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:18:11,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:11,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:11,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:11,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:11,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:11,783 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:11,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417866598] [2020-10-26 19:18:11,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:11,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:18:11,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055306268] [2020-10-26 19:18:11,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:18:11,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:11,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:18:11,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:18:11,787 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 10 states. [2020-10-26 19:18:11,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:11,908 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2020-10-26 19:18:11,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:18:11,908 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-10-26 19:18:11,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:11,909 INFO L225 Difference]: With dead ends: 78 [2020-10-26 19:18:11,909 INFO L226 Difference]: Without dead ends: 50 [2020-10-26 19:18:11,910 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 19:18:11,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-26 19:18:11,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-26 19:18:11,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-26 19:18:11,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2020-10-26 19:18:11,922 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 37 [2020-10-26 19:18:11,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:11,923 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2020-10-26 19:18:11,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:18:11,923 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2020-10-26 19:18:11,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-26 19:18:11,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:11,924 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:11,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:18:11,924 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:11,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:11,926 INFO L82 PathProgramCache]: Analyzing trace with hash 464895012, now seen corresponding path program 7 times [2020-10-26 19:18:11,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:11,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58649468] [2020-10-26 19:18:11,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:11,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:11,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:11,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:11,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:11,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:12,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:12,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:16,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:16,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 19:18:16,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:18:16,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:18:16,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:16,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:18:16,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:16,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:18:16,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:17,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:17,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:17,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:17,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:17,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:17,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:17,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:18:17,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:17,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:17,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:17,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:17,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:17,061 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:17,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58649468] [2020-10-26 19:18:17,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:17,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:18:17,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999814581] [2020-10-26 19:18:17,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:18:17,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:17,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:18:17,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:18:17,064 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 11 states. [2020-10-26 19:18:17,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:17,186 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2020-10-26 19:18:17,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:18:17,186 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-10-26 19:18:17,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:17,187 INFO L225 Difference]: With dead ends: 80 [2020-10-26 19:18:17,187 INFO L226 Difference]: Without dead ends: 52 [2020-10-26 19:18:17,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:18:17,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-26 19:18:17,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-26 19:18:17,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-26 19:18:17,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2020-10-26 19:18:17,194 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 39 [2020-10-26 19:18:17,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:17,194 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2020-10-26 19:18:17,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:18:17,195 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2020-10-26 19:18:17,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-26 19:18:17,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:17,195 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:17,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:18:17,196 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:17,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:17,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1762305026, now seen corresponding path program 8 times [2020-10-26 19:18:17,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:17,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83373772] [2020-10-26 19:18:17,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:17,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:17,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:17,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:17,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:17,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:17,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:17,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:22,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:22,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-26 19:18:22,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:18:22,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:18:22,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:22,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:18:22,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:22,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:18:22,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:22,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:22,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:22,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:22,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:22,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:22,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:22,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:18:22,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:22,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:22,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:22,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:22,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:22,351 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:22,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83373772] [2020-10-26 19:18:22,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:22,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:18:22,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660807705] [2020-10-26 19:18:22,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:18:22,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:22,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:18:22,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:18:22,354 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 12 states. [2020-10-26 19:18:22,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:22,490 INFO L93 Difference]: Finished difference Result 82 states and 94 transitions. [2020-10-26 19:18:22,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:18:22,490 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-10-26 19:18:22,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:22,491 INFO L225 Difference]: With dead ends: 82 [2020-10-26 19:18:22,491 INFO L226 Difference]: Without dead ends: 54 [2020-10-26 19:18:22,494 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 19:18:22,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-26 19:18:22,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-26 19:18:22,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-26 19:18:22,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-10-26 19:18:22,504 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 41 [2020-10-26 19:18:22,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:22,504 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-10-26 19:18:22,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:18:22,504 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-10-26 19:18:22,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 19:18:22,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:22,505 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:22,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:18:22,506 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:22,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:22,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1262154656, now seen corresponding path program 9 times [2020-10-26 19:18:22,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:22,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882349163] [2020-10-26 19:18:22,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:22,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:22,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:22,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:22,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:22,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:22,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:23,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:27,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:27,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-26 19:18:27,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:18:27,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:18:27,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:27,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:18:27,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:27,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:18:27,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:27,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:27,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:27,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:27,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:27,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:27,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:27,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:18:27,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:27,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:27,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:27,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:27,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:27,680 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:27,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882349163] [2020-10-26 19:18:27,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:27,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:18:27,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424424460] [2020-10-26 19:18:27,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:18:27,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:27,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:18:27,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:18:27,682 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 13 states. [2020-10-26 19:18:27,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:27,793 INFO L93 Difference]: Finished difference Result 84 states and 96 transitions. [2020-10-26 19:18:27,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:18:27,793 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2020-10-26 19:18:27,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:27,794 INFO L225 Difference]: With dead ends: 84 [2020-10-26 19:18:27,794 INFO L226 Difference]: Without dead ends: 56 [2020-10-26 19:18:27,795 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 19:18:27,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-26 19:18:27,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-26 19:18:27,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-26 19:18:27,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2020-10-26 19:18:27,800 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 43 [2020-10-26 19:18:27,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:27,801 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2020-10-26 19:18:27,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:18:27,801 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2020-10-26 19:18:27,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 19:18:27,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:27,802 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:27,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:18:27,802 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:27,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:27,803 INFO L82 PathProgramCache]: Analyzing trace with hash -75049666, now seen corresponding path program 10 times [2020-10-26 19:18:27,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:27,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610212291] [2020-10-26 19:18:27,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:27,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:27,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:27,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:27,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:27,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:27,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:28,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:32,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:32,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:18:32,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:18:32,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:18:32,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:32,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:18:32,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:32,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:18:32,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:32,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:32,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:32,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:32,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:32,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:32,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:32,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:18:32,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:32,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:32,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:32,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:32,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:32,979 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:32,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610212291] [2020-10-26 19:18:32,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:32,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:18:32,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570484517] [2020-10-26 19:18:32,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:18:32,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:32,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:18:32,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:18:32,982 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 14 states. [2020-10-26 19:18:33,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:33,128 INFO L93 Difference]: Finished difference Result 86 states and 98 transitions. [2020-10-26 19:18:33,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:18:33,129 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2020-10-26 19:18:33,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:33,130 INFO L225 Difference]: With dead ends: 86 [2020-10-26 19:18:33,130 INFO L226 Difference]: Without dead ends: 58 [2020-10-26 19:18:33,130 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 19:18:33,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-26 19:18:33,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-26 19:18:33,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-26 19:18:33,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2020-10-26 19:18:33,136 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 45 [2020-10-26 19:18:33,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:33,136 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2020-10-26 19:18:33,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:18:33,136 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2020-10-26 