/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/psyco/psyco_abp_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 22:25:27,293 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 22:25:27,296 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 22:25:27,333 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 22:25:27,334 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 22:25:27,335 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 22:25:27,337 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 22:25:27,339 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 22:25:27,342 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 22:25:27,343 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 22:25:27,345 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 22:25:27,346 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 22:25:27,347 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 22:25:27,348 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 22:25:27,350 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 22:25:27,351 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 22:25:27,352 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 22:25:27,354 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 22:25:27,356 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 22:25:27,358 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 22:25:27,360 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 22:25:27,362 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 22:25:27,364 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 22:25:27,365 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 22:25:27,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 22:25:27,372 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 22:25:27,372 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 22:25:27,377 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 22:25:27,378 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 22:25:27,383 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 22:25:27,383 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 22:25:27,385 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 22:25:27,387 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 22:25:27,388 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 22:25:27,390 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 22:25:27,390 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 22:25:27,391 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 22:25:27,391 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 22:25:27,392 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 22:25:27,393 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 22:25:27,394 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 22:25:27,395 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 22:25:27,466 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 22:25:27,467 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 22:25:27,472 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 22:25:27,473 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 22:25:27,473 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 22:25:27,473 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 22:25:27,474 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 22:25:27,474 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 22:25:27,474 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 22:25:27,474 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 22:25:27,476 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 22:25:27,476 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 22:25:27,476 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 22:25:27,476 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 22:25:27,477 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 22:25:27,477 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 22:25:27,477 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 22:25:27,477 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 22:25:27,478 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 22:25:27,478 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 22:25:27,479 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 22:25:27,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 22:25:27,479 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 22:25:27,480 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 22:25:27,480 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 22:25:27,480 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 22:25:27,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 22:25:27,481 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 22:25:27,481 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 22:25:27,481 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 22:25:27,902 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 22:25:27,927 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 22:25:27,931 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 22:25:27,932 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 22:25:27,933 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 22:25:27,934 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/psyco/psyco_abp_1-1.c [2020-10-27 22:25:28,027 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1be6aff43/149c2a2592fe4a808a7148cb3e7e98e3/FLAGd3417e5b9 [2020-10-27 22:25:28,618 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 22:25:28,619 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/psyco/psyco_abp_1-1.c [2020-10-27 22:25:28,633 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1be6aff43/149c2a2592fe4a808a7148cb3e7e98e3/FLAGd3417e5b9 [2020-10-27 22:25:28,945 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1be6aff43/149c2a2592fe4a808a7148cb3e7e98e3 [2020-10-27 22:25:28,949 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 22:25:28,958 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 22:25:28,962 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 22:25:28,962 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 22:25:28,967 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 22:25:28,968 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 10:25:28" (1/1) ... [2020-10-27 22:25:28,978 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55ded970 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:25:28, skipping insertion in model container [2020-10-27 22:25:28,979 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 10:25:28" (1/1) ... [2020-10-27 22:25:28,989 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 22:25:29,059 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 22:25:29,437 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 22:25:29,447 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 22:25:29,580 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 22:25:29,605 INFO L208 MainTranslator]: Completed translation [2020-10-27 22:25:29,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:25:29 WrapperNode [2020-10-27 22:25:29,607 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 22:25:29,609 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 22:25:29,609 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 22:25:29,609 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 22:25:29,623 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:25:29" (1/1) ... [2020-10-27 22:25:29,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:25:29" (1/1) ... [2020-10-27 22:25:29,648 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:25:29" (1/1) ... [2020-10-27 22:25:29,649 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:25:29" (1/1) ... [2020-10-27 22:25:29,682 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:25:29" (1/1) ... [2020-10-27 22:25:29,693 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:25:29" (1/1) ... [2020-10-27 22:25:29,699 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:25:29" (1/1) ... [2020-10-27 22:25:29,707 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 22:25:29,708 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 22:25:29,708 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 22:25:29,708 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 22:25:29,709 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:25:29" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 22:25:29,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 22:25:29,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 22:25:29,792 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 22:25:29,793 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 22:25:29,793 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 22:25:29,794 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 22:25:29,794 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 22:25:29,794 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 22:25:29,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 22:25:29,794 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 22:25:29,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 22:25:29,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 22:25:29,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 22:25:29,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 22:25:29,796 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 22:25:29,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 22:25:30,801 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 22:25:30,802 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 22:25:30,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 10:25:30 BoogieIcfgContainer [2020-10-27 22:25:30,804 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 22:25:30,831 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 22:25:30,831 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 22:25:30,835 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 22:25:30,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 10:25:28" (1/3) ... [2020-10-27 22:25:30,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27ff2ab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 10:25:30, skipping insertion in model container [2020-10-27 22:25:30,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:25:29" (2/3) ... [2020-10-27 22:25:30,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27ff2ab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 10:25:30, skipping insertion in model container [2020-10-27 22:25:30,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 10:25:30" (3/3) ... [2020-10-27 22:25:30,838 INFO L111 eAbstractionObserver]: Analyzing ICFG psyco_abp_1-1.c [2020-10-27 22:25:30,850 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 22:25:30,855 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 22:25:30,869 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 22:25:30,897 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 22:25:30,897 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 22:25:30,897 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 22:25:30,898 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 22:25:30,898 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 22:25:30,898 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 22:25:30,898 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 22:25:30,898 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 22:25:30,920 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states. [2020-10-27 22:25:30,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 22:25:30,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:25:30,927 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:25:30,927 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:25:30,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:25:30,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1814028682, now seen corresponding path program 1 times [2020-10-27 22:25:30,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:25:30,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736975664] [2020-10-27 22:25:30,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:25:31,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:25:31,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:31,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:31,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:25:31,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 22:25:31,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:25:31,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 307 [2020-10-27 22:25:31,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:25:31,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:25:31,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 22:25:31,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:25:31,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 22:25:31,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:25:31,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:25:31,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:31,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:25:31,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:25:31,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:25:31,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 22:25:31,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:25:31,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:25:31,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:25:31,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:25:31,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:25:31,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 22:25:31,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736975664] [2020-10-27 22:25:31,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 22:25:31,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 22:25:31,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251999044] [2020-10-27 22:25:31,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 22:25:31,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:25:31,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 22:25:31,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 22:25:31,574 INFO L87 Difference]: Start difference. First operand 119 states. Second operand 3 states. [2020-10-27 22:25:31,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:25:31,679 INFO L93 Difference]: Finished difference Result 229 states and 432 transitions. [2020-10-27 22:25:31,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 22:25:31,681 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-27 22:25:31,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:25:31,691 INFO L225 Difference]: With dead ends: 229 [2020-10-27 22:25:31,691 INFO L226 Difference]: Without dead ends: 111 [2020-10-27 22:25:31,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 22:25:31,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-27 22:25:31,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2020-10-27 22:25:31,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-27 22:25:31,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 182 transitions. [2020-10-27 22:25:31,750 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 182 transitions. Word has length 15 [2020-10-27 22:25:31,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:25:31,751 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 182 transitions. [2020-10-27 22:25:31,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 22:25:31,751 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 182 transitions. [2020-10-27 22:25:31,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 22:25:31,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:25:31,752 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:25:31,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 22:25:31,753 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:25:31,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:25:31,754 INFO L82 PathProgramCache]: Analyzing trace with hash -272448032, now seen corresponding path program 1 times [2020-10-27 22:25:31,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:25:31,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343868048] [2020-10-27 22:25:31,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:25:31,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:25:31,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:31,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:31,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:32,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:25:32,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 22:25:32,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 22:25:32,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 284 [2020-10-27 22:25:32,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:25:32,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 22:25:32,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 22:25:32,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 22:25:32,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 22:25:32,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:25:32,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:25:32,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:32,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:25:32,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:25:32,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:25:32,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 22:25:32,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:25:32,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:25:32,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:25:32,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:25:32,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 22:25:32,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 22:25:32,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343868048] [2020-10-27 22:25:32,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 22:25:32,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 22:25:32,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858110263] [2020-10-27 22:25:32,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 22:25:32,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:25:32,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 22:25:32,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 22:25:32,218 INFO L87 Difference]: Start difference. First operand 111 states and 182 transitions. Second operand 4 states. [2020-10-27 22:25:32,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:25:32,782 INFO L93 Difference]: Finished difference Result 220 states and 364 transitions. [2020-10-27 22:25:32,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 22:25:32,783 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-27 22:25:32,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:25:32,785 INFO L225 Difference]: With dead ends: 220 [2020-10-27 22:25:32,785 INFO L226 Difference]: Without dead ends: 115 [2020-10-27 22:25:32,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 22:25:32,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-27 22:25:32,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2020-10-27 22:25:32,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-27 22:25:32,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 187 transitions. [2020-10-27 22:25:32,802 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 187 transitions. Word has length 16 [2020-10-27 22:25:32,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:25:32,803 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 187 transitions. [2020-10-27 22:25:32,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 22:25:32,803 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 187 transitions. [2020-10-27 22:25:32,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 22:25:32,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:25:32,804 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] [2020-10-27 22:25:32,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 22:25:32,805 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:25:32,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:25:32,806 INFO L82 PathProgramCache]: Analyzing trace with hash -651907819, now seen corresponding path program 1 times [2020-10-27 22:25:32,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:25:32,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854145788] [2020-10-27 22:25:32,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:25:32,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:25:32,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:32,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:33,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:25:33,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 22:25:33,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:25:33,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 314 [2020-10-27 22:25:33,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:25:33,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 22:25:33,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 22:25:33,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 22:25:33,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 22:25:33,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:25:33,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:25:33,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:33,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:25:33,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:25:33,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:25:33,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 22:25:33,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:25:33,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:25:33,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:25:33,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:25:33,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:25:33,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 22:25:33,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854145788] [2020-10-27 