/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loops-crafted-1/nested_delay_nd.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:31:28,400 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:31:28,404 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:31:28,462 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:31:28,463 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:31:28,469 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:31:28,472 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:31:28,477 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:31:28,480 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:31:28,486 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:31:28,487 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:31:28,489 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:31:28,489 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:31:28,492 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:31:28,494 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:31:28,496 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:31:28,497 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:31:28,500 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:31:28,509 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:31:28,518 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:31:28,522 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:31:28,524 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:31:28,525 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:31:28,528 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:31:28,548 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:31:28,548 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:31:28,548 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:31:28,550 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:31:28,550 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:31:28,552 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:31:28,552 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:31:28,553 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:31:28,555 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:31:28,556 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:31:28,557 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:31:28,557 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:31:28,558 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:31:28,558 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:31:28,558 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:31:28,559 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:31:28,560 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:31:28,568 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 20:31:28,617 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:31:28,617 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:31:28,622 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:31:28,622 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:31:28,622 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:31:28,623 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:31:28,623 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:31:28,623 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:31:28,623 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:31:28,623 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:31:28,624 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:31:28,625 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:31:28,625 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:31:28,625 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:31:28,625 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:31:28,625 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:31:28,626 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:31:28,626 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:31:28,626 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:31:28,626 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:31:28,626 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:31:28,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:31:28,627 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:31:28,627 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:31:28,627 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:31:28,628 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:31:28,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:31:28,628 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:31:28,628 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:31:28,628 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:31:29,079 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:31:29,124 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:31:29,127 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:31:29,129 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:31:29,130 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:31:29,132 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested_delay_nd.c [2020-10-27 20:31:29,215 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e44020cb1/97dc408436ef4bf5840615c952628574/FLAG2eed48db6 [2020-10-27 20:31:29,925 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:31:29,926 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/nested_delay_nd.c [2020-10-27 20:31:29,935 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e44020cb1/97dc408436ef4bf5840615c952628574/FLAG2eed48db6 [2020-10-27 20:31:30,268 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e44020cb1/97dc408436ef4bf5840615c952628574 [2020-10-27 20:31:30,277 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:31:30,285 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:31:30,289 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:31:30,290 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:31:30,294 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:31:30,295 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:31:30" (1/1) ... [2020-10-27 20:31:30,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a939db3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:31:30, skipping insertion in model container [2020-10-27 20:31:30,302 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:31:30" (1/1) ... [2020-10-27 20:31:30,312 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:31:30,332 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:31:30,541 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:31:30,552 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:31:30,574 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:31:30,591 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:31:30,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:31:30 WrapperNode [2020-10-27 20:31:30,592 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:31:30,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:31:30,594 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:31:30,594 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:31:30,607 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:31:30" (1/1) ... [2020-10-27 20:31:30,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:31:30" (1/1) ... [2020-10-27 20:31:30,619 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:31:30" (1/1) ... [2020-10-27 20:31:30,619 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:31:30" (1/1) ... [2020-10-27 20:31:30,626 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:31:30" (1/1) ... [2020-10-27 20:31:30,631 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:31:30" (1/1) ... [2020-10-27 20:31:30,632 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:31:30" (1/1) ... [2020-10-27 20:31:30,635 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:31:30,636 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:31:30,636 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:31:30,636 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:31:30,637 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:31:30" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:31:30,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:31:30,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:31:30,716 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:31:30,717 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 20:31:30,717 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 20:31:30,718 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:31:30,718 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:31:30,718 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:31:30,718 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:31:30,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:31:30,720 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 20:31:30,721 