/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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/ldv-regression/test27-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:39:26,507 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:39:26,510 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:39:26,547 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:39:26,548 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:39:26,549 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:39:26,551 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:39:26,554 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:39:26,578 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:39:26,583 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:39:26,585 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:39:26,587 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:39:26,594 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:39:26,596 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:39:26,600 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:39:26,605 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:39:26,606 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:39:26,609 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:39:26,613 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:39:26,616 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:39:26,618 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:39:26,619 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:39:26,621 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:39:26,622 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:39:26,625 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:39:26,625 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:39:26,626 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:39:26,627 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:39:26,627 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:39:26,628 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:39:26,629 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:39:26,630 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:39:26,631 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:39:26,632 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:39:26,633 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:39:26,633 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:39:26,634 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:39:26,634 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:39:26,635 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:39:26,636 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:39:26,637 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:39:26,638 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 [2020-10-28 14:39:26,665 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:39:26,665 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:39:26,667 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:39:26,667 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:39:26,667 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:39:26,667 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:39:26,668 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:39:26,668 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:39:26,668 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:39:26,668 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:39:26,668 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:39:26,669 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:39:26,669 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:39:26,669 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:39:26,669 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:39:26,670 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:39:26,670 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:39:26,670 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:39:26,670 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:39:26,670 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:39:26,671 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:39:26,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:39:26,671 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:39:26,671 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:39:26,671 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:39:26,672 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:39:26,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:39:26,672 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:39:26,672 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:39:26,672 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:39:27,121 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:39:27,177 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:39:27,181 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:39:27,183 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:39:27,184 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:39:27,186 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test27-2.c [2020-10-28 14:39:27,284 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/90f813a01/d5605e93c2ad4825942a159dc782b6cb/FLAGf848e3d65 [2020-10-28 14:39:28,052 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:39:28,053 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test27-2.c [2020-10-28 14:39:28,067 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/90f813a01/d5605e93c2ad4825942a159dc782b6cb/FLAGf848e3d65 [2020-10-28 14:39:28,376 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/90f813a01/d5605e93c2ad4825942a159dc782b6cb [2020-10-28 14:39:28,379 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:39:28,385 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:39:28,387 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:39:28,387 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:39:28,391 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:39:28,392 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:39:28" (1/1) ... [2020-10-28 14:39:28,395 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@599d0b1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:39:28, skipping insertion in model container [2020-10-28 14:39:28,395 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:39:28" (1/1) ... [2020-10-28 14:39:28,403 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:39:28,419 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:39:28,598 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:39:28,608 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:39:28,634 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:39:28,655 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:39:28,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:39:28 WrapperNode [2020-10-28 14:39:28,656 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:39:28,657 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:39:28,657 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:39:28,657 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:39:28,690 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:39:28" (1/1) ... [2020-10-28 14:39:28,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:39:28" (1/1) ... [2020-10-28 14:39:28,721 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:39:28" (1/1) ... [2020-10-28 14:39:28,722 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:39:28" (1/1) ... [2020-10-28 14:39:28,743 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:39:28" (1/1) ... [2020-10-28 14:39:28,751 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:39:28" (1/1) ... [2020-10-28 14:39:28,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:39:28" (1/1) ... [2020-10-28 14:39:28,768 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:39:28,769 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:39:28,769 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:39:28,770 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:39:28,771 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:39:28" (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 [2020-10-28 14:39:28,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:39:28,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:39:28,873 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:39:28,873 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-10-28 14:39:28,874 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:39:28,874 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:39:28,875 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:39:28,875 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:39:28,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:39:28,875 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:39:28,877 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 14:39:28,877 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-28 14:39:28,877 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:39:28,877 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:39:28,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:39:28,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-28 14:39:28,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:39:28,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:39:28,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:39:28,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:39:29,450 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:39:29,451 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-28 14:39:29,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:39:29 BoogieIcfgContainer [2020-10-28 14:39:29,453 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:39:29,455 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:39:29,456 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:39:29,459 