19:18:33,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-26 19:18:33,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:33,137 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:33,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:18:33,137 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:33,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:33,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1728455012, now seen corresponding path program 11 times [2020-10-26 19:18:33,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:33,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241350983] [2020-10-26 19:18:33,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:33,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:33,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:33,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:33,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:33,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:33,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:33,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:38,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:38,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:18:38,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:18:38,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 19:18:38,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:38,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:18:38,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:38,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:18:38,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:38,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:38,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:38,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:38,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:38,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:38,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:38,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:18:38,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:38,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:38,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:38,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:38,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:38,322 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:38,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241350983] [2020-10-26 19:18:38,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:38,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:18:38,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035355074] [2020-10-26 19:18:38,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:18:38,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:38,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:18:38,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:18:38,325 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand 15 states. [2020-10-26 19:18:38,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:38,481 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2020-10-26 19:18:38,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:18:38,482 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 47 [2020-10-26 19:18:38,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:38,483 INFO L225 Difference]: With dead ends: 88 [2020-10-26 19:18:38,483 INFO L226 Difference]: Without dead ends: 60 [2020-10-26 19:18:38,484 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 19:18:38,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-26 19:18:38,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-26 19:18:38,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-26 19:18:38,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2020-10-26 19:18:38,491 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 47 [2020-10-26 19:18:38,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:38,492 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2020-10-26 19:18:38,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:18:38,492 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2020-10-26 19:18:38,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-26 19:18:38,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:38,492 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:38,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:18:38,493 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:38,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:38,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1513092998, now seen corresponding path program 12 times [2020-10-26 19:18:38,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:38,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636574430] [2020-10-26 19:18:38,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:38,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:38,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:38,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:38,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:38,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:38,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:39,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:43,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:43,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 19:18:43,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:18:43,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:18:43,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:43,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:18:43,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:43,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:18:43,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:43,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:43,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:43,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:43,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:43,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:43,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:43,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:18:43,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:43,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:43,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:43,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:43,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:43,708 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:43,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636574430] [2020-10-26 19:18:43,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:43,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:18:43,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056137698] [2020-10-26 19:18:43,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:18:43,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:43,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:18:43,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:18:43,710 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand 16 states. [2020-10-26 19:18:43,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:43,872 INFO L93 Difference]: Finished difference Result 90 states and 102 transitions. [2020-10-26 19:18:43,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:18:43,872 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 49 [2020-10-26 19:18:43,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:43,875 INFO L225 Difference]: With dead ends: 90 [2020-10-26 19:18:43,875 INFO L226 Difference]: Without dead ends: 62 [2020-10-26 19:18:43,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:18:43,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-26 19:18:43,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-26 19:18:43,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-26 19:18:43,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2020-10-26 19:18:43,889 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 49 [2020-10-26 19:18:43,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:43,889 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2020-10-26 19:18:43,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:18:43,889 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2020-10-26 19:18:43,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-26 19:18:43,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:43,891 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:43,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:18:43,892 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:43,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:43,892 INFO L82 PathProgramCache]: Analyzing trace with hash -708627752, now seen corresponding path program 13 times [2020-10-26 19:18:43,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:43,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209001971] [2020-10-26 19:18:43,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:43,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:43,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:43,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:43,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:43,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:44,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:44,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:48,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:48,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-26 19:18:48,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:18:48,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:18:48,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:48,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:18:48,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:48,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:18:48,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:49,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:49,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:49,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:49,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:49,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:49,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:49,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:18:49,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:49,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:49,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:49,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:49,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:49,141 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:49,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209001971] [2020-10-26 19:18:49,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:49,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:18:49,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022505581] [2020-10-26 19:18:49,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:18:49,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:49,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:18:49,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:18:49,144 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand 17 states. [2020-10-26 19:18:49,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:49,374 INFO L93 Difference]: Finished difference Result 92 states and 104 transitions. [2020-10-26 19:18:49,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:18:49,374 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 51 [2020-10-26 19:18:49,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:49,375 INFO L225 Difference]: With dead ends: 92 [2020-10-26 19:18:49,375 INFO L226 Difference]: Without dead ends: 64 [2020-10-26 19:18:49,376 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 19:18:49,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-26 19:18:49,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-10-26 19:18:49,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-26 19:18:49,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2020-10-26 19:18:49,386 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 51 [2020-10-26 19:18:49,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:49,386 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2020-10-26 19:18:49,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:18:49,386 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2020-10-26 19:18:49,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:18:49,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:49,388 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:49,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:18:49,388 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:49,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:49,389 INFO L82 PathProgramCache]: Analyzing trace with hash -711639626, now seen corresponding path program 14 times [2020-10-26 19:18:49,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:49,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448374180] [2020-10-26 19:18:49,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:49,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:49,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:49,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:49,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:49,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:50,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:50,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:54,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:54,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:18:54,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:18:54,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:18:54,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:54,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:18:54,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:54,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:18:54,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:54,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:54,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:54,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:54,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:54,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:54,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:54,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:18:54,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:54,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:54,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:54,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:54,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:54,638 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:54,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448374180] [2020-10-26 19:18:54,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:54,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:18:54,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090944183] [2020-10-26 19:18:54,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:18:54,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:54,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:18:54,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:18:54,644 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand 18 states. [2020-10-26 19:18:54,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:54,825 INFO L93 Difference]: Finished difference Result 94 states and 106 transitions. [2020-10-26 19:18:54,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:18:54,825 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 53 [2020-10-26 19:18:54,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:54,826 INFO L225 Difference]: With dead ends: 94 [2020-10-26 19:18:54,826 INFO L226 Difference]: Without dead ends: 66 [2020-10-26 19:18:54,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:18:54,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-26 19:18:54,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-26 19:18:54,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-26 19:18:54,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2020-10-26 19:18:54,835 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 53 [2020-10-26 19:18:54,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:54,836 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2020-10-26 19:18:54,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:18:54,836 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2020-10-26 19:18:54,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-26 19:18:54,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:54,845 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:54,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:18:54,846 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:54,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:54,846 INFO L82 PathProgramCache]: Analyzing trace with hash 688916756, now seen corresponding path program 15 times [2020-10-26 19:18:54,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:54,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1455080083] [2020-10-26 19:18:54,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:54,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:54,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:54,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:54,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:54,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:55,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:55,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:59,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:59,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 19:18:59,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:18:59,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 19:18:59,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:59,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:18:59,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:59,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:18:59,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:00,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:00,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:00,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:00,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:00,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:00,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:00,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:19:00,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:00,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:00,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:00,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:00,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:00,104 