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 20:31:30,721 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 20:31:30,721 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:31:30,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:31:30,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:31:30,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:31:30,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:31:30,723 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:31:30,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:31:31,323 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:31:31,324 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 20:31:31,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:31:31 BoogieIcfgContainer [2020-10-27 20:31:31,327 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:31:31,353 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:31:31,354 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:31:31,357 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:31:31,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:31:30" (1/3) ... [2020-10-27 20:31:31,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35f96834 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:31:31, skipping insertion in model container [2020-10-27 20:31:31,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:31:30" (2/3) ... [2020-10-27 20:31:31,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35f96834 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:31:31, skipping insertion in model container [2020-10-27 20:31:31,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:31:31" (3/3) ... [2020-10-27 20:31:31,362 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_delay_nd.c [2020-10-27 20:31:31,375 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:31:31,382 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:31:31,396 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:31:31,435 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:31:31,435 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:31:31,435 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:31:31,435 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:31:31,435 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:31:31,435 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:31:31,436 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:31:31,436 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:31:31,461 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-27 20:31:31,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 20:31:31,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:31:31,469 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:31:31,470 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:31:31,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:31:31,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1391196817, now seen corresponding path program 1 times [2020-10-27 20:31:31,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:31:31,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545815613] [2020-10-27 20:31:31,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:31:31,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:31,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:31,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:31,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:31,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:32,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:32,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:32,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:32,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:31:32,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 20:31:32,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 888 [2020-10-27 20:31:32,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:32,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:31:32,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 20:31:32,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 20:31:32,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 20:31:32,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:31:32,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:32,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:32,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:32,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:31:32,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:32,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 20:31:32,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:32,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:32,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:32,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:32,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:32,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:31:32,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:32,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:32,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:32,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:32,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:31:32,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:31:32,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:31:32,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:32,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:32,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-27 20:31:32,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:32,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:31:32,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:31:32,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545815613] [2020-10-27 20:31:32,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:31:32,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:31:32,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920455984] [2020-10-27 20:31:32,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:31:32,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:31:32,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:31:32,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:31:32,747 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 4 states. [2020-10-27 20:31:32,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:31:32,976 INFO L93 Difference]: Finished difference Result 60 states and 89 transitions. [2020-10-27 20:31:32,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:31:32,978 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-27 20:31:32,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:31:32,993 INFO L225 Difference]: With dead ends: 60 [2020-10-27 20:31:32,993 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 20:31:32,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:31:33,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 20:31:33,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2020-10-27 20:31:33,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 20:31:33,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-10-27 20:31:33,046 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 22 [2020-10-27 20:31:33,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:31:33,046 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-10-27 20:31:33,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:31:33,047 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-10-27 20:31:33,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 20:31:33,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:31:33,048 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:31:33,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:31:33,049 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:31:33,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:31:33,050 INFO L82 PathProgramCache]: Analyzing trace with hash -509530784, now seen corresponding path program 1 times [2020-10-27 20:31:33,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:31:33,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116450208] [2020-10-27 20:31:33,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:31:33,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:33,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:33,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:33,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:33,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:33,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:31:33,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:31:33,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 298 [2020-10-27 20:31:33,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:33,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:31:33,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 20:31:33,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 