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:39:29,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:39:28" (1/3) ... [2020-10-28 14:39:29,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29945477 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:39:29, skipping insertion in model container [2020-10-28 14:39:29,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:39:28" (2/3) ... [2020-10-28 14:39:29,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29945477 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:39:29, skipping insertion in model container [2020-10-28 14:39:29,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:39:29" (3/3) ... [2020-10-28 14:39:29,464 INFO L111 eAbstractionObserver]: Analyzing ICFG test27-2.c [2020-10-28 14:39:29,478 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:39:29,484 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:39:29,509 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:39:29,552 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:39:29,553 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:39:29,553 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:39:29,553 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:39:29,553 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:39:29,554 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:39:29,554 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:39:29,554 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:39:29,580 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-28 14:39:29,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 14:39:29,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:39:29,589 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:39:29,590 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:39:29,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:39:29,599 INFO L82 PathProgramCache]: Analyzing trace with hash 597245021, now seen corresponding path program 1 times [2020-10-28 14:39:29,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:39:29,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968838584] [2020-10-28 14:39:29,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:39:29,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:29,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:29,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:30,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:30,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 14:39:30,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:39:30,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 624 [2020-10-28 14:39:30,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:30,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:30,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:30,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 14:39:30,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:30,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-28 14:39:30,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:39:30,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:30,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:30,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:30,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:30,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:30,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 14:39:30,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:30,612 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:30,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:30,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:39:30,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:30,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:39:30,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-28 14:39:30,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:30,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:30,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:30,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:30,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:30,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 14:39:30,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:30,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:30,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:30,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:39:30,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:30,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:39:30,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:39:30,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968838584] [2020-10-28 14:39:30,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:39:30,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:39:30,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31675589] [2020-10-28 14:39:30,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 14:39:30,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:39:30,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 14:39:30,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:39:30,696 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-10-28 14:39:30,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:39:30,859 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2020-10-28 14:39:30,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 14:39:30,861 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-28 14:39:30,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:39:30,871 INFO L225 Difference]: With dead ends: 47 [2020-10-28 14:39:30,871 INFO L226 Difference]: Without dead ends: 21 [2020-10-28 14:39:30,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:39:30,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-28 14:39:30,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-28 14:39:30,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-28 14:39:30,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-28 14:39:30,935 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2020-10-28 14:39:30,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:39:30,935 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-28 14:39:30,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 14:39:30,936 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-28 14:39:30,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 14:39:30,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:39:30,939 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:39:30,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:39:30,939 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:39:30,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:39:30,940 INFO L82 PathProgramCache]: Analyzing trace with hash -651701326, now seen corresponding path program 1 times [2020-10-28 14:39:30,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:39:30,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355136071] [2020-10-28 14:39:30,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:39:30,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:31,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:31,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:31,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 14:39:31,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:31,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-10-28 14:39:31,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:31,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:31,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:39:31,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:39:31,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:39:31,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:39:31,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:39:31,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:31,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:31,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:31,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:31,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:31,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:39:31,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:31,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:31,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:31,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:39:31,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:31,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:31,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-28 14:39:31,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:31,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:31,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:31,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:31,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:31,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:39:31,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:31,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:31,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:31,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:39:31,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:31,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:31,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:39:31,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355136071] [2020-10-28 14:39:31,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:39:31,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:39:31,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836644200] [2020-10-28 14:39:31,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:39:31,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:39:31,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:39:31,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:39:31,316 