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:00,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1455080083] [2020-10-26 19:19:00,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:00,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:19:00,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741572499] [2020-10-26 19:19:00,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:19:00,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:00,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:19:00,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:19:00,106 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand 19 states. [2020-10-26 19:19:00,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:00,280 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2020-10-26 19:19:00,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:19:00,280 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2020-10-26 19:19:00,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:00,282 INFO L225 Difference]: With dead ends: 96 [2020-10-26 19:19:00,282 INFO L226 Difference]: Without dead ends: 68 [2020-10-26 19:19:00,283 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 19:19:00,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-26 19:19:00,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-10-26 19:19:00,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-26 19:19:00,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2020-10-26 19:19:00,296 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 55 [2020-10-26 19:19:00,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:00,296 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2020-10-26 19:19:00,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:19:00,297 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2020-10-26 19:19:00,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-26 19:19:00,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:00,297 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:00,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:19:00,298 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:00,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:00,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1996131086, now seen corresponding path program 16 times [2020-10-26 19:19:00,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:00,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120814145] [2020-10-26 19:19:00,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:00,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:00,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:00,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:00,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:00,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:01,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:01,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:05,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:05,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-26 19:19:05,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:19:05,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:19:05,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:05,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:19:05,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:05,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:19:05,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:05,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:05,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:05,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:05,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:05,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:05,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:05,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:19:05,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:05,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:05,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:05,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:05,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:05,593 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:05,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120814145] [2020-10-26 19:19:05,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:05,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:19:05,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023647613] [2020-10-26 19:19:05,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:19:05,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:05,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:19:05,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:19:05,604 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 20 states. [2020-10-26 19:19:05,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:05,801 INFO L93 Difference]: Finished difference Result 98 states and 110 transitions. [2020-10-26 19:19:05,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:19:05,802 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 57 [2020-10-26 19:19:05,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:05,803 INFO L225 Difference]: With dead ends: 98 [2020-10-26 19:19:05,803 INFO L226 Difference]: Without dead ends: 70 [2020-10-26 19:19:05,804 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 19:19:05,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-26 19:19:05,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-26 19:19:05,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-26 19:19:05,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2020-10-26 19:19:05,809 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 57 [2020-10-26 19:19:05,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:05,809 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2020-10-26 19:19:05,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:19:05,809 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2020-10-26 19:19:05,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-26 19:19:05,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:05,810 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:05,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:19:05,810 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:05,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:05,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1051762352, now seen corresponding path program 17 times [2020-10-26 19:19:05,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:05,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392293871] [2020-10-26 19:19:05,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:05,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:05,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:05,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:05,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:05,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:07,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:07,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:10,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:10,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-26 19:19:10,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:19:10,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:19:10,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:10,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:19:10,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:10,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:19:10,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:11,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:11,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:11,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:11,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:11,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:11,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:11,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:19:11,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:11,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:11,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:11,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:11,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:11,101 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:11,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392293871] [2020-10-26 19:19:11,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:11,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:19:11,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201384517] [2020-10-26 19:19:11,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:19:11,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:11,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:19:11,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:19:11,105 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand 21 states. [2020-10-26 19:19:11,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:11,315 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2020-10-26 19:19:11,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:19:11,316 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 59 [2020-10-26 19:19:11,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:11,317 INFO L225 Difference]: With dead ends: 100 [2020-10-26 19:19:11,317 INFO L226 Difference]: Without dead ends: 72 [2020-10-26 19:19:11,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:19:11,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-26 19:19:11,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-10-26 19:19:11,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-26 19:19:11,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2020-10-26 19:19:11,323 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 59 [2020-10-26 19:19:11,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:11,324 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2020-10-26 19:19:11,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:19:11,324 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2020-10-26 19:19:11,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-26 19:19:11,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:11,325 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:11,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:19:11,325 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:11,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:11,326 INFO L82 PathProgramCache]: Analyzing trace with hash 248491566, now seen corresponding path program 18 times [2020-10-26 19:19:11,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:11,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342254413] [2020-10-26 19:19:11,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:11,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:11,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:11,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:11,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:11,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:12,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:16,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:16,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:16,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 19:19:16,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:19:16,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:19:16,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:16,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:19:16,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:16,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:19:16,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:16,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:16,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:16,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:16,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:16,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:16,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:16,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:19:16,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:16,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:16,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:16,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:16,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:16,632 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:16,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342254413] [2020-10-26 19:19:16,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:16,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:19:16,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142003276] [2020-10-26 19:19:16,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:19:16,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:16,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:19:16,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:19:16,634 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand 22 states. [2020-10-26 19:19:16,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:16,793 INFO L93 Difference]: Finished difference Result 102 states and 114 transitions. [2020-10-26 19:19:16,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:19:16,794 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 61 [2020-10-26 19:19:16,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:16,794 INFO L225 Difference]: With dead ends: 102 [2020-10-26 19:19:16,795 INFO L226 Difference]: Without dead ends: 74 [2020-10-26 19:19:16,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:19:16,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-26 19:19:16,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-26 19:19:16,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-26 19:19:16,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2020-10-26 19:19:16,800 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 61 [2020-10-26 19:19:16,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:16,800 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2020-10-26 19:19:16,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:19:16,800 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2020-10-26 19:19:16,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-26 19:19:16,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:16,801 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:16,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:19:16,801 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:16,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:16,802 INFO L82 PathProgramCache]: Analyzing trace with hash -42976372, now seen corresponding path program 19 times [2020-10-26 19:19:16,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:16,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715446791] [2020-10-26 19:19:16,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:16,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:16,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:16,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:16,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:16,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:18,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:21,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:21,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 19:19:21,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:19:21,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-26 19:19:21,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:21,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:19:21,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:21,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:19:21,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:22,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:22,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:22,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:22,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:22,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:22,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:22,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:19:22,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:22,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:22,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:22,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:22,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:22,153 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:22,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715446791] [2020-10-26 19:19:22,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:22,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:19:22,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325349643] [2020-10-26 19:19:22,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:19:22,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:22,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:19:22,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:19:22,158 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand 23 states. [2020-10-26 19:19:22,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:22,414 INFO L93 Difference]: Finished difference Result 104 states and 116 transitions. [2020-10-26 19:19:22,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:19:22,414 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 63 [2020-10-26 19:19:22,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:22,415 INFO L225 Difference]: With dead ends: 104 [2020-10-26 19:19:22,415 INFO L226 Difference]: Without dead ends: 76 [2020-10-26 19:19:22,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:19:22,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-26 19:19:22,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-26 19:19:22,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-26 19:19:22,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2020-10-26 19:19:22,421 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 63 [2020-10-26 19:19:22,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:22,421 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2020-10-26 19:19:22,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:19:22,421 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2020-10-26 19:19:22,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-26 