20:31:33,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-27 20:31:33,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:31:33,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:33,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:33,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:33,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:31:33,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:33,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 20:31:33,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:33,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:33,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:33,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:33,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:33,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:31:33,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:33,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:33,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:33,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:31:33,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:33,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:31:33,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:33,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:33,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:33,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:33,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:33,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:31:33,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116450208] [2020-10-27 20:31:33,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:31:33,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:31:33,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671248853] [2020-10-27 20:31:33,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:31:33,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:31:33,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:31:33,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:31:33,546 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 4 states. [2020-10-27 20:31:33,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:31:33,765 INFO L93 Difference]: Finished difference Result 55 states and 74 transitions. [2020-10-27 20:31:33,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:31:33,766 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-27 20:31:33,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:31:33,768 INFO L225 Difference]: With dead ends: 55 [2020-10-27 20:31:33,768 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 20:31:33,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:31:33,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 20:31:33,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2020-10-27 20:31:33,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 20:31:33,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2020-10-27 20:31:33,779 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 22 [2020-10-27 20:31:33,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:31:33,780 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2020-10-27 20:31:33,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:31:33,780 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2020-10-27 20:31:33,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 20:31:33,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:31:33,781 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] [2020-10-27 20:31:33,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:31:33,782 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:31:33,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:31:33,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1244698826, now seen corresponding path program 1 times [2020-10-27 20:31:33,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:31:33,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629973307] [2020-10-27 20:31:33,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:31:33,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:33,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:33,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:33,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:33,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:34,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:34,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:34,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 20:31:34,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:31:34,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 643 [2020-10-27 20:31:34,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:34,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:31:34,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 20:31:34,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:31:34,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:34,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:31:34,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:34,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:34,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:34,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:31:34,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:34,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:31:34,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:34,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:34,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:34,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:34,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:34,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:31:34,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:34,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:34,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:34,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:31:34,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:34,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:31:34,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:34,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:34,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:34,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:34,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:34,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:31:34,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629973307] [2020-10-27 20:31:34,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:31:34,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 20:31:34,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047613227] [2020-10-27 20:31:34,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:31:34,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:31:34,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:31:34,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:31:34,642 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand 7 states. [2020-10-27 20:31:35,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:31:35,331 INFO L93 Difference]: Finished difference Result 101 states and 145 transitions. [2020-10-27 20:31:35,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:31:35,333 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-27 20:31:35,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:31:35,339 INFO L225 Difference]: With dead ends: 101 [2020-10-27 20:31:35,339 INFO L226 Difference]: Without dead ends: 80 [2020-10-27 20:31:35,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:31:35,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-27 20:31:35,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 62. [2020-10-27 20:31:35,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 20:31:35,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 88 transitions. [2020-10-27 20:31:35,381 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 88 transitions. Word has length 23 [2020-10-27 20:31:35,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:31:35,382 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 88 transitions. [2020-10-27 20:31:35,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:31:35,382 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 88 transitions. [2020-10-27 20:31:35,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 20:31:35,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:31:35,386 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] [2020-10-27 20:31:35,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:31:35,387 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:31:35,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:31:35,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1187440524, now seen corresponding path program 1 times [2020-10-27 