/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-crafted/zero_sum5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:06:15,371 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:06:15,375 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:06:15,411 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:06:15,412 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:06:15,414 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:06:15,415 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:06:15,418 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:06:15,420 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:06:15,422 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:06:15,423 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:06:15,426 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:06:15,427 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:06:15,433 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:06:15,435 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:06:15,436 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:06:15,440 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:06:15,442 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:06:15,464 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:06:15,469 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:06:15,472 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:06:15,475 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:06:15,477 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:06:15,480 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:06:15,495 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:06:15,496 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:06:15,498 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:06:15,500 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:06:15,501 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:06:15,503 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:06:15,504 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:06:15,505 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:06:15,506 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:06:15,508 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:06:15,510 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:06:15,511 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:06:15,512 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:06:15,512 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:06:15,512 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:06:15,515 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:06:15,516 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:06:15,518 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 19:06:15,546 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:06:15,547 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:06:15,549 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:06:15,549 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:06:15,549 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:06:15,550 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:06:15,550 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:06:15,550 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:06:15,550 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:06:15,551 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:06:15,551 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:06:15,551 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:06:15,552 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:06:15,552 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:06:15,552 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:06:15,553 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:06:15,553 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:06:15,553 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:06:15,554 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:06:15,554 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:06:15,554 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:06:15,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:06:15,555 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:06:15,555 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:06:15,555 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:06:15,556 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:06:15,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:06:15,556 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:06:15,557 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:06:15,557 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:06:15,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:06:16,047 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:06:16,050 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:06:16,052 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:06:16,053 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:06:16,054 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum5.c [2020-10-26 19:06:16,148 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a7733d722/ee69251a92884e4cb50c4281aa5bf0a6/FLAGcf2da1793 [2020-10-26 19:06:16,874 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:06:16,874 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum5.c [2020-10-26 19:06:16,884 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a7733d722/ee69251a92884e4cb50c4281aa5bf0a6/FLAGcf2da1793 [2020-10-26 19:06:17,183 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a7733d722/ee69251a92884e4cb50c4281aa5bf0a6 [2020-10-26 19:06:17,186 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:06:17,195 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:06:17,197 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:06:17,197 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:06:17,204 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:06:17,206 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:06:17" (1/1) ... [2020-10-26 19:06:17,211 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1240fbe6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:06:17, skipping insertion in model container [2020-10-26 19:06:17,211 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:06:17" (1/1) ... [2020-10-26 19:06:17,221 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:06:17,246 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:06:17,442 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:06:17,451 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:06:17,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:06:17,498 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:06:17,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:06:17 WrapperNode [2020-10-26 19:06:17,499 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:06:17,500 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:06:17,500 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:06:17,500 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:06:17,515 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:06:17" (1/1) ... [2020-10-26 19:06:17,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:06:17" (1/1) ... [2020-10-26 19:06:17,525 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:06:17" (1/1) ... [2020-10-26 19:06:17,525 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:06:17" (1/1) ... [2020-10-26 19:06:17,546 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:06:17" (1/1) ... [2020-10-26 19:06:17,559 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:06:17" (1/1) ... [2020-10-26 19:06:17,562 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:06:17" (1/1) ... [2020-10-26 19:06:17,565 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:06:17,572 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:06:17,572 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:06:17,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:06:17,574 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:06:17" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:06:17,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:06:17,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:06:17,656 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:06:17,657 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-26 19:06:17,657 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:06:17,657 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:06:17,657 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:06:17,657 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:06:17,657 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:06:17,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:06:17,658 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-26 19:06:17,658 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:06:17,658 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2020-10-26 19:06:17,658 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:06:17,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:06:17,659 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:06:17,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:06:17,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:06:17,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:06:17,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:06:18,408 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:06:18,409 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-26 19:06:18,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:06:18 BoogieIcfgContainer [2020-10-26 19:06:18,411 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:06:18,415 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:06:18,416 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:06:18,420 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:06:18,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:06:17" (1/3) ... [2020-10-26 19:06:18,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3914a016 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:06:18, skipping insertion in model container [2020-10-26 19:06:18,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:06:17" (2/3) ... [2020-10-26 19:06:18,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3914a016 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:06:18, skipping insertion in model container [2020-10-26 19:06:18,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:06:18" (3/3) ... [2020-10-26 19:06:18,426 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum5.c [2020-10-26 19:06:18,442 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:06:18,449 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:06:18,467 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:06:18,512 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:06:18,512 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:06:18,512 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:06:18,512 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:06:18,513 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:06:18,513 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:06:18,513 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:06:18,513 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:06:18,533 