19:19:22,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:22,422 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:22,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:19:22,422 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:22,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:22,423 INFO L82 PathProgramCache]: Analyzing trace with hash -970790550, now seen corresponding path program 20 times [2020-10-26 19:19:22,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:22,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89302074] [2020-10-26 19:19:22,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:22,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:22,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:22,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:22,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:22,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:22,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:27,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:27,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 19:19:27,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:19:27,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:19:27,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:27,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:19:27,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:27,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:19:27,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:27,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:27,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:27,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:27,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:27,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:27,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:27,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:19:27,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:27,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:27,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:27,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:27,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:27,791 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:27,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89302074] [2020-10-26 19:19:27,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:27,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:19:27,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196093013] [2020-10-26 19:19:27,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:19:27,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:27,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:19:27,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:19:27,794 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand 24 states. [2020-10-26 19:19:28,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:28,039 INFO L93 Difference]: Finished difference Result 106 states and 118 transitions. [2020-10-26 19:19:28,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:19:28,043 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 65 [2020-10-26 19:19:28,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:28,044 INFO L225 Difference]: With dead ends: 106 [2020-10-26 19:19:28,044 INFO L226 Difference]: Without dead ends: 78 [2020-10-26 19:19:28,045 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 19:19:28,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-26 19:19:28,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-26 19:19:28,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-26 19:19:28,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2020-10-26 19:19:28,049 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 65 [2020-10-26 19:19:28,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:28,050 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2020-10-26 19:19:28,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:19:28,050 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2020-10-26 19:19:28,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-26 19:19:28,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:28,050 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:28,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:19:28,051 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:28,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:28,052 INFO L82 PathProgramCache]: Analyzing trace with hash 752981960, now seen corresponding path program 21 times [2020-10-26 19:19:28,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:28,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823706704] [2020-10-26 19:19:28,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:28,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:28,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:28,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:28,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:28,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:28,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:33,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:33,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 19:19:33,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:19:33,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-26 19:19:33,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:33,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:19:33,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:33,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:19:33,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:33,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:33,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:33,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:33,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:33,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:33,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:33,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:19:33,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:33,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:33,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:33,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:33,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:33,466 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:33,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823706704] [2020-10-26 19:19:33,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:33,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:19:33,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044020818] [2020-10-26 19:19:33,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:19:33,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:33,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:19:33,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:19:33,469 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand 25 states. [2020-10-26 19:19:33,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:33,734 INFO L93 Difference]: Finished difference Result 108 states and 120 transitions. [2020-10-26 19:19:33,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:19:33,734 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 67 [2020-10-26 19:19:33,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:33,736 INFO L225 Difference]: With dead ends: 108 [2020-10-26 19:19:33,736 INFO L226 Difference]: Without dead ends: 80 [2020-10-26 19:19:33,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:19:33,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-26 19:19:33,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-26 19:19:33,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-26 19:19:33,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 85 transitions. [2020-10-26 19:19:33,741 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 85 transitions. Word has length 67 [2020-10-26 19:19:33,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:33,742 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 85 transitions. [2020-10-26 19:19:33,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:19:33,742 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 85 transitions. [2020-10-26 19:19:33,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-26 19:19:33,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:33,743 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:33,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:19:33,743 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:33,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:33,743 INFO L82 PathProgramCache]: Analyzing trace with hash -559012186, now seen corresponding path program 22 times [2020-10-26 19:19:33,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:33,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037759521] [2020-10-26 19:19:33,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:33,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:33,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:33,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:33,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:33,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:33,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:38,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:38,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:19:38,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:19:38,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:19:38,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:38,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:19:38,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:38,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:19:38,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:39,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:39,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:39,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:39,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:39,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:39,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:39,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:19:39,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:39,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:39,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:39,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:39,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:39,160 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:39,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037759521] [2020-10-26 19:19:39,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:39,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:19:39,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299151329] [2020-10-26 19:19:39,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:19:39,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:39,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:19:39,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:19:39,162 INFO L87 Difference]: Start difference. First operand 79 states and 85 transitions. Second operand 26 states. [2020-10-26 19:19:39,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:39,371 INFO L93 Difference]: Finished difference Result 110 states and 122 transitions. [2020-10-26 19:19:39,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:19:39,371 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 69 [2020-10-26 19:19:39,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:39,372 INFO L225 Difference]: With dead ends: 110 [2020-10-26 19:19:39,372 INFO L226 Difference]: Without dead ends: 82 [2020-10-26 19:19:39,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:19:39,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-26 19:19:39,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-26 19:19:39,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-26 19:19:39,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2020-10-26 19:19:39,378 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 69 [2020-10-26 19:19:39,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:39,378 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2020-10-26 19:19:39,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:19:39,378 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2020-10-26 19:19:39,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-26 19:19:39,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:39,379 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:39,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:19:39,379 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:39,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:39,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1334998532, now seen corresponding path program 23 times [2020-10-26 19:19:39,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:39,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216761336] [2020-10-26 19:19:39,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:39,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:39,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:39,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:39,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:39,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:43,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:43,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:44,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:44,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 19:19:44,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:19:44,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:19:44,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:44,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:19:44,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:44,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:19:44,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:44,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:44,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:44,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:44,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:44,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:44,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:44,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:19:44,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:44,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:44,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:44,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:44,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:44,819 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:44,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216761336] [2020-10-26 19:19:44,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:44,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:19:44,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713716965] [2020-10-26 19:19:44,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:19:44,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:44,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:19:44,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:19:44,821 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand 27 states. [2020-10-26 19:19:45,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:45,101 INFO L93 Difference]: Finished difference Result 112 states and 124 transitions. [2020-10-26 19:19:45,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:19:45,102 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 71 [2020-10-26 19:19:45,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:45,103 INFO L225 Difference]: With dead ends: 112 [2020-10-26 19:19:45,104 INFO L226 Difference]: Without dead ends: 84 [2020-10-26 19:19:45,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:19:45,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-26 19:19:45,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-10-26 19:19:45,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-26 19:19:45,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2020-10-26 19:19:45,109 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 71 [2020-10-26 19:19:45,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:45,109 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2020-10-26 19:19:45,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:19:45,109 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2020-10-26 19:19:45,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-26 19:19:45,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:45,110 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:45,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:19:45,110 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:45,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:45,110 INFO L82 PathProgramCache]: Analyzing trace with hash 413165026, now seen corresponding path program 24 times [2020-10-26 19:19:45,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:45,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403172100] [2020-10-26 19:19:45,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:45,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:45,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:45,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:45,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:45,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:50,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:50,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:50,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 19:19:50,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:19:50,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-26 19:19:50,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:50,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:19:50,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:50,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:19:50,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:50,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:50,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:50,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:50,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:50,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:50,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:50,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:19:50,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:50,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:50,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:50,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:50,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:50,578 