22:25:33,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 22:25:33,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 22:25:33,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896916065] [2020-10-27 22:25:33,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 22:25:33,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:25:33,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 22:25:33,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 22:25:33,238 INFO L87 Difference]: Start difference. First operand 115 states and 187 transitions. Second operand 4 states. [2020-10-27 22:25:33,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:25:33,843 INFO L93 Difference]: Finished difference Result 329 states and 546 transitions. [2020-10-27 22:25:33,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 22:25:33,843 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-27 22:25:33,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:25:33,847 INFO L225 Difference]: With dead ends: 329 [2020-10-27 22:25:33,847 INFO L226 Difference]: Without dead ends: 213 [2020-10-27 22:25:33,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 22:25:33,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-27 22:25:33,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 190. [2020-10-27 22:25:33,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-27 22:25:33,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 323 transitions. [2020-10-27 22:25:33,869 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 323 transitions. Word has length 22 [2020-10-27 22:25:33,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:25:33,869 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 323 transitions. [2020-10-27 22:25:33,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 22:25:33,869 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 323 transitions. [2020-10-27 22:25:33,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 22:25:33,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:25:33,870 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] [2020-10-27 22:25:33,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 22:25:33,871 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:25:33,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:25:33,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1822595601, now seen corresponding path program 1 times [2020-10-27 22:25:33,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:25:33,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855621796] [2020-10-27 22:25:33,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:25:33,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:25:33,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:33,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:25:33,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 22:25:33,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:25:33,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-27 22:25:33,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:25:33,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 22:25:33,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 22:25:33,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 22:25:33,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:25:34,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:25:34,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:25:34,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:34,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:25:34,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:25:34,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:25:34,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 22:25:34,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:25:34,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:25:34,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:25:34,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:25:34,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:25:34,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 22:25:34,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855621796] [2020-10-27 22:25:34,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 22:25:34,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 22:25:34,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843954704] [2020-10-27 22:25:34,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 22:25:34,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:25:34,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 22:25:34,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 22:25:34,173 INFO L87 Difference]: Start difference. First operand 190 states and 323 transitions. Second operand 4 states. [2020-10-27 22:25:34,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:25:34,832 INFO L93 Difference]: Finished difference Result 291 states and 486 transitions. [2020-10-27 22:25:34,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 22:25:34,833 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-27 22:25:34,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:25:34,835 INFO L225 Difference]: With dead ends: 291 [2020-10-27 22:25:34,835 INFO L226 Difference]: Without dead ends: 274 [2020-10-27 22:25:34,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 22:25:34,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-27 22:25:34,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 260. [2020-10-27 22:25:34,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-27 22:25:34,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 437 transitions. [2020-10-27 22:25:34,856 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 437 transitions. Word has length 22 [2020-10-27 22:25:34,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:25:34,857 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 437 transitions. [2020-10-27 22:25:34,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 22:25:34,857 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 437 transitions. [2020-10-27 22:25:34,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 22:25:34,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:25:34,858 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] [2020-10-27 22:25:34,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 22:25:34,859 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:25:34,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:25:34,859 INFO L82 PathProgramCache]: Analyzing trace with hash 55202777, now seen corresponding path program 1 times [2020-10-27 22:25:34,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:25:34,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912083712] [2020-10-27 22:25:34,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:25:34,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:25:34,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:34,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:34,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:25:34,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 22:25:34,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:25:34,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-27 22:25:34,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:25:34,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 22:25:34,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 22:25:34,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 22:25:34,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:25:35,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:25:35,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:25:35,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:35,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:25:35,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:25:35,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:25:35,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 22:25:35,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:25:35,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:25:35,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:25:35,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:25:35,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:25:35,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 22:25:35,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912083712] [2020-10-27 22:25:35,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 22:25:35,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 22:25:35,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124183447] [2020-10-27 22:25:35,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 22:25:35,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:25:35,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 22:25:35,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 22:25:35,075 INFO L87 Difference]: Start difference. First operand 260 states and 437 transitions. Second operand 4 states. [2020-10-27 22:25:35,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:25:35,545 INFO L93 Difference]: Finished difference Result 469 states and 793 transitions. [2020-10-27 22:25:35,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 22:25:35,545 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-27 22:25:35,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:25:35,547 INFO L225 Difference]: With dead ends: 469 [2020-10-27 22:25:35,547 INFO L226 Difference]: Without dead ends: 216 [2020-10-27 22:25:35,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 22:25:35,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-27 22:25:35,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 215. [2020-10-27 22:25:35,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-10-27 22:25:35,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 356 transitions. [2020-10-27 22:25:35,582 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 356 transitions. Word has length 23 [2020-10-27 22:25:35,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:25:35,583 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 356 transitions. [2020-10-27 22:25:35,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 22:25:35,583 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 356 transitions. [2020-10-27 22:25:35,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 22:25:35,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:25:35,585 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:25:35,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 22:25:35,585 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:25:35,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:25:35,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1113693870, now seen corresponding path program 1 times [2020-10-27 22:25:35,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:25:35,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192718509] [2020-10-27 22:25:35,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:25:35,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:25:35,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:35,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:35,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:25:35,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 22:25:35,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:25:35,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 377 [2020-10-27 22:25:35,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:25:35,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 22:25:35,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 22:25:35,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 22:25:35,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:25:36,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:25:36,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:25:36,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:36,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:25:36,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:25:36,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:25:36,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 22:25:36,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:25:36,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:25:36,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:25:36,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:25:36,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:25:36,072 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 22:25:36,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192718509] [2020-10-27 22:25:36,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 22:25:36,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 22:25:36,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445712571] [2020-10-27 22:25:36,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 22:25:36,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:25:36,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 22:25:36,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 22:25:36,075 INFO L87 Difference]: Start difference. First operand 215 states and 356 transitions. Second operand 4 states. [2020-10-27 22:25:36,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:25:36,330 INFO L93 Difference]: Finished difference Result 390 states and 648 transitions. [2020-10-27 22:25:36,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 22:25:36,331 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-27 22:25:36,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:25:36,332 INFO L225 Difference]: With dead ends: 390 [2020-10-27 22:25:36,333 INFO L226 Difference]: Without dead ends: 182 [2020-10-27 22:25:36,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 22:25:36,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-27 22:25:36,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2020-10-27 22:25:36,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-27 22:25:36,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 292 transitions. [2020-10-27 22:25:36,354 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 292 transitions. Word has length 29 [2020-10-27 22:25:36,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:25:36,355 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 292 transitions. [2020-10-27 22:25:36,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 22:25:36,355 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 292 transitions. [2020-10-27 22:25:36,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 22:25:36,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:25:36,361 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-27 22:25:36,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 22:25:36,362 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:25:36,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:25:36,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1828841805, now seen corresponding path program 1 times [2020-10-27 22:25:36,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:25:36,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151947065] [2020-10-27 22:25:36,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:25:36,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:25:36,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:36,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:36,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:36,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:25:36,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 22:25:36,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 22:25:36,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 470 [2020-10-27 22:25:36,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:25:36,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 22:25:36,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 22:25:36,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 22:25:36,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:25:36,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:25:36,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:25:36,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:36,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:25:36,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:25:36,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:25:36,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 22:25:36,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:25:36,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:25:36,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:25:36,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:25:36,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:25:36,993 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 22:25:36,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151947065] [2020-10-27 22:25:36,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 22:25:36,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 22:25:36,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075598031] [2020-10-27 22:25:36,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 22:25:36,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:25:36,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 22:25:36,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 22:25:36,997 INFO L87 Difference]: Start difference. First operand 181 states and 292 transitions. Second operand 5 states. [2020-10-27 22:25:37,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:25:37,924 INFO L93 Difference]: Finished difference Result 300 states and 490 transitions. [2020-10-27 22:25:37,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 22:25:37,925 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-10-27 22:25:37,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:25:37,927 INFO L225 Difference]: With dead ends: 300 [2020-10-27 22:25:37,927 INFO L226 Difference]: Without dead ends: 289 [2020-10-27 22:25:37,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-27 22:25:37,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-10-27 22:25:37,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 271. [2020-10-27 22:25:37,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-27 22:25:37,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 443 transitions. [2020-10-27 22:25:37,951 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 443 transitions. Word has length 31 [2020-10-27 22:25:37,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:25:37,953 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 443 transitions. [2020-10-27 22:25:37,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 22:25:37,953 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 443 transitions. [2020-10-27 22:25:37,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 22:25:37,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:25:37,955 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-27 22:25:37,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 22:25:37,955 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:25:37,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:25:37,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1214264895, now seen corresponding path program 1 times [2020-10-27 22:25:37,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:25:37,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317235124] [2020-10-27 22:25:37,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:25:37,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:25:37,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:38,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:25:38,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 22:25:38,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:25:38,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-27 22:25:38,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:25:38,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 22:25:38,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 22:25:38,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 22:25:38,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:25:38,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:25:38,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:25:38,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:38,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:25:38,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:25:38,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:25:38,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 22:25:38,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:25:38,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:25:38,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:25:38,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:25:38,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:25:38,253 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 22:25:38,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317235124] [2020-10-27 22:25:38,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:25:38,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 22:25:38,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038749518] [2020-10-27 22:25:38,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 22:25:38,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:25:38,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 22:25:38,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 22:25:38,260 INFO L87 Difference]: Start difference. First operand 271 states and 443 transitions. Second operand 5 states. [2020-10-27 22:25:39,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:25:39,223 INFO L93 Difference]: Finished difference Result 660 states and 1087 transitions. [2020-10-27 22:25:39,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 22:25:39,224 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2020-10-27 22:25:39,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:25:39,228 INFO L225 Difference]: With dead ends: 660 [2020-10-27 22:25:39,228 INFO L226 Difference]: Without dead ends: 416 [2020-10-27 22:25:39,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 