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-10-26 19:06:18,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 19:06:18,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:06:18,541 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] [2020-10-26 19:06:18,542 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:06:18,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:06:18,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1682014752, now seen corresponding path program 1 times [2020-10-26 19:06:18,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:06:18,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [386258212] [2020-10-26 19:06:18,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:06:18,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:18,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:18,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:18,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:18,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:18,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:19,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:19,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:19,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:19,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:19,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:19,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:21,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:23,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:23,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 19:06:23,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-26 19:06:23,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:06:23,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:23,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:06:23,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:06:23,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:06:23,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:06:23,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:06:23,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:23,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:23,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:23,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:06:23,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:06:23,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:06:23,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:23,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:06:23,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:06:23,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:06:23,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:23,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:06:23,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [386258212] [2020-10-26 19:06:23,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:06:23,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 19:06:23,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635803331] [2020-10-26 19:06:23,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:06:23,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:06:23,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:06:23,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:06:23,863 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 5 states. [2020-10-26 19:06:24,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:06:24,288 INFO L93 Difference]: Finished difference Result 125 states and 189 transitions. [2020-10-26 19:06:24,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:06:24,292 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-10-26 19:06:24,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:06:24,313 INFO L225 Difference]: With dead ends: 125 [2020-10-26 19:06:24,314 INFO L226 Difference]: Without dead ends: 65 [2020-10-26 19:06:24,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:06:24,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-26 19:06:24,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2020-10-26 19:06:24,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-26 19:06:24,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2020-10-26 19:06:24,402 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 33 [2020-10-26 19:06:24,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:06:24,402 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2020-10-26 19:06:24,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:06:24,403 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2020-10-26 19:06:24,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:06:24,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:06:24,408 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, 1, 1, 1] [2020-10-26 19:06:24,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:06:24,409 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:06:24,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:06:24,410 INFO L82 PathProgramCache]: Analyzing trace with hash 419710214, now seen corresponding path program 1 times [2020-10-26 19:06:24,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:06:24,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055235448] [2020-10-26 19:06:24,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:06:24,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:24,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:24,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:24,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:24,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:24,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:24,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:24,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:24,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:27,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:29,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:29,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:06:29,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-26 19:06:29,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:06:29,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:29,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:06:29,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:06:29,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:06:29,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-26 19:06:29,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:06:29,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:29,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:29,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:29,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:06:29,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:06:29,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:06:29,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:29,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:06:29,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:06:29,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:06:29,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:29,575 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-26 19:06:29,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055235448] [2020-10-26 19:06:29,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:06:29,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:06:29,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670580466] [2020-10-26 19:06:29,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:06:29,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:06:29,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:06:29,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:06:29,594 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand 6 states. [2020-10-26 19:06:29,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:06:29,984 INFO L93 Difference]: Finished difference Result 117 states and 145 transitions. [2020-10-26 19:06:29,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:06:29,985 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-10-26 19:06:29,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:06:29,987 INFO L225 Difference]: With dead ends: 117 [2020-10-26 19:06:29,987 INFO L226 Difference]: Without dead ends: 75 [2020-10-26 19:06:29,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:06:29,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-26 19:06:30,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-26 19:06:30,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-26 19:06:30,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2020-10-26 19:06:30,016 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 53 [2020-10-26 19:06:30,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:06:30,017 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2020-10-26 19:06:30,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:06:30,018 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2020-10-26 19:06:30,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-26 19:06:30,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:06:30,024 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:06:30,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:06:30,025 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:06:30,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:06:30,030 INFO L82 PathProgramCache]: Analyzing trace with hash -408227750, now seen corresponding path program 2 times [2020-10-26 19:06:30,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:06:30,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070956676] [2020-10-26 19:06:30,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:06:30,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:30,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:30,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:31,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:32,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:34,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:35,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:35,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 19:06:35,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:06:35,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5785 [2020-10-26 19:06:35,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:35,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-26 19:06:35,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:06:35,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-26 19:06:35,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:06:36,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:06:36,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:36,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:36,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:36,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:06:36,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:06:36,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:06:36,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:36,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:06:36,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:06:36,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:06:36,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:36,946 