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:50,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403172100] [2020-10-26 19:19:50,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:50,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:19:50,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367074572] [2020-10-26 19:19:50,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:19:50,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:50,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:19:50,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:19:50,580 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand 28 states. [2020-10-26 19:19:50,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:50,819 INFO L93 Difference]: Finished difference Result 114 states and 126 transitions. [2020-10-26 19:19:50,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:19:50,820 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 73 [2020-10-26 19:19:50,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:50,821 INFO L225 Difference]: With dead ends: 114 [2020-10-26 19:19:50,821 INFO L226 Difference]: Without dead ends: 86 [2020-10-26 19:19:50,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:19:50,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-26 19:19:50,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-26 19:19:50,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-26 19:19:50,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2020-10-26 19:19:50,827 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 73 [2020-10-26 19:19:50,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:50,827 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2020-10-26 19:19:50,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:19:50,828 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2020-10-26 19:19:50,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-26 19:19:50,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:50,832 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:50,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:19:50,832 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:50,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:50,836 INFO L82 PathProgramCache]: Analyzing trace with hash -705571264, now seen corresponding path program 25 times [2020-10-26 19:19:50,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:50,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434348290] [2020-10-26 19:19:50,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:50,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:50,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:50,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:50,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:51,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:55,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:55,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-26 19:19:55,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:19:55,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:19:55,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:55,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:19:55,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:55,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:19:55,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:56,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:56,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:56,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:56,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:56,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:56,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:56,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:19:56,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:56,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:56,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:56,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:56,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:56,356 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:56,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434348290] [2020-10-26 19:19:56,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:56,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:19:56,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657259739] [2020-10-26 19:19:56,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:19:56,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:56,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:19:56,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:19:56,358 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand 29 states. [2020-10-26 19:19:56,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:56,617 INFO L93 Difference]: Finished difference Result 116 states and 128 transitions. [2020-10-26 19:19:56,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:19:56,618 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 75 [2020-10-26 19:19:56,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:56,619 INFO L225 Difference]: With dead ends: 116 [2020-10-26 19:19:56,619 INFO L226 Difference]: Without dead ends: 88 [2020-10-26 19:19:56,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:19:56,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-26 19:19:56,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-10-26 19:19:56,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-26 19:19:56,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2020-10-26 19:19:56,625 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 75 [2020-10-26 19:19:56,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:56,626 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2020-10-26 19:19:56,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:19:56,626 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2020-10-26 19:19:56,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-26 19:19:56,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:56,627 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:56,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:19:56,627 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:56,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:56,627 INFO L82 PathProgramCache]: Analyzing trace with hash -2069321954, now seen corresponding path program 26 times [2020-10-26 19:19:56,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:56,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2143112841] [2020-10-26 19:19:56,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:56,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:56,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:56,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:56,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:56,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:01,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:01,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-26 19:20:01,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:20:01,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:20:01,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:01,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:20:01,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:01,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:20:01,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:02,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:20:02,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:02,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:02,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:02,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:20:02,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:20:02,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:20:02,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:02,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:20:02,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:20:02,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:20:02,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:02,176 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:20:02,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2143112841] [2020-10-26 19:20:02,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:20:02,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:20:02,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110386888] [2020-10-26 19:20:02,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:20:02,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:20:02,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:20:02,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:20:02,181 INFO L87 Difference]: Start difference. First operand 87 states and 93 transitions. Second operand 30 states. [2020-10-26 19:20:02,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:02,333 INFO L93 Difference]: Finished difference Result 118 states and 130 transitions. [2020-10-26 19:20:02,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:20:02,334 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 77 [2020-10-26 19:20:02,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:02,334 INFO L225 Difference]: With dead ends: 118 [2020-10-26 19:20:02,335 INFO L226 Difference]: Without dead ends: 90 [2020-10-26 19:20:02,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:20:02,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-26 19:20:02,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-26 19:20:02,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-26 19:20:02,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2020-10-26 19:20:02,342 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 77 [2020-10-26 19:20:02,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:02,342 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2020-10-26 19:20:02,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:20:02,342 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2020-10-26 19:20:02,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-26 19:20:02,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:02,343 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:02,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:20:02,344 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:02,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:02,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1626257532, now seen corresponding path program 27 times [2020-10-26 19:20:02,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:02,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688918315] [2020-10-26 19:20:02,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:02,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:02,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:02,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:02,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:02,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:07,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:07,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-26 19:20:07,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:20:07,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-26 19:20:07,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:07,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:20:07,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:07,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:20:07,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:07,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:20:07,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:07,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:07,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:07,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:20:07,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:20:07,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:20:07,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:07,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:20:07,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:20:07,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:20:07,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:07,955 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:20:07,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688918315] [2020-10-26 19:20:07,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:20:07,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:20:07,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595419365] [2020-10-26 19:20:07,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:20:07,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:20:07,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:20:07,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:20:07,957 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand 31 states. [2020-10-26 19:20:08,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:08,205 INFO L93 Difference]: Finished difference Result 120 states and 132 transitions. [2020-10-26 19:20:08,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:20:08,206 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 79 [2020-10-26 19:20:08,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:08,207 INFO L225 Difference]: With dead ends: 120 [2020-10-26 19:20:08,207 INFO L226 Difference]: Without dead ends: 92 [2020-10-26 19:20:08,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:20:08,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-26 19:20:08,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-10-26 19:20:08,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-26 19:20:08,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 97 transitions. [2020-10-26 19:20:08,214 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 97 transitions. Word has length 79 [2020-10-26 19:20:08,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:08,214 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 97 transitions. [2020-10-26 19:20:08,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:20:08,214 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 97 transitions. [2020-10-26 19:20:08,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-26 19:20:08,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:08,215 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:08,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:20:08,215 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:08,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:08,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1140189786, now seen corresponding path program 28 times [2020-10-26 19:20:08,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:08,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654807333] [2020-10-26 19:20:08,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:08,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:08,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:08,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:08,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:12,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:12,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:13,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:13,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:13,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 19:20:13,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:20:13,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-26 19:20:13,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:13,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:20:13,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:13,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:20:13,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:13,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:20:13,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:13,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:13,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:13,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:20:13,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:20:13,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:20:13,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:13,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:20:13,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:20:13,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:20:13,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:13,857 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:20:13,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654807333] [2020-10-26 19:20:13,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:20:13,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:20:13,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535626808] [2020-10-26 19:20:13,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:20:13,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:20:13,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:20:13,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:20:13,859 INFO L87 Difference]: Start difference. First operand 91 states and 97 transitions. Second operand 32 states. [2020-10-26 19:20:14,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:14,177 INFO L93 Difference]: Finished difference Result 122 states and 134 transitions. [2020-10-26 19:20:14,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:20:14,178 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 81 [2020-10-26 19:20:14,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:14,179 INFO L225 Difference]: With dead ends: 122 [2020-10-26 19:20:14,179 INFO L226 Difference]: Without dead ends: 94 [2020-10-26 19:20:14,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:20:14,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-26 19:20:14,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-26 19:20:14,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-26 19:20:14,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99 transitions. [2020-10-26 19:20:14,186 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 99 transitions. Word has length 81 [2020-10-26 19:20:14,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:14,186 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 99 transitions. [2020-10-26 19:20:14,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:20:14,186 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 99 transitions. [2020-10-26 19:20:14,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-26 