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 4 states. [2020-10-28 14:39:31,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:39:31,410 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-10-28 14:39:31,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:39:31,411 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-28 14:39:31,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:39:31,412 INFO L225 Difference]: With dead ends: 36 [2020-10-28 14:39:31,412 INFO L226 Difference]: Without dead ends: 23 [2020-10-28 14:39:31,413 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 [2020-10-28 14:39:31,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-28 14:39:31,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-28 14:39:31,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-28 14:39:31,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-28 14:39:31,421 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2020-10-28 14:39:31,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:39:31,421 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-28 14:39:31,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:39:31,422 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-28 14:39:31,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 14:39:31,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:39:31,423 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] [2020-10-28 14:39:31,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:39:31,423 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:39:31,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:39:31,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1404900848, now seen corresponding path program 1 times [2020-10-28 14:39:31,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:39:31,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914857124] [2020-10-28 14:39:31,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:39:31,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:31,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:31,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:31,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 14:39:31,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:31,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 282 [2020-10-28 14:39:31,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:31,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:31,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:39:31,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:39:31,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 14:39:31,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:31,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:39:31,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:31,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:31,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:31,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:31,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:31,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:39:31,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:31,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:31,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:31,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:39:31,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:31,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:39:31,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-28 14:39:31,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:31,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:31,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:31,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:31,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:31,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 14:39:31,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:31,844 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:31,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:31,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:39:31,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:31,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:31,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:39:31,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914857124] [2020-10-28 14:39:31,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:39:31,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 14:39:31,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237861152] [2020-10-28 14:39:31,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:39:31,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:39:31,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:39:31,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:39:31,855 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 5 states. [2020-10-28 14:39:31,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:39:31,974 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-10-28 14:39:31,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:39:31,975 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-28 14:39:31,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:39:31,977 INFO L225 Difference]: With dead ends: 38 [2020-10-28 14:39:31,977 INFO L226 Difference]: Without dead ends: 25 [2020-10-28 14:39:31,980 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 [2020-10-28 14:39:31,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-28 14:39:31,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-28 14:39:31,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-28 14:39:31,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-28 14:39:31,994 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2020-10-28 14:39:31,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:39:31,994 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-28 14:39:31,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:39:31,995 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-28 14:39:31,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 14:39:31,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:39:31,996 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:39:31,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:39:32,001 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:39:32,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:39:32,003 INFO L82 PathProgramCache]: Analyzing trace with hash 619831534, now seen corresponding path program 2 times [2020-10-28 14:39:32,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:39:32,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527687393] [2020-10-28 14:39:32,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:39:32,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:32,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:32,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:32,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 14:39:32,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:32,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 448 [2020-10-28 14:39:32,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:32,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:32,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:39:32,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:39:32,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:39:32,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:32,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:39:32,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:32,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:32,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:32,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:32,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:32,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:39:32,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:32,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:32,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:32,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:39:32,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:32,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:39:32,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-28 14:39:32,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:32,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:32,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:32,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:32,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:32,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:39:32,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:32,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:32,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:32,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:39:32,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:32,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:39:32,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:39:32,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527687393] [2020-10-28 14:39:32,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:39:32,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 14:39:32,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340006812] [2020-10-28 14:39:32,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:39:32,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:39:32,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:39:32,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:39:32,612 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 6 states. [2020-10-28 14:39:32,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:39:32,723 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-10-28 14:39:32,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:39:32,724 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-28 