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:06:36,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070956676] [2020-10-26 19:06:36,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:06:36,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:06:36,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298670797] [2020-10-26 19:06:36,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:06:36,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:06:36,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:06:36,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:06:36,949 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand 19 states. [2020-10-26 19:06:38,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:06:38,091 INFO L93 Difference]: Finished difference Result 137 states and 156 transitions. [2020-10-26 19:06:38,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:06:38,092 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 73 [2020-10-26 19:06:38,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:06:38,094 INFO L225 Difference]: With dead ends: 137 [2020-10-26 19:06:38,095 INFO L226 Difference]: Without dead ends: 131 [2020-10-26 19:06:38,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:06:38,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-26 19:06:38,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2020-10-26 19:06:38,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-26 19:06:38,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 147 transitions. [2020-10-26 19:06:38,115 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 147 transitions. Word has length 73 [2020-10-26 19:06:38,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:06:38,116 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 147 transitions. [2020-10-26 19:06:38,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:06:38,117 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 147 transitions. [2020-10-26 19:06:38,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-26 19:06:38,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:06:38,119 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:06:38,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:06:38,119 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:06:38,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:06:38,120 INFO L82 PathProgramCache]: Analyzing trace with hash -465093092, now seen corresponding path program 3 times [2020-10-26 19:06:38,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:06:38,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615035607] [2020-10-26 19:06:38,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:06:38,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:38,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:38,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:38,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:38,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:38,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:38,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:38,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:41,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:43,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:43,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-26 19:06:43,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:06:43,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:06:43,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:43,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:06:43,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:06:43,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:06:43,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:43,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:06:43,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:43,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:43,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:43,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:06:43,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:06:43,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:06:43,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:43,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:06:43,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:06:43,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:06:43,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:06:43,246 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-26 19:06:43,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615035607] [2020-10-26 19:06:43,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:06:43,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:06:43,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52661843] [2020-10-26 19:06:43,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:06:43,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:06:43,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:06:43,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:06:43,249 INFO L87 Difference]: Start difference. First operand 128 states and 147 transitions. Second operand 4 states. [2020-10-26 19:06:43,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:06:43,390 INFO L93 Difference]: Finished difference Result 249 states and 287 transitions. [2020-10-26 19:06:43,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:06:43,390 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-10-26 19:06:43,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:06:43,392 INFO L225 Difference]: With dead ends: 249 [2020-10-26 19:06:43,392 INFO L226 Difference]: Without dead ends: 130 [2020-10-26 19:06:43,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:06:43,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-26 19:06:43,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2020-10-26 19:06:43,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-26 19:06:43,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 148 transitions. [2020-10-26 19:06:43,409 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 148 transitions. Word has length 75 [2020-10-26 19:06:43,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:06:43,410 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 148 transitions. [2020-10-26 19:06:43,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:06:43,410 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 148 transitions. [2020-10-26 19:06:43,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-26 19:06:43,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:06:43,412 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:06:43,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:06:43,413 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:06:43,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:06:43,413 INFO L82 PathProgramCache]: Analyzing trace with hash -269399394, now seen corresponding path program 1 times [2020-10-26 19:06:43,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:06:43,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023959742] [2020-10-26 19:06:43,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:06:43,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:43,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:43,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:43,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:43,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:43,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:43,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:46,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:48,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:48,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-26 19:06:48,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:06:48,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:06:48,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:48,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:06:48,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:06:48,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:06:48,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:48,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:06:48,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:48,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:48,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:48,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:06:48,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:06:48,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:06:48,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:48,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:06:48,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:06:48,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:06:48,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:48,563 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-26 19:06:48,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023959742] [2020-10-26 19:06:48,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:06:48,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:06:48,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321488051] [2020-10-26 19:06:48,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:06:48,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:06:48,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:06:48,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:06:48,568 INFO L87 Difference]: Start difference. First operand 129 states and 148 transitions. Second operand 5 states. [2020-10-26 19:06:48,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:06:48,797 INFO L93 Difference]: Finished difference Result 250 states and 288 transitions. [2020-10-26 19:06:48,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:06:48,798 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 77 [2020-10-26 19:06:48,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:06:48,799 INFO L225 Difference]: With dead ends: 250 [2020-10-26 19:06:48,799 INFO L226 Difference]: Without dead ends: 131 [2020-10-26 19:06:48,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:06:48,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-26 19:06:48,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2020-10-26 19:06:48,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-26 19:06:48,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 150 transitions. [2020-10-26 19:06:48,822 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 150 transitions. Word has length 77 [2020-10-26 19:06:48,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:06:48,822 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 150 transitions. [2020-10-26 19:06:48,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:06:48,823 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 150 transitions. [2020-10-26 19:06:48,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-26 19:06:48,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:06:48,824 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-26 19:06:48,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:06:48,825 