19:20:14,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:14,190 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:14,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:20:14,190 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:14,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:14,191 INFO L82 PathProgramCache]: Analyzing trace with hash -2114446152, now seen corresponding path program 29 times [2020-10-26 19:20:14,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:14,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446287796] [2020-10-26 19:20:14,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:14,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:14,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:14,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:14,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:19,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:19,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:19,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-26 19:20:19,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:20:19,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-26 19:20:19,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:19,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:20:19,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:19,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:20:19,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:19,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:20:19,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:19,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:19,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:19,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:20:19,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:20:19,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:20:19,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:19,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:20:19,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:20:19,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:20:19,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:19,884 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:20:19,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446287796] [2020-10-26 19:20:19,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:20:19,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:20:19,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114885997] [2020-10-26 19:20:19,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:20:19,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:20:19,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:20:19,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:20:19,887 INFO L87 Difference]: Start difference. First operand 93 states and 99 transitions. Second operand 33 states. [2020-10-26 19:20:20,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:20,086 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2020-10-26 19:20:20,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:20:20,087 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 83 [2020-10-26 19:20:20,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:20,089 INFO L225 Difference]: With dead ends: 124 [2020-10-26 19:20:20,089 INFO L226 Difference]: Without dead ends: 96 [2020-10-26 19:20:20,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:20:20,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-26 19:20:20,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-26 19:20:20,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-26 19:20:20,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 101 transitions. [2020-10-26 19:20:20,098 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 101 transitions. Word has length 83 [2020-10-26 19:20:20,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:20,099 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 101 transitions. [2020-10-26 19:20:20,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:20:20,099 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 101 transitions. [2020-10-26 19:20:20,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-26 19:20:20,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:20,100 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:20,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:20:20,102 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:20,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:20,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1211576214, now seen corresponding path program 30 times [2020-10-26 19:20:20,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:20,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575381904] [2020-10-26 19:20:20,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:20,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:20,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:20,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:20,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:25,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:25,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-26 19:20:25,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:20:25,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-26 19:20:25,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:25,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:20:25,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:25,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 19:20:25,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:25,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:20:25,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:25,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:25,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:25,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:20:25,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:20:25,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:20:25,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:25,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:20:25,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:20:25,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:20:25,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:25,828 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:20:25,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575381904] [2020-10-26 19:20:25,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:20:25,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:20:25,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292856541] [2020-10-26 19:20:25,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:20:25,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:20:25,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:20:25,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:20:25,831 INFO L87 Difference]: Start difference. First operand 95 states and 101 transitions. Second operand 34 states. [2020-10-26 19:20:26,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:26,176 INFO L93 Difference]: Finished difference Result 126 states and 138 transitions. [2020-10-26 19:20:26,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:20:26,177 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 85 [2020-10-26 19:20:26,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:26,178 INFO L225 Difference]: With dead ends: 126 [2020-10-26 19:20:26,178 INFO L226 Difference]: Without dead ends: 98 [2020-10-26 19:20:26,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:20:26,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-26 19:20:26,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-26 19:20:26,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-26 19:20:26,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 103 transitions. [2020-10-26 19:20:26,185 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 103 transitions. Word has length 85 [2020-10-26 19:20:26,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:26,185 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 103 transitions. [2020-10-26 19:20:26,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:20:26,186 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 103 transitions. [2020-10-26 19:20:26,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-26 19:20:26,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:26,186 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:26,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:20:26,187 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:26,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:26,187 INFO L82 PathProgramCache]: Analyzing trace with hash 2063401716, now seen corresponding path program 31 times [2020-10-26 19:20:26,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:26,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907044699] [2020-10-26 19:20:26,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:26,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:26,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:26,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:26,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:31,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:31,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-26 19:20:31,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:20:31,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-26 19:20:31,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:31,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:20:31,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:31,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-26 19:20:31,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:31,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:20:31,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:31,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:31,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:31,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:20:31,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:20:31,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:20:31,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:31,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:20:31,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:20:31,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:20:31,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:31,928 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:20:31,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907044699] [2020-10-26 19:20:31,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:20:31,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:20:31,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793013782] [2020-10-26 19:20:31,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:20:31,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:20:31,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:20:31,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:20:31,930 INFO L87 Difference]: Start difference. First operand 97 states and 103 transitions. Second operand 35 states. [2020-10-26 19:20:32,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:32,201 INFO L93 Difference]: Finished difference Result 128 states and 140 transitions. [2020-10-26 19:20:32,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:20:32,201 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 87 [2020-10-26 19:20:32,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:32,202 INFO L225 Difference]: With dead ends: 128 [2020-10-26 19:20:32,202 INFO L226 Difference]: Without dead ends: 100 [2020-10-26 19:20:32,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:20:32,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-26 19:20:32,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-10-26 19:20:32,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-26 19:20:32,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 105 transitions. [2020-10-26 19:20:32,208 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 105 transitions. Word has length 87 [2020-10-26 19:20:32,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:32,209 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 105 transitions. [2020-10-26 19:20:32,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:20:32,209 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 105 transitions. [2020-10-26 19:20:32,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-26 19:20:32,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:32,210 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:32,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:20:32,210 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:32,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:32,211 INFO L82 PathProgramCache]: Analyzing trace with hash 328955602, now seen corresponding path program 32 times [2020-10-26 19:20:32,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:32,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021498980] [2020-10-26 19:20:32,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:32,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:32,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:32,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:32,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:37,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:37,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-26 19:20:37,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:20:37,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-26 19:20:37,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:37,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:20:37,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:37,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-26 19:20:37,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:37,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:20:37,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:37,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:37,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:37,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:20:37,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:20:37,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:20:37,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:37,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:20:37,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:20:37,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:20:37,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:37,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:20:37,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021498980] [2020-10-26 19:20:37,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:20:37,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-26 19:20:37,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753837046] [2020-10-26 19:20:37,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 19:20:37,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:20:37,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 19:20:37,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:20:37,996 INFO L87 Difference]: Start difference. First operand 99 states and 105 transitions. Second operand 36 states. [2020-10-26 19:20:38,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:38,217 INFO L93 Difference]: Finished difference Result 130 states and 142 transitions. [2020-10-26 19:20:38,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:20:38,218 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 89 [2020-10-26 19:20:38,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:38,219 INFO L225 Difference]: With dead ends: 130 [2020-10-26 19:20:38,219 INFO L226 Difference]: Without dead ends: 102 [2020-10-26 19:20:38,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:20:38,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-26 19:20:38,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-10-26 19:20:38,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-26 19:20:38,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 107 transitions. [2020-10-26 19:20:38,225 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 107 transitions. Word has length 89 [2020-10-26 19:20:38,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:38,226 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 107 transitions. [2020-10-26 19:20:38,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 19:20:38,226 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 107 transitions. [2020-10-26 19:20:38,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-26 19:20:38,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:38,227 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:38,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:20:38,227 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:38,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:38,228 INFO L82 PathProgramCache]: Analyzing trace with hash -26449104, now seen corresponding path program 33 times [2020-10-26 19:20:38,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:38,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043811695] [2020-10-26 19:20:38,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:38,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:38,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:38,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:38,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:43,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:43,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 19:20:43,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:20:43,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-26 19:20:43,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:43,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:20:43,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:43,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-26 19:20:43,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:44,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:20:44,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:44,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:44,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:44,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:20:44,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:20:44,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:20:44,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:44,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:20:44,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:20:44,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:20:44,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:44,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:20:44,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043811695] [2020-10-26 