22:25:39,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2020-10-27 22:25:39,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 381. [2020-10-27 22:25:39,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 381 states. [2020-10-27 22:25:39,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 634 transitions. [2020-10-27 22:25:39,254 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 634 transitions. Word has length 32 [2020-10-27 22:25:39,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:25:39,254 INFO L481 AbstractCegarLoop]: Abstraction has 381 states and 634 transitions. [2020-10-27 22:25:39,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 22:25:39,254 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 634 transitions. [2020-10-27 22:25:39,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 22:25:39,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:25:39,255 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-27 22:25:39,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 22:25:39,256 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:25:39,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:25:39,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1915329473, now seen corresponding path program 1 times [2020-10-27 22:25:39,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:25:39,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192950124] [2020-10-27 22:25:39,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:25:39,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:25:39,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:39,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:39,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:25:39,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 22:25:39,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:25:39,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 257 [2020-10-27 22:25:39,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:25:39,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 22:25:39,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 22:25:39,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 22:25:39,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 22:25:39,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:25:39,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:25:39,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:39,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:25:39,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:25:39,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:25:39,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 22:25:39,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:25:39,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:25:39,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:25:39,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:25:39,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 22:25:39,696 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 22:25:39,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192950124] [2020-10-27 22:25:39,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 22:25:39,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 22:25:39,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057333078] [2020-10-27 22:25:39,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 22:25:39,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:25:39,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 22:25:39,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 22:25:39,699 INFO L87 Difference]: Start difference. First operand 381 states and 634 transitions. Second operand 5 states. [2020-10-27 22:25:40,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:25:40,655 INFO L93 Difference]: Finished difference Result 404 states and 661 transitions. [2020-10-27 22:25:40,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 22:25:40,655 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2020-10-27 22:25:40,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:25:40,658 INFO L225 Difference]: With dead ends: 404 [2020-10-27 22:25:40,658 INFO L226 Difference]: Without dead ends: 396 [2020-10-27 22:25:40,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-27 22:25:40,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2020-10-27 22:25:40,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 383. [2020-10-27 22:25:40,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2020-10-27 22:25:40,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 628 transitions. [2020-10-27 22:25:40,677 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 628 transitions. Word has length 32 [2020-10-27 22:25:40,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:25:40,677 INFO L481 AbstractCegarLoop]: Abstraction has 383 states and 628 transitions. [2020-10-27 22:25:40,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 22:25:40,678 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 628 transitions. [2020-10-27 22:25:40,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 22:25:40,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:25:40,679 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-27 22:25:40,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 22:25:40,679 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:25:40,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:25:40,680 INFO L82 PathProgramCache]: Analyzing trace with hash -257354898, now seen corresponding path program 1 times [2020-10-27 22:25:40,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:25:40,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1179499085] [2020-10-27 22:25:40,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:25:40,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:25:40,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:40,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:40,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:25:40,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 22:25:40,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:25:40,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-27 22:25:40,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:25:40,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 22:25:40,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 22:25:40,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 22:25:40,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:25:40,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:25:40,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:25:40,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:40,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:25:40,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:25:40,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:25:40,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 22:25:40,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:25:40,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:25:40,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:25:40,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:25:40,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:25:40,877 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 22:25:40,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1179499085] [2020-10-27 22:25:40,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 22:25:40,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 22:25:40,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246303781] [2020-10-27 22:25:40,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 22:25:40,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:25:40,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 22:25:40,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 22:25:40,880 INFO L87 Difference]: Start difference. First operand 383 states and 628 transitions. Second operand 4 states. [2020-10-27 22:25:41,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:25:41,266 INFO L93 Difference]: Finished difference Result 674 states and 1104 transitions. [2020-10-27 22:25:41,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 22:25:41,266 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-27 22:25:41,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:25:41,271 INFO L225 Difference]: With dead ends: 674 [2020-10-27 22:25:41,271 INFO L226 Difference]: Without dead ends: 321 [2020-10-27 22:25:41,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 22:25:41,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-10-27 22:25:41,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 320. [2020-10-27 22:25:41,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2020-10-27 22:25:41,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 507 transitions. [2020-10-27 22:25:41,290 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 507 transitions. Word has length 33 [2020-10-27 22:25:41,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:25:41,291 INFO L481 AbstractCegarLoop]: Abstraction has 320 states and 507 transitions. [2020-10-27 22:25:41,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 22:25:41,291 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 507 transitions. [2020-10-27 22:25:41,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 22:25:41,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:25:41,293 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:25:41,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 22:25:41,293 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:25:41,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:25:41,294 INFO L82 PathProgramCache]: Analyzing trace with hash -740511781, now seen corresponding path program 1 times [2020-10-27 22:25:41,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:25:41,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46079588] [2020-10-27 22:25:41,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:25:41,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:25:41,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:41,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:41,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:42,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:25:42,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 22:25:42,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 22:25:42,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 696 [2020-10-27 22:25:42,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:25:42,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 22:25:42,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 22:25:42,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 22:25:42,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:25:42,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:25:42,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:25:42,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:42,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:25:42,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:25:42,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:25:42,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 22:25:42,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:25:42,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:25:42,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:25:42,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:25:42,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:25:42,120 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-27 22:25:42,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46079588] [2020-10-27 22:25:42,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 22:25:42,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 22:25:42,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657449112] [2020-10-27 22:25:42,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 22:25:42,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:25:42,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 22:25:42,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 22:25:42,123 INFO L87 Difference]: Start difference. First operand 320 states and 507 transitions. Second operand 4 states. [2020-10-27 22:25:42,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:25:42,393 INFO L93 Difference]: Finished difference Result 551 states and 881 transitions. [2020-10-27 22:25:42,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 22:25:42,393 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-10-27 22:25:42,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:25:42,396 INFO L225 Difference]: With dead ends: 551 [2020-10-27 22:25:42,397 INFO L226 Difference]: Without dead ends: 261 [2020-10-27 22:25:42,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 22:25:42,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-10-27 22:25:42,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 260. [2020-10-27 22:25:42,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-27 22:25:42,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 408 transitions. [2020-10-27 22:25:42,418 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 408 transitions. Word has length 41 [2020-10-27 22:25:42,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:25:42,418 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 408 transitions. [2020-10-27 22:25:42,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 22:25:42,419 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 408 transitions. [2020-10-27 22:25:42,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 22:25:42,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:25:42,419 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:25:42,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 22:25:42,420 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:25:42,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:25:42,420 INFO L82 PathProgramCache]: Analyzing trace with hash -2091531186, now seen corresponding path program 1 times [2020-10-27 22:25:42,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:25:42,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2107512014] [2020-10-27 22:25:42,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:25:42,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:25:42,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:42,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:42,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:25:42,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 22:25:42,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:25:42,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 530 [2020-10-27 22:25:42,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:25:42,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 22:25:42,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 22:25:42,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 22:25:42,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:25:43,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:25:43,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:25:43,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:43,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:25:43,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:25:43,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:25:43,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 22:25:43,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:25:43,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:25:43,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:25:43,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:25:43,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 22:25:43,248 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 22:25:43,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2107512014] [2020-10-27 22:25:43,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 22:25:43,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 22:25:43,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941505959] [2020-10-27 22:25:43,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 22:25:43,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:25:43,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 22:25:43,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 22:25:43,251 INFO L87 Difference]: Start difference. First operand 260 states and 408 transitions. Second operand 5 states. [2020-10-27 22:25:44,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:25:44,243 INFO L93 Difference]: Finished difference Result 615 states and 983 transitions. [2020-10-27 22:25:44,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 22:25:44,244 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-10-27 22:25:44,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:25:44,248 INFO L225 Difference]: With dead ends: 615 [2020-10-27 22:25:44,248 INFO L226 Difference]: Without dead ends: 378 [2020-10-27 22:25:44,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-27 22:25:44,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-10-27 22:25:44,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 361. [2020-10-27 22:25:44,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2020-10-27 22:25:44,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 575 transitions. [2020-10-27 22:25:44,272 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 575 transitions. Word has length 42 [2020-10-27 22:25:44,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:25:44,272 INFO L481 AbstractCegarLoop]: Abstraction has 361 states and 575 transitions. [2020-10-27 22:25:44,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 22:25:44,272 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 575 transitions. [2020-10-27 22:25:44,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 22:25:44,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:25:44,273 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:25:44,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 22:25:44,274 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:25:44,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:25:44,274 INFO L82 PathProgramCache]: Analyzing trace with hash -58121282, now seen corresponding path program 1 times [2020-10-27 22:25:44,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:25:44,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435014605] [2020-10-27 22:25:44,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:25:44,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:25:44,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:44,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:44,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:25:44,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 22:25:44,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:25:44,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 545 [2020-10-27 22:25:44,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:25:44,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 22:25:44,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 22:25:44,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 22:25:44,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:25:45,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:25:45,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:25:45,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:45,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:25:45,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:25:45,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:25:45,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 22:25:45,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:25:45,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:25:45,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:25:45,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:25:45,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:25:45,073 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 22:25:45,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435014605] [2020-10-27 22:25:45,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:25:45,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 22:25:45,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904956720] [2020-10-27 22:25:45,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 22:25:45,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:25:45,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 22:25:45,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 22:25:45,077 INFO L87 Difference]: Start difference. First operand 361 states and 575 transitions. Second operand 6 states. [2020-10-27 22:25:46,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:25:46,298 INFO L93 Difference]: Finished difference Result 869 states and 1406 transitions. [2020-10-27 22:25:46,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 22:25:46,299 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-10-27 22:25:46,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:25:46,305 INFO L225 Difference]: With dead ends: 869 [2020-10-27 22:25:46,305 INFO L226 Difference]: Without dead ends: 523 [2020-10-27 22:25:46,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-27 22:25:46,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2020-10-27 22:25:46,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 496. [2020-10-27 22:25:46,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2020-10-27 22:25:46,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 768 transitions. [2020-10-27 22:25:46,333 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 768 transitions. Word has length 43 [2020-10-27 22:25:46,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:25:46,334 INFO L481 AbstractCegarLoop]: Abstraction has 496 states and 768 transitions. [2020-10-27 22:25:46,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 22:25:46,334 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 768 transitions. [2020-10-27 22:25:46,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 22:25:46,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:25:46,336 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:25:46,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 22:25:46,336 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:25:46,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:25:46,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1446909283, now seen corresponding path program 1 times [2020-10-27 22:25:46,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:25:46,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016515769] [2020-10-27 22:25:46,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:25:46,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:25:46,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:46,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:25:46,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 22:25:46,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:25:46,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 201 [2020-10-27 22:25:46,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:25:46,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 22:25:46,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 22:25:46,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 22:25:46,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:25:46,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:25:46,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:25:46,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:46,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:25:46,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:25:46,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:25:46,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 22:25:46,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:25:46,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:25:46,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:25:46,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:25:46,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 22:25:46,694 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 22:25:46,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016515769] [2020-10-27 22:25:46,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 22:25:46,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 22:25:46,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873664467] [2020-10-27 22:25:46,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 22:25:46,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:25:46,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 22:25:46,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 22:25:46,702 INFO L87 Difference]: Start difference. First operand 496 states and 768 transitions. Second operand 5 states. [2020-10-27 22:25:47,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:25:47,391 INFO L93 Difference]: Finished difference Result 757 states and 1171 transitions. [2020-10-27 22:25:47,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 22:25:47,392 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2020-10-27 22:25:47,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:25:47,396 INFO L225 Difference]: With dead ends: 757 [2020-10-27 22:25:47,397 INFO L226 Difference]: Without dead ends: 748 [2020-10-27 22:25:47,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 22:25:47,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2020-10-27 22:25:47,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 703. [2020-10-27 22:25:47,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 703 states. [2020-10-27 22:25:47,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1089 transitions. [2020-10-27 22:25:47,435 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1089 transitions. Word has length 44 [2020-10-27 22:25:47,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:25:47,435 INFO L481 AbstractCegarLoop]: Abstraction has 703 states and 1089 transitions. [2020-10-27 22:25:47,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 22:25:47,436 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1089 transitions. [2020-10-27 22:25:47,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 22:25:47,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:25:47,436 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:25:47,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 22:25:47,437 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:25:47,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:25:47,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1549649939, now seen corresponding path program 1 times [2020-10-27 22:25:47,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:25:47,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006573788] [2020-10-27 22:25:47,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:25:47,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:25:47,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:47,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:25:47,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 22:25:47,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:25:47,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 222 [2020-10-27 22:25:47,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:25:47,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 22:25:47,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 22:25:47,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 22:25:47,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:25:47,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:25:47,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:25:47,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:47,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:25:47,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:25:47,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:25:47,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 22:25:47,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:25:47,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:25:47,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:25:47,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:25:47,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:25:47,944 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 22:25:47,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006573788] [2020-10-27 22:25:47,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:25:47,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 22:25:47,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175474878] [2020-10-27 22:25:47,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 22:25:47,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:25:47,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 22:25:47,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 22:25:47,946 INFO L87 Difference]: Start difference. First operand 703 states and 1089 transitions. Second operand 6 states. [2020-10-27 22:25:49,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:25:49,053 INFO L93 Difference]: Finished difference Result 710 states and 1097 transitions. [2020-10-27 22:25:49,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 22:25:49,054 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-10-27 22:25:49,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:25:49,059 INFO L225 Difference]: With dead ends: 710 [2020-10-27 22:25:49,059 INFO L226 Difference]: Without dead ends: 707 [2020-10-27 22:25:49,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-27 22:25:49,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2020-10-27 22:25:49,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 704. [2020-10-27 22:25:49,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 704 states. [2020-10-27 22:25:49,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 1090 transitions. [2020-10-27 22:25:49,097 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 1090 transitions. Word has length 45 [2020-10-27 22:25:49,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:25:49,098 INFO L481 AbstractCegarLoop]: Abstraction has 704 states and 1090 transitions. [2020-10-27 22:25:49,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 22:25:49,098 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 1090 transitions. [2020-10-27 22:25:49,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 22:25:49,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:25:49,099 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:25:49,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 22:25:49,100 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:25:49,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:25:49,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1207110944, now seen corresponding path program 1 times [2020-10-27 22:25:49,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:25:49,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999454101] [2020-10-27 22:25:49,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:25:49,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:25:49,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:49,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:49,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:25:49,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 22:25:49,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:25:49,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-10-27 22:25:49,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:25:49,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 22:25:49,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 22:25:49,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 22:25:49,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:25:49,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:25:49,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:25:49,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:49,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:25:49,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:25:49,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:25:49,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 22:25:49,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:25:49,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:25:49,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:25:49,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:25:49,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:25:49,420 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-27 22:25:49,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999454101] [2020-10-27 22:25:49,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 22:25:49,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 22:25:49,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140640421] [2020-10-27 22:25:49,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 22:25:49,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:25:49,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 22:25:49,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 22:25:49,424 INFO L87 Difference]: Start difference. First operand 704 states and 1090 transitions. Second operand 4 states. [2020-10-27 22:25:49,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:25:49,825 INFO L93 Difference]: Finished difference Result 1326 states and 2038 transitions. [2020-10-27 22:25:49,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 22:25:49,826 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2020-10-27 22:25:49,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:25:49,830 INFO L225 Difference]: With dead ends: 1326 [2020-10-27 22:25:49,830 INFO L226 Difference]: Without dead ends: 671 [2020-10-27 22:25:49,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 22:25:49,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2020-10-27 22:25:49,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 670. [2020-10-27 22:25:49,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 670 states. [2020-10-27 22:25:49,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 999 transitions. [2020-10-27 22:25:49,877 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 999 transitions. Word has length 46 [2020-10-27 22:25:49,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:25:49,877 INFO L481 AbstractCegarLoop]: Abstraction has 670 states and 999 transitions. [2020-10-27 22:25:49,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 22:25:49,878 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 999 transitions. [2020-10-27 22:25:49,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 22:25:49,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:25:49,879 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:25:49,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 22:25:49,879 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:25:49,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:25:49,880 INFO L82 PathProgramCache]: Analyzing trace with hash 872163668, now seen corresponding path program 1 times [2020-10-27 22:25:49,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:25:49,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525318219] [2020-10-27 22:25:49,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:25:49,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:25:49,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:49,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:50,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:50,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:50,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:50,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:25:50,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 22:25:50,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 22:25:50,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1074 [2020-10-27 22:25:50,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:25:50,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 22:25:50,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-27 22:25:50,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 22:25:50,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:25:51,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:25:51,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:25:51,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:51,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:25:51,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:25:51,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:25:51,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 22:25:51,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:25:51,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:25:51,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:25:51,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:25:51,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:25:51,150 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-27 22:25:51,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525318219] [2020-10-27 22:25:51,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 22:25:51,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 22:25:51,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060717574] [2020-10-27 22:25:51,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 22:25:51,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:25:51,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 22:25:51,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 22:25:51,157 INFO L87 Difference]: Start difference. First operand 670 states and 999 transitions. Second operand 4 states. [2020-10-27 22:25:51,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:25:51,709 INFO L93 Difference]: Finished difference Result 703 states and 1041 transitions. [2020-10-27 22:25:51,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 22:25:51,712 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-10-27 22:25:51,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:25:51,717 INFO L225 Difference]: With dead ends: 703 [2020-10-27 22:25:51,717 INFO L226 Difference]: Without dead ends: 694 [2020-10-27 22:25:51,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 22:25:51,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2020-10-27 22:25:51,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 687. [2020-10-27 22:25:51,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 687 states. [2020-10-27 22:25:51,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 1020 transitions. [2020-10-27 22:25:51,767 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 1020 transitions. Word has length 56 [2020-10-27 22:25:51,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:25:51,767 INFO L481 AbstractCegarLoop]: Abstraction has 687 states and 1020 transitions. [2020-10-27 22:25:51,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 22:25:51,767 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 1020 transitions. [2020-10-27 22:25:51,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 22:25:51,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:25:51,768 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:25:51,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 22:25:51,769 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:25:51,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:25:51,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1130329106, now seen corresponding path program 1 times [2020-10-27 22:25:51,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:25:51,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499192039] [2020-10-27 22:25:51,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:25:51,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:25:51,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:51,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:52,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:52,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:25:52,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 22:25:52,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 22:25:52,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 629 [2020-10-27 22:25:52,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:25:52,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 22:25:52,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-27 22:25:52,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 22:25:52,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:25:52,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:25:52,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:25:52,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:52,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:25:52,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:25:52,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:25:52,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 22:25:52,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:25:52,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:25:52,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:25:52,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:25:52,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:25:52,534 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-10-27 22:25:52,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499192039] [2020-10-27 22:25:52,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 22:25:52,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 22:25:52,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208456261] [2020-10-27 22:25:52,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 22:25:52,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:25:52,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 22:25:52,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 22:25:52,541 INFO L87 Difference]: Start difference. First operand 687 states and 1020 transitions. Second operand 4 states. [2020-10-27 22:25:52,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:25:52,861 INFO L93 Difference]: Finished difference Result 1008 states and 1494 transitions. [2020-10-27 22:25:52,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 22:25:52,862 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-10-27 22:25:52,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:25:52,865 INFO L225 Difference]: With dead ends: 1008 [2020-10-27 22:25:52,865 INFO L226 Difference]: Without dead ends: 390 [2020-10-27 22:25:52,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 22:25:52,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-10-27 22:25:52,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 389. [2020-10-27 22:25:52,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 389 states. [2020-10-27 22:25:52,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 560 transitions. [2020-10-27 22:25:52,888 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 560 transitions. Word has length 56 [2020-10-27 22:25:52,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:25:52,888 INFO L481 AbstractCegarLoop]: Abstraction has 389 states and 560 transitions. [2020-10-27 22:25:52,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 22:25:52,889 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 560 transitions. [2020-10-27 22:25:52,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 22:25:52,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:25:52,889 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:25:52,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 22:25:52,890 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:25:52,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:25:52,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1177529757, now seen corresponding path program 1 times [2020-10-27 22:25:52,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:25:52,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887835115] [2020-10-27 22:25:52,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:25:52,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:25:52,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:52,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:53,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:25:53,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 22:25:53,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:25:53,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 789 [2020-10-27 22:25:53,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:25:53,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 22:25:53,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 22:25:53,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 22:25:53,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:25:53,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:25:53,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:25:53,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:53,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:25:53,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:25:53,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:25:53,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 22:25:53,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:25:53,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:25:53,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:25:53,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:25:53,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:25:53,977 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 21 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 22:25:53,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887835115] [2020-10-27 22:25:53,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:25:53,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 22:25:53,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999777102] [2020-10-27 22:25:53,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 22:25:53,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:25:53,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 22:25:53,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 22:25:53,981 INFO L87 Difference]: Start difference. First operand 389 states and 560 transitions. Second operand 6 states. [2020-10-27 22:25:55,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:25:55,155 INFO L93 Difference]: Finished difference Result 648 states and 931 transitions. [2020-10-27 22:25:55,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 22:25:55,156 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-27 22:25:55,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:25:55,158 INFO L225 Difference]: With dead ends: 648 [2020-10-27 22:25:55,158 INFO L226 Difference]: Without dead ends: 402 [2020-10-27 22:25:55,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-27 22:25:55,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-10-27 22:25:55,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 390. [2020-10-27 22:25:55,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2020-10-27 22:25:55,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 555 transitions. [2020-10-27 22:25:55,182 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 555 transitions. Word has length 57 [2020-10-27 22:25:55,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:25:55,183 INFO L481 AbstractCegarLoop]: Abstraction has 390 states and 555 transitions. [2020-10-27 22:25:55,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 22:25:55,183 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 555 transitions. [2020-10-27 22:25:55,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 22:25:55,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:25:55,184 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:25:55,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 22:25:55,184 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:25:55,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:25:55,185 INFO L82 PathProgramCache]: Analyzing trace with hash -211541169, now seen corresponding path program 1 times [2020-10-27 22:25:55,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:25:55,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139687073] [2020-10-27 22:25:55,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:25:55,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:25:55,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:55,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:55,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:56,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:25:56,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 22:25:56,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 22:25:56,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1663 [2020-10-27 22:25:56,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:25:56,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 22:25:56,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 22:25:56,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 22:25:56,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:25:57,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:25:57,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:25:57,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:57,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:25:57,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:25:57,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:25:57,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 22:25:57,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:25:57,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:25:57,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:25:57,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:25:57,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:25:57,059 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 22:25:57,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139687073] [2020-10-27 22:25:57,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:25:57,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 22:25:57,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087619753] [2020-10-27 22:25:57,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 22:25:57,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:25:57,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 22:25:57,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-27 22:25:57,061 INFO L87 Difference]: Start difference. First operand 390 states and 555 transitions. Second operand 7 states. [2020-10-27 22:25:57,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:25:57,884 INFO L93 Difference]: Finished difference Result 485 states and 687 transitions. [2020-10-27 22:25:57,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 22:25:57,884 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 60 [2020-10-27 22:25:57,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:25:57,885 INFO L225 Difference]: With dead ends: 485 [2020-10-27 22:25:57,886 INFO L226 Difference]: Without dead ends: 242 [2020-10-27 22:25:57,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-27 22:25:57,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-10-27 22:25:57,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 235. [2020-10-27 22:25:57,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-27 22:25:57,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 326 transitions. [2020-10-27 22:25:57,900 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 326 transitions. Word has length 60 [2020-10-27 22:25:57,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:25:57,901 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 326 transitions. [2020-10-27 22:25:57,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 22:25:57,901 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 326 transitions. [2020-10-27 22:25:57,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 22:25:57,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:25:57,902 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:25:57,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 22:25:57,902 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:25:57,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:25:57,903 INFO L82 PathProgramCache]: Analyzing trace with hash 798796411, now seen corresponding path program 1 times [2020-10-27 22:25:57,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:25:57,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377997931] [2020-10-27 22:25:57,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:25:57,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:25:57,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:58,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:25:58,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 22:25:58,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:25:58,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 313 [2020-10-27 22:25:58,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:25:58,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 22:25:58,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 22:25:58,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 22:25:58,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:25:58,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:25:58,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:25:58,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:58,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:25:58,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:25:58,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:25:58,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 22:25:58,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:25:58,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:25:58,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:25:58,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:25:58,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:25:58,419 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 22:25:58,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377997931] [2020-10-27 22:25:58,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:25:58,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 22:25:58,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777453899] [2020-10-27 22:25:58,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 22:25:58,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:25:58,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 22:25:58,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 22:25:58,421 INFO L87 Difference]: Start difference. First operand 235 states and 326 transitions. Second operand 7 states. [2020-10-27 22:25:59,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:25:59,492 INFO L93 Difference]: Finished difference Result 260 states and 359 transitions. [2020-10-27 22:25:59,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 22:25:59,493 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 61 [2020-10-27 22:25:59,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:25:59,496 INFO L225 Difference]: With dead ends: 260 [2020-10-27 22:25:59,496 INFO L226 Difference]: Without dead ends: 257 [2020-10-27 22:25:59,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-27 22:25:59,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-10-27 22:25:59,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2020-10-27 22:25:59,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-10-27 22:25:59,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 356 transitions. [2020-10-27 22:25:59,514 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 356 transitions. Word has length 61 [2020-10-27 22:25:59,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:25:59,515 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 356 transitions. [2020-10-27 22:25:59,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 22:25:59,515 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 356 transitions. [2020-10-27 22:25:59,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 22:25:59,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:25:59,516 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:25:59,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 22:25:59,516 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:25:59,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:25:59,517 INFO L82 PathProgramCache]: Analyzing trace with hash -134972222, now seen corresponding path program 1 times [2020-10-27 22:25:59,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:25:59,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48402734] [2020-10-27 22:25:59,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:25:59,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:25:59,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:25:59,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:26:00,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:26:00,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 22:26:00,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:26:00,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1019 [2020-10-27 22:26:00,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:26:00,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 22:26:00,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 22:26:00,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 22:26:00,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:26:00,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:26:00,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:26:00,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:26:00,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:26:00,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:26:00,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:26:00,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 22:26:00,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:26:00,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:26:00,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:26:00,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:26:00,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:26:00,880 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 22:26:00,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [48402734] [2020-10-27 22:26:00,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:26:00,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 22:26:00,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600478076] [2020-10-27 22:26:00,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 22:26:00,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:26:00,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 22:26:00,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 22:26:00,884 INFO L87 Difference]: Start difference. First operand 257 states and 356 transitions. Second operand 8 states. [2020-10-27 22:26:02,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:26:02,694 INFO L93 Difference]: Finished difference Result 271 states and 369 transitions. [2020-10-27 22:26:02,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 22:26:02,699 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 68 [2020-10-27 22:26:02,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:26:02,701 INFO L225 Difference]: With dead ends: 271 [2020-10-27 22:26:02,701 INFO L226 Difference]: Without dead ends: 268 [2020-10-27 22:26:02,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-10-27 22:26:02,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-10-27 22:26:02,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 257. [2020-10-27 22:26:02,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-10-27 22:26:02,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 355 transitions. [2020-10-27 22:26:02,718 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 355 transitions. Word has length 68 [2020-10-27 22:26:02,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:26:02,718 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 355 transitions. [2020-10-27 22:26:02,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 22:26:02,718 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 355 transitions. [2020-10-27 22:26:02,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 22:26:02,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:26:02,719 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:26:02,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 22:26:02,719 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:26:02,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:26:02,720 INFO L82 PathProgramCache]: Analyzing trace with hash 2053058480, now seen corresponding path program 1 times [2020-10-27 22:26:02,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:26:02,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688517602] [2020-10-27 22:26:02,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:26:02,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:26:02,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:26:03,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:26:03,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 22:26:03,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:26:03,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 553 [2020-10-27 22:26:03,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:26:03,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 22:26:03,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 22:26:03,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 22:26:03,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:26:03,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:26:03,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:26:03,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:26:03,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:26:03,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:26:03,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:26:03,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 22:26:03,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:26:03,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:26:03,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:26:03,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:26:03,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:26:03,441 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 50 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-27 22:26:03,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688517602] [2020-10-27 22:26:03,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:26:03,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 22:26:03,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658061645] [2020-10-27 22:26:03,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 22:26:03,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:26:03,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 22:26:03,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 22:26:03,446 INFO L87 Difference]: Start difference. First operand 257 states and 355 transitions. Second operand 7 states. [2020-10-27 22:26:04,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:26:04,557 INFO L93 Difference]: Finished difference Result 404 states and 561 transitions. [2020-10-27 22:26:04,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 22:26:04,558 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 78 [2020-10-27 22:26:04,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:26:04,561 INFO L225 Difference]: With dead ends: 404 [2020-10-27 22:26:04,561 INFO L226 Difference]: Without dead ends: 318 [2020-10-27 22:26:04,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-27 22:26:04,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-10-27 22:26:04,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 274. [2020-10-27 22:26:04,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-27 22:26:04,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 379 transitions. [2020-10-27 22:26:04,580 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 379 transitions. Word has length 78 [2020-10-27 22:26:04,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:26:04,580 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 379 transitions. [2020-10-27 22:26:04,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 22:26:04,580 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 379 transitions. [2020-10-27 22:26:04,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-27 22:26:04,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:26:04,581 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:26:04,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 22:26:04,582 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:26:04,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:26:04,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1973035492, now seen corresponding path program 1 times [2020-10-27 22:26:04,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:26:04,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478458305] [2020-10-27 22:26:04,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:26:04,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:26:04,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:26:05,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:26:05,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 22:26:05,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:26:05,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 976 [2020-10-27 22:26:05,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:26:05,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 22:26:05,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 22:26:05,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 22:26:05,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:26:06,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:26:06,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:26:06,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:26:06,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:26:06,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:26:06,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:26:06,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 