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:06:48,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:06:48,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1186316640, now seen corresponding path program 2 times [2020-10-26 19:06:48,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:06:48,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197531072] [2020-10-26 19:06:48,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:06:48,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:48,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:48,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:48,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:48,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:49,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:49,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:49,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:53,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:53,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-26 19:06:53,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:06:53,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:06:53,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:53,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:06:53,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:06:53,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:06:53,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:53,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:06:53,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:53,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:53,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:53,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:06:53,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:06:53,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:06:53,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:53,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:06:53,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:06:53,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:06:53,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:54,005 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-26 19:06:54,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197531072] [2020-10-26 19:06:54,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:06:54,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:06:54,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316390009] [2020-10-26 19:06:54,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:06:54,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:06:54,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:06:54,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:06:54,010 INFO L87 Difference]: Start difference. First operand 131 states and 150 transitions. Second operand 10 states. [2020-10-26 19:06:54,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:06:54,631 INFO L93 Difference]: Finished difference Result 256 states and 294 transitions. [2020-10-26 19:06:54,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:06:54,632 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 79 [2020-10-26 19:06:54,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:06:54,634 INFO L225 Difference]: With dead ends: 256 [2020-10-26 19:06:54,635 INFO L226 Difference]: Without dead ends: 134 [2020-10-26 19:06:54,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:06:54,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-26 19:06:54,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2020-10-26 19:06:54,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-26 19:06:54,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 152 transitions. [2020-10-26 19:06:54,649 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 152 transitions. Word has length 79 [2020-10-26 19:06:54,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:06:54,650 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 152 transitions. [2020-10-26 19:06:54,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:06:54,650 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 152 transitions. [2020-10-26 19:06:54,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-26 19:06:54,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:06:54,652 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:06:54,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:06:54,652 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:06:54,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:06:54,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1875494366, now seen corresponding path program 3 times [2020-10-26 19:06:54,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:06:54,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726219345] [2020-10-26 19:06:54,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:06:54,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:54,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:54,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:54,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:54,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:54,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:54,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:56,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:59,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:59,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 19:06:59,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:06:59,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:06:59,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:59,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:06:59,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:06:59,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:06:59,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:59,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:06:59,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:59,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:59,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:59,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:06:59,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:06:59,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:06:59,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:59,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:06:59,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:06:59,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:06:59,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:59,803 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-10-26 19:06:59,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726219345] [2020-10-26 19:06:59,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:06:59,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:06:59,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106058439] [2020-10-26 19:06:59,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:06:59,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:06:59,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:06:59,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:06:59,806 INFO L87 Difference]: Start difference. First operand 133 states and 152 transitions. Second operand 10 states. [2020-10-26 19:07:00,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:07:00,372 INFO L93 Difference]: Finished difference Result 207 states and 243 transitions. [2020-10-26 19:07:00,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:07:00,373 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2020-10-26 19:07:00,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:07:00,375 INFO L225 Difference]: With dead ends: 207 [2020-10-26 19:07:00,375 INFO L226 Difference]: Without dead ends: 100 [2020-10-26 19:07:00,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:07:00,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-26 19:07:00,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-10-26 19:07:00,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-26 19:07:00,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2020-10-26 19:07:00,388 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 81 [2020-10-26 19:07:00,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:07:00,388 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2020-10-26 19:07:00,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:07:00,388 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2020-10-26 19:07:00,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-26 19:07:00,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:07:00,390 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:07:00,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:07:00,390 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:07:00,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:07:00,391 INFO L82 PathProgramCache]: Analyzing trace with hash 997736500, now seen corresponding path program 4 times [2020-10-26 19:07:00,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:07:00,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132993763] [2020-10-26 19:07:00,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:07:00,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:00,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:02,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:03,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:05,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:05,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-26 19:07:05,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:07:05,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5490 [2020-10-26 19:07:05,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:05,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-26 19:07:05,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:07:05,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-26 19:07:05,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:07,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:07:07,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:07,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:07,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:07,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:07:07,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:07:07,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:07:07,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:07,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:07:07,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:07:07,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:07:07,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:07,479 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-26 19:07:07,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132993763] [2020-10-26 19:07:07,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:07:07,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:07:07,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259265048] [2020-10-26 19:07:07,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:07:07,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:07:07,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:07:07,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:07:07,483 