19:20:44,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:20:44,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:20:44,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715158075] [2020-10-26 19:20:44,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:20:44,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:20:44,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:20:44,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:20:44,097 INFO L87 Difference]: Start difference. First operand 101 states and 107 transitions. Second operand 37 states. [2020-10-26 19:20:44,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:44,467 INFO L93 Difference]: Finished difference Result 132 states and 144 transitions. [2020-10-26 19:20:44,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:20:44,468 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 91 [2020-10-26 19:20:44,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:44,469 INFO L225 Difference]: With dead ends: 132 [2020-10-26 19:20:44,469 INFO L226 Difference]: Without dead ends: 104 [2020-10-26 19:20:44,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:20:44,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-26 19:20:44,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-10-26 19:20:44,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-26 19:20:44,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 109 transitions. [2020-10-26 19:20:44,475 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 109 transitions. Word has length 91 [2020-10-26 19:20:44,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:44,476 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 109 transitions. [2020-10-26 19:20:44,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:20:44,476 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 109 transitions. [2020-10-26 19:20:44,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-26 19:20:44,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:44,478 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:44,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:20:44,478 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:44,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:44,478 INFO L82 PathProgramCache]: Analyzing trace with hash 2027012110, now seen corresponding path program 34 times [2020-10-26 19:20:44,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:44,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409660799] [2020-10-26 19:20:44,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:44,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:44,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:44,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:44,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:49,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:49,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-26 19:20:49,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:20:49,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:20:49,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:49,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:20:49,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:49,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 19:20:49,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:50,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:20:50,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:50,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:50,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:50,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:20:50,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:20:50,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:20:50,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:50,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:20:50,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:20:50,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:20:50,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:50,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:20:50,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409660799] [2020-10-26 19:20:50,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:20:50,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-26 19:20:50,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224056896] [2020-10-26 19:20:50,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-26 19:20:50,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:20:50,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-26 19:20:50,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:20:50,388 INFO L87 Difference]: Start difference. First operand 103 states and 109 transitions. Second operand 38 states. [2020-10-26 19:20:50,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:50,725 INFO L93 Difference]: Finished difference Result 134 states and 146 transitions. [2020-10-26 19:20:50,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:20:50,725 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 93 [2020-10-26 19:20:50,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:50,727 INFO L225 Difference]: With dead ends: 134 [2020-10-26 19:20:50,727 INFO L226 Difference]: Without dead ends: 106 [2020-10-26 19:20:50,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:20:50,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-26 19:20:50,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-10-26 19:20:50,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-26 19:20:50,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 111 transitions. [2020-10-26 19:20:50,734 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 111 transitions. Word has length 93 [2020-10-26 19:20:50,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:50,734 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 111 transitions. [2020-10-26 19:20:50,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-26 19:20:50,734 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 111 transitions. [2020-10-26 19:20:50,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-26 19:20:50,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:50,735 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:50,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:20:50,735 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:50,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:50,736 INFO L82 PathProgramCache]: Analyzing trace with hash -281717396, now seen corresponding path program 35 times [2020-10-26 19:20:50,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:50,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104452608] [2020-10-26 19:20:50,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:50,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:50,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:50,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:50,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:55,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:55,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-26 19:20:55,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:20:55,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5073 [2020-10-26 19:20:55,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:55,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:20:55,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:55,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-26 19:20:55,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:56,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:20:56,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:56,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:56,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:56,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:20:56,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:20:56,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:20:56,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:56,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:20:56,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:20:56,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:20:56,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:56,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:20:56,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104452608] [2020-10-26 19:20:56,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:20:56,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:20:56,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088564049] [2020-10-26 19:20:56,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:20:56,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:20:56,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:20:56,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:20:56,663 INFO L87 Difference]: Start difference. First operand 105 states and 111 transitions. Second operand 39 states. [2020-10-26 19:20:56,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:56,908 INFO L93 Difference]: Finished difference Result 136 states and 148 transitions. [2020-10-26 19:20:56,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:20:56,909 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 95 [2020-10-26 19:20:56,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:56,910 INFO L225 Difference]: With dead ends: 136 [2020-10-26 19:20:56,910 INFO L226 Difference]: Without dead ends: 108 [2020-10-26 19:20:56,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:20:56,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-26 19:20:56,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-10-26 19:20:56,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-26 19:20:56,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 113 transitions. [2020-10-26 19:20:56,916 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 113 transitions. Word has length 95 [2020-10-26 19:20:56,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:56,917 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 113 transitions. [2020-10-26 19:20:56,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:20:56,917 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 113 transitions. [2020-10-26 19:20:56,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-26 19:20:56,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:56,918 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:56,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:20:56,918 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:56,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:56,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1527319370, now seen corresponding path program 36 times [2020-10-26 19:20:56,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:56,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133010682] [2020-10-26 19:20:56,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:56,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:56,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:56,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:57,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:02,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:02,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-26 19:21:02,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:21:02,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5067 [2020-10-26 19:21:02,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:02,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-26 19:21:02,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:02,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 19:21:02,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:02,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:02,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:02,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:02,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:02,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:02,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:02,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:21:02,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:02,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:02,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:02,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:02,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:02,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:21:02,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133010682] [2020-10-26 19:21:02,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:02,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-26 19:21:02,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830739386] [2020-10-26 19:21:02,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-26 19:21:02,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:02,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-26 19:21:02,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:21:02,884 INFO L87 Difference]: Start difference. First operand 107 states and 113 transitions. Second operand 40 states. [2020-10-26 19:21:03,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:03,185 INFO L93 Difference]: Finished difference Result 138 states and 150 transitions. [2020-10-26 19:21:03,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:21:03,186 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 97 [2020-10-26 19:21:03,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:03,187 INFO L225 Difference]: With dead ends: 138 [2020-10-26 19:21:03,187 INFO L226 Difference]: Without dead ends: 110 [2020-10-26 19:21:03,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:21:03,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-26 19:21:03,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-10-26 19:21:03,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-26 19:21:03,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 115 transitions. [2020-10-26 19:21:03,193 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 115 transitions. Word has length 97 [2020-10-26 19:21:03,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:03,193 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 115 transitions. [2020-10-26 19:21:03,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-26 19:21:03,193 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 115 transitions. [2020-10-26 19:21:03,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-26 19:21:03,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:03,194 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:03,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-26 19:21:03,194 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:03,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:03,194 INFO L82 PathProgramCache]: Analyzing trace with hash 549896616, now seen corresponding path program 37 times [2020-10-26 19:21:03,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:03,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593124872] [2020-10-26 19:21:03,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:03,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:03,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:03,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:03,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:08,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:08,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-26 19:21:08,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:21:08,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-26 19:21:08,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:08,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-26 19:21:08,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:08,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 19:21:08,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:09,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:09,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:09,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:09,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:09,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:09,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:09,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:21:09,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:09,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:09,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:09,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:09,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:09,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:21:09,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593124872] [2020-10-26 19:21:09,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:09,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-26 19:21:09,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061333478] [2020-10-26 19:21:09,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-26 19:21:09,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:09,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-26 19:21:09,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:21:09,175 INFO L87 Difference]: Start difference. First operand 109 states and 115 transitions. Second operand 41 states. [2020-10-26 19:21:09,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:09,562 INFO L93 Difference]: Finished difference Result 140 states and 152 transitions. [2020-10-26 19:21:09,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-26 19:21:09,562 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 99 [2020-10-26 19:21:09,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:09,564 INFO L225 Difference]: With dead ends: 140 [2020-10-26 19:21:09,564 INFO L226 Difference]: Without dead ends: 112 [2020-10-26 19:21:09,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:21:09,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-26 19:21:09,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-10-26 19:21:09,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-26 19:21:09,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 117 transitions. [2020-10-26 19:21:09,570 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 117 transitions. Word has length 99 [2020-10-26 19:21:09,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:09,570 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 117 transitions. [2020-10-26 