22:26:06,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:26:06,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:26:06,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:26:06,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:26:06,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:26:06,055 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 22:26:06,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478458305] [2020-10-27 22:26:06,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:26:06,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 22:26:06,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339701949] [2020-10-27 22:26:06,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 22:26:06,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:26:06,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 22:26:06,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 22:26:06,057 INFO L87 Difference]: Start difference. First operand 274 states and 379 transitions. Second operand 10 states. [2020-10-27 22:26:08,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:26:08,006 INFO L93 Difference]: Finished difference Result 317 states and 436 transitions. [2020-10-27 22:26:08,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 22:26:08,007 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 91 [2020-10-27 22:26:08,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:26:08,010 INFO L225 Difference]: With dead ends: 317 [2020-10-27 22:26:08,010 INFO L226 Difference]: Without dead ends: 314 [2020-10-27 22:26:08,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-10-27 22:26:08,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-10-27 22:26:08,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 313. [2020-10-27 22:26:08,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2020-10-27 22:26:08,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 432 transitions. [2020-10-27 22:26:08,033 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 432 transitions. Word has length 91 [2020-10-27 22:26:08,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:26:08,033 INFO L481 AbstractCegarLoop]: Abstraction has 313 states and 432 transitions. [2020-10-27 22:26:08,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 22:26:08,033 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 432 transitions. [2020-10-27 22:26:08,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-27 22:26:08,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:26:08,035 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:26:08,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 22:26:08,035 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:26:08,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:26:08,036 INFO L82 PathProgramCache]: Analyzing trace with hash 629412522, now seen corresponding path program 1 times [2020-10-27 22:26:08,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:26:08,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663403067] [2020-10-27 22:26:08,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:26:08,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:26:08,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:26:09,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:26:09,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-27 22:26:09,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:26:09,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1396 [2020-10-27 22:26:09,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:26:09,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 22:26:09,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 22:26:09,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-27 22:26:09,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:26:09,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:26:09,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:26:09,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:26:09,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:26:09,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:26:09,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:26:09,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 22:26:09,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:26:09,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:26:09,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:26:09,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:26:09,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 22:26:09,915 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 24 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 22:26:09,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663403067] [2020-10-27 22:26:09,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:26:09,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 22:26:09,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073462924] [2020-10-27 22:26:09,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 22:26:09,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:26:09,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 22:26:09,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-27 22:26:09,918 INFO L87 Difference]: Start difference. First operand 313 states and 432 transitions. Second operand 11 states. [2020-10-27 22:26:12,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:26:12,309 INFO L93 Difference]: Finished difference Result 338 states and 465 transitions. [2020-10-27 22:26:12,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 22:26:12,309 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 107 [2020-10-27 22:26:12,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:26:12,312 INFO L225 Difference]: With dead ends: 338 [2020-10-27 22:26:12,312 INFO L226 Difference]: Without dead ends: 335 [2020-10-27 22:26:12,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2020-10-27 22:26:12,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-27 22:26:12,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 335. [2020-10-27 22:26:12,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2020-10-27 22:26:12,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 462 transitions. [2020-10-27 22:26:12,332 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 462 transitions. Word has length 107 [2020-10-27 22:26:12,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:26:12,332 INFO L481 AbstractCegarLoop]: Abstraction has 335 states and 462 transitions. [2020-10-27 22:26:12,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 22:26:12,333 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 462 transitions. [2020-10-27 22:26:12,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-27 22:26:12,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:26:12,334 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 7, 7, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:26:12,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 22:26:12,334 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:26:12,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:26:12,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1979888799, now seen corresponding path program 2 times [2020-10-27 22:26:12,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:26:12,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167963156] [2020-10-27 22:26:12,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:26:12,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:26:12,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:26:14,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:26:14,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-27 22:26:14,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:26:14,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1754 [2020-10-27 22:26:14,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:26:14,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 22:26:14,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 22:26:14,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-27 22:26:14,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:26:14,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:26:14,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:26:14,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:26:14,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:26:14,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:26:14,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:26:14,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 22:26:14,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:26:14,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:26:14,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:26:14,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:26:14,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:26:14,284 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 68 proven. 206 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-27 22:26:14,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167963156] [2020-10-27 22:26:14,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:26:14,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 22:26:14,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596530665] [2020-10-27 22:26:14,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 22:26:14,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:26:14,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 22:26:14,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 22:26:14,287 INFO L87 Difference]: Start difference. First operand 335 states and 462 transitions. Second operand 9 states. [2020-10-27 22:26:15,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:26:15,715 INFO L93 Difference]: Finished difference Result 482 states and 668 transitions. [2020-10-27 22:26:15,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 22:26:15,715 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 124 [2020-10-27 22:26:15,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:26:15,719 INFO L225 Difference]: With dead ends: 482 [2020-10-27 22:26:15,719 INFO L226 Difference]: Without dead ends: 396 [2020-10-27 22:26:15,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-27 22:26:15,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2020-10-27 22:26:15,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 352. [2020-10-27 22:26:15,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-10-27 22:26:15,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 486 transitions. [2020-10-27 22:26:15,739 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 486 transitions. Word has length 124 [2020-10-27 22:26:15,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:26:15,740 INFO L481 AbstractCegarLoop]: Abstraction has 352 states and 486 transitions. [2020-10-27 22:26:15,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 22:26:15,740 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 486 transitions. [2020-10-27 22:26:15,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-27 22:26:15,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:26:15,742 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 8, 8, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:26:15,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 22:26:15,742 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:26:15,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:26:15,743 INFO L82 PathProgramCache]: Analyzing trace with hash -635172341, now seen corresponding path program 2 times [2020-10-27 22:26:15,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:26:15,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [869474441] [2020-10-27 22:26:15,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:26:15,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:26:15,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:26:18,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:26:18,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-27 22:26:18,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:26:18,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2365 [2020-10-27 22:26:18,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:26:18,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 22:26:18,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 22:26:18,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-27 22:26:18,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:26:18,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:26:18,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:26:18,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:26:18,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:26:18,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:26:18,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:26:18,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 22:26:18,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:26:18,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:26:18,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:26:18,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:26:18,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:26:18,889 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 33 proven. 334 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 22:26:18,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [869474441] [2020-10-27 22:26:18,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:26:18,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 22:26:18,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682684312] [2020-10-27 22:26:18,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 22:26:18,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:26:18,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 22:26:18,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-27 22:26:18,891 INFO L87 Difference]: Start difference. First operand 352 states and 486 transitions. Second operand 14 states. [2020-10-27 22:26:22,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:26:22,586 INFO L93 Difference]: Finished difference Result 395 states and 543 transitions. [2020-10-27 22:26:22,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 22:26:22,587 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 137 [2020-10-27 22:26:22,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:26:22,589 INFO L225 Difference]: With dead ends: 395 [2020-10-27 22:26:22,589 INFO L226 Difference]: Without dead ends: 392 [2020-10-27 22:26:22,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2020-10-27 22:26:22,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2020-10-27 22:26:22,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 391. [2020-10-27 22:26:22,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2020-10-27 22:26:22,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 539 transitions. [2020-10-27 22:26:22,611 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 539 transitions. Word has length 137 [2020-10-27 22:26:22,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:26:22,612 INFO L481 AbstractCegarLoop]: Abstraction has 391 states and 539 transitions. [2020-10-27 22:26:22,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 22:26:22,612 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 539 transitions. [2020-10-27 22:26:22,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-27 22:26:22,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:26:22,614 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:26:22,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 22:26:22,614 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:26:22,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:26:22,615 INFO L82 PathProgramCache]: Analyzing trace with hash 270696601, now seen corresponding path program 2 times [2020-10-27 22:26:22,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:26:22,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934591026] [2020-10-27 22:26:22,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:26:22,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:26:22,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:26:25,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:26:25,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-27 22:26:25,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:26:25,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2356 [2020-10-27 22:26:25,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:26:25,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 22:26:25,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 22:26:25,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 139 [2020-10-27 22:26:25,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:26:25,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:26:25,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:26:25,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:26:25,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:26:25,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:26:25,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:26:25,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 22:26:25,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:26:25,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:26:25,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:26:25,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:26:25,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:26:25,542 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 36 proven. 417 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 22:26:25,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934591026] [2020-10-27 22:26:25,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:26:25,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 22:26:25,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897746419] [2020-10-27 22:26:25,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 22:26:25,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:26:25,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 22:26:25,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-27 22:26:25,544 INFO L87 Difference]: Start difference. First operand 391 states and 539 transitions. Second operand 15 states. [2020-10-27 22:26:30,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:26:30,320 INFO L93 Difference]: Finished difference Result 416 states and 572 transitions. [2020-10-27 22:26:30,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 22:26:30,321 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 153 [2020-10-27 22:26:30,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:26:30,324 INFO L225 Difference]: With dead ends: 416 [2020-10-27 22:26:30,324 INFO L226 Difference]: Without dead ends: 413 [2020-10-27 22:26:30,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-27 22:26:30,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2020-10-27 22:26:30,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 413. [2020-10-27 22:26:30,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 413 states. [2020-10-27 22:26:30,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 569 transitions. [2020-10-27 22:26:30,347 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 569 transitions. Word has length 153 [2020-10-27 22:26:30,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:26:30,347 INFO L481 AbstractCegarLoop]: Abstraction has 413 states and 569 transitions. [2020-10-27 22:26:30,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 22:26:30,347 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 569 transitions. [2020-10-27 22:26:30,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-27 22:26:30,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:26:30,350 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 10, 10, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:26:30,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 22:26:30,350 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:26:30,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:26:30,350 INFO L82 PathProgramCache]: Analyzing trace with hash 278436178, now seen corresponding path program 3 times [2020-10-27 22:26:30,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:26:30,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941088966] [2020-10-27 22:26:30,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:26:30,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:26:30,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:26:33,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:26:33,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-27 22:26:33,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:26:33,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2911 [2020-10-27 22:26:33,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:26:33,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 22:26:33,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 22:26:33,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-27 22:26:33,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:26:33,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:26:33,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:26:33,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:26:33,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:26:33,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:26:33,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:26:33,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 22:26:33,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:26:33,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:26:33,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:26:33,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:26:33,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:26:33,545 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 98 proven. 470 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-27 22:26:33,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941088966] [2020-10-27 22:26:33,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:26:33,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 22:26:33,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227152501] [2020-10-27 22:26:33,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 22:26:33,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:26:33,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 22:26:33,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 22:26:33,548 INFO L87 Difference]: Start difference. First operand 413 states and 569 transitions. Second operand 11 states. [2020-10-27 22:26:35,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:26:35,643 INFO L93 Difference]: Finished difference Result 560 states and 775 transitions. [2020-10-27 22:26:35,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 22:26:35,644 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 170 [2020-10-27 22:26:35,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:26:35,647 INFO L225 Difference]: With dead ends: 560 [2020-10-27 22:26:35,647 INFO L226 Difference]: Without dead ends: 474 [2020-10-27 22:26:35,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-27 22:26:35,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-10-27 22:26:35,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 430. [2020-10-27 22:26:35,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 430 states. [2020-10-27 22:26:35,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 593 transitions. [2020-10-27 22:26:35,675 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 593 transitions. Word has length 170 [2020-10-27 22:26:35,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:26:35,676 INFO L481 AbstractCegarLoop]: Abstraction has 430 states and 593 transitions. [2020-10-27 22:26:35,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 22:26:35,676 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 593 transitions. [2020-10-27 22:26:35,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-10-27 22:26:35,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:26:35,680 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 11, 11, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:26:35,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 22:26:35,680 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:26:35,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:26:35,681 INFO L82 PathProgramCache]: Analyzing trace with hash 2128128954, now seen corresponding path program 3 times [2020-10-27 22:26:35,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:26:35,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619380591] [2020-10-27 22:26:35,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:26:35,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:26:35,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:26:39,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:26:39,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-27 22:26:39,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:26:39,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4174 [2020-10-27 22:26:39,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:26:39,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 22:26:39,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 22:26:39,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 169 [2020-10-27 22:26:39,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:26:40,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:26:40,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:26:40,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:26:40,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:26:40,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:26:40,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:26:40,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 22:26:40,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:26:40,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:26:40,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:26:40,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:26:40,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:26:40,858 INFO L134 CoverageAnalysis]: Checked inductivity of 701 backedges. 45 proven. 656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 22:26:40,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619380591] [2020-10-27 22:26:40,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:26:40,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 22:26:40,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820995015] [2020-10-27 22:26:40,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 22:26:40,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:26:40,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 22:26:40,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-27 22:26:40,860 INFO L87 Difference]: Start difference. First operand 430 states and 593 transitions. Second operand 18 states. [2020-10-27 22:26:47,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:26:47,811 INFO L93 Difference]: Finished difference Result 472 states and 649 transitions. [2020-10-27 22:26:47,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 22:26:47,812 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 183 [2020-10-27 22:26:47,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:26:47,816 INFO L225 Difference]: With dead ends: 472 [2020-10-27 22:26:47,817 INFO L226 Difference]: Without dead ends: 469 [2020-10-27 22:26:47,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 22:26:47,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2020-10-27 22:26:47,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 469. [2020-10-27 22:26:47,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2020-10-27 22:26:47,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 646 transitions. [2020-10-27 22:26:47,842 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 646 transitions. Word has length 183 [2020-10-27 22:26:47,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:26:47,843 INFO L481 AbstractCegarLoop]: Abstraction has 469 states and 646 transitions. [2020-10-27 22:26:47,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 22:26:47,843 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 646 transitions. [2020-10-27 22:26:47,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-10-27 22:26:47,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:26:47,845 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 12, 12, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:26:47,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 22:26:47,846 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:26:47,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:26:47,846 INFO L82 PathProgramCache]: Analyzing trace with hash -980163512, now seen corresponding path program 3 times [2020-10-27 22:26:47,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:26:47,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561941689] [2020-10-27 22:26:47,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:26:47,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:26:47,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:26:52,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:26:52,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 207 [2020-10-27 22:26:52,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:26:52,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4168 [2020-10-27 22:26:52,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:26:52,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 22:26:52,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 22:26:52,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 185 [2020-10-27 22:26:52,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:26:52,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:26:52,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:26:52,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:26:52,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:26:52,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:26:52,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:26:52,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 22:26:52,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:26:52,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:26:52,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:26:52,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:26:52,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:26:52,770 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 48 proven. 772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 22:26:52,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561941689] [2020-10-27 22:26:52,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:26:52,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 22:26:52,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975635677] [2020-10-27 22:26:52,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 22:26:52,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:26:52,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 22:26:52,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2020-10-27 22:26:52,772 INFO L87 Difference]: Start difference. First operand 469 states and 646 transitions. Second operand 19 states. [2020-10-27 22:26:59,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:26:59,809 INFO L93 Difference]: Finished difference Result 494 states and 679 transitions. [2020-10-27 22:26:59,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 22:26:59,810 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 199 [2020-10-27 22:26:59,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:26:59,813 INFO L225 Difference]: With dead ends: 494 [2020-10-27 22:26:59,813 INFO L226 Difference]: Without dead ends: 491 [2020-10-27 22:26:59,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 22:26:59,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2020-10-27 22:26:59,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 491. [2020-10-27 22:26:59,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 491 states. [2020-10-27 22:26:59,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 676 transitions. [2020-10-27 22:26:59,842 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 676 transitions. Word has length 199 [2020-10-27 22:26:59,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:26:59,842 INFO L481 AbstractCegarLoop]: Abstraction has 491 states and 676 transitions. [2020-10-27 22:26:59,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 22:26:59,843 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 676 transitions. [2020-10-27 22:26:59,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-10-27 22:26:59,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:26:59,846 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 13, 13, 8, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:26:59,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 22:26:59,847 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:26:59,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:26:59,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1787614845, now seen corresponding path program 4 times [2020-10-27 22:26:59,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:26:59,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679073886] [2020-10-27 22:26:59,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:26:59,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:26:59,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:27:04,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:27:04,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 224 [2020-10-27 22:27:04,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:27:04,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-27 22:27:04,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:27:04,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 22:27:04,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 22:27:04,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 194 [2020-10-27 22:27:04,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:27:05,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:27:05,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:27:05,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:27:05,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:27:05,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:27:05,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:27:05,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 22:27:05,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:27:05,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:27:05,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:27:05,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:27:05,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:27:05,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 128 proven. 842 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-27 22:27:05,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679073886] [2020-10-27 22:27:05,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:27:05,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 22:27:05,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525337072] [2020-10-27 22:27:05,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 22:27:05,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:27:05,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 22:27:05,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 22:27:05,353 INFO L87 Difference]: Start difference. First operand 491 states and 676 transitions. Second operand 13 states. [2020-10-27 22:27:07,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:27:07,834 INFO L93 Difference]: Finished difference Result 638 states and 882 transitions. [2020-10-27 22:27:07,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 22:27:07,835 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 216 [2020-10-27 22:27:07,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:27:07,839 INFO L225 Difference]: With dead ends: 638 [2020-10-27 22:27:07,839 INFO L226 Difference]: Without dead ends: 552 [2020-10-27 22:27:07,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-27 22:27:07,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2020-10-27 22:27:07,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 508. [2020-10-27 22:27:07,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 508 states. [2020-10-27 22:27:07,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 700 transitions. [2020-10-27 22:27:07,866 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 700 transitions. Word has length 216 [2020-10-27 22:27:07,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:27:07,867 INFO L481 AbstractCegarLoop]: Abstraction has 508 states and 700 transitions. [2020-10-27 22:27:07,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 22:27:07,867 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 700 transitions. [2020-10-27 22:27:07,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-10-27 22:27:07,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:27:07,870 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 14, 14, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:27:07,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 22:27:07,870 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:27:07,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:27:07,871 INFO L82 PathProgramCache]: Analyzing trace with hash 689681193, now seen corresponding path program 4 times [2020-10-27 22:27:07,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:27:07,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361643134] [2020-10-27 22:27:07,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:27:08,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:27:08,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:27:13,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:27:13,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 237 [2020-10-27 22:27:13,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:27:13,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5207 [2020-10-27 22:27:13,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:27:13,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 22:27:13,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 22:27:13,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 215 [2020-10-27 22:27:13,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:27:14,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:27:14,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:27:14,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:27:14,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:27:14,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:27:14,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:27:14,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 22:27:14,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:27:14,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:27:14,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:27:14,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:27:14,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:27:14,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 57 proven. 1086 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 22:27:14,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361643134] [2020-10-27 22:27:14,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:27:14,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 22:27:14,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879349477] [2020-10-27 22:27:14,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 22:27:14,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:27:14,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 22:27:14,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2020-10-27 22:27:14,564 INFO L87 Difference]: Start difference. First operand 508 states and 700 transitions. Second operand 22 states. [2020-10-27 22:27:25,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:27:25,089 INFO L93 Difference]: Finished difference Result 551 states and 757 transitions. [2020-10-27 22:27:25,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 22:27:25,091 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 229 [2020-10-27 22:27:25,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:27:25,094 INFO L225 Difference]: With dead ends: 551 [2020-10-27 22:27:25,094 INFO L226 Difference]: Without dead ends: 548 [2020-10-27 22:27:25,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=129, Invalid=1511, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 22:27:25,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2020-10-27 22:27:25,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 547. [2020-10-27 22:27:25,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 547 states. [2020-10-27 22:27:25,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 753 transitions. [2020-10-27 22:27:25,123 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 753 transitions. Word has length 229 [2020-10-27 22:27:25,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:27:25,124 INFO L481 AbstractCegarLoop]: Abstraction has 547 states and 753 transitions. [2020-10-27 22:27:25,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 22:27:25,124 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 753 transitions. [2020-10-27 22:27:25,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-27 22:27:25,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:27:25,127 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 15, 15, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:27:25,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 22:27:25,128 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:27:25,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:27:25,128 INFO L82 PathProgramCache]: Analyzing trace with hash 680537527, now seen corresponding path program 4 times [2020-10-27 22:27:25,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:27:25,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [290938381] [2020-10-27 22:27:25,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:27:25,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:27:25,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:27:30,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:27:30,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-10-27 22:27:30,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:27:30,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-27 22:27:30,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:27:30,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 22:27:30,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 22:27:30,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 231 [2020-10-27 22:27:30,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:27:31,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:27:31,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:27:31,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:27:31,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:27:31,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:27:31,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:27:31,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 22:27:31,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:27:31,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:27:31,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:27:31,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:27:31,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:27:31,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1295 backedges. 60 proven. 1235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 22:27:31,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [290938381] [2020-10-27 22:27:31,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:27:31,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 22:27:31,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611192867] [2020-10-27 22:27:31,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 22:27:31,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:27:31,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 22:27:31,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2020-10-27 22:27:31,557 INFO L87 Difference]: Start difference. First operand 547 states and 753 transitions. Second operand 23 states. [2020-10-27 22:27:41,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:27:41,762 INFO L93 Difference]: Finished difference Result 572 states and 786 transitions. [2020-10-27 22:27:41,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 22:27:41,766 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 245 [2020-10-27 22:27:41,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:27:41,769 INFO L225 Difference]: With dead ends: 572 [2020-10-27 22:27:41,770 INFO L226 Difference]: Without dead ends: 569 [2020-10-27 22:27:41,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=135, Invalid=1671, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 22:27:41,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2020-10-27 22:27:41,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 569. [2020-10-27 22:27:41,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 569 states. [2020-10-27 22:27:41,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 783 transitions. [2020-10-27 22:27:41,820 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 783 transitions. Word has length 245 [2020-10-27 22:27:41,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:27:41,821 INFO L481 AbstractCegarLoop]: Abstraction has 569 states and 783 transitions. [2020-10-27 22:27:41,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 22:27:41,821 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 783 transitions. [2020-10-27 22:27:41,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2020-10-27 22:27:41,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:27:41,823 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 16, 16, 10, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:27:41,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 22:27:41,824 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:27:41,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:27:41,824 INFO L82 PathProgramCache]: Analyzing trace with hash -558691340, now seen corresponding path program 5 times [2020-10-27 22:27:41,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:27:41,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850032684] [2020-10-27 22:27:41,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:27:41,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:27:42,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:27:46,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:27:46,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 270 [2020-10-27 22:27:46,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:27:46,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 22:27:46,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:27:46,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 22:27:46,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 22:27:46,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 240 [2020-10-27 22:27:46,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:27:47,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:27:47,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:27:47,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:27:47,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:27:47,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:27:47,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:27:47,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 22:27:47,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:27:47,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:27:47,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:27:47,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:27:47,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:27:47,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1530 backedges. 158 proven. 1322 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-27 22:27:47,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850032684] [2020-10-27 22:27:47,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:27:47,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 22:27:47,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567815779] [2020-10-27 22:27:47,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 22:27:47,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:27:47,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 22:27:47,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 22:27:47,324 INFO L87 Difference]: Start difference. First operand 569 states and 783 transitions. Second operand 15 states. [2020-10-27 22:27:50,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:27:50,780 INFO L93 Difference]: Finished difference Result 716 states and 989 transitions. [2020-10-27 22:27:50,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 22:27:50,781 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 262 [2020-10-27 22:27:50,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:27:50,786 INFO L225 Difference]: With dead ends: 716 [2020-10-27 22:27:50,786 INFO L226 Difference]: Without dead ends: 630 [2020-10-27 22:27:50,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-10-27 22:27:50,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2020-10-27 22:27:50,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 586. [2020-10-27 22:27:50,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 586 states. [2020-10-27 22:27:50,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 807 transitions. [2020-10-27 22:27:50,816 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 807 transitions. Word has length 262 [2020-10-27 22:27:50,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:27:50,816 INFO L481 AbstractCegarLoop]: Abstraction has 586 states and 807 transitions. [2020-10-27 22:27:50,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 22:27:50,817 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 807 transitions. [2020-10-27 22:27:50,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2020-10-27 22:27:50,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:27:50,819 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 17, 17, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:27:50,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 22:27:50,819 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:27:50,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:27:50,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1658777512, now seen corresponding path program 5 times [2020-10-27 22:27:50,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:27:50,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105670789] [2020-10-27 22:27:50,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:27:51,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:27:51,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:27:56,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:27:56,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 283 [2020-10-27 22:27:56,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:27:56,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5152 [2020-10-27 22:27:56,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:27:56,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 22:27:56,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 22:27:56,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 261 [2020-10-27 22:27:56,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:27:57,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:27:57,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:27:57,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:27:57,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:27:57,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:27:57,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:27:57,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 22:27:57,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:27:57,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:27:57,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:27:57,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:27:57,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:27:57,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1693 backedges. 69 proven. 1624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 22:27:57,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105670789] [2020-10-27 22:27:57,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:27:57,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 22:27:57,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556347644] [2020-10-27 22:27:57,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 22:27:57,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:27:57,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 22:27:57,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-10-27 22:27:57,478 INFO L87 Difference]: Start difference. First operand 586 states and 807 transitions. Second operand 26 states. [2020-10-27 22:28:13,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:28:13,696 INFO L93 Difference]: Finished difference Result 628 states and 863 transitions. [2020-10-27 22:28:13,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 22:28:13,697 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 275 [2020-10-27 22:28:13,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:28:13,701 INFO L225 Difference]: With dead ends: 628 [2020-10-27 22:28:13,702 INFO L226 Difference]: Without dead ends: 625 [2020-10-27 22:28:13,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 22:28:13,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2020-10-27 22:28:13,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 625. [2020-10-27 22:28:13,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2020-10-27 22:28:13,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 860 transitions. [2020-10-27 22:28:13,732 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 860 transitions. Word has length 275 [2020-10-27 22:28:13,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:28:13,733 INFO L481 AbstractCegarLoop]: Abstraction has 625 states and 860 transitions. [2020-10-27 22:28:13,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 22:28:13,733 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 860 transitions. [2020-10-27 22:28:13,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2020-10-27 22:28:13,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:28:13,736 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 18, 18, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:28:13,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 22:28:13,736 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:28:13,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:28:13,737 INFO L82 PathProgramCache]: Analyzing trace with hash 2003520742, now seen corresponding path program 5 times [2020-10-27 22:28:13,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:28:13,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812789853] [2020-10-27 22:28:13,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:28:13,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:28:13,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:18,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:28:18,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 299 [2020-10-27 22:28:18,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:28:18,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5173 [2020-10-27 22:28:19,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:28:19,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 22:28:19,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 22:28:19,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 277 [2020-10-27 22:28:19,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:28:20,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:28:20,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:28:20,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:20,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:28:20,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:28:20,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:28:20,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 22:28:20,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:28:20,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:28:20,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:28:20,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:28:20,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:28:20,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1878 backedges. 72 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 22:28:20,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812789853] [2020-10-27 22:28:20,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:28:20,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 22:28:20,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941975722] [2020-10-27 22:28:20,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 22:28:20,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:28:20,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 22:28:20,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=646, Unknown=0, NotChecked=0, Total=702 [2020-10-27 22:28:20,622 INFO L87 Difference]: Start difference. First operand 625 states and 860 transitions. Second operand 27 states. [2020-10-27 22:28:37,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:28:37,858 INFO L93 Difference]: Finished difference Result 650 states and 893 transitions. [2020-10-27 22:28:37,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 22:28:37,859 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 291 [2020-10-27 22:28:37,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:28:37,864 INFO L225 Difference]: With dead ends: 650 [2020-10-27 22:28:37,864 INFO L226 Difference]: Without dead ends: 647 [2020-10-27 22:28:37,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=162, Invalid=2388, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 22:28:37,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2020-10-27 22:28:37,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 647. [2020-10-27 22:28:37,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 647 states. [2020-10-27 22:28:37,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 890 transitions. [2020-10-27 22:28:37,896 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 890 transitions. Word has length 291 [2020-10-27 22:28:37,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:28:37,897 INFO L481 AbstractCegarLoop]: Abstraction has 647 states and 890 transitions. [2020-10-27 22:28:37,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 22:28:37,897 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 890 transitions. [2020-10-27 22:28:37,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2020-10-27 22:28:37,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:28:37,899 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 26, 19, 19, 12, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:28:37,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 22:28:37,900 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:28:37,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:28:37,900 INFO L82 PathProgramCache]: Analyzing trace with hash -2107486043, now seen corresponding path program 6 times [2020-10-27 22:28:37,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:28:37,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981714194] [2020-10-27 22:28:37,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:28:38,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:28:38,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:43,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:28:43,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 316 [2020-10-27 22:28:43,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:28:43,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 22:28:43,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:28:43,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 22:28:43,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 22:28:43,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 286 [2020-10-27 22:28:43,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:28:43,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:28:43,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:28:43,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:43,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:28:43,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:28:43,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:28:43,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 22:28:43,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:28:43,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:28:43,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:28:43,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:28:43,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:28:43,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2158 backedges. 188 proven. 1910 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-27 22:28:43,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981714194] [2020-10-27 22:28:43,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:28:43,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 22:28:43,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900970893] [2020-10-27 22:28:43,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 22:28:43,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:28:43,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 22:28:43,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 22:28:43,591 INFO L87 Difference]: Start difference. First operand 647 states and 890 transitions. Second operand 17 states. [2020-10-27 22:28:47,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:28:47,549 INFO L93 Difference]: Finished difference Result 794 states and 1096 transitions. [2020-10-27 22:28:47,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 22:28:47,550 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 308 [2020-10-27 22:28:47,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:28:47,555 INFO L225 Difference]: With dead ends: 794 [2020-10-27 22:28:47,555 INFO L226 Difference]: Without dead ends: 708 [2020-10-27 22:28:47,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-10-27 22:28:47,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2020-10-27 22:28:47,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 664. [2020-10-27 22:28:47,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 664 states. [2020-10-27 22:28:47,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 914 transitions. [2020-10-27 22:28:47,586 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 914 transitions. Word has length 308 [2020-10-27 22:28:47,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:28:47,587 INFO L481 AbstractCegarLoop]: Abstraction has 664 states and 914 transitions. [2020-10-27 22:28:47,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 22:28:47,587 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 914 transitions. [2020-10-27 22:28:47,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-10-27 22:28:47,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:28:47,590 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 27, 20, 20, 13, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:28:47,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 22:28:47,590 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:28:47,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:28:47,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1044860089, now seen corresponding path program 6 times [2020-10-27 22:28:47,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:28:47,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496434028] [2020-10-27 22:28:47,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:28:47,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:28:48,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:53,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:28:53,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 329 [2020-10-27 22:28:53,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:28:53,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5341 [2020-10-27 22:28:53,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:28:53,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 22:28:53,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 22:28:53,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 307 [2020-10-27 22:28:53,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:28:55,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:28:55,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:28:55,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:55,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:28:55,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:28:55,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:28:55,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 22:28:55,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:28:55,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:28:55,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:28:55,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:28:55,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:28:55,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2351 backedges. 81 proven. 2270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 22:28:55,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496434028] [2020-10-27 22:28:55,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:28:55,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 22:28:55,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413579573] [2020-10-27 22:28:55,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 22:28:55,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:28:55,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 22:28:55,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=807, Unknown=0, NotChecked=0, Total=870 [2020-10-27 22:28:55,287 INFO L87 Difference]: Start difference. First operand 664 states and 914 transitions. Second operand 30 states.