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand 25 states. [2020-10-26 19:07:09,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:07:09,390 INFO L93 Difference]: Finished difference Result 180 states and 199 transitions. [2020-10-26 19:07:09,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:07:09,391 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 99 [2020-10-26 19:07:09,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:07:09,393 INFO L225 Difference]: With dead ends: 180 [2020-10-26 19:07:09,394 INFO L226 Difference]: Without dead ends: 174 [2020-10-26 19:07:09,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 13 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:07:09,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-26 19:07:09,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 169. [2020-10-26 19:07:09,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-26 19:07:09,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 188 transitions. [2020-10-26 19:07:09,416 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 188 transitions. Word has length 99 [2020-10-26 19:07:09,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:07:09,417 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 188 transitions. [2020-10-26 19:07:09,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:07:09,417 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 188 transitions. [2020-10-26 19:07:09,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-26 19:07:09,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:07:09,420 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:07:09,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:07:09,420 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:07:09,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:07:09,421 INFO L82 PathProgramCache]: Analyzing trace with hash -936525962, now seen corresponding path program 5 times [2020-10-26 19:07:09,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:07:09,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636095101] [2020-10-26 19:07:09,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:07:09,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:09,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:09,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:09,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:09,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:09,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:09,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:11,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:14,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:14,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-26 19:07:14,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:07:14,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:07:14,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:14,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:07:14,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:07:14,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:07:14,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:14,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:07:14,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:14,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:14,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:14,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:07:14,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:07:14,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:07:14,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:14,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:07:14,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:07:14,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:07:14,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:14,618 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-26 19:07:14,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636095101] [2020-10-26 19:07:14,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:07:14,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:07:14,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437425095] [2020-10-26 19:07:14,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:07:14,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:07:14,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:07:14,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:07:14,628 INFO L87 Difference]: Start difference. First operand 169 states and 188 transitions. Second operand 12 states. [2020-10-26 19:07:15,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:07:15,554 INFO L93 Difference]: Finished difference Result 332 states and 370 transitions. [2020-10-26 19:07:15,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:07:15,554 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 101 [2020-10-26 19:07:15,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:07:15,556 INFO L225 Difference]: With dead ends: 332 [2020-10-26 19:07:15,556 INFO L226 Difference]: Without dead ends: 172 [2020-10-26 19:07:15,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:07:15,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-26 19:07:15,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2020-10-26 19:07:15,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-26 19:07:15,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 190 transitions. [2020-10-26 19:07:15,575 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 190 transitions. Word has length 101 [2020-10-26 19:07:15,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:07:15,575 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 190 transitions. [2020-10-26 19:07:15,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:07:15,575 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 190 transitions. [2020-10-26 19:07:15,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-26 19:07:15,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:07:15,577 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:07:15,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:07:15,578 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:07:15,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:07:15,578 INFO L82 PathProgramCache]: Analyzing trace with hash 457919864, now seen corresponding path program 6 times [2020-10-26 19:07:15,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:07:15,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120880494] [2020-10-26 19:07:15,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:07:15,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:15,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:15,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:15,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:15,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:15,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:15,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:20,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:20,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:20,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-26 19:07:20,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:07:20,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:07:20,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:20,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:07:20,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:07:20,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:07:20,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:20,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:07:20,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:20,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:20,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:20,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:07:20,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:07:20,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:07:20,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:20,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:07:20,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:07:20,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:07:20,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:20,768 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2020-10-26 19:07:20,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120880494] [2020-10-26 19:07:20,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:07:20,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:07:20,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272396367] [2020-10-26 19:07:20,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:07:20,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:07:20,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:07:20,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:07:20,770 INFO L87 Difference]: Start difference. First operand 171 states and 190 transitions. Second operand 12 states. [2020-10-26 19:07:21,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:07:21,384 INFO L93 Difference]: Finished difference Result 261 states and 297 transitions. [2020-10-26 19:07:21,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:07:21,384 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 103 [2020-10-26 19:07:21,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:07:21,386 INFO L225 Difference]: With dead ends: 261 [2020-10-26 19:07:21,386 INFO L226 Difference]: Without dead ends: 122 [2020-10-26 19:07:21,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:07:21,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-26 19:07:21,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2020-10-26 19:07:21,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-26 19:07:21,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 132 transitions. [2020-10-26 19:07:21,398 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 132 transitions. Word has length 103 [2020-10-26 19:07:21,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:07:21,398 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 132 transitions. [2020-10-26 19:07:21,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:07:21,398 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 132 transitions. [2020-10-26 19:07:21,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-26 19:07:21,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:07:21,403 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:07:21,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:07:21,404 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:07:21,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:07:21,404 INFO L82 PathProgramCache]: Analyzing trace with hash -251856374, now seen corresponding path program 7 times [2020-10-26 19:07:21,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:07:21,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357880696] [2020-10-26 19:07:21,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:07:21,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:21,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:23,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:26,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:26,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-26 