19:21:09,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-26 19:21:09,570 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 117 transitions. [2020-10-26 19:21:09,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-26 19:21:09,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:09,571 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:09,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-26 19:21:09,572 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:09,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:09,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1844467846, now seen corresponding path program 38 times [2020-10-26 19:21:09,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:09,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1754216727] [2020-10-26 19:21:09,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:09,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:09,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:09,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:09,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:10,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:10,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:10,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:14,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:14,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-26 19:21:14,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:21:14,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-26 19:21:14,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:14,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-26 19:21:14,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:14,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 19:21:14,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:15,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:15,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:15,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:15,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:15,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:15,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:15,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:21:15,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:15,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:15,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:15,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:15,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:21:15,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:21:15,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1754216727] [2020-10-26 19:21:15,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:15,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-26 19:21:15,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460401805] [2020-10-26 19:21:15,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-26 19:21:15,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:15,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-26 19:21:15,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:21:15,602 INFO L87 Difference]: Start difference. First operand 111 states and 117 transitions. Second operand 42 states. [2020-10-26 19:21:15,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:15,822 INFO L93 Difference]: Finished difference Result 142 states and 154 transitions. [2020-10-26 19:21:15,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-26 19:21:15,823 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 101 [2020-10-26 19:21:15,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:15,824 INFO L225 Difference]: With dead ends: 142 [2020-10-26 19:21:15,824 INFO L226 Difference]: Without dead ends: 114 [2020-10-26 19:21:15,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:21:15,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-26 19:21:15,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-10-26 19:21:15,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-26 19:21:15,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 119 transitions. [2020-10-26 19:21:15,830 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 119 transitions. Word has length 101 [2020-10-26 19:21:15,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:15,830 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 119 transitions. [2020-10-26 19:21:15,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-26 19:21:15,830 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 119 transitions. [2020-10-26 19:21:15,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-26 19:21:15,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:15,831 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:15,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-26 19:21:15,831 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:15,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:15,832 INFO L82 PathProgramCache]: Analyzing trace with hash 386904036, now seen corresponding path program 39 times [2020-10-26 19:21:15,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:15,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2074969597] [2020-10-26 19:21:15,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:15,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:15,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:15,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:16,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:16,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:16,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:16,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:20,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:20,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-26 19:21:20,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:21:20,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5068 [2020-10-26 19:21:20,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:20,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-26 19:21:20,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:20,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 19:21:20,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:21,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:21,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:21,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:21,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:21,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:21,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:21,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:21:21,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:21,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:21,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:21,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:21,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:21,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:21:21,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2074969597] [2020-10-26 19:21:21,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:21,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-26 19:21:21,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671161254] [2020-10-26 19:21:21,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-26 19:21:21,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:21,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-26 19:21:21,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:21:21,970 INFO L87 Difference]: Start difference. First operand 113 states and 119 transitions. Second operand 43 states. [2020-10-26 19:21:22,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:22,351 INFO L93 Difference]: Finished difference Result 144 states and 156 transitions. [2020-10-26 19:21:22,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-26 19:21:22,352 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 103 [2020-10-26 19:21:22,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:22,353 INFO L225 Difference]: With dead ends: 144 [2020-10-26 19:21:22,353 INFO L226 Difference]: Without dead ends: 116 [2020-10-26 19:21:22,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:21:22,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-26 19:21:22,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-10-26 19:21:22,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-26 19:21:22,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 121 transitions. [2020-10-26 19:21:22,360 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 121 transitions. Word has length 103 [2020-10-26 19:21:22,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:22,360 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 121 transitions. [2020-10-26 19:21:22,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-26 19:21:22,360 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 121 transitions. [2020-10-26 19:21:22,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-26 19:21:22,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:22,361 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:22,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-26 19:21:22,361 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:22,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:22,362 INFO L82 PathProgramCache]: Analyzing trace with hash -172578878, now seen corresponding path program 40 times [2020-10-26 19:21:22,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:22,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609893619] [2020-10-26 19:21:22,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:22,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:22,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:22,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:22,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:23,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:23,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:23,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:27,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:27,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-26 19:21:27,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:21:27,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 19:21:27,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:27,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-26 19:21:27,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:27,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-26 19:21:27,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:28,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:28,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:28,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:28,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:28,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:28,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:28,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:21:28,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:28,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:28,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:28,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:28,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:28,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:21:28,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609893619] [2020-10-26 19:21:28,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:28,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-26 19:21:28,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969426482] [2020-10-26 19:21:28,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-26 19:21:28,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:28,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-26 19:21:28,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:21:28,508 INFO L87 Difference]: Start difference. First operand 115 states and 121 transitions. Second operand 44 states. [2020-10-26 19:21:28,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:28,826 INFO L93 Difference]: Finished difference Result 146 states and 158 transitions. [2020-10-26 19:21:28,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-26 19:21:28,827 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 105 [2020-10-26 19:21:28,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:28,828 INFO L225 Difference]: With dead ends: 146 [2020-10-26 19:21:28,828 INFO L226 Difference]: Without dead ends: 118 [2020-10-26 19:21:28,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:21:28,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-26 19:21:28,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-10-26 19:21:28,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-26 19:21:28,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 123 transitions. [2020-10-26 19:21:28,834 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 123 transitions. Word has length 105 [2020-10-26 19:21:28,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:28,835 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 123 transitions. [2020-10-26 19:21:28,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-26 19:21:28,835 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 123 transitions. [2020-10-26 19:21:28,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-26 19:21:28,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:28,836 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:28,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-26 19:21:28,836 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:28,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:28,837 INFO L82 PathProgramCache]: Analyzing trace with hash -964747232, now seen corresponding path program 41 times [2020-10-26 19:21:28,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:28,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59996144] [2020-10-26 19:21:28,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:28,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:28,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:28,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:29,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:29,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:29,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:30,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:33,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:33,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 19:21:33,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:21:33,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-26 19:21:33,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:33,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-26 19:21:33,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:33,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-26 19:21:33,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:35,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:35,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:35,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:35,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:35,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:35,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:35,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:21:35,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:35,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:35,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:35,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:35,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:35,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:21:35,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59996144] [2020-10-26 19:21:35,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:35,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-26 19:21:35,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960286281] [2020-10-26 19:21:35,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-26 19:21:35,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:35,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-26 19:21:35,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:21:35,086 INFO L87 Difference]: Start difference. First operand 117 states and 123 transitions. Second operand 45 states. [2020-10-26 19:21:35,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:35,345 INFO L93 Difference]: Finished difference Result 148 states and 160 transitions. [2020-10-26 19:21:35,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-26 19:21:35,346 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 107 [2020-10-26 19:21:35,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:35,348 INFO L225 Difference]: With dead ends: 148 [2020-10-26 19:21:35,348 INFO L226 Difference]: Without dead ends: 120 [2020-10-26 19:21:35,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:21:35,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-26 19:21:35,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-10-26 19:21:35,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-26 19:21:35,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 125 transitions. [2020-10-26 19:21:35,355 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 125 transitions. Word has length 107 [2020-10-26 19:21:35,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:35,356 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 125 transitions. [2020-10-26 19:21:35,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-26 19:21:35,356 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 125 transitions. [2020-10-26 19:21:35,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-26 19:21:35,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:35,357 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:35,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-26 19:21:35,357 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:35,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:35,357 INFO L82 PathProgramCache]: Analyzing trace with hash -2029324034, now seen corresponding path program 42 times [2020-10-26 19:21:35,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:35,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799208401] [2020-10-26 19:21:35,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:35,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:35,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:35,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:35,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:36,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:36,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:36,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking...