/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label16.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 22:37:34,354 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 22:37:34,357 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 22:37:34,391 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 22:37:34,392 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 22:37:34,393 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 22:37:34,395 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 22:37:34,407 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 22:37:34,411 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 22:37:34,417 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 22:37:34,418 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 22:37:34,420 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 22:37:34,420 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 22:37:34,423 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 22:37:34,426 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 22:37:34,427 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 22:37:34,428 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 22:37:34,430 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 22:37:34,437 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 22:37:34,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 22:37:34,444 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 22:37:34,445 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 22:37:34,447 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 22:37:34,449 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 22:37:34,460 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 22:37:34,460 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 22:37:34,460 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 22:37:34,463 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 22:37:34,464 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 22:37:34,465 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 22:37:34,465 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 22:37:34,466 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 22:37:34,467 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 22:37:34,470 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 22:37:34,471 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 22:37:34,471 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 22:37:34,472 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 22:37:34,472 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 22:37:34,472 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 22:37:34,473 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 22:37:34,474 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 22:37:34,475 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 22:37:34,529 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 22:37:34,529 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 22:37:34,533 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 22:37:34,533 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 22:37:34,534 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 22:37:34,534 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 22:37:34,534 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 22:37:34,534 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 22:37:34,535 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 22:37:34,535 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 22:37:34,535 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 22:37:34,535 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 22:37:34,535 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 22:37:34,536 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 22:37:34,536 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 22:37:34,536 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 22:37:34,536 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 22:37:34,536 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 22:37:34,537 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 22:37:34,537 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 22:37:34,537 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 22:37:34,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 22:37:34,537 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 22:37:34,538 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 22:37:34,538 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 22:37:34,538 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 22:37:34,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 22:37:34,538 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 22:37:34,538 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 22:37:34,539 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 22:37:34,878 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 22:37:34,909 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 22:37:34,912 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 22:37:34,914 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 22:37:34,914 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 22:37:34,915 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label16.c [2020-10-26 22:37:34,997 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/88e968a95/10d524661376445899c2fe277db333c5/FLAG74c3e4a27 [2020-10-26 22:37:35,797 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 22:37:35,798 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem11_label16.c [2020-10-26 22:37:35,839 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/88e968a95/10d524661376445899c2fe277db333c5/FLAG74c3e4a27 [2020-10-26 22:37:35,966 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/88e968a95/10d524661376445899c2fe277db333c5 [2020-10-26 22:37:35,969 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 22:37:35,976 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 22:37:35,980 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 22:37:35,981 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 22:37:35,985 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 22:37:35,985 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:37:35" (1/1) ... [2020-10-26 22:37:35,990 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@225af211 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:37:35, skipping insertion in model container [2020-10-26 22:37:35,991 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:37:35" (1/1) ... [2020-10-26 22:37:35,999 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 22:37:36,078 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 22:37:36,711 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 22:37:36,725 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 22:37:36,930 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 22:37:36,948 INFO L208 MainTranslator]: Completed translation [2020-10-26 22:37:36,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:37:36 WrapperNode [2020-10-26 22:37:36,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 22:37:36,950 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 22:37:36,951 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 22:37:36,951 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 22:37:36,965 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:37:36" (1/1) ... [2020-10-26 22:37:36,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:37:36" (1/1) ... [2020-10-26 22:37:36,992 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:37:36" (1/1) ... [2020-10-26 22:37:36,992 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:37:36" (1/1) ... [2020-10-26 22:37:37,085 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:37:36" (1/1) ... [2020-10-26 22:37:37,110 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:37:36" (1/1) ... [2020-10-26 22:37:37,118 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:37:36" (1/1) ... [2020-10-26 22:37:37,128 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 22:37:37,129 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 22:37:37,130 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 22:37:37,130 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 22:37:37,131 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:37:36" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 22:37:37,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 22:37:37,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 22:37:37,210 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 22:37:37,211 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 22:37:37,211 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 22:37:37,212 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 22:37:37,212 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 22:37:37,212 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 22:37:37,212 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 22:37:37,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 22:37:37,213 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 22:37:37,214 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 22:37:37,214 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 22:37:37,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 22:37:37,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 22:37:37,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 22:37:37,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 22:37:37,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 22:37:37,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 22:37:39,350 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 22:37:39,351 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 22:37:39,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:37:39 BoogieIcfgContainer [2020-10-26 22:37:39,353 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 22:37:39,355 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 22:37:39,355 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 22:37:39,358 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 22:37:39,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 10:37:35" (1/3) ... [2020-10-26 22:37:39,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43200fbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:37:39, skipping insertion in model container [2020-10-26 22:37:39,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:37:36" (2/3) ... [2020-10-26 22:37:39,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43200fbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:37:39, skipping insertion in model container [2020-10-26 22:37:39,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:37:39" (3/3) ... [2020-10-26 22:37:39,362 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem11_label16.c [2020-10-26 22:37:39,373 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 22:37:39,380 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 22:37:39,395 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 22:37:39,432 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 22:37:39,432 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 22:37:39,432 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 22:37:39,432 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 22:37:39,433 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 22:37:39,433 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 22:37:39,433 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 22:37:39,433 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 22:37:39,458 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states. [2020-10-26 22:37:39,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-26 22:37:39,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:37:39,468 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:37:39,468 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:37:39,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:37:39,475 INFO L82 PathProgramCache]: Analyzing trace with hash 343382760, now seen corresponding path program 1 times [2020-10-26 22:37:39,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:37:39,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845939724] [2020-10-26 22:37:39,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:37:39,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:39,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:40,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:40,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 22:37:40,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:40,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 530 [2020-10-26 22:37:40,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:40,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:37:40,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:37:40,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-26 22:37:40,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 22:37:40,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:37:40,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:40,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:40,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:40,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:37:40,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:40,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 22:37:40,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:40,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:37:40,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:40,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:37:40,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:37:40,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:37:40,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845939724] [2020-10-26 22:37:40,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:37:40,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 22:37:40,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170102924] [2020-10-26 22:37:40,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 22:37:40,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:37:40,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 22:37:40,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 22:37:40,458 INFO L87 Difference]: Start difference. First operand 296 states. Second operand 4 states. [2020-10-26 22:37:40,608 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-26 22:37:43,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:37:43,503 INFO L93 Difference]: Finished difference Result 793 states and 1388 transitions. [2020-10-26 22:37:43,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:37:43,510 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2020-10-26 22:37:43,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:37:43,525 INFO L225 Difference]: With dead ends: 793 [2020-10-26 22:37:43,526 INFO L226 Difference]: Without dead ends: 432 [2020-10-26 22:37:43,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:37:43,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-10-26 22:37:43,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 426. [2020-10-26 22:37:43,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2020-10-26 22:37:43,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 613 transitions. [2020-10-26 22:37:43,622 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 613 transitions. Word has length 50 [2020-10-26 22:37:43,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:37:43,623 INFO L481 AbstractCegarLoop]: Abstraction has 426 states and 613 transitions. [2020-10-26 22:37:43,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 22:37:43,623 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 613 transitions. [2020-10-26 22:37:43,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-26 22:37:43,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:37:43,629 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:37:43,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 22:37:43,630 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:37:43,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:37:43,631 INFO L82 PathProgramCache]: Analyzing trace with hash 247409380, now seen corresponding path program 1 times [2020-10-26 22:37:43,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:37:43,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454370023] [2020-10-26 22:37:43,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:37:43,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:43,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:43,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:44,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:45,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:45,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-26 22:37:45,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:37:45,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1785 [2020-10-26 22:37:45,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:45,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:37:45,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:37:45,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 22:37:45,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:37:45,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:37:45,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:45,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:45,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:45,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:37:45,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:45,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 22:37:45,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:45,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:37:45,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:45,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:37:45,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:37:45,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:37:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:45,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:45,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:45,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 22:37:45,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:45,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 207 [2020-10-26 22:37:45,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:45,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:37:45,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:37:45,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-26 22:37:45,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:45,967 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:37:45,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454370023] [2020-10-26 22:37:45,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:37:45,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 22:37:45,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075614952] [2020-10-26 22:37:45,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:37:45,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:37:45,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:37:45,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:37:45,977 INFO L87 Difference]: Start difference. First operand 426 states and 613 transitions. Second operand 7 states. [2020-10-26 22:37:49,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:37:49,401 INFO L93 Difference]: Finished difference Result 1277 states and 1862 transitions. [2020-10-26 22:37:49,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:37:49,405 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 122 [2020-10-26 22:37:49,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:37:49,413 INFO L225 Difference]: With dead ends: 1277 [2020-10-26 22:37:49,413 INFO L226 Difference]: Without dead ends: 857 [2020-10-26 22:37:49,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:37:49,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2020-10-26 22:37:49,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 821. [2020-10-26 22:37:49,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 821 states. [2020-10-26 22:37:49,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1098 transitions. [2020-10-26 22:37:49,499 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1098 transitions. Word has length 122 [2020-10-26 22:37:49,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:37:49,500 INFO L481 AbstractCegarLoop]: Abstraction has 821 states and 1098 transitions. [2020-10-26 22:37:49,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:37:49,500 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1098 transitions. [2020-10-26 22:37:49,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-26 22:37:49,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:37:49,503 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 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] [2020-10-26 22:37:49,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 22:37:49,503 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:37:49,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:37:49,504 INFO L82 PathProgramCache]: Analyzing trace with hash -989112108, now seen corresponding path program 1 times [2020-10-26 22:37:49,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:37:49,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243393652] [2020-10-26 22:37:49,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:37:49,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:49,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:49,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:50,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:50,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:51,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:51,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-26 22:37:51,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 22:37:51,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1694 [2020-10-26 22:37:51,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:51,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 22:37:51,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:37:51,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 133 [2020-10-26 22:37:51,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:37:51,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:37:51,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:51,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:51,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:51,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:37:51,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:51,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 22:37:51,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:51,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:37:51,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:51,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:37:51,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:51,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:37:51,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:51,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:51,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:51,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:51,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 22:37:51,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:37:51,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 232 [2020-10-26 22:37:51,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:51,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:37:51,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:37:51,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 22:37:51,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:51,904 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 38 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 22:37:51,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1243393652] [2020-10-26 22:37:51,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:37:51,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 22:37:51,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91578020] [2020-10-26 22:37:51,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:37:51,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:37:51,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:37:51,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:37:51,911 INFO L87 Difference]: Start difference. First operand 821 states and 1098 transitions. Second operand 7 states. [2020-10-26 22:37:54,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:37:54,806 INFO L93 Difference]: Finished difference Result 2067 states and 2723 transitions. [2020-10-26 22:37:54,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 22:37:54,807 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 130 [2020-10-26 22:37:54,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:37:54,814 INFO L225 Difference]: With dead ends: 2067 [2020-10-26 22:37:54,815 INFO L226 Difference]: Without dead ends: 1252 [2020-10-26 22:37:54,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-26 22:37:54,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2020-10-26 22:37:54,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 1215. [2020-10-26 22:37:54,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1215 states. [2020-10-26 22:37:54,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 1532 transitions. [2020-10-26 22:37:54,864 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 1532 transitions. Word has length 130 [2020-10-26 22:37:54,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:37:54,865 INFO L481 AbstractCegarLoop]: Abstraction has 1215 states and 1532 transitions. [2020-10-26 22:37:54,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:37:54,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 1532 transitions. [2020-10-26 22:37:54,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-26 22:37:54,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:37:54,869 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 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, 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, 1, 1, 1, 1, 1, 1] [2020-10-26 22:37:54,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 22:37:54,869 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:37:54,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:37:54,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1113194405, now seen corresponding path program 1 times [2020-10-26 22:37:54,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:37:54,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389187727] [2020-10-26 22:37:54,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:37:54,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:54,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:55,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:55,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-10-26 22:37:55,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:55,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 356 [2020-10-26 22:37:55,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:55,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:37:55,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 140 [2020-10-26 22:37:55,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-26 22:37:55,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:55,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:37:55,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:55,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:55,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:55,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:37:55,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:55,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 22:37:55,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:55,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:37:55,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:55,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:37:55,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:37:55,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:37:55,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:55,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:55,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:55,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:37:55,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:55,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-26 22:37:55,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:55,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:37:55,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:55,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-26 22:37:55,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:55,736 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 41 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:37:55,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389187727] [2020-10-26 22:37:55,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:37:55,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 22:37:55,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261172882] [2020-10-26 22:37:55,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 22:37:55,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:37:55,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 22:37:55,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:37:55,752 INFO L87 Difference]: Start difference. First operand 1215 states and 1532 transitions. Second operand 5 states. [2020-10-26 22:37:58,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:37:58,413 INFO L93 Difference]: Finished difference Result 2458 states and 3292 transitions. [2020-10-26 22:37:58,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:37:58,414 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 181 [2020-10-26 22:37:58,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:37:58,424 INFO L225 Difference]: With dead ends: 2458 [2020-10-26 22:37:58,424 INFO L226 Difference]: Without dead ends: 1627 [2020-10-26 22:37:58,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:37:58,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2020-10-26 22:37:58,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 1611. [2020-10-26 22:37:58,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1611 states. [2020-10-26 22:37:58,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 2091 transitions. [2020-10-26 22:37:58,483 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 2091 transitions. Word has length 181 [2020-10-26 22:37:58,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:37:58,484 INFO L481 AbstractCegarLoop]: Abstraction has 1611 states and 2091 transitions. [2020-10-26 22:37:58,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 22:37:58,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 2091 transitions. [2020-10-26 22:37:58,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2020-10-26 22:37:58,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:37:58,490 INFO L422 BasicCegarLoop]: trace histogram [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, 3, 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, 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, 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, 1] [2020-10-26 22:37:58,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 22:37:58,490 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:37:58,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:37:58,491 INFO L82 PathProgramCache]: Analyzing trace with hash 14971130, now seen corresponding path program 1 times [2020-10-26 22:37:58,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:37:58,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264733588] [2020-10-26 22:37:58,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:37:58,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:58,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:58,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:59,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:00,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:00,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 252 [2020-10-26 22:38:00,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:38:00,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1882 [2020-10-26 22:38:00,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:00,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:38:00,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 126 [2020-10-26 22:38:00,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 22:38:00,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:00,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:38:00,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:00,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:00,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:00,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:38:00,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:00,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 22:38:00,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:00,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:38:00,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:00,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:38:00,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:00,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:38:00,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:00,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:00,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:00,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:38:00,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:00,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-26 22:38:00,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:00,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:38:00,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:00,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-26 22:38:00,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:00,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:38:00,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:00,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:00,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:00,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 22:38:00,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:00,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-10-26 22:38:00,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:00,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:38:00,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:38:00,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-26 22:38:00,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:38:01,186 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 153 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:38:01,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264733588] [2020-10-26 22:38:01,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:38:01,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:38:01,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847281931] [2020-10-26 22:38:01,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:38:01,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:38:01,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:38:01,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:38:01,193 INFO L87 Difference]: Start difference. First operand 1611 states and 2091 transitions. Second operand 7 states. [2020-10-26 22:38:04,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:38:04,171 INFO L93 Difference]: Finished difference Result 3272 states and 4398 transitions. [2020-10-26 22:38:04,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 22:38:04,172 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 238 [2020-10-26 22:38:04,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:38:04,184 INFO L225 Difference]: With dead ends: 3272 [2020-10-26 22:38:04,184 INFO L226 Difference]: Without dead ends: 2045 [2020-10-26 22:38:04,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 22:38:04,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2020-10-26 22:38:04,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 2027. [2020-10-26 22:38:04,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2027 states. [2020-10-26 22:38:04,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 2645 transitions. [2020-10-26 22:38:04,260 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 2645 transitions. Word has length 238 [2020-10-26 22:38:04,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:38:04,261 INFO L481 AbstractCegarLoop]: Abstraction has 2027 states and 2645 transitions. [2020-10-26 22:38:04,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:38:04,261 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 2645 transitions. [2020-10-26 22:38:04,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-10-26 22:38:04,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:38:04,266 INFO L422 BasicCegarLoop]: trace histogram [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, 3, 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, 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, 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] [2020-10-26 22:38:04,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 22:38:04,266 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:38:04,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:38:04,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1569228690, now seen corresponding path program 1 times [2020-10-26 22:38:04,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:38:04,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153234823] [2020-10-26 22:38:04,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:38:04,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:04,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:04,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:05,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:07,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:07,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-10-26 22:38:07,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:38:07,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2960 [2020-10-26 22:38:07,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:07,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 22:38:07,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:38:07,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 209 [2020-10-26 22:38:07,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:07,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:38:07,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:07,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:07,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:07,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:38:07,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:07,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 22:38:07,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:07,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:38:07,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:07,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:38:07,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:07,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:38:07,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:07,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:07,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:07,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:38:07,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:07,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 220 [2020-10-26 22:38:07,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:07,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:38:07,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:38:07,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-26 22:38:07,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:08,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:38:08,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:08,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:08,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:08,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-26 22:38:08,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:08,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 203 [2020-10-26 22:38:08,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:08,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 22:38:08,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:38:08,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 22:38:08,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:38:08,747 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 136 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 22:38:08,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153234823] [2020-10-26 22:38:08,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:38:08,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 22:38:08,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839099160] [2020-10-26 22:38:08,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 22:38:08,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:38:08,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 22:38:08,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-26 22:38:08,752 INFO L87 Difference]: Start difference. First operand 2027 states and 2645 transitions. Second operand 9 states. [2020-10-26 22:38:10,313 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 84 [2020-10-26 22:38:11,094 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2020-10-26 22:38:12,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:38:12,620 INFO L93 Difference]: Finished difference Result 2995 states and 4100 transitions. [2020-10-26 22:38:12,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 22:38:12,629 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 239 [2020-10-26 22:38:12,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:38:12,642 INFO L225 Difference]: With dead ends: 2995 [2020-10-26 22:38:12,643 INFO L226 Difference]: Without dead ends: 2130 [2020-10-26 22:38:12,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-26 22:38:12,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2130 states. [2020-10-26 22:38:12,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2130 to 2037. [2020-10-26 22:38:12,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2037 states. [2020-10-26 22:38:12,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2037 states to 2037 states and 2655 transitions. [2020-10-26 22:38:12,727 INFO L78 Accepts]: Start accepts. Automaton has 2037 states and 2655 transitions. Word has length 239 [2020-10-26 22:38:12,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:38:12,727 INFO L481 AbstractCegarLoop]: Abstraction has 2037 states and 2655 transitions. [2020-10-26 22:38:12,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 22:38:12,727 INFO L276 IsEmpty]: Start isEmpty. Operand 2037 states and 2655 transitions. [2020-10-26 22:38:12,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-10-26 22:38:12,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:38:12,732 INFO L422 BasicCegarLoop]: trace histogram [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, 3, 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, 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, 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] [2020-10-26 22:38:12,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 22:38:12,732 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:38:12,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:38:12,733 INFO L82 PathProgramCache]: Analyzing trace with hash 443541238, now seen corresponding path program 1 times [2020-10-26 22:38:12,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:38:12,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961922587] [2020-10-26 22:38:12,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:38:12,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:12,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:12,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:13,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:15,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:15,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 254 [2020-10-26 22:38:15,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:38:15,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2595 [2020-10-26 22:38:15,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:15,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:38:15,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 126 [2020-10-26 22:38:15,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-26 22:38:15,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:15,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:38:15,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:15,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:15,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:15,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:38:15,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:15,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 22:38:15,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:15,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:38:15,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:15,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:38:15,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:15,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:38:15,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:15,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:15,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:15,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:38:15,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:15,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-26 22:38:15,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:15,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:38:15,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:15,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-26 22:38:15,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:15,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:38:15,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:15,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:15,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:15,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 22:38:15,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:15,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-26 22:38:15,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:15,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:38:15,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:38:15,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 22:38:15,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:16,250 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 155 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:38:16,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961922587] [2020-10-26 22:38:16,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:38:16,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:38:16,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801750258] [2020-10-26 22:38:16,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:38:16,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:38:16,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:38:16,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:38:16,254 INFO L87 Difference]: Start difference. First operand 2037 states and 2655 transitions. Second operand 7 states. [2020-10-26 22:38:19,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:38:19,742 INFO L93 Difference]: Finished difference Result 4180 states and 5850 transitions. [2020-10-26 22:38:19,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:38:19,743 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 240 [2020-10-26 22:38:19,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:38:19,758 INFO L225 Difference]: With dead ends: 4180 [2020-10-26 22:38:19,758 INFO L226 Difference]: Without dead ends: 2527 [2020-10-26 22:38:19,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-26 22:38:19,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2527 states. [2020-10-26 22:38:19,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2527 to 2436. [2020-10-26 22:38:19,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2436 states. [2020-10-26 22:38:19,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2436 states to 2436 states and 3130 transitions. [2020-10-26 22:38:19,854 INFO L78 Accepts]: Start accepts. Automaton has 2436 states and 3130 transitions. Word has length 240 [2020-10-26 22:38:19,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:38:19,855 INFO L481 AbstractCegarLoop]: Abstraction has 2436 states and 3130 transitions. [2020-10-26 22:38:19,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:38:19,855 INFO L276 IsEmpty]: Start isEmpty. Operand 2436 states and 3130 transitions. [2020-10-26 22:38:19,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-10-26 22:38:19,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:38:19,860 INFO L422 BasicCegarLoop]: trace histogram [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, 3, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:38:19,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 22:38:19,860 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:38:19,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:38:19,862 INFO L82 PathProgramCache]: Analyzing trace with hash -725490462, now seen corresponding path program 1 times [2020-10-26 22:38:19,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:38:19,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1431236305] [2020-10-26 22:38:19,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:38:19,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:19,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:20,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:20,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:20,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 264 [2020-10-26 22:38:20,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:38:20,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 678 [2020-10-26 22:38:20,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:20,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:38:20,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 212 [2020-10-26 22:38:20,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 22:38:20,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:20,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:38:20,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:20,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:20,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:20,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:38:20,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:20,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 22:38:20,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:20,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:38:20,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:20,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:38:20,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:20,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:38:20,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:20,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:20,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:20,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:38:20,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:20,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-26 22:38:20,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:20,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:38:20,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:20,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:38:20,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:20,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:38:20,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:20,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:21,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:21,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-26 22:38:21,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:21,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-26 22:38:21,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:21,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:38:21,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:21,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-26 22:38:21,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:21,193 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 85 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-26 22:38:21,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1431236305] [2020-10-26 22:38:21,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:38:21,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 22:38:21,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627636206] [2020-10-26 22:38:21,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 22:38:21,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:38:21,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 22:38:21,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:38:21,196 INFO L87 Difference]: Start difference. First operand 2436 states and 3130 transitions. Second operand 5 states. [2020-10-26 22:38:22,128 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-10-26 22:38:23,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:38:23,152 INFO L93 Difference]: Finished difference Result 3529 states and 4690 transitions. [2020-10-26 22:38:23,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:38:23,154 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 250 [2020-10-26 22:38:23,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:38:23,166 INFO L225 Difference]: With dead ends: 3529 [2020-10-26 22:38:23,166 INFO L226 Difference]: Without dead ends: 2444 [2020-10-26 22:38:23,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:38:23,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states. [2020-10-26 22:38:23,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2444 to 2434. [2020-10-26 22:38:23,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2434 states. [2020-10-26 22:38:23,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2434 states to 2434 states and 3113 transitions. [2020-10-26 22:38:23,241 INFO L78 Accepts]: Start accepts. Automaton has 2434 states and 3113 transitions. Word has length 250 [2020-10-26 22:38:23,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:38:23,242 INFO L481 AbstractCegarLoop]: Abstraction has 2434 states and 3113 transitions. [2020-10-26 22:38:23,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 22:38:23,242 INFO L276 IsEmpty]: Start isEmpty. Operand 2434 states and 3113 transitions. [2020-10-26 22:38:23,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-10-26 22:38:23,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:38:23,247 INFO L422 BasicCegarLoop]: trace histogram [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, 3, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:38:23,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 22:38:23,247 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:38:23,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:38:23,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1546697058, now seen corresponding path program 1 times [2020-10-26 22:38:23,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:38:23,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949737026] [2020-10-26 22:38:23,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:38:23,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:23,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:23,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:23,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:25,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:25,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 264 [2020-10-26 22:38:25,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:38:25,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2091 [2020-10-26 22:38:25,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:25,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:38:25,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 136 [2020-10-26 22:38:25,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-26 22:38:25,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:25,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:38:25,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:25,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:25,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:25,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:38:25,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:25,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 22:38:25,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:25,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:38:25,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:25,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:38:25,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:25,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:38:25,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:25,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:25,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:25,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-26 22:38:25,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:25,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-26 22:38:25,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:25,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:38:25,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:25,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-26 22:38:25,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:25,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-10-26 22:38:25,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:25,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:25,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:25,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 22:38:25,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:25,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-26 22:38:25,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:25,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:38:25,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:38:25,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 22:38:25,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:25,961 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 155 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:38:25,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949737026] [2020-10-26 22:38:25,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:38:25,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:38:25,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922789502] [2020-10-26 22:38:25,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:38:25,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:38:25,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:38:25,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:38:25,964 INFO L87 Difference]: Start difference. First operand 2434 states and 3113 transitions. Second operand 7 states. [2020-10-26 22:38:30,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:38:30,432 INFO L93 Difference]: Finished difference Result 5908 states and 7899 transitions. [2020-10-26 22:38:30,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:38:30,437 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 250 [2020-10-26 22:38:30,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:38:30,454 INFO L225 Difference]: With dead ends: 5908 [2020-10-26 22:38:30,455 INFO L226 Difference]: Without dead ends: 3858 [2020-10-26 22:38:30,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:38:30,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3858 states. [2020-10-26 22:38:30,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3858 to 3804. [2020-10-26 22:38:30,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3804 states. [2020-10-26 22:38:30,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3804 states to 3804 states and 4677 transitions. [2020-10-26 22:38:30,564 INFO L78 Accepts]: Start accepts. Automaton has 3804 states and 4677 transitions. Word has length 250 [2020-10-26 22:38:30,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:38:30,565 INFO L481 AbstractCegarLoop]: Abstraction has 3804 states and 4677 transitions. [2020-10-26 22:38:30,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:38:30,565 INFO L276 IsEmpty]: Start isEmpty. Operand 3804 states and 4677 transitions. [2020-10-26 22:38:30,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-10-26 22:38:30,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:38:30,571 INFO L422 BasicCegarLoop]: trace histogram [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, 3, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:38:30,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 22:38:30,571 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:38:30,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:38:30,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1937790809, now seen corresponding path program 1 times [2020-10-26 22:38:30,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:38:30,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140354305] [2020-10-26 22:38:30,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:38:30,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:30,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:30,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:30,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:31,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:33,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:35,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:35,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 267 [2020-10-26 22:38:35,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 22:38:35,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-26 22:38:35,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:35,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:38:35,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:38:35,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 136 [2020-10-26 22:38:35,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:35,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:38:35,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:35,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:35,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:35,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:38:35,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:35,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 22:38:35,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:35,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:38:35,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:35,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:38:35,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:35,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:38:35,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:35,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:35,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:36,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:36,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:38:36,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:38:36,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 251 [2020-10-26 22:38:36,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:36,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:38:36,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:38:36,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-26 22:38:36,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:36,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-26 22:38:36,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:36,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:36,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:36,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 22:38:36,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:36,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-26 22:38:36,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:36,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:38:36,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-10-26 22:38:36,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:38:36,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:36,468 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 84 proven. 67 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 22:38:36,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140354305] [2020-10-26 22:38:36,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:38:36,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:38:36,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657909091] [2020-10-26 22:38:36,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:38:36,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:38:36,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:38:36,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:38:36,470 INFO L87 Difference]: Start difference. First operand 3804 states and 4677 transitions. Second operand 7 states. [2020-10-26 22:38:39,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:38:39,561 INFO L93 Difference]: Finished difference Result 8414 states and 10744 transitions. [2020-10-26 22:38:39,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 22:38:39,562 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 253 [2020-10-26 22:38:39,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:38:39,582 INFO L225 Difference]: With dead ends: 8414 [2020-10-26 22:38:39,582 INFO L226 Difference]: Without dead ends: 4994 [2020-10-26 22:38:39,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 22:38:39,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4994 states. [2020-10-26 22:38:39,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4994 to 4976. [2020-10-26 22:38:39,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4976 states. [2020-10-26 22:38:39,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4976 states to 4976 states and 6127 transitions. [2020-10-26 22:38:39,715 INFO L78 Accepts]: Start accepts. Automaton has 4976 states and 6127 transitions. Word has length 253 [2020-10-26 22:38:39,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:38:39,716 INFO L481 AbstractCegarLoop]: Abstraction has 4976 states and 6127 transitions. [2020-10-26 22:38:39,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:38:39,716 INFO L276 IsEmpty]: Start isEmpty. Operand 4976 states and 6127 transitions. [2020-10-26 22:38:39,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-10-26 22:38:39,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:38:39,723 INFO L422 BasicCegarLoop]: trace histogram [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, 3, 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, 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, 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, 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] [2020-10-26 22:38:39,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 22:38:39,723 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:38:39,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:38:39,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1060420578, now seen corresponding path program 1 times [2020-10-26 22:38:39,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:38:39,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768141582] [2020-10-26 22:38:39,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:38:39,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:39,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:39,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:40,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:41,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:41,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 283 [2020-10-26 22:38:41,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:38:41,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1424 [2020-10-26 22:38:41,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:41,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:38:41,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 157 [2020-10-26 22:38:41,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 22:38:41,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:41,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:38:41,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:41,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:41,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:41,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:38:41,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:41,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 22:38:41,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:41,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:38:41,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:41,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:38:41,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:41,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:38:41,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:41,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:41,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:41,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-26 22:38:41,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:41,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-26 22:38:41,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:41,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:38:41,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:41,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-26 22:38:41,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:41,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-10-26 22:38:41,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:41,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:41,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:41,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 22:38:41,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:41,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-26 22:38:41,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:41,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:38:41,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:38:41,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-26 22:38:41,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:41,831 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 153 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:38:41,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768141582] [2020-10-26 22:38:41,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:38:41,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 22:38:41,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842757832] [2020-10-26 22:38:41,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 22:38:41,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:38:41,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 22:38:41,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:38:41,834 INFO L87 Difference]: Start difference. First operand 4976 states and 6127 transitions. Second operand 8 states. [2020-10-26 22:38:46,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:38:46,518 INFO L93 Difference]: Finished difference Result 10563 states and 13274 transitions. [2020-10-26 22:38:46,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:38:46,519 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 269 [2020-10-26 22:38:46,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:38:46,556 INFO L225 Difference]: With dead ends: 10563 [2020-10-26 22:38:46,556 INFO L226 Difference]: Without dead ends: 5971 [2020-10-26 22:38:46,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-26 22:38:46,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5971 states. [2020-10-26 22:38:46,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5971 to 5562. [2020-10-26 22:38:46,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5562 states. [2020-10-26 22:38:46,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5562 states to 5562 states and 6861 transitions. [2020-10-26 22:38:46,710 INFO L78 Accepts]: Start accepts. Automaton has 5562 states and 6861 transitions. Word has length 269 [2020-10-26 22:38:46,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:38:46,711 INFO L481 AbstractCegarLoop]: Abstraction has 5562 states and 6861 transitions. [2020-10-26 22:38:46,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 22:38:46,711 INFO L276 IsEmpty]: Start isEmpty. Operand 5562 states and 6861 transitions. [2020-10-26 22:38:46,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2020-10-26 22:38:46,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:38:46,725 INFO L422 BasicCegarLoop]: trace histogram [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, 4, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:38:46,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 22:38:46,725 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:38:46,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:38:46,726 INFO L82 PathProgramCache]: Analyzing trace with hash 694513390, now seen corresponding path program 1 times [2020-10-26 22:38:46,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:38:46,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476224590] [2020-10-26 22:38:46,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:38:46,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:46,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:46,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:48,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:48,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 377 [2020-10-26 22:38:48,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:38:48,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1868 [2020-10-26 22:38:48,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:48,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:38:48,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 224 [2020-10-26 22:38:48,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-26 22:38:48,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:48,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:38:48,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:48,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:48,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:48,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:38:48,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:48,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 22:38:48,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:48,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:38:48,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:48,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:38:48,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:48,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:38:48,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:48,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:48,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:48,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-26 22:38:48,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:48,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-26 22:38:48,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:48,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:38:48,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:48,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:38:48,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:48,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-10-26 22:38:48,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:48,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:49,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:49,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-26 22:38:49,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:49,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-26 22:38:49,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:49,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:38:49,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:49,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 22:38:49,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:49,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2020-10-26 22:38:49,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:49,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:49,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:49,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-26 22:38:49,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:49,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-26 22:38:49,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:49,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:38:49,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:38:49,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-26 22:38:49,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:49,352 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 310 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-10-26 22:38:49,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476224590] [2020-10-26 22:38:49,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:38:49,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:38:49,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064472328] [2020-10-26 22:38:49,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:38:49,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:38:49,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:38:49,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:38:49,355 INFO L87 Difference]: Start difference. First operand 5562 states and 6861 transitions. Second operand 7 states. [2020-10-26 22:38:52,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:38:52,918 INFO L93 Difference]: Finished difference Result 10373 states and 13276 transitions. [2020-10-26 22:38:52,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:38:52,919 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 361 [2020-10-26 22:38:52,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:38:52,942 INFO L225 Difference]: With dead ends: 10373 [2020-10-26 22:38:52,942 INFO L226 Difference]: Without dead ends: 6933 [2020-10-26 22:38:52,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 22:38:52,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6933 states. [2020-10-26 22:38:53,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6933 to 6907. [2020-10-26 22:38:53,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6907 states. [2020-10-26 22:38:53,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6907 states to 6907 states and 8461 transitions. [2020-10-26 22:38:53,103 INFO L78 Accepts]: Start accepts. Automaton has 6907 states and 8461 transitions. Word has length 361 [2020-10-26 22:38:53,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:38:53,104 INFO L481 AbstractCegarLoop]: Abstraction has 6907 states and 8461 transitions. [2020-10-26 22:38:53,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:38:53,105 INFO L276 IsEmpty]: Start isEmpty. Operand 6907 states and 8461 transitions. [2020-10-26 22:38:53,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2020-10-26 22:38:53,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:38:53,119 INFO L422 BasicCegarLoop]: trace histogram [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, 4, 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, 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, 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, 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, 1, 1] [2020-10-26 22:38:53,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 22:38:53,119 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:38:53,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:38:53,120 INFO L82 PathProgramCache]: Analyzing trace with hash -453086250, now seen corresponding path program 1 times [2020-10-26 22:38:53,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:38:53,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033598648] [2020-10-26 22:38:53,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:38:53,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:53,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:53,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:54,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:54,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 398 [2020-10-26 22:38:54,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:38:54,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1309 [2020-10-26 22:38:54,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:54,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:38:54,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 259 [2020-10-26 22:38:54,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 135 [2020-10-26 22:38:54,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:54,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:38:54,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:54,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:54,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:54,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:38:54,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:54,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 22:38:54,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:54,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:38:54,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:54,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:38:54,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:54,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:38:54,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:54,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:54,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:54,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:38:54,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:54,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-26 22:38:54,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:54,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:38:54,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:54,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:38:54,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:54,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:38:54,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:54,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:54,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:54,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:38:54,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:54,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-26 22:38:54,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:54,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:38:54,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:54,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-26 22:38:54,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:54,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2020-10-26 22:38:54,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:54,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:54,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:54,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:54,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-26 22:38:54,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:38:54,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-26 22:38:54,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:54,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:38:54,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:38:54,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-26 22:38:54,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:55,177 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 250 proven. 47 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-10-26 22:38:55,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033598648] [2020-10-26 22:38:55,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:38:55,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:38:55,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562990868] [2020-10-26 22:38:55,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:38:55,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:38:55,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:38:55,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:38:55,180 INFO L87 Difference]: Start difference. First operand 6907 states and 8461 transitions. Second operand 7 states. [2020-10-26 22:38:58,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:38:58,141 INFO L93 Difference]: Finished difference Result 11740 states and 14666 transitions. [2020-10-26 22:38:58,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 22:38:58,142 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 382 [2020-10-26 22:38:58,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:38:58,162 INFO L225 Difference]: With dead ends: 11740 [2020-10-26 22:38:58,163 INFO L226 Difference]: Without dead ends: 6957 [2020-10-26 22:38:58,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-26 22:38:58,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6957 states. [2020-10-26 22:38:58,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6957 to 6899. [2020-10-26 22:38:58,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6899 states. [2020-10-26 22:38:58,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6899 states to 6899 states and 8146 transitions. [2020-10-26 22:38:58,320 INFO L78 Accepts]: Start accepts. Automaton has 6899 states and 8146 transitions. Word has length 382 [2020-10-26 22:38:58,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:38:58,321 INFO L481 AbstractCegarLoop]: Abstraction has 6899 states and 8146 transitions. [2020-10-26 22:38:58,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:38:58,321 INFO L276 IsEmpty]: Start isEmpty. Operand 6899 states and 8146 transitions. [2020-10-26 22:38:58,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2020-10-26 22:38:58,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:38:58,340 INFO L422 BasicCegarLoop]: trace histogram [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, 4, 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, 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, 3, 3, 3, 3, 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, 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] [2020-10-26 22:38:58,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 22:38:58,341 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:38:58,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:38:58,341 INFO L82 PathProgramCache]: Analyzing trace with hash -840266154, now seen corresponding path program 1 times [2020-10-26 22:38:58,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:38:58,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355703044] [2020-10-26 22:38:58,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:38:58,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:58,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:58,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:59,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:00,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:00,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 403 [2020-10-26 22:39:00,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:39:00,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2249 [2020-10-26 22:39:00,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:00,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:39:00,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 259 [2020-10-26 22:39:00,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-26 22:39:00,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:00,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:39:00,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:00,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:00,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:00,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:39:00,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:00,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 22:39:00,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:00,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:39:00,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:00,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:39:00,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:00,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:39:00,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:00,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:00,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:00,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:39:00,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:00,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 22:39:00,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:00,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:39:00,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:00,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:39:00,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:00,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:39:00,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:00,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:00,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:00,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:39:00,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:00,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-26 22:39:00,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:00,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:39:00,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:00,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-26 22:39:00,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:01,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2020-10-26 22:39:01,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:01,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:01,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:01,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 22:39:01,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:01,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-26 22:39:01,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:01,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:39:01,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:39:01,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-26 22:39:01,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:01,237 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 305 proven. 2 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-10-26 22:39:01,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355703044] [2020-10-26 22:39:01,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:39:01,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:39:01,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003724020] [2020-10-26 22:39:01,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:39:01,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:39:01,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:39:01,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:39:01,240 INFO L87 Difference]: Start difference. First operand 6899 states and 8146 transitions. Second operand 7 states. [2020-10-26 22:39:04,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:39:04,751 INFO L93 Difference]: Finished difference Result 13249 states and 15905 transitions. [2020-10-26 22:39:04,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:39:04,755 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 387 [2020-10-26 22:39:04,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:39:04,794 INFO L225 Difference]: With dead ends: 13249 [2020-10-26 22:39:04,794 INFO L226 Difference]: Without dead ends: 8474 [2020-10-26 22:39:04,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:39:04,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8474 states. [2020-10-26 22:39:04,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8474 to 8259. [2020-10-26 22:39:04,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8259 states. [2020-10-26 22:39:04,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8259 states to 8259 states and 9738 transitions. [2020-10-26 22:39:04,971 INFO L78 Accepts]: Start accepts. Automaton has 8259 states and 9738 transitions. Word has length 387 [2020-10-26 22:39:04,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:39:04,972 INFO L481 AbstractCegarLoop]: Abstraction has 8259 states and 9738 transitions. [2020-10-26 22:39:04,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:39:04,972 INFO L276 IsEmpty]: Start isEmpty. Operand 8259 states and 9738 transitions. [2020-10-26 22:39:04,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2020-10-26 22:39:04,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:39:04,984 INFO L422 BasicCegarLoop]: trace histogram [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, 4, 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, 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, 3, 3, 3, 3, 3, 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, 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] [2020-10-26 22:39:04,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 22:39:04,984 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:39:04,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:39:04,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1840570263, now seen corresponding path program 1 times [2020-10-26 22:39:04,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:39:04,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162041947] [2020-10-26 22:39:04,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:39:05,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:05,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:05,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:05,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:07,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:08,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:08,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 410 [2020-10-26 22:39:08,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 22:39:08,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3358 [2020-10-26 22:39:08,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:08,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 22:39:08,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:39:08,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 354 [2020-10-26 22:39:08,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:08,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:39:08,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:08,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:08,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:08,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:39:08,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:08,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 22:39:08,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:08,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:39:08,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:08,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:39:08,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:08,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:39:08,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:08,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:08,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:08,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:39:08,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:08,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-26 22:39:08,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:08,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 22:39:08,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:39:08,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-26 22:39:08,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:08,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-26 22:39:08,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:08,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:08,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:08,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-26 22:39:08,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:08,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-26 22:39:08,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:08,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:39:08,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:39:08,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-26 22:39:08,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:08,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-10-26 22:39:08,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:08,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:09,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:09,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 22:39:09,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:09,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-10-26 22:39:09,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:09,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:39:09,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:39:09,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-26 22:39:09,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:09,302 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 134 proven. 6 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2020-10-26 22:39:09,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162041947] [2020-10-26 22:39:09,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:39:09,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 22:39:09,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429192833] [2020-10-26 22:39:09,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 22:39:09,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:39:09,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 22:39:09,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-26 22:39:09,304 INFO L87 Difference]: Start difference. First operand 8259 states and 9738 transitions. Second operand 9 states. [2020-10-26 22:39:15,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:39:15,841 INFO L93 Difference]: Finished difference Result 20075 states and 24388 transitions. [2020-10-26 22:39:15,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 22:39:15,842 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 394 [2020-10-26 22:39:15,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:39:15,884 INFO L225 Difference]: With dead ends: 20075 [2020-10-26 22:39:15,884 INFO L226 Difference]: Without dead ends: 13746 [2020-10-26 22:39:15,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2020-10-26 22:39:15,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13746 states. [2020-10-26 22:39:16,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13746 to 12906. [2020-10-26 22:39:16,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12906 states. [2020-10-26 22:39:16,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12906 states to 12906 states and 15258 transitions. [2020-10-26 22:39:16,187 INFO L78 Accepts]: Start accepts. Automaton has 12906 states and 15258 transitions. Word has length 394 [2020-10-26 22:39:16,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:39:16,188 INFO L481 AbstractCegarLoop]: Abstraction has 12906 states and 15258 transitions. [2020-10-26 22:39:16,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 22:39:16,188 INFO L276 IsEmpty]: Start isEmpty. Operand 12906 states and 15258 transitions. [2020-10-26 22:39:16,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-10-26 22:39:16,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:39:16,205 INFO L422 BasicCegarLoop]: trace histogram [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, 4, 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, 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, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:39:16,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 22:39:16,205 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:39:16,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:39:16,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1062659261, now seen corresponding path program 1 times [2020-10-26 22:39:16,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:39:16,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29614697] [2020-10-26 22:39:16,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:39:16,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:16,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:16,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:18,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:18,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 425 [2020-10-26 22:39:18,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:39:18,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2440 [2020-10-26 22:39:18,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:18,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:39:18,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 281 [2020-10-26 22:39:18,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-26 22:39:18,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:18,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:39:18,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:18,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:18,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:18,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:39:18,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:18,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 22:39:18,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:18,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:39:18,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:18,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:39:18,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:18,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:39:18,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:18,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:18,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:18,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:39:18,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:18,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 22:39:18,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:18,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:39:18,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:18,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:39:18,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:18,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-26 22:39:18,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:18,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:19,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:19,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-26 22:39:19,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:19,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-26 22:39:19,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:19,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:39:19,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:19,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 133 [2020-10-26 22:39:19,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:19,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 277 [2020-10-26 22:39:19,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:19,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:19,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:19,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 22:39:19,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:19,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-26 22:39:19,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:19,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:39:19,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:39:19,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-26 22:39:19,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:19,380 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 305 proven. 2 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-10-26 22:39:19,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [29614697] [2020-10-26 22:39:19,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:39:19,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:39:19,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154170465] [2020-10-26 22:39:19,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:39:19,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:39:19,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:39:19,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:39:19,383 INFO L87 Difference]: Start difference. First operand 12906 states and 15258 transitions. Second operand 7 states. [2020-10-26 22:39:24,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:39:24,199 INFO L93 Difference]: Finished difference Result 27798 states and 33084 transitions. [2020-10-26 22:39:24,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:39:24,199 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 409 [2020-10-26 22:39:24,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:39:24,236 INFO L225 Difference]: With dead ends: 27798 [2020-10-26 22:39:24,236 INFO L226 Difference]: Without dead ends: 15276 [2020-10-26 22:39:24,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:39:24,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15276 states. [2020-10-26 22:39:24,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15276 to 15020. [2020-10-26 22:39:24,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15020 states. [2020-10-26 22:39:24,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15020 states to 15020 states and 17546 transitions. [2020-10-26 22:39:24,538 INFO L78 Accepts]: Start accepts. Automaton has 15020 states and 17546 transitions. Word has length 409 [2020-10-26 22:39:24,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:39:24,538 INFO L481 AbstractCegarLoop]: Abstraction has 15020 states and 17546 transitions. [2020-10-26 22:39:24,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:39:24,539 INFO L276 IsEmpty]: Start isEmpty. Operand 15020 states and 17546 transitions. [2020-10-26 22:39:24,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2020-10-26 22:39:24,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:39:24,557 INFO L422 BasicCegarLoop]: trace histogram [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, 4, 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, 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, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:39:24,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 22:39:24,558 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:39:24,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:39:24,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1157308608, now seen corresponding path program 1 times [2020-10-26 22:39:24,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:39:24,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191088568] [2020-10-26 22:39:24,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:39:24,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:24,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:24,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:24,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:25,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:26,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:29,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:29,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 429 [2020-10-26 22:39:29,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 22:39:29,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 22:39:29,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:29,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 22:39:29,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:39:29,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 317 [2020-10-26 22:39:29,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:29,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:39:29,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:29,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:29,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:29,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:39:29,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:29,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 22:39:29,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:29,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:39:29,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:29,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:39:29,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:29,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:39:29,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:29,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:30,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:30,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-26 22:39:30,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:30,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-26 22:39:30,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:30,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:39:30,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:39:30,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-26 22:39:30,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:30,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-10-26 22:39:30,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:30,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:30,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:30,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-26 22:39:30,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:30,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-26 22:39:30,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:30,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 22:39:30,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:39:30,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 22:39:30,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:30,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 249 [2020-10-26 22:39:30,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:30,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:30,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:30,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:30,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 22:39:30,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:39:30,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 266 [2020-10-26 22:39:30,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:30,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 22:39:30,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:39:30,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-26 22:39:30,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:31,752 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 130 proven. 213 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-10-26 22:39:31,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191088568] [2020-10-26 22:39:31,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:39:31,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 22:39:31,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660281435] [2020-10-26 22:39:31,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 22:39:31,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:39:31,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 22:39:31,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-26 22:39:31,754 INFO L87 Difference]: Start difference. First operand 15020 states and 17546 transitions. Second operand 13 states. [2020-10-26 22:39:31,986 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 70 [2020-10-26 22:39:33,101 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 88 [2020-10-26 22:39:33,438 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 91 [2020-10-26 22:39:33,781 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 91 [2020-10-26 22:39:34,415 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 83 [2020-10-26 22:39:35,122 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 80 [2020-10-26 22:39:35,422 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 82 [2020-10-26 22:39:35,816 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 85 [2020-10-26 22:39:36,242 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 85 [2020-10-26 22:39:36,479 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-10-26 22:39:38,215 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 37 [2020-10-26 22:39:39,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:39:39,353 INFO L93 Difference]: Finished difference Result 27455 states and 32163 transitions. [2020-10-26 22:39:39,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 22:39:39,354 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 413 [2020-10-26 22:39:39,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:39:39,390 INFO L225 Difference]: With dead ends: 27455 [2020-10-26 22:39:39,391 INFO L226 Difference]: Without dead ends: 15085 [2020-10-26 22:39:39,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=232, Invalid=760, Unknown=0, NotChecked=0, Total=992 [2020-10-26 22:39:39,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15085 states. [2020-10-26 22:39:39,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15085 to 15024. [2020-10-26 22:39:39,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15024 states. [2020-10-26 22:39:39,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15024 states to 15024 states and 17538 transitions. [2020-10-26 22:39:39,706 INFO L78 Accepts]: Start accepts. Automaton has 15024 states and 17538 transitions. Word has length 413 [2020-10-26 22:39:39,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:39:39,707 INFO L481 AbstractCegarLoop]: Abstraction has 15024 states and 17538 transitions. [2020-10-26 22:39:39,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 22:39:39,707 INFO L276 IsEmpty]: Start isEmpty. Operand 15024 states and 17538 transitions. [2020-10-26 22:39:39,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2020-10-26 22:39:39,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:39:39,729 INFO L422 BasicCegarLoop]: trace histogram [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, 4, 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, 3, 3, 3, 3, 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, 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, 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, 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] [2020-10-26 22:39:39,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 22:39:39,730 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:39:39,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:39:39,730 INFO L82 PathProgramCache]: Analyzing trace with hash -868272850, now seen corresponding path program 1 times [2020-10-26 22:39:39,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:39:39,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470558491] [2020-10-26 22:39:39,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:39:39,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:39,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:40,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:40,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:40,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:42,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:42,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 431 [2020-10-26 22:39:42,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 22:39:42,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3106 [2020-10-26 22:39:42,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:42,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:39:42,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 255 [2020-10-26 22:39:42,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 22:39:42,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:43,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:39:43,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:43,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:43,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:43,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:39:43,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:43,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 22:39:43,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:43,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:39:43,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:43,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:39:43,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:43,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:39:43,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:43,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:43,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:43,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-26 22:39:43,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:43,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-26 22:39:43,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:43,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:39:43,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:43,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:39:43,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:43,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-10-26 22:39:43,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:43,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:43,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:43,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 22:39:43,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:43,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-26 22:39:43,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:43,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:39:43,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:43,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-26 22:39:43,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:43,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2020-10-26 22:39:43,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:43,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:43,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:43,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:43,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 22:39:43,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:39:43,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 251 [2020-10-26 22:39:43,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:43,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:39:43,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:39:43,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-26 22:39:43,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:44,034 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 319 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-26 22:39:44,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470558491] [2020-10-26 22:39:44,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:39:44,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:39:44,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328782894] [2020-10-26 22:39:44,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:39:44,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:39:44,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:39:44,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:39:44,036 INFO L87 Difference]: Start difference. First operand 15024 states and 17538 transitions. Second operand 7 states. [2020-10-26 22:39:45,353 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-26 22:39:46,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:39:46,583 INFO L93 Difference]: Finished difference Result 27415 states and 32100 transitions. [2020-10-26 22:39:46,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 22:39:46,584 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 415 [2020-10-26 22:39:46,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:39:46,620 INFO L225 Difference]: With dead ends: 27415 [2020-10-26 22:39:46,620 INFO L226 Difference]: Without dead ends: 15084 [2020-10-26 22:39:46,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-26 22:39:46,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15084 states. [2020-10-26 22:39:46,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15084 to 15024. [2020-10-26 22:39:46,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15024 states. [2020-10-26 22:39:46,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15024 states to 15024 states and 17527 transitions. [2020-10-26 22:39:46,943 INFO L78 Accepts]: Start accepts. Automaton has 15024 states and 17527 transitions. Word has length 415 [2020-10-26 22:39:46,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:39:46,943 INFO L481 AbstractCegarLoop]: Abstraction has 15024 states and 17527 transitions. [2020-10-26 22:39:46,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:39:46,945 INFO L276 IsEmpty]: Start isEmpty. Operand 15024 states and 17527 transitions. [2020-10-26 22:39:46,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2020-10-26 22:39:46,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:39:46,962 INFO L422 BasicCegarLoop]: trace histogram [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, 4, 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, 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, 3, 3, 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, 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, 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, 1] [2020-10-26 22:39:46,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 22:39:46,962 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:39:46,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:39:46,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1332015124, now seen corresponding path program 1 times [2020-10-26 22:39:46,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:39:46,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415548934] [2020-10-26 22:39:46,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:39:47,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:47,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:47,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:47,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:48,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:48,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:49,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:52,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:52,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 444 [2020-10-26 22:39:52,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 22:39:52,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-26 22:39:52,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:52,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:39:52,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 157 [2020-10-26 22:39:52,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 22:39:52,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:52,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:39:52,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:52,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:52,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:52,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:39:52,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:52,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 22:39:52,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:52,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:39:52,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:52,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:39:52,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:52,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:39:52,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:52,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:52,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:52,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-26 22:39:52,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:52,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-26 22:39:52,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:52,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:39:52,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:52,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-26 22:39:52,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:52,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-10-26 22:39:52,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:52,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:52,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:52,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 22:39:52,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:52,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-26 22:39:52,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:52,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:39:52,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:39:52,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 22:39:52,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:52,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 235 [2020-10-26 22:39:52,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:52,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:52,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:52,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-26 22:39:52,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:52,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-26 22:39:52,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:52,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:39:52,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 149 [2020-10-26 22:39:52,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:39:52,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:52,688 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 207 proven. 79 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-26 22:39:52,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415548934] [2020-10-26 22:39:52,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:39:52,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:39:52,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041502748] [2020-10-26 22:39:52,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:39:52,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:39:52,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:39:52,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:39:52,690 INFO L87 Difference]: Start difference. First operand 15024 states and 17527 transitions. Second operand 7 states. [2020-10-26 22:39:57,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:39:57,460 INFO L93 Difference]: Finished difference Result 32381 states and 38115 transitions. [2020-10-26 22:39:57,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:39:57,462 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 428 [2020-10-26 22:39:57,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:39:57,498 INFO L225 Difference]: With dead ends: 32381 [2020-10-26 22:39:57,499 INFO L226 Difference]: Without dead ends: 17749 [2020-10-26 22:39:57,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:39:57,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17749 states. [2020-10-26 22:39:57,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17749 to 17698. [2020-10-26 22:39:57,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17698 states. [2020-10-26 22:39:57,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17698 states to 17698 states and 20618 transitions. [2020-10-26 22:39:57,849 INFO L78 Accepts]: Start accepts. Automaton has 17698 states and 20618 transitions. Word has length 428 [2020-10-26 22:39:57,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:39:57,850 INFO L481 AbstractCegarLoop]: Abstraction has 17698 states and 20618 transitions. [2020-10-26 22:39:57,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:39:57,850 INFO L276 IsEmpty]: Start isEmpty. Operand 17698 states and 20618 transitions. [2020-10-26 22:39:57,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2020-10-26 22:39:57,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:39:57,869 INFO L422 BasicCegarLoop]: trace histogram [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, 4, 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, 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, 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, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:39:57,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 22:39:57,869 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:39:57,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:39:57,870 INFO L82 PathProgramCache]: Analyzing trace with hash -48699928, now seen corresponding path program 1 times [2020-10-26 22:39:57,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:39:57,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440531134] [2020-10-26 22:39:57,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:39:57,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:58,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:58,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:58,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:01,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:01,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 444 [2020-10-26 22:40:01,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:40:01,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3419 [2020-10-26 22:40:01,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:01,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:40:01,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 157 [2020-10-26 22:40:01,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-26 22:40:01,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:01,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:40:01,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:01,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:01,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:01,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:40:01,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:01,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 22:40:01,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:01,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:40:01,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:40:01,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:40:01,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:01,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:40:01,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:01,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:01,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:01,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-26 22:40:01,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:01,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-26 22:40:01,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:01,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:40:01,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:40:01,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-26 22:40:01,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:01,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-10-26 22:40:01,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:01,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:01,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:01,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-26 22:40:01,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:01,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-26 22:40:01,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:01,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:40:01,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:40:01,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-26 22:40:01,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:01,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 264 [2020-10-26 22:40:01,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:02,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:02,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:02,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 22:40:02,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:02,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-26 22:40:02,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:02,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:40:02,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 120 [2020-10-26 22:40:02,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:40:02,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:02,333 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 236 proven. 108 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2020-10-26 22:40:02,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440531134] [2020-10-26 22:40:02,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:40:02,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:40:02,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141072028] [2020-10-26 22:40:02,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:40:02,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:40:02,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:40:02,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:40:02,336 INFO L87 Difference]: Start difference. First operand 17698 states and 20618 transitions. Second operand 7 states. [2020-10-26 22:40:06,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:40:06,279 INFO L93 Difference]: Finished difference Result 33509 states and 39103 transitions. [2020-10-26 22:40:06,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 22:40:06,281 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 428 [2020-10-26 22:40:06,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:40:06,325 INFO L225 Difference]: With dead ends: 33509 [2020-10-26 22:40:06,325 INFO L226 Difference]: Without dead ends: 19277 [2020-10-26 22:40:06,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-26 22:40:06,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19277 states. [2020-10-26 22:40:06,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19277 to 18650. [2020-10-26 22:40:06,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18650 states. [2020-10-26 22:40:06,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18650 states to 18650 states and 21666 transitions. [2020-10-26 22:40:06,699 INFO L78 Accepts]: Start accepts. Automaton has 18650 states and 21666 transitions. Word has length 428 [2020-10-26 22:40:06,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:40:06,699 INFO L481 AbstractCegarLoop]: Abstraction has 18650 states and 21666 transitions. [2020-10-26 22:40:06,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:40:06,699 INFO L276 IsEmpty]: Start isEmpty. Operand 18650 states and 21666 transitions. [2020-10-26 22:40:06,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2020-10-26 22:40:06,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:40:06,718 INFO L422 BasicCegarLoop]: trace histogram [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, 4, 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, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:40:06,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 22:40:06,719 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:40:06,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:40:06,719 INFO L82 PathProgramCache]: Analyzing trace with hash -417206834, now seen corresponding path program 1 times [2020-10-26 22:40:06,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:40:06,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1634712292] [2020-10-26 22:40:06,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:40:06,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:06,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:06,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:07,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:07,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:09,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:09,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 463 [2020-10-26 22:40:09,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 22:40:09,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2708 [2020-10-26 22:40:09,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:09,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:40:09,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 258 [2020-10-26 22:40:09,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 22:40:09,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:09,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:40:09,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:09,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:09,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:09,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:40:09,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:09,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 22:40:09,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:09,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:40:09,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:40:09,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:40:09,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:09,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:40:09,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:09,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:09,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:09,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:40:09,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:09,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-26 22:40:09,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:09,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:40:09,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:40:09,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:40:09,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:09,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:40:09,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:09,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:10,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:10,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-26 22:40:10,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:10,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-26 22:40:10,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:10,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:40:10,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:40:10,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-26 22:40:10,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:10,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 254 [2020-10-26 22:40:10,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:10,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:10,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:10,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:10,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-26 22:40:10,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:40:10,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 334 [2020-10-26 22:40:10,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:10,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:40:10,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:40:10,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 152 [2020-10-26 22:40:10,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:11,483 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 371 proven. 2 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-10-26 22:40:11,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1634712292] [2020-10-26 22:40:11,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:40:11,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:40:11,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649062947] [2020-10-26 22:40:11,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:40:11,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:40:11,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:40:11,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:40:11,485 INFO L87 Difference]: Start difference. First operand 18650 states and 21666 transitions. Second operand 7 states. [2020-10-26 22:40:11,669 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 22:40:12,923 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-10-26 22:40:13,074 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-10-26 22:40:14,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:40:14,430 INFO L93 Difference]: Finished difference Result 33899 states and 39514 transitions. [2020-10-26 22:40:14,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 22:40:14,433 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 447 [2020-10-26 22:40:14,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:40:14,476 INFO L225 Difference]: With dead ends: 33899 [2020-10-26 22:40:14,477 INFO L226 Difference]: Without dead ends: 18711 [2020-10-26 22:40:14,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-26 22:40:14,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18711 states. [2020-10-26 22:40:14,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18711 to 18648. [2020-10-26 22:40:14,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18648 states. [2020-10-26 22:40:14,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18648 states to 18648 states and 21641 transitions. [2020-10-26 22:40:14,850 INFO L78 Accepts]: Start accepts. Automaton has 18648 states and 21641 transitions. Word has length 447 [2020-10-26 22:40:14,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:40:14,850 INFO L481 AbstractCegarLoop]: Abstraction has 18648 states and 21641 transitions. [2020-10-26 22:40:14,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:40:14,850 INFO L276 IsEmpty]: Start isEmpty. Operand 18648 states and 21641 transitions. [2020-10-26 22:40:14,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2020-10-26 22:40:14,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:40:14,864 INFO L422 BasicCegarLoop]: trace histogram [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, 4, 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, 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, 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, 3, 3, 3, 3, 3, 3, 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, 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] [2020-10-26 22:40:14,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 22:40:14,865 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:40:14,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:40:14,867 INFO L82 PathProgramCache]: Analyzing trace with hash -520372250, now seen corresponding path program 1 times [2020-10-26 22:40:14,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:40:14,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144818138] [2020-10-26 22:40:14,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:40:14,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:14,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:15,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:15,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:16,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:20,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:20,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 468 [2020-10-26 22:40:20,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 22:40:20,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5111 [2020-10-26 22:40:20,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:20,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 22:40:20,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:40:20,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 288 [2020-10-26 22:40:20,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:20,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:40:20,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:20,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:20,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:20,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:40:20,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:20,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 22:40:20,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:20,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:40:20,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:40:20,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:40:20,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:20,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:40:20,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:20,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:20,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:20,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-26 22:40:20,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:20,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-26 22:40:20,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:20,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:40:20,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:40:20,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 172 [2020-10-26 22:40:20,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:20,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-10-26 22:40:20,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:20,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:20,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:20,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-26 22:40:20,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:20,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-26 22:40:20,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:20,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:40:20,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:40:20,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-26 22:40:20,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:20,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 288 [2020-10-26 22:40:20,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:20,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:21,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:21,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 22:40:21,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:21,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-26 22:40:21,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:21,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:40:21,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 120 [2020-10-26 22:40:21,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:40:21,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:21,615 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 131 proven. 325 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-26 22:40:21,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144818138] [2020-10-26 22:40:21,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:40:21,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 22:40:21,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119147294] [2020-10-26 22:40:21,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 22:40:21,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:40:21,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 22:40:21,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:40:21,617 INFO L87 Difference]: Start difference. First operand 18648 states and 21641 transitions. Second operand 8 states. [2020-10-26 22:40:21,797 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-26 22:40:25,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:40:25,097 INFO L93 Difference]: Finished difference Result 33877 states and 39425 transitions. [2020-10-26 22:40:25,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 22:40:25,099 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 452 [2020-10-26 22:40:25,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:40:25,131 INFO L225 Difference]: With dead ends: 33877 [2020-10-26 22:40:25,132 INFO L226 Difference]: Without dead ends: 18697 [2020-10-26 22:40:25,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-26 22:40:25,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18697 states. [2020-10-26 22:40:25,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18697 to 18640. [2020-10-26 22:40:25,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18640 states. [2020-10-26 22:40:25,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18640 states to 18640 states and 21629 transitions. [2020-10-26 22:40:25,451 INFO L78 Accepts]: Start accepts. Automaton has 18640 states and 21629 transitions. Word has length 452 [2020-10-26 22:40:25,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:40:25,451 INFO L481 AbstractCegarLoop]: Abstraction has 18640 states and 21629 transitions. [2020-10-26 22:40:25,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 22:40:25,452 INFO L276 IsEmpty]: Start isEmpty. Operand 18640 states and 21629 transitions. [2020-10-26 22:40:25,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2020-10-26 22:40:25,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:40:25,467 INFO L422 BasicCegarLoop]: trace histogram [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, 5, 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, 4, 4, 4, 4, 4, 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, 3, 3, 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, 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] [2020-10-26 22:40:25,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 22:40:25,468 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:40:25,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:40:25,471 INFO L82 PathProgramCache]: Analyzing trace with hash -2040591444, now seen corresponding path program 1 times [2020-10-26 22:40:25,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:40:25,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584312096] [2020-10-26 22:40:25,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:40:25,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:25,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:25,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:25,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:25,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:27,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:30,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:30,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 475 [2020-10-26 22:40:30,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 22:40:30,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 22:40:30,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:30,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:40:30,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 224 [2020-10-26 22:40:30,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 22:40:30,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:30,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:40:30,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:30,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:30,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:30,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:40:30,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:30,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 22:40:30,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:30,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:40:30,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:40:30,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:40:30,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:30,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:40:30,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:30,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:30,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:30,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-26 22:40:30,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:30,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 22:40:30,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:30,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:40:30,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:40:30,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:40:30,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:30,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-10-26 22:40:30,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:30,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:30,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:30,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-26 22:40:30,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:30,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-26 22:40:30,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:30,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:40:30,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:40:30,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 22:40:30,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:30,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2020-10-26 22:40:30,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:30,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:30,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:30,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-26 22:40:30,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:30,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-26 22:40:30,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:30,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:40:30,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:40:30,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 22:40:30,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:31,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2020-10-26 22:40:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:31,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:31,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:31,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 22:40:31,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:31,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-10-26 22:40:31,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:31,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:40:31,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 120 [2020-10-26 22:40:31,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:40:31,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:31,403 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 321 proven. 72 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-10-26 22:40:31,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584312096] [2020-10-26 22:40:31,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:40:31,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:40:31,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451911827] [2020-10-26 22:40:31,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:40:31,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:40:31,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:40:31,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:40:31,405 INFO L87 Difference]: Start difference. First operand 18640 states and 21629 transitions. Second operand 7 states. [2020-10-26 22:40:34,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:40:34,727 INFO L93 Difference]: Finished difference Result 33866 states and 39403 transitions. [2020-10-26 22:40:34,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:40:34,728 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 457 [2020-10-26 22:40:34,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:40:34,758 INFO L225 Difference]: With dead ends: 33866 [2020-10-26 22:40:34,758 INFO L226 Difference]: Without dead ends: 18694 [2020-10-26 22:40:34,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-26 22:40:34,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18694 states. [2020-10-26 22:40:35,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18694 to 18452. [2020-10-26 22:40:35,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18452 states. [2020-10-26 22:40:35,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18452 states to 18452 states and 21394 transitions. [2020-10-26 22:40:35,082 INFO L78 Accepts]: Start accepts. Automaton has 18452 states and 21394 transitions. Word has length 457 [2020-10-26 22:40:35,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:40:35,082 INFO L481 AbstractCegarLoop]: Abstraction has 18452 states and 21394 transitions. [2020-10-26 22:40:35,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:40:35,082 INFO L276 IsEmpty]: Start isEmpty. Operand 18452 states and 21394 transitions. [2020-10-26 22:40:35,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2020-10-26 22:40:35,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:40:35,095 INFO L422 BasicCegarLoop]: trace histogram [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, 4, 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, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:40:35,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 22:40:35,095 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:40:35,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:40:35,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1948169817, now seen corresponding path program 1 times [2020-10-26 22:40:35,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:40:35,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294495304] [2020-10-26 22:40:35,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:40:35,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:35,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:35,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:35,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:35,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:35,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:36,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:36,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:36,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 478 [2020-10-26 22:40:36,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 22:40:36,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1538 [2020-10-26 22:40:36,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:36,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:40:36,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:40:36,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 297 [2020-10-26 22:40:36,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:36,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:40:36,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:36,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:36,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:36,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:40:36,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:36,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 22:40:36,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:36,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:40:36,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:40:36,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:40:36,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:36,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:40:36,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:36,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:36,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:37,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:37,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:40:37,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:40:37,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-26 22:40:37,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:37,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:40:37,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:40:37,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-26 22:40:37,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:37,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-26 22:40:37,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:37,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:37,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:37,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:37,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-26 22:40:37,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:40:37,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-26 22:40:37,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:37,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:40:37,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 152 [2020-10-26 22:40:37,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:40:37,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:37,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 298 [2020-10-26 22:40:37,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:37,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:37,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:37,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 22:40:37,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:37,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-26 22:40:37,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:37,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:40:37,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 120 [2020-10-26 22:40:37,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:40:37,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:37,495 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 133 proven. 4 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2020-10-26 22:40:37,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294495304] [2020-10-26 22:40:37,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:40:37,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 22:40:37,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762755517] [2020-10-26 22:40:37,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 22:40:37,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:40:37,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 22:40:37,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:40:37,497 INFO L87 Difference]: Start difference. First operand 18452 states and 21394 transitions. Second operand 5 states. [2020-10-26 22:40:39,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:40:39,261 INFO L93 Difference]: Finished difference Result 32687 states and 37906 transitions. [2020-10-26 22:40:39,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:40:39,262 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 462 [2020-10-26 22:40:39,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:40:39,300 INFO L225 Difference]: With dead ends: 32687 [2020-10-26 22:40:39,300 INFO L226 Difference]: Without dead ends: 17703 [2020-10-26 22:40:39,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:40:39,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17703 states. [2020-10-26 22:40:39,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17703 to 17645. [2020-10-26 22:40:39,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17645 states. [2020-10-26 22:40:39,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17645 states to 17645 states and 20310 transitions. [2020-10-26 22:40:39,607 INFO L78 Accepts]: Start accepts. Automaton has 17645 states and 20310 transitions. Word has length 462 [2020-10-26 22:40:39,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:40:39,607 INFO L481 AbstractCegarLoop]: Abstraction has 17645 states and 20310 transitions. [2020-10-26 22:40:39,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 22:40:39,607 INFO L276 IsEmpty]: Start isEmpty. Operand 17645 states and 20310 transitions. [2020-10-26 22:40:39,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2020-10-26 22:40:39,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:40:39,623 INFO L422 BasicCegarLoop]: trace histogram [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, 5, 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, 4, 4, 4, 4, 4, 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, 3, 3, 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, 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] [2020-10-26 22:40:39,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 22:40:39,623 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:40:39,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:40:39,623 INFO L82 PathProgramCache]: Analyzing trace with hash 2033858188, now seen corresponding path program 1 times [2020-10-26 22:40:39,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:40:39,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449733551] [2020-10-26 22:40:39,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:40:39,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:39,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:39,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:40,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:40,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:40,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:40,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:40,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:44,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:44,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 490 [2020-10-26 22:40:44,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 22:40:44,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-26 22:40:44,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:44,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 22:40:44,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:40:44,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 322 [2020-10-26 22:40:44,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:44,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:40:44,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:44,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:44,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:44,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:40:44,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:44,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 22:40:44,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:44,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:40:44,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:40:44,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:40:44,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:44,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:40:44,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:45,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:45,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:45,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:45,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-26 22:40:45,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:40:45,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-26 22:40:45,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:45,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:40:45,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:40:45,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-26 22:40:45,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:45,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-10-26 22:40:45,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:45,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:45,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:45,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:45,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-26 22:40:45,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:40:45,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-26 22:40:45,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:45,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:40:45,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:40:45,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-26 22:40:45,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:45,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 235 [2020-10-26 22:40:45,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:45,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:45,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:45,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-26 22:40:45,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:45,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-26 22:40:45,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:45,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 22:40:45,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:40:45,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 22:40:45,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:45,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 308 [2020-10-26 22:40:45,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:45,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:45,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:45,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:45,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 22:40:45,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:40:45,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 347 [2020-10-26 22:40:45,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:45,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:40:45,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:40:45,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-26 22:40:45,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:46,918 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 323 proven. 276 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-10-26 22:40:46,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449733551] [2020-10-26 22:40:46,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:40:46,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 22:40:46,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091719499] [2020-10-26 22:40:46,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 22:40:46,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:40:46,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 22:40:46,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-26 22:40:46,921 INFO L87 Difference]: Start difference. First operand 17645 states and 20310 transitions. Second operand 10 states. [2020-10-26 22:40:47,299 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-26 22:40:48,257 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-10-26 22:40:49,425 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-10-26 22:40:49,797 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 70 [2020-10-26 22:40:50,062 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2020-10-26 22:40:50,419 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2020-10-26 22:40:50,949 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-10-26 22:40:51,106 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-26 22:40:52,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:40:52,179 INFO L93 Difference]: Finished difference Result 32285 states and 37784 transitions. [2020-10-26 22:40:52,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 22:40:52,181 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 472 [2020-10-26 22:40:52,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:40:52,212 INFO L225 Difference]: With dead ends: 32285 [2020-10-26 22:40:52,213 INFO L226 Difference]: Without dead ends: 18054 [2020-10-26 22:40:52,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2020-10-26 22:40:52,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18054 states. [2020-10-26 22:40:52,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18054 to 17661. [2020-10-26 22:40:52,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17661 states. [2020-10-26 22:40:52,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17661 states to 17661 states and 20270 transitions. [2020-10-26 22:40:52,486 INFO L78 Accepts]: Start accepts. Automaton has 17661 states and 20270 transitions. Word has length 472 [2020-10-26 22:40:52,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:40:52,487 INFO L481 AbstractCegarLoop]: Abstraction has 17661 states and 20270 transitions. [2020-10-26 22:40:52,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 22:40:52,487 INFO L276 IsEmpty]: Start isEmpty. Operand 17661 states and 20270 transitions. [2020-10-26 22:40:52,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-10-26 22:40:52,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:40:52,500 INFO L422 BasicCegarLoop]: trace histogram [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, 4, 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, 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, 3, 3, 3, 3, 3, 3, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:40:52,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 22:40:52,500 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:40:52,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:40:52,501 INFO L82 PathProgramCache]: Analyzing trace with hash 296153026, now seen corresponding path program 1 times [2020-10-26 22:40:52,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:40:52,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1423163622] [2020-10-26 22:40:52,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:40:52,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:52,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:52,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:54,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:54,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 491 [2020-10-26 22:40:54,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:40:54,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1443 [2020-10-26 22:40:54,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:54,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:40:54,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 338 [2020-10-26 22:40:54,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-26 22:40:54,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:54,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:40:54,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:54,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:54,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:54,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:40:54,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:54,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 22:40:54,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:54,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:40:54,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:40:54,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:40:54,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:54,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:40:54,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:54,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:54,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:54,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-26 22:40:54,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:54,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-26 22:40:54,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:54,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:40:54,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:40:54,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:40:54,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:54,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-10-26 22:40:54,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:54,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:54,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:54,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-26 22:40:54,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:54,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-26 22:40:54,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:54,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:40:54,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:40:54,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 150 [2020-10-26 22:40:54,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:54,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 334 [2020-10-26 22:40:54,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:54,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:54,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:54,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-26 22:40:54,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:54,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-26 22:40:54,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:54,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:40:54,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:40:54,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-26 22:40:54,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:54,770 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 323 proven. 2 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2020-10-26 22:40:54,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1423163622] [2020-10-26 22:40:54,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:40:54,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:40:54,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853175849] [2020-10-26 22:40:54,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:40:54,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:40:54,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:40:54,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:40:54,772 INFO L87 Difference]: Start difference. First operand 17661 states and 20270 transitions. Second operand 7 states. [2020-10-26 22:40:58,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:40:58,761 INFO L93 Difference]: Finished difference Result 38244 states and 44292 transitions. [2020-10-26 22:40:58,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:40:58,762 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 475 [2020-10-26 22:40:58,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:40:58,795 INFO L225 Difference]: With dead ends: 38244 [2020-10-26 22:40:58,795 INFO L226 Difference]: Without dead ends: 20967 [2020-10-26 22:40:58,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:40:58,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20967 states. [2020-10-26 22:40:59,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20967 to 20529. [2020-10-26 22:40:59,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20529 states. [2020-10-26 22:40:59,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20529 states to 20529 states and 23707 transitions. [2020-10-26 22:40:59,091 INFO L78 Accepts]: Start accepts. Automaton has 20529 states and 23707 transitions. Word has length 475 [2020-10-26 22:40:59,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:40:59,092 INFO L481 AbstractCegarLoop]: Abstraction has 20529 states and 23707 transitions. [2020-10-26 22:40:59,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:40:59,092 INFO L276 IsEmpty]: Start isEmpty. Operand 20529 states and 23707 transitions. [2020-10-26 22:40:59,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-10-26 22:40:59,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:40:59,106 INFO L422 BasicCegarLoop]: trace histogram [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, 4, 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, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:40:59,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 22:40:59,106 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:40:59,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:40:59,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1522436249, now seen corresponding path program 1 times [2020-10-26 22:40:59,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:40:59,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784857733] [2020-10-26 22:40:59,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:40:59,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:59,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:59,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:59,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:01,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:01,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 494 [2020-10-26 22:41:01,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:41:01,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2112 [2020-10-26 22:41:01,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:01,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:41:01,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 317 [2020-10-26 22:41:01,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-26 22:41:01,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:01,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:41:01,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:01,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:01,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:01,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:41:01,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:01,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 22:41:01,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:01,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:41:01,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:41:01,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:41:01,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:01,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:41:01,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:01,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:01,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:01,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:41:01,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:01,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-26 22:41:01,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:01,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:41:01,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:41:01,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:41:01,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:01,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-26 22:41:01,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:01,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:01,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:01,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-26 22:41:01,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:01,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-26 22:41:01,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:01,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:41:01,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:41:01,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 169 [2020-10-26 22:41:01,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:01,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 314 [2020-10-26 22:41:01,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:01,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:01,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:01,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 22:41:01,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:01,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-26 22:41:01,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:01,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:41:01,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:41:01,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-26 22:41:01,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:02,101 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 369 proven. 2 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-10-26 22:41:02,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784857733] [2020-10-26 22:41:02,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:41:02,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:41:02,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184054801] [2020-10-26 22:41:02,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:41:02,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:41:02,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:41:02,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:41:02,103 INFO L87 Difference]: Start difference. First operand 20529 states and 23707 transitions. Second operand 7 states. [2020-10-26 22:41:05,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:41:05,712 INFO L93 Difference]: Finished difference Result 38810 states and 44947 transitions. [2020-10-26 22:41:05,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:41:05,713 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 478 [2020-10-26 22:41:05,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:41:05,748 INFO L225 Difference]: With dead ends: 38810 [2020-10-26 22:41:05,749 INFO L226 Difference]: Without dead ends: 21937 [2020-10-26 22:41:05,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:41:05,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21937 states. [2020-10-26 22:41:05,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21937 to 21493. [2020-10-26 22:41:05,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21493 states. [2020-10-26 22:41:06,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21493 states to 21493 states and 24839 transitions. [2020-10-26 22:41:06,028 INFO L78 Accepts]: Start accepts. Automaton has 21493 states and 24839 transitions. Word has length 478 [2020-10-26 22:41:06,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:41:06,028 INFO L481 AbstractCegarLoop]: Abstraction has 21493 states and 24839 transitions. [2020-10-26 22:41:06,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:41:06,028 INFO L276 IsEmpty]: Start isEmpty. Operand 21493 states and 24839 transitions. [2020-10-26 22:41:06,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-10-26 22:41:06,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:41:06,040 INFO L422 BasicCegarLoop]: trace histogram [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, 4, 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, 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, 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, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:41:06,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 22:41:06,040 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:41:06,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:41:06,040 INFO L82 PathProgramCache]: Analyzing trace with hash -2019558077, now seen corresponding path program 1 times [2020-10-26 22:41:06,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:41:06,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234699684] [2020-10-26 22:41:06,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:41:06,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:06,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:06,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:06,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 500 [2020-10-26 22:41:06,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:06,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 785 [2020-10-26 22:41:06,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:06,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:41:06,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 448 [2020-10-26 22:41:06,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 22:41:06,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:07,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:41:07,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:07,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:07,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:07,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:41:07,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:07,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 22:41:07,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:07,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:41:07,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:41:07,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:41:07,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:07,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:41:07,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:07,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:07,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:07,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-26 22:41:07,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:07,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-26 22:41:07,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:07,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:41:07,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:41:07,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:41:07,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:07,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-10-26 22:41:07,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:07,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:07,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:07,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-26 22:41:07,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:07,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 22:41:07,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:07,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:41:07,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:41:07,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:41:07,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:07,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 334 [2020-10-26 22:41:07,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:07,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:07,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:07,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-26 22:41:07,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:07,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-26 22:41:07,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:07,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:41:07,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:41:07,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-26 22:41:07,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:07,603 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 129 proven. 3 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2020-10-26 22:41:07,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234699684] [2020-10-26 22:41:07,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:41:07,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 22:41:07,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455067939] [2020-10-26 22:41:07,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 22:41:07,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:41:07,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 22:41:07,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:41:07,604 INFO L87 Difference]: Start difference. First operand 21493 states and 24839 transitions. Second operand 5 states.