14:39:32,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:39:32,725 INFO L225 Difference]: With dead ends: 40 [2020-10-28 14:39:32,726 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 14:39:32,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:39:32,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 14:39:32,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-28 14:39:32,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-28 14:39:32,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-28 14:39:32,734 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23 [2020-10-28 14:39:32,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:39:32,734 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-28 14:39:32,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:39:32,734 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-28 14:39:32,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 14:39:32,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:39:32,736 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:39:32,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:39:32,736 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:39:32,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:39:32,737 INFO L82 PathProgramCache]: Analyzing trace with hash 767465548, now seen corresponding path program 3 times [2020-10-28 14:39:32,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:39:32,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542590796] [2020-10-28 14:39:32,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:39:32,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:32,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:33,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:33,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:39:33,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:33,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 613 [2020-10-28 14:39:33,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:33,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:33,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:39:33,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:39:33,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:39:33,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:33,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:39:33,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:33,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:33,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:33,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:33,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:33,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:39:33,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:33,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:33,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:33,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:39:33,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:33,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:39:33,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-28 14:39:33,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:33,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:33,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:33,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:33,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:33,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:39:33,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:33,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:33,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:33,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:39:33,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:33,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:39:33,485 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:39:33,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542590796] [2020-10-28 14:39:33,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:39:33,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 14:39:33,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033892482] [2020-10-28 14:39:33,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:39:33,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:39:33,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:39:33,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:39:33,488 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 7 states. [2020-10-28 14:39:33,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:39:33,598 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-10-28 14:39:33,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:39:33,598 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-28 14:39:33,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:39:33,599 INFO L225 Difference]: With dead ends: 42 [2020-10-28 14:39:33,600 INFO L226 Difference]: Without dead ends: 29 [2020-10-28 14:39:33,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:39:33,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-28 14:39:33,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-28 14:39:33,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 14:39:33,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-10-28 14:39:33,607 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2020-10-28 14:39:33,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:39:33,607 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-10-28 14:39:33,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:39:33,607 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-10-28 14:39:33,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 14:39:33,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:39:33,609 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:39:33,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:39:33,609 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:39:33,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:39:33,610 INFO L82 PathProgramCache]: Analyzing trace with hash 909832234, now seen corresponding path program 4 times [2020-10-28 14:39:33,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:39:33,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711116702] [2020-10-28 14:39:33,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:39:33,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:33,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:34,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:34,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 14:39:34,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:34,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 662 [2020-10-28 14:39:34,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:34,297 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:34,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:39:34,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:39:34,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:39:34,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:39:34,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:39:34,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:34,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:34,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:34,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:34,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:34,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:39:34,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:34,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:34,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:34,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:39:34,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:34,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:39:34,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-28 14:39:34,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:34,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:34,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:34,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:34,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:34,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:39:34,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:34,445 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:34,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:34,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:39:34,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:34,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:39:34,450 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:39:34,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711116702] [2020-10-28 14:39:34,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:39:34,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:39:34,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043030520] [2020-10-28 14:39:34,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:39:34,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:39:34,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:39:34,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:39:34,453 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 8 states. [2020-10-28 14:39:34,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:39:34,603 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-10-28 14:39:34,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:39:34,604 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-28 14:39:34,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:39:34,605 INFO L225 Difference]: With dead ends: 44 [2020-10-28 14:39:34,605 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 14:39:34,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:39:34,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 14:39:34,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-28 