20:31:35,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:31:35,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158240851] [2020-10-27 20:31:35,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:31:35,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:35,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:35,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:35,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:35,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 20:31:35,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:31:35,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-27 20:31:35,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:35,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:31:35,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:31:35,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:31:35,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:35,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:31:35,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:35,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:35,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:35,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:31:35,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:35,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:31:35,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:35,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:35,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:35,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:35,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:35,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:31:35,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:35,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:35,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:35,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:31:35,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:35,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:31:35,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:35,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:31:35,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:35,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:31:35,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:35,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:31:35,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158240851] [2020-10-27 20:31:35,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:31:35,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 20:31:35,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525464292] [2020-10-27 20:31:35,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:31:35,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:31:35,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:31:35,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:31:35,742 INFO L87 Difference]: Start difference. First operand 62 states and 88 transitions. Second operand 8 states. [2020-10-27 20:31:36,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:31:36,544 INFO L93 Difference]: Finished difference Result 160 states and 232 transitions. [2020-10-27 20:31:36,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:31:36,546 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-27 20:31:36,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:31:36,548 INFO L225 Difference]: With dead ends: 160 [2020-10-27 20:31:36,548 INFO L226 Difference]: Without dead ends: 110 [2020-10-27 20:31:36,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:31:36,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-27 20:31:36,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 89. [2020-10-27 20:31:36,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-27 20:31:36,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 122 transitions. [2020-10-27 20:31:36,568 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 122 transitions. Word has length 23 [2020-10-27 20:31:36,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:31:36,568 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 122 transitions. [2020-10-27 20:31:36,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:31:36,568 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 122 transitions. [2020-10-27 20:31:36,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 20:31:36,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:31:36,569 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] [2020-10-27 20:31:36,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:31:36,570 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:31:36,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:31:36,570 INFO L82 PathProgramCache]: Analyzing trace with hash 530308536, now seen corresponding path program 1 times [2020-10-27 20:31:36,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:31:36,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680381489] [2020-10-27 20:31:36,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:31:36,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:36,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:36,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:36,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:36,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 20:31:36,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:31:36,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-10-27 20:31:36,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:36,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:31:36,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 20:31:36,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 20:31:36,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:36,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:31:36,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:36,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:36,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:36,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:31:36,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:36,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 20:31:36,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:36,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:31:36,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:36,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 20:31:36,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:36,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:31:36,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:36,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:36,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:36,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:31:36,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:36,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:31:36,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:36,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:31:36,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:36,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:31:36,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:36,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:31:36,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680381489] [2020-10-27 20:31:36,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:31:36,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 20:31:36,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749008872] [2020-10-27 20:31:36,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:31:36,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:31:36,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:31:36,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:31:36,819 INFO L87 Difference]: Start difference. First operand 89 states and 122 transitions. Second operand 5 states. [2020-10-27 20:31:37,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:31:37,068 INFO L93 Difference]: Finished difference Result 96 states and 128 transitions. [2020-10-27 20:31:37,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:31:37,069 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-27 20:31:37,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:31:37,071 INFO L225 Difference]: With dead ends: 96 [2020-10-27 20:31:37,071 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 20:31:37,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:31:37,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 20:31:37,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2020-10-27 20:31:37,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 20:31:37,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 92 transitions. [2020-10-27 20:31:37,105 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 92 transitions. Word has length 23 [2020-10-27 