19:07:26,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:07:26,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:07:26,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:26,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 86 [2020-10-26 19:07:26,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:07:26,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-26 19:07:26,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:28,884 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2020-10-26 19:07:32,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:07:32,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:32,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:32,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:32,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:07:32,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:07:32,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:07:32,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:32,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:07:32,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:07:32,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:07:32,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:32,660 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 160 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-26 19:07:32,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357880696] [2020-10-26 19:07:32,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:07:32,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-26 19:07:32,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727488430] [2020-10-26 19:07:32,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-26 19:07:32,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:07:32,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-26 19:07:32,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2311, Unknown=0, NotChecked=0, Total=2450 [2020-10-26 19:07:32,664 INFO L87 Difference]: Start difference. First operand 122 states and 132 transitions. Second operand 50 states. [2020-10-26 19:07:33,194 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-26 19:07:33,502 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-10-26 19:07:33,796 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-10-26 19:07:34,551 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 84 [2020-10-26 19:07:35,076 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-10-26 19:07:35,423 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2020-10-26 19:07:35,763 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2020-10-26 19:07:36,880 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 91 [2020-10-26 19:07:41,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:07:41,533 INFO L93 Difference]: Finished difference Result 220 states and 239 transitions. [2020-10-26 19:07:41,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:07:41,534 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 121 [2020-10-26 19:07:41,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:07:41,537 INFO L225 Difference]: With dead ends: 220 [2020-10-26 19:07:41,537 INFO L226 Difference]: Without dead ends: 214 [2020-10-26 19:07:41,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 6 SyntacticMatches, 35 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=260, Invalid=4030, Unknown=0, NotChecked=0, Total=4290 [2020-10-26 19:07:41,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-26 19:07:41,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 207. [2020-10-26 19:07:41,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-26 19:07:41,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 226 transitions. [2020-10-26 19:07:41,558 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 226 transitions. Word has length 121 [2020-10-26 19:07:41,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:07:41,559 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 226 transitions. [2020-10-26 19:07:41,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-26 19:07:41,559 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 226 transitions. [2020-10-26 19:07:41,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-26 19:07:41,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:07:41,561 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:07:41,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:07:41,561 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:07:41,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:07:41,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1063853004, now seen corresponding path program 8 times [2020-10-26 19:07:41,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:07:41,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544363381] [2020-10-26 19:07:41,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:07:41,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:41,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:41,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:41,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:41,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:41,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:41,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:46,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:46,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-26 19:07:46,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:07:46,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:07:46,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:46,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:07:46,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:07:46,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:07:46,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:46,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:07:46,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:46,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:46,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:46,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:07:46,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:07:46,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:07:46,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:46,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:07:46,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:07:46,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:07:46,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:46,779 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-26 19:07:46,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544363381] [2020-10-26 19:07:46,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:07:46,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:07:46,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64549551] [2020-10-26 19:07:46,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:07:46,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:07:46,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:07:46,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:07:46,782 INFO L87 Difference]: Start difference. First operand 207 states and 226 transitions. Second operand 14 states. [2020-10-26 19:07:47,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:07:47,867 INFO L93 Difference]: Finished difference Result 408 states and 446 transitions. [2020-10-26 19:07:47,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:07:47,868 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 123 [2020-10-26 19:07:47,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:07:47,869 INFO L225 Difference]: With dead ends: 408 [2020-10-26 19:07:47,869 INFO L226 Difference]: Without dead ends: 210 [2020-10-26 19:07:47,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:07:47,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-26 19:07:47,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2020-10-26 19:07:47,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-10-26 19:07:47,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 228 transitions. [2020-10-26 19:07:47,888 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 228 transitions. Word has length 123 [2020-10-26 19:07:47,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:07:47,888 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 228 transitions. [2020-10-26 19:07:47,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:07:47,889 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 228 transitions. [2020-10-26 19:07:47,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-26 19:07:47,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:07:47,891 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:07:47,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:07:47,891 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:07:47,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:07:47,892 INFO L82 PathProgramCache]: Analyzing trace with hash -970236850, now seen corresponding path program 9 times [2020-10-26 19:07:47,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:07:47,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035601516] [2020-10-26 19:07:47,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:07:47,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:47,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:47,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:48,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:48,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:48,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:48,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:52,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:52,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-26 19:07:52,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:07:52,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:07:52,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:52,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:07:52,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:07:52,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:07:52,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:53,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:07:53,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:53,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:53,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:53,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:07:53,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:07:53,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:07:53,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:53,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:07:53,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:07:53,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:07:53,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:07:53,149 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-10-26 19:07:53,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035601516] [2020-10-26 19:07:53,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:07:53,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:07:53,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827179473] [2020-10-26 19:07:53,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:07:53,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:07:53,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:07:53,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:07:53,152 INFO L87 Difference]: Start difference. First operand 209 states and 228 transitions. Second operand 14 states. [2020-10-26 19:07:54,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:07:54,044 INFO L93 Difference]: Finished difference Result 315 states and 351 transitions. [2020-10-26 19:07:54,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:07:54,045 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 125 [2020-10-26 19:07:54,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:07:54,047 INFO L225 Difference]: With dead ends: 315 [2020-10-26 19:07:54,047 INFO L226 Difference]: Without dead ends: 144 [2020-10-26 19:07:54,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:07:54,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-26 19:07:54,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2020-10-26 19:07:54,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-26 19:07:54,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 154 transitions. [2020-10-26 19:07:54,060 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 154 transitions. Word has length 125 [2020-10-26 19:07:54,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:07:54,060 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 154 transitions. [2020-10-26 19:07:54,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:07:54,060 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 154 transitions. [2020-10-26 19:07:54,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-26 19:07:54,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:07:54,062 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:07:54,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:07:54,063 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:07:54,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:07:54,063 INFO L82 PathProgramCache]: Analyzing trace with hash -2111778976, now seen corresponding path program 10 times [2020-10-26 19:07:54,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:07:54,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625305457] [2020-10-26 19:07:54,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:07:54,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:54,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:58,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:04,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:04,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-26 19:08:04,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:08:04,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10218 [2020-10-26 19:08:04,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:04,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 111 [2020-10-26 19:08:04,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:08:04,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 137 [2020-10-26 19:08:04,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:17,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:08:17,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:17,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:17,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:17,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:08:17,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:08:17,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:08:17,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:17,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:08:17,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:08:17,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:08:17,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:17,213 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:08:17,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625305457] [2020-10-26 19:08:17,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:08:17,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2020-10-26 19:08:17,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988775502] [2020-10-26 19:08:17,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-10-26 19:08:17,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:08:17,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-10-26 19:08:17,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=6741, Unknown=0, NotChecked=0, Total=7140 [2020-10-26 19:08:17,218 INFO L87 Difference]: Start difference. First operand 144 states and 154 transitions. Second operand 85 states. [2020-10-26 19:08:32,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:08:32,273 INFO L93 Difference]: Finished difference Result 394 states and 429 transitions. [2020-10-26 19:08:32,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-26 19:08:32,274 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 143 [2020-10-26 19:08:32,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:08:32,279 INFO L225 Difference]: With dead ends: 394 [2020-10-26 19:08:32,279 INFO L226 Difference]: Without dead ends: 387 [2020-10-26 19:08:32,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 15 SyntacticMatches, 16 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3888 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=611, Invalid=11599, Unknown=0, NotChecked=0, Total=12210 [2020-10-26 19:08:32,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2020-10-26 19:08:32,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 355. [2020-10-26 19:08:32,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-10-26 19:08:32,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 384 transitions. [2020-10-26 19:08:32,328 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 384 transitions. Word has length 143 [2020-10-26 19:08:32,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:08:32,328 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 384 transitions. [2020-10-26 19:08:32,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-10-26 19:08:32,329 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 384 transitions. [2020-10-26 19:08:32,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-26 19:08:32,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:08:32,331 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:08:32,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:08:32,331 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:08:32,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:08:32,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1762693790, now seen corresponding path program 11 times [2020-10-26 19:08:32,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:08:32,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826862991] [2020-10-26 19:08:32,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:08:32,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:32,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:32,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:32,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:32,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:32,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:32,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:34,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:37,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:37,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-26 19:08:37,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:08:37,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:08:37,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:37,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:08:37,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:08:37,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-26 19:08:37,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:37,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:08:37,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:37,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:37,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:37,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:08:37,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:08:37,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:08:37,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:37,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:08:37,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:08:37,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:08:37,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:37,672 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-26 19:08:37,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826862991] [2020-10-26 19:08:37,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:08:37,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:08:37,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241087016] [2020-10-26 19:08:37,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:08:37,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:08:37,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:08:37,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:08:37,674 INFO L87 Difference]: Start difference. First operand 355 states and 384 transitions. Second operand 16 states. [2020-10-26 19:08:39,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:08:39,352 INFO L93 Difference]: Finished difference Result 585 states and 632 transitions. [2020-10-26 19:08:39,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:08:39,354 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 145 [2020-10-26 19:08:39,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:08:39,356 INFO L225 Difference]: With dead ends: 585 [2020-10-26 19:08:39,357 INFO L226 Difference]: Without dead ends: 248 [2020-10-26 19:08:39,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:08:39,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-26 19:08:39,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2020-10-26 19:08:39,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-10-26 19:08:39,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 266 transitions. [2020-10-26 19:08:39,379 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 266 transitions. Word has length 145 [2020-10-26 19:08:39,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:08:39,379 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 266 transitions. [2020-10-26 19:08:39,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:08:39,380 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 266 transitions. [2020-10-26 19:08:39,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-26 19:08:39,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:08:39,382 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:08:39,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:08:39,382 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:08:39,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:08:39,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1250113884, now seen corresponding path program 12 times [2020-10-26 19:08:39,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:08:39,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521970112] [2020-10-26 19:08:39,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:08:39,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:39,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:39,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:39,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:39,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:39,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:39,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:44,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:44,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-26 19:08:44,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:08:44,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:08:44,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:44,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:08:44,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:08:44,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:08:44,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:44,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:08:44,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:44,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:44,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:44,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:08:44,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:08:44,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:08:44,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:44,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:08:44,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:08:44,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:08:44,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:44,681 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2020-10-26 19:08:44,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521970112] [2020-10-26 19:08:44,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:08:44,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:08:44,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111911570] [2020-10-26 19:08:44,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:08:44,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:08:44,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:08:44,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:08:44,683 INFO L87 Difference]: Start difference. First operand 247 states and 266 transitions. Second operand 16 states. [2020-10-26 19:08:46,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:08:46,043 INFO L93 Difference]: Finished difference Result 369 states and 405 transitions. [2020-10-26 19:08:46,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:08:46,045 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 147 [2020-10-26 19:08:46,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:08:46,047 INFO L225 Difference]: With dead ends: 369 [2020-10-26 19:08:46,047 INFO L226 Difference]: Without dead ends: 166 [2020-10-26 19:08:46,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:08:46,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-26 19:08:46,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2020-10-26 19:08:46,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-26 19:08:46,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 176 transitions. [2020-10-26 19:08:46,060 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 176 transitions. Word has length 147 [2020-10-26 19:08:46,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:08:46,060 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 176 transitions. [2020-10-26 19:08:46,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:08:46,060 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 176 transitions. [2020-10-26 19:08:46,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-26 19:08:46,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:08:46,062 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:08:46,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:08:46,062 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:08:46,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:08:46,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1347280842, now seen corresponding path program 13 times [2020-10-26 19:08:46,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:08:46,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [801178478] [2020-10-26 19:08:46,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:08:46,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:46,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:53,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:53,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-26 19:08:53,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:08:53,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7192 [2020-10-26 19:08:53,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:53,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 128 [2020-10-26 19:08:53,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:08:53,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 159 [2020-10-26 19:08:53,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:59,240 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2020-10-26 19:09:00,136 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-10-26 19:09:01,153 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2020-10-26 19:09:01,420 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 35 [2020-10-26 19:09:01,721 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 31 [2020-10-26 19:09:04,287 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2020-10-26 19:09:05,803 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2020-10-26 19:09:06,131 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 23 [2020-10-26 19:09:07,381 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2020-10-26 19:09:07,667 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 33 [2020-10-26 19:09:07,943 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 31 [2020-10-26 19:09:08,244 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2020-10-26 19:09:08,566 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-10-26 19:09:09,209 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 42 [2020-10-26 19:09:09,568 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2020-10-26 19:09:09,928 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2020-10-26 19:09:10,292 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2020-10-26 19:09:10,626 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 36 [2020-10-26 19:09:10,976 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 34 [2020-10-26 19:09:11,323 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 35 [2020-10-26 19:09:11,669 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 33 [2020-10-26 19:09:12,016 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2020-10-26 19:09:12,341 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 30 [2020-10-26 19:09:12,710 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-10-26 19:09:13,087 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2020-10-26 19:09:13,596 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-10-26 19:09:14,050 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-10-26 19:09:14,658 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2020-10-26 19:09:15,208 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2020-10-26 19:09:15,703 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-10-26 19:09:16,170 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-10-26 19:09:16,640 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-10-26 19:09:17,128 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-10-26 19:09:17,583 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-10-26 19:09:18,008 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-10-26 19:09:18,434 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-10-26 19:09:19,083 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2020-10-26 19:09:19,602 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2020-10-26 19:09:23,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:09:23,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:09:23,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:23,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:09:23,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:09:23,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:09:23,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:09:23,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:09:23,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:09:23,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:09:23,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:09:23,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:09:24,044 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 19 proven. 341 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-26 19:09:24,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [801178478] [2020-10-26 19:09:24,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:09:24,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103] total 103 [2020-10-26 19:09:24,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498345625] [2020-10-26 19:09:24,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 103 states [2020-10-26 19:09:24,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:09:24,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2020-10-26 19:09:24,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=775, Invalid=9731, Unknown=0, NotChecked=0, Total=10506 [2020-10-26 19:09:24,050 INFO L87 Difference]: Start difference. First operand 166 states and 176 transitions. Second operand 103 states. [2020-10-26 19:09:24,584 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-10-26 19:09:27,951 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 72 [2020-10-26 19:09:28,643 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2020-10-26 19:09:30,696 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 29 [2020-10-26 19:09:31,549 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 68 [2020-10-26 19:09:32,103 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2020-10-26 19:09:32,990 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 54 [2020-10-26 19:09:34,009 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 71 [2020-10-26 19:09:35,219 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-26 19:09:36,294 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2020-10-26 19:09:37,202 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2020-10-26 19:09:37,786 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 29 [2020-10-26 19:09:38,407 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 31 [2020-10-26 19:09:39,045 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 33 [2020-10-26 19:09:39,705 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 37 [2020-10-26 19:09:40,536 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 67 [2020-10-26 19:09:41,385 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 55 [2020-10-26 19:09:42,503 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 73 [2020-10-26 19:09:43,837 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53