14:39:34,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 14:39:34,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-10-28 14:39:34,611 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2020-10-28 14:39:34,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:39:34,612 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-10-28 14:39:34,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:39:34,612 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-10-28 14:39:34,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 14:39:34,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:39:34,613 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:39:34,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:39:34,613 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:39:34,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:39:34,614 INFO L82 PathProgramCache]: Analyzing trace with hash 285264008, now seen corresponding path program 5 times [2020-10-28 14:39:34,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:39:34,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1686463820] [2020-10-28 14:39:34,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:39:34,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:34,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:35,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:35,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 14:39:35,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:35,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1107 [2020-10-28 14:39:35,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:35,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:35,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:39:35,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:39:35,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:39:35,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:35,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:39:35,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:35,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:35,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:35,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:35,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:35,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:39:35,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:35,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:35,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:35,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:39:35,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:35,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:39:35,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-28 14:39:35,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:35,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:35,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:35,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:35,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:35,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:39:35,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:35,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:35,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:35,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:39:35,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:35,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:35,890 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:39:35,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1686463820] [2020-10-28 14:39:35,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:39:35,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:39:35,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388446412] [2020-10-28 14:39:35,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:39:35,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:39:35,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:39:35,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:39:35,895 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 9 states. [2020-10-28 14:39:36,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:39:36,041 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-10-28 14:39:36,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:39:36,042 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-10-28 14:39:36,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:39:36,043 INFO L225 Difference]: With dead ends: 46 [2020-10-28 14:39:36,043 INFO L226 Difference]: Without dead ends: 33 [2020-10-28 14:39:36,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:39:36,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-28 14:39:36,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-28 14:39:36,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 14:39:36,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-28 14:39:36,055 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2020-10-28 14:39:36,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:39:36,055 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-28 14:39:36,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:39:36,056 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-28 14:39:36,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 14:39:36,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:39:36,058 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:39:36,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:39:36,059 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:39:36,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:39:36,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1370620262, now seen corresponding path program 6 times [2020-10-28 14:39:36,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:39:36,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030886340] [2020-10-28 14:39:36,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:39:36,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:36,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:37,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:37,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 14:39:37,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:37,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1568 [2020-10-28 14:39:37,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:37,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:37,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:39:37,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:39:37,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:39:37,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:37,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:39:37,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:37,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:37,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:37,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:37,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:37,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:39:37,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:37,791 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:37,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:37,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:39:37,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:37,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:37,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-28 14:39:37,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:37,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:37,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:37,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:37,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:37,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:39:37,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:37,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:37,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:37,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:39:37,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:37,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:39:37,810 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:39:37,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030886340] [2020-10-28 14:39:37,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:39:37,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:39:37,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665632435] [2020-10-28 14:39:37,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:39:37,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:39:37,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:39:37,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:39:37,813 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 10 states. [2020-10-28 14:39:37,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:39:37,983 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-10-28 14:39:37,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:39:37,984 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-28 14:39:37,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:39:37,985 INFO L225 Difference]: With dead ends: 48 [2020-10-28 14:39:37,985 INFO L226 Difference]: Without dead ends: 35 [2020-10-28 14:39:37,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:39:37,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-28 14:39:37,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-10-28 14:39:37,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-28 14:39:37,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-10-28 14:39:37,995 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2020-10-28 14:39:37,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:39:37,997 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-10-28 14:39:37,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:39:37,997 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-10-28 14:39:37,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 14:39:37,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:39:37,998 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:39:37,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:39:37,999 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:39:38,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:39:38,000 INFO L82 PathProgramCache]: Analyzing trace with hash 720927428, now seen corresponding path program 7 times [2020-10-28 14:39:38,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:39:38,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490510791] [2020-10-28 14:39:38,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:39:38,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:38,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:39,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:39,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:39:39,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:39,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1904 [2020-10-28 14:39:39,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:39,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:39,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:39:39,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:39:39,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:39:39,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:40,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:39:40,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:40,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:40,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:40,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:40,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:40,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:39:40,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:40,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:40,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:40,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:39:40,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:40,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:40,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-28 14:39:40,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:40,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:40,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:40,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:40,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:40,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:39:40,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:40,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:40,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:40,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:39:40,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:40,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:39:40,099 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:39:40,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490510791] [2020-10-28 14:39:40,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:39:40,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:39:40,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347449354] [2020-10-28 14:39:40,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:39:40,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:39:40,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:39:40,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:39:40,102 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 11 states. [2020-10-28 14:39:40,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:39:40,255 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-10-28 14:39:40,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:39:40,256 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-28 14:39:40,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:39:40,257 INFO L225 Difference]: With dead ends: 50 [2020-10-28 14:39:40,257 INFO L226 Difference]: Without dead ends: 37 [2020-10-28 14:39:40,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:39:40,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-28 14:39:40,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-28 14:39:40,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 14:39:40,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-10-28 14:39:40,264 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 33 [2020-10-28 14:39:40,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:39:40,264 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-10-28 14:39:40,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:39:40,264 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-10-28 14:39:40,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:39:40,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:39:40,265 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:39:40,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:39:40,266 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:39:40,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:39:40,266 INFO L82 PathProgramCache]: Analyzing trace with hash -863628126, now seen corresponding path program 8 times [2020-10-28 14:39:40,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:39:40,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838134236] [2020-10-28 14:39:40,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:39:40,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:40,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:42,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:42,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 14:39:42,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:42,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2187 [2020-10-28 14:39:42,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:42,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:42,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:39:42,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:39:42,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 14:39:42,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:42,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:39:42,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:42,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:42,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:42,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:42,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:42,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:39:42,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:42,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:42,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:42,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:39:42,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:42,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:39:42,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-28 14:39:42,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:42,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:42,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:42,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:42,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:42,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:39:42,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:42,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:42,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:42,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:39:42,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:42,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:42,677 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:39:42,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838134236] [2020-10-28 14:39:42,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:39:42,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:39:42,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403960524] [2020-10-28 14:39:42,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:39:42,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:39:42,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:39:42,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:39:42,681 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-10-28 14:39:42,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:39:42,837 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-10-28 14:39:42,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:39:42,837 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-28 14:39:42,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:39:42,838 INFO L225 Difference]: With dead ends: 52 [2020-10-28 14:39:42,839 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 14:39:42,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:39:42,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 14:39:42,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-28 14:39:42,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 14:39:42,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-10-28 14:39:42,848 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 35 [2020-10-28 14:39:42,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:39:42,848 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-10-28 14:39:42,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:39:42,848 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-10-28 14:39:42,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 14:39:42,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:39:42,849 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:39:42,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:39:42,850 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:39:42,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:39:42,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1091874560, now seen corresponding path program 9 times [2020-10-28 14:39:42,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:39:42,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493927433] [2020-10-28 14:39:42,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:39:42,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:42,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:45,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:45,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 14:39:45,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:45,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2534 [2020-10-28 14:39:45,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:45,413 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:45,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:39:45,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:39:45,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:39:45,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:45,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:39:45,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:45,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:45,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:45,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:45,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:45,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:39:45,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:45,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:45,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:45,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:39:45,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:45,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:45,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-28 14:39:45,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:45,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:45,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:45,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:45,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:45,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:39:45,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:45,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:45,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:45,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:39:45,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:45,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:45,623 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:39:45,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493927433] [2020-10-28 14:39:45,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:39:45,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:39:45,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629859342] [2020-10-28 14:39:45,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:39:45,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:39:45,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:39:45,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:39:45,626 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 13 states. [2020-10-28 14:39:45,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:39:45,796 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2020-10-28 14:39:45,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:39:45,797 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-10-28 14:39:45,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:39:45,798 INFO L225 Difference]: With dead ends: 53 [2020-10-28 14:39:45,798 INFO L226 Difference]: Without dead ends: 40 [2020-10-28 14:39:45,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:39:45,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-28 14:39:45,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-28 14:39:45,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 14:39:45,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-10-28 14:39:45,808 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 37 [2020-10-28 14:39:45,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:39:45,809 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-10-28 14:39:45,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:39:45,809 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-10-28 14:39:45,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 14:39:45,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:39:45,812 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:39:45,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:39:45,813 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:39:45,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:39:45,813 INFO L82 PathProgramCache]: Analyzing trace with hash -865719842, now seen corresponding path program 10 times [2020-10-28 14:39:45,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:39:45,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107317001] [2020-10-28 14:39:45,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:39:45,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-28 14:39:45,942 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-28 14:39:45,942 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-28 14:39:45,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:39:45,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 02:39:45 BoogieIcfgContainer [2020-10-28 14:39:45,981 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 14:39:45,984 INFO L168 Benchmark]: Toolchain (without parser) took 17601.79 ms. Allocated memory was 159.4 MB in the beginning and 503.3 MB in the end (delta: 343.9 MB). Free memory was 141.4 MB in the beginning and 238.1 MB in the end (delta: -96.7 MB). Peak memory consumption was 246.5 MB. Max. memory is 8.0 GB. [2020-10-28 14:39:45,985 INFO L168 Benchmark]: CDTParser took 0.71 ms. Allocated memory is still 159.4 MB. Free memory is still 130.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 14:39:45,990 INFO L168 Benchmark]: CACSL2BoogieTranslator took 269.37 ms. Allocated memory is still 159.4 MB. Free memory was 140.8 MB in the beginning and 130.6 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-28 14:39:45,992 INFO L168 Benchmark]: Boogie Preprocessor took 111.20 ms. Allocated memory is still 159.4 MB. Free memory was 130.6 MB in the beginning and 141.5 MB in the end (delta: -10.9 MB). Peak memory consumption was 1.7 MB. Max. memory is 8.0 GB. [2020-10-28 14:39:45,993 INFO L168 Benchmark]: RCFGBuilder took 684.32 ms. Allocated memory is still 159.4 MB. Free memory was 141.2 MB in the beginning and 121.9 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2020-10-28 14:39:45,996 INFO L168 Benchmark]: TraceAbstraction took 16525.59 ms. Allocated memory was 159.4 MB in the beginning and 503.3 MB in the end (delta: 343.9 MB). Free memory was 121.6 MB in the beginning and 238.1 MB in the end (delta: -116.5 MB). Peak memory consumption was 228.0 MB. Max. memory is 8.0 GB. [2020-10-28 14:39:46,007 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.71 ms. Allocated memory is still 159.4 MB. Free memory is still 130.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 269.37 ms. Allocated memory is still 159.4 MB. Free memory was 140.8 MB in the beginning and 130.6 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 111.20 ms. Allocated memory is still 159.4 MB. Free memory was 130.6 MB in the beginning and 141.5 MB in the end (delta: -10.9 MB). Peak memory consumption was 1.7 MB. Max. memory is 8.0 GB. * RCFGBuilder took 684.32 ms. Allocated memory is still 159.4 MB. Free memory was 141.2 MB in the beginning and 121.9 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 16525.59 ms. Allocated memory was 159.4 MB in the beginning and 503.3 MB in the end (delta: 343.9 MB). Free memory was 121.6 MB in the beginning and 238.1 MB in the end (delta: -116.5 MB). Peak memory consumption was 228.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L23] struct cont cont; [L24] struct dummy dummy; [L25] struct dummy *dummies[10]; [L26] int a[10]; [L27] int i, *pa; [L28] i = __VERIFIER_nondet_int() [L29] int j = 0; [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND FALSE !(j < 10) [L36] COND TRUE i >= 0 && i < 9 [L37] a[i] = i [L38] dummy.array = &a[i] [L39] dummies[i + 1] = &dummy [L40] cont.array = &dummies[0] [L41] EXPR cont.array [L41] EXPR cont.array[i] [L41] EXPR cont.array[i]->array [L41] pa = &cont.array[i]->array[i] [L42] EXPR a[i] [L42] COND TRUE a[i] > 0 [L43] EXPR dummies[i + 1] [L43] EXPR dummies[i + 1]->array [L43] EXPR dummies[i + 1]->array[i] [L43] i = dummies[i + 1]->array[i] - 10 [L44] EXPR \read(*pa) [L44] COND FALSE !(i < *pa) [L47] CALL, EXPR check(&cont, i) [L18] EXPR pc->array [L18] EXPR pc->array[i] [L18] EXPR pc->array[i]->array [L18] EXPR pc->array[i]->array[i] [L18] return pc->array[i]->array[i] == i; [L47] RET, EXPR check(&cont, i) [L47] COND TRUE !check(&cont, i) [L55] CALL reach_error() [L3] __assert_fail("0", "test27-2.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 16.3s, OverallIterations: 12, TraceHistogramMax: 10, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 207 SDtfs, 88 SDslu, 640 SDs, 0 SdLazy, 519 SolverSat, 47 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 121 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 9 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 13.8s InterpolantComputationTime, 337 NumberOfCodeBlocks, 337 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 287 ConstructedInterpolants, 0 QuantifiedInterpolants, 22579 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 0/285 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 incorrect! Received shutdown request...