20:31:37,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:31:37,105 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 92 transitions. [2020-10-27 20:31:37,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:31:37,105 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 92 transitions. [2020-10-27 20:31:37,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 20:31:37,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:31:37,107 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] [2020-10-27 20:31:37,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:31:37,107 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:31:37,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:31:37,108 INFO L82 PathProgramCache]: Analyzing trace with hash -444547372, now seen corresponding path program 1 times [2020-10-27 20:31:37,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:31:37,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895445153] [2020-10-27 20:31:37,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:31:37,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:37,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:37,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:37,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:37,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:37,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:37,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:38,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:38,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 20:31:38,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 20:31:38,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-10-27 20:31:38,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:38,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:31:38,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 20:31:38,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:31:38,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:38,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:31:38,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:38,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:38,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:38,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:31:38,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:38,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:31:38,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:38,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:38,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:38,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:38,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:38,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:31:38,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:38,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:38,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:38,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:31:38,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:38,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:31:38,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:38,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:38,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:38,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:38,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:38,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:31:38,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895445153] [2020-10-27 20:31:38,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:31:38,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 20:31:38,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008363590] [2020-10-27 20:31:38,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:31:38,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:31:38,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:31:38,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:31:38,250 INFO L87 Difference]: Start difference. First operand 67 states and 92 transitions. Second operand 6 states. [2020-10-27 20:31:38,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:31:38,675 INFO L93 Difference]: Finished difference Result 186 states and 266 transitions. [2020-10-27 20:31:38,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:31:38,678 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-27 20:31:38,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:31:38,680 INFO L225 Difference]: With dead ends: 186 [2020-10-27 20:31:38,680 INFO L226 Difference]: Without dead ends: 131 [2020-10-27 20:31:38,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:31:38,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-27 20:31:38,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 110. [2020-10-27 20:31:38,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-27 20:31:38,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 149 transitions. [2020-10-27 20:31:38,722 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 149 transitions. Word has length 26 [2020-10-27 20:31:38,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:31:38,723 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 149 transitions. [2020-10-27 20:31:38,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:31:38,723 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 149 transitions. [2020-10-27 20:31:38,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 20:31:38,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:31:38,727 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] [2020-10-27 20:31:38,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:31:38,728 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:31:38,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:31:38,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1330459990, now seen corresponding path program 1 times [2020-10-27 20:31:38,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:31:38,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049716553] [2020-10-27 20:31:38,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:31:38,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:38,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:38,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:38,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:38,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:38,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 20:31:38,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:31:38,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-10-27 20:31:38,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:38,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:31:38,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 20:31:38,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:31:38,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:39,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:31:39,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:39,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:39,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:39,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:31:39,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:39,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:31:39,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:39,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:39,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:39,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:39,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:39,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:31:39,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:39,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:39,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:39,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:31:39,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:39,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:31:39,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:39,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:39,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:39,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:39,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:39,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:31:39,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049716553] [2020-10-27 20:31:39,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:31:39,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 20:31:39,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872515127] [2020-10-27 20:31:39,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:31:39,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:31:39,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:31:39,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:31:39,042 INFO L87 Difference]: Start difference. First operand 110 states and 149 transitions. Second operand 6 states. [2020-10-27 20:31:39,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:31:39,340 INFO L93 Difference]: Finished difference Result 210 states and 288 transitions. [2020-10-27 20:31:39,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:31:39,341 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-27 20:31:39,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:31:39,343 INFO L225 Difference]: With dead ends: 210 [2020-10-27 20:31:39,343 INFO L226 Difference]: Without dead ends: 141 [2020-10-27 20:31:39,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:31:39,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-27 20:31:39,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 127. [2020-10-27 20:31:39,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-27 20:31:39,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 175 transitions. [2020-10-27 20:31:39,380 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 175 transitions. Word has length 26 [2020-10-27 20:31:39,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:31:39,380 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 175 transitions. [2020-10-27 20:31:39,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:31:39,380 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 175 transitions. [2020-10-27 20:31:39,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 20:31:39,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:31:39,381 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] [2020-10-27 20:31:39,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:31:39,382 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:31:39,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:31:39,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1387718292, now seen corresponding path program 1 times [2020-10-27 20:31:39,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:31:39,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368829175] [2020-10-27 20:31:39,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:31:39,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:39,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:39,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:39,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:39,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 20:31:39,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:31:39,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 297 [2020-10-27 20:31:39,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:39,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:31:39,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 20:31:39,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 20:31:39,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:39,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:31:39,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:39,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:39,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:39,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:31:39,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:39,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 20:31:39,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:39,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:39,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:39,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:39,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:39,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:31:39,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:39,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:39,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:39,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:31:39,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:39,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:31:39,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:39,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:39,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:39,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:39,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:39,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:31:39,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368829175] [2020-10-27 20:31:39,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:31:39,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 20:31:39,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866428067] [2020-10-27 20:31:39,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:31:39,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:31:39,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:31:39,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:31:39,980 INFO L87 Difference]: Start difference. First operand 127 states and 175 transitions. Second operand 9 states. [2020-10-27 20:31:40,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:31:40,349 INFO L93 Difference]: Finished difference Result 197 states and 270 transitions. [2020-10-27 20:31:40,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:31:40,350 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-27 20:31:40,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:31:40,352 INFO L225 Difference]: With dead ends: 197 [2020-10-27 20:31:40,352 INFO L226 Difference]: Without dead ends: 184 [2020-10-27 20:31:40,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:31:40,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-27 20:31:40,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 183. [2020-10-27 20:31:40,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-27 20:31:40,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 251 transitions. [2020-10-27 20:31:40,388 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 251 transitions. Word has length 26 [2020-10-27 20:31:40,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:31:40,389 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 251 transitions. [2020-10-27 20:31:40,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:31:40,389 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 251 transitions. [2020-10-27 20:31:40,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 20:31:40,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:31:40,392 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:31:40,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:31:40,392 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:31:40,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:31:40,392 INFO L82 PathProgramCache]: Analyzing trace with hash -149840420, now seen corresponding path program 1 times [2020-10-27 20:31:40,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:31:40,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073984678] [2020-10-27 20:31:40,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:31:40,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:40,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:40,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:40,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:40,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:40,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:40,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:41,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:41,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 20:31:41,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 20:31:41,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 780 [2020-10-27 20:31:41,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:41,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:31:41,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 20:31:41,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 20:31:41,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:41,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:31:41,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:41,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:41,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:41,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:31:41,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:41,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:31:41,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:41,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:41,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:41,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:41,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:41,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:31:41,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:41,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:41,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:41,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:31:41,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:41,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:31:41,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:41,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:41,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:41,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:41,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:31:41,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:31:41,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073984678] [2020-10-27 20:31:41,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:31:41,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 20:31:41,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937093292] [2020-10-27 20:31:41,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:31:41,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:31:41,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:31:41,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:31:41,302 INFO L87 Difference]: Start difference. First operand 183 states and 251 transitions. Second operand 5 states. [2020-10-27 20:31:41,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:31:41,496 INFO L93 Difference]: Finished difference Result 297 states and 403 transitions. [2020-10-27 20:31:41,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:31:41,497 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-10-27 20:31:41,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:31:41,499 INFO L225 Difference]: With dead ends: 297 [2020-10-27 20:31:41,499 INFO L226 Difference]: Without dead ends: 126 [2020-10-27 20:31:41,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:31:41,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-27 20:31:41,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 117. [2020-10-27 20:31:41,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-27 20:31:41,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 147 transitions. [2020-10-27 20:31:41,517 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 147 transitions. Word has length 28 [2020-10-27 20:31:41,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:31:41,518 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 147 transitions. [2020-10-27 20:31:41,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:31:41,518 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 147 transitions. [2020-10-27 20:31:41,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 20:31:41,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:31:41,523 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:31:41,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:31:41,524 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:31:41,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:31:41,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1139297866, now seen corresponding path program 1 times [2020-10-27 20:31:41,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:31:41,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1122404819] [2020-10-27 20:31:41,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:31:41,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:41,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:41,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:41,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:41,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:41,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:41,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:41,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:42,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:42,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:42,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 20:31:42,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 20:31:42,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1104 [2020-10-27 20:31:42,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:42,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:31:42,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 20:31:42,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 20:31:42,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:31:42,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:31:42,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:42,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:42,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:42,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:31:42,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:42,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:31:42,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:42,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:42,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:42,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:42,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:42,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:31:42,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:42,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:42,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:42,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:31:42,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:42,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:31:42,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:42,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:42,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:42,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:42,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:42,738 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 20:31:42,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1122404819] [2020-10-27 20:31:42,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:31:42,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:31:42,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99129877] [2020-10-27 20:31:42,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:31:42,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:31:42,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:31:42,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:31:42,740 INFO L87 Difference]: Start difference. First operand 117 states and 147 transitions. Second operand 4 states. [2020-10-27 20:31:42,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:31:42,839 INFO L93 Difference]: Finished difference Result 121 states and 150 transitions. [2020-10-27 20:31:42,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:31:42,840 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-27 20:31:42,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:31:42,843 INFO L225 Difference]: With dead ends: 121 [2020-10-27 20:31:42,843 INFO L226 Difference]: Without dead ends: 0 [2020-10-27 20:31:42,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:31:42,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-27 20:31:42,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-27 20:31:42,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-27 20:31:42,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-27 20:31:42,845 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-10-27 20:31:42,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:31:42,845 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-27 20:31:42,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:31:42,845 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-27 20:31:42,845 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-27 20:31:42,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:31:42,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-27 20:31:43,352 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-10-27 20:31:43,682 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2020-10-27 20:31:44,041 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2020-10-27 20:31:44,093 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-10-27 20:31:44,093 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-27 20:31:44,093 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-10-27 20:31:44,094 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-27 20:31:44,094 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-27 20:31:44,094 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= ~SIZE~0 |old(~SIZE~0)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= ~last~0 |old(~last~0)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-27 20:31:44,094 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-27 20:31:44,094 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-27 20:31:44,094 INFO L270 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: (<= 200000 ~SIZE~0) [2020-10-27 20:31:44,094 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-27 20:31:44,095 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-27 20:31:44,095 INFO L277 CegarLoopResult]: At program point assume_abort_if_notENTRY(lines 5 7) the Hoare annotation is: true [2020-10-27 20:31:44,095 INFO L274 CegarLoopResult]: For program point L6(line 6) no Hoare annotation was computed. [2020-10-27 20:31:44,095 INFO L274 CegarLoopResult]: For program point L6-2(lines 5 7) no Hoare annotation was computed. [2020-10-27 20:31:44,095 INFO L274 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 5 7) no Hoare annotation was computed. [2020-10-27 20:31:44,095 INFO L274 CegarLoopResult]: For program point L27-2(lines 27 29) no Hoare annotation was computed. [2020-10-27 20:31:44,095 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 20 47) no Hoare annotation was computed. [2020-10-27 20:31:44,096 INFO L270 CegarLoopResult]: At program point L27-3(lines 27 29) the Hoare annotation is: (let ((.cse0 (<= main_~a~0 main_~b~0)) (.cse4 (<= 1 ~last~0)) (.cse1 (<= main_~b~0 main_~a~0)) (.cse5 (<= main_~d~0 0)) (.cse2 (<= 1 main_~st~0)) (.cse6 (<= 0 main_~d~0)) (.cse3 (<= main_~c~0 ~SIZE~0))) (or (and .cse0 (<= (+ ~SIZE~0 1) main_~d~0) (<= ~SIZE~0 ~last~0) .cse1 .cse2 .cse3) (not (<= 200000 ~SIZE~0)) (and (<= (+ ~last~0 1) main_~c~0) .cse0 (<= main_~st~0 0) .cse4 .cse1 .cse5 .cse6 .cse3) (and .cse0 .cse4 (<= main_~c~0 ~last~0) .cse1 .cse5 .cse2 (<= main_~d~0 main_~c~0) .cse6 .cse3))) [2020-10-27 20:31:44,096 INFO L277 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: true [2020-10-27 20:31:44,096 INFO L274 CegarLoopResult]: For program point L27-4(lines 25 45) no Hoare annotation was computed. [2020-10-27 20:31:44,096 INFO L274 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-10-27 20:31:44,096 INFO L270 CegarLoopResult]: At program point L44(lines 25 45) the Hoare annotation is: (let ((.cse0 (<= main_~a~0 main_~b~0)) (.cse1 (<= 1 ~last~0)) (.cse2 (<= main_~d~0 0)) (.cse5 (<= 0 main_~d~0)) (.cse3 (<= main_~b~0 main_~a~0)) (.cse4 (<= 200000 ~SIZE~0))) (or (and .cse0 (<= main_~st~0 0) .cse1 .cse2 .cse3 .cse4 (<= main_~d~0 main_~c~0) .cse5) (and .cse0 (let ((.cse6 (<= ~SIZE~0 ~last~0))) (or (and .cse6 (<= (+ ~SIZE~0 1) main_~d~0)) (and .cse1 .cse2 .cse6 .cse4 .cse5))) .cse3 (< ~SIZE~0 (+ main_~c~0 1)) (<= main_~c~0 ~SIZE~0)) (not .cse4))) [2020-10-27 20:31:44,096 INFO L274 CegarLoopResult]: For program point L36(lines 36 38) no Hoare annotation was computed. [2020-10-27 20:31:44,097 INFO L274 CegarLoopResult]: For program point L36-2(lines 25 45) no Hoare annotation was computed. [2020-10-27 20:31:44,097 INFO L274 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-10-27 20:31:44,097 INFO L274 CegarLoopResult]: For program point L25-2(lines 25 45) no Hoare annotation was computed. [2020-10-27 20:31:44,097 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 20 47) no Hoare annotation was computed. [2020-10-27 20:31:44,097 INFO L270 CegarLoopResult]: At program point mainENTRY(lines 20 47) the Hoare annotation is: (or (= ~last~0 |old(~last~0)|) (not (<= 200000 ~SIZE~0))) [2020-10-27 20:31:44,097 INFO L274 CegarLoopResult]: For program point L30-1(lines 25 45) no Hoare annotation was computed. [2020-10-27 20:31:44,097 INFO L270 CegarLoopResult]: At program point L39-1(lines 39 42) the Hoare annotation is: (let ((.cse0 (<= main_~a~0 main_~b~0)) (.cse1 (<= main_~b~0 main_~a~0)) (.cse3 (<= main_~d~0 0)) (.cse4 (<= 0 main_~d~0)) (.cse5 (< ~SIZE~0 (+ main_~c~0 1))) (.cse6 (<= main_~c~0 ~SIZE~0))) (or (and .cse0 .cse1 (let ((.cse2 (<= ~SIZE~0 ~last~0))) (or (and .cse2 (<= (+ ~SIZE~0 1) main_~d~0)) (and .cse3 .cse2 .cse4))) .cse5 .cse6) (not (<= 200000 ~SIZE~0)) (and .cse0 (<= main_~st~0 0) (<= 1 ~last~0) .cse1 .cse3 .cse4 .cse5 .cse6))) [2020-10-27 20:31:44,098 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 10 15) the Hoare annotation is: true [2020-10-27 20:31:44,098 INFO L270 CegarLoopResult]: At program point L12(line 12) the Hoare annotation is: (or (not (<= 1 |__VERIFIER_assert_#in~cond|)) (not (<= 1 ~last~0)) (not (<= 200000 ~SIZE~0))) [2020-10-27 20:31:44,098 INFO L274 CegarLoopResult]: For program point L11(lines 11 13) no Hoare annotation was computed. [2020-10-27 20:31:44,098 INFO L274 CegarLoopResult]: For program point L12-1(line 12) no Hoare annotation was computed. [2020-10-27 20:31:44,098 INFO L274 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 10 15) no Hoare annotation was computed. [2020-10-27 20:31:44,098 INFO L274 CegarLoopResult]: For program point L11-2(lines 10 15) no Hoare annotation was computed. [2020-10-27 20:31:44,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 08:31:44 BoogieIcfgContainer [2020-10-27 20:31:44,120 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 20:31:44,122 INFO L168 Benchmark]: Toolchain (without parser) took 13842.54 ms. Allocated memory was 151.0 MB in the beginning and 272.6 MB in the end (delta: 121.6 MB). Free memory was 126.1 MB in the beginning and 182.6 MB in the end (delta: -56.5 MB). Peak memory consumption was 153.0 MB. Max. memory is 8.0 GB. [2020-10-27 20:31:44,123 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 124.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 20:31:44,123 INFO L168 Benchmark]: CACSL2BoogieTranslator took 303.42 ms. Allocated memory is still 151.0 MB. Free memory was 125.5 MB in the beginning and 115.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-27 20:31:44,124 INFO L168 Benchmark]: Boogie Preprocessor took 41.34 ms. Allocated memory is still 151.0 MB. Free memory was 115.8 MB in the beginning and 114.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-27 20:31:44,125 INFO L168 Benchmark]: RCFGBuilder took 691.15 ms. Allocated memory is still 151.0 MB. Free memory was 114.3 MB in the beginning and 98.6 MB in the end (delta: 15.6 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2020-10-27 20:31:44,126 INFO L168 Benchmark]: TraceAbstraction took 12767.02 ms. Allocated memory was 151.0 MB in the beginning and 272.6 MB in the end (delta: 121.6 MB). Free memory was 133.4 MB in the beginning and 182.6 MB in the end (delta: -49.1 MB). Peak memory consumption was 159.4 MB. Max. memory is 8.0 GB. [2020-10-27 20:31:44,129 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 124.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 303.42 ms. Allocated memory is still 151.0 MB. Free memory was 125.5 MB in the beginning and 115.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.34 ms. Allocated memory is still 151.0 MB. Free memory was 115.8 MB in the beginning and 114.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 691.15 ms. Allocated memory is still 151.0 MB. Free memory was 114.3 MB in the beginning and 98.6 MB in the end (delta: 15.6 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 12767.02 ms. Allocated memory was 151.0 MB in the beginning and 272.6 MB in the end (delta: 121.6 MB). Free memory was 133.4 MB in the beginning and 182.6 MB in the end (delta: -49.1 MB). Peak memory consumption was 159.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: ((((((((a <= b && st <= 0) && 1 <= last) && d <= 0) && b <= a) && 200000 <= SIZE) && d <= c) && 0 <= d) || ((((a <= b && ((SIZE <= last && SIZE + 1 <= d) || ((((1 <= last && d <= 0) && SIZE <= last) && 200000 <= SIZE) && 0 <= d))) && b <= a) && SIZE < c + 1) && c <= SIZE)) || !(200000 <= SIZE) - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: (((((((a <= b && SIZE + 1 <= d) && SIZE <= last) && b <= a) && 1 <= st) && c <= SIZE) || !(200000 <= SIZE)) || (((((((last + 1 <= c && a <= b) && st <= 0) && 1 <= last) && b <= a) && d <= 0) && 0 <= d) && c <= SIZE)) || ((((((((a <= b && 1 <= last) && c <= last) && b <= a) && d <= 0) && 1 <= st) && d <= c) && 0 <= d) && c <= SIZE) - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 11.4s, OverallIterations: 10, TraceHistogramMax: 2, AutomataDifference: 3.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 253 SDtfs, 364 SDslu, 235 SDs, 0 SdLazy, 922 SolverSat, 131 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 110 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=183occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 97 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 85 PreInvPairs, 94 NumberOfFragments, 285 HoareAnnotationTreeSize, 85 FomulaSimplifications, 1206 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 12 FomulaSimplificationsInter, 943 FormulaSimplificationTreeSizeReductionInter, 1.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 6.9s InterpolantComputationTime, 248 NumberOfCodeBlocks, 248 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 238 ConstructedInterpolants, 0 QuantifiedInterpolants, 20599 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 9 PerfectInterpolantSequences, 12/13 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...