/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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/loop-crafted/simple_array_index_value_3.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:38:00,512 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:38:00,517 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:38:00,573 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:38:00,573 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:38:00,580 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:38:00,583 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:38:00,587 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:38:00,591 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:38:00,599 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:38:00,601 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:38:00,602 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:38:00,603 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:38:00,606 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:38:00,610 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:38:00,613 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:38:00,614 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:38:00,619 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:38:00,626 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:38:00,629 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:38:00,637 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:38:00,638 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:38:00,640 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:38:00,642 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:38:00,649 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:38:00,650 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:38:00,650 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:38:00,653 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:38:00,654 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:38:00,655 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:38:00,656 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:38:00,657 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:38:00,659 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:38:00,660 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:38:00,661 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:38:00,661 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:38:00,662 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:38:00,662 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:38:00,662 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:38:00,693 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:38:00,695 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:38:00,706 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 [2020-10-29 09:38:00,763 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:38:00,764 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:38:00,770 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:38:00,770 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:38:00,770 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:38:00,770 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:38:00,771 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:38:00,771 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:38:00,771 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:38:00,772 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:38:00,773 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:38:00,773 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:38:00,774 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:38:00,774 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:38:00,774 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:38:00,774 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:38:00,774 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:38:00,775 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:38:00,775 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:38:00,776 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:38:00,776 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:38:00,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:38:00,776 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:38:00,777 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:38:00,777 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:38:00,777 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:38:00,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:38:00,777 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:38:00,778 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:38:00,778 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:38:01,207 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:38:01,251 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:38:01,255 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:38:01,256 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:38:01,257 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:38:01,258 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_3.i [2020-10-29 09:38:01,340 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64ae2754d/b773b7a709694374840ba0666c58f65a/FLAG04c611256 [2020-10-29 09:38:01,946 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:38:01,947 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-crafted/simple_array_index_value_3.i [2020-10-29 09:38:01,955 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64ae2754d/b773b7a709694374840ba0666c58f65a/FLAG04c611256 [2020-10-29 09:38:02,267 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64ae2754d/b773b7a709694374840ba0666c58f65a [2020-10-29 09:38:02,273 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:38:02,282 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:38:02,286 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:38:02,287 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:38:02,291 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:38:02,292 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:38:02" (1/1) ... [2020-10-29 09:38:02,298 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72d796c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:38:02, skipping insertion in model container [2020-10-29 09:38:02,299 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:38:02" (1/1) ... [2020-10-29 09:38:02,308 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:38:02,342 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:38:02,513 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:38:02,523 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:38:02,547 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:38:02,566 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:38:02,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:38:02 WrapperNode [2020-10-29 09:38:02,567 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:38:02,569 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:38:02,569 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:38:02,569 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:38:02,603 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:38:02" (1/1) ... [2020-10-29 09:38:02,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:38:02" (1/1) ... [2020-10-29 09:38:02,635 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:38:02" (1/1) ... [2020-10-29 09:38:02,636 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:38:02" (1/1) ... [2020-10-29 09:38:02,647 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:38:02" (1/1) ... [2020-10-29 09:38:02,658 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:38:02" (1/1) ... [2020-10-29 09:38:02,668 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:38:02" (1/1) ... [2020-10-29 09:38:02,671 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:38:02,674 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:38:02,674 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:38:02,675 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:38:02,676 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:38:02" (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 [2020-10-29 09:38:02,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:38:02,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:38:02,781 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:38:02,781 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 09:38:02,781 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 09:38:02,781 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:38:02,781 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:38:02,782 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:38:02,782 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 09:38:02,782 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 09:38:02,782 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:38:02,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:38:02,783 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 09:38:02,783 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 09:38:02,783 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:38:02,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:38:02,783 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:38:02,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:38:02,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:38:02,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:38:02,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:38:03,152 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:38:03,153 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-29 09:38:03,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:38:03 BoogieIcfgContainer [2020-10-29 09:38:03,155 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:38:03,157 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:38:03,157 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:38:03,161 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:38:03,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:38:02" (1/3) ... [2020-10-29 09:38:03,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f3953e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:38:03, skipping insertion in model container [2020-10-29 09:38:03,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:38:02" (2/3) ... [2020-10-29 09:38:03,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f3953e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:38:03, skipping insertion in model container [2020-10-29 09:38:03,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:38:03" (3/3) ... [2020-10-29 09:38:03,166 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_3.i [2020-10-29 09:38:03,179 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:38:03,184 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:38:03,200 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:38:03,263 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:38:03,263 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:38:03,264 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:38:03,264 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:38:03,264 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:38:03,264 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:38:03,264 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:38:03,265 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:38:03,289 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-29 09:38:03,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-29 09:38:03,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:03,298 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:03,299 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:03,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:03,310 INFO L82 PathProgramCache]: Analyzing trace with hash 42548533, now seen corresponding path program 1 times [2020-10-29 09:38:03,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:03,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198570820] [2020-10-29 09:38:03,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:03,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:03,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:03,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:04,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:04,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-29 09:38:04,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:38:04,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 625 [2020-10-29 09:38:04,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:04,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:04,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:38:04,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:38:04,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:38:04,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 09:38:04,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:04,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:04,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:04,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:04,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:04,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:04,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 09:38:04,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:04,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:04,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:04,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:04,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:04,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:38:04,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:38:04,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198570820] [2020-10-29 09:38:04,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:38:04,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:38:04,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522531879] [2020-10-29 09:38:04,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:38:04,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:04,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:38:04,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:38:04,391 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 6 states. [2020-10-29 09:38:04,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:04,633 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2020-10-29 09:38:04,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:38:04,635 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-29 09:38:04,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:04,643 INFO L225 Difference]: With dead ends: 54 [2020-10-29 09:38:04,644 INFO L226 Difference]: Without dead ends: 27 [2020-10-29 09:38:04,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:38:04,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-29 09:38:04,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-29 09:38:04,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-29 09:38:04,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-29 09:38:04,698 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 16 [2020-10-29 09:38:04,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:04,699 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-29 09:38:04,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:38:04,700 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-29 09:38:04,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-29 09:38:04,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:04,702 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:04,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:38:04,703 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:04,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:04,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1817555895, now seen corresponding path program 1 times [2020-10-29 09:38:04,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:04,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805747736] [2020-10-29 09:38:04,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:04,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:04,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:04,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:04,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-29 09:38:04,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:04,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-29 09:38:04,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:04,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:04,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:38:04,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:38:04,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 09:38:04,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:04,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:04,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:04,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:04,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:04,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:04,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:04,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 09:38:04,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:04,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:04,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:04,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:04,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:04,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:04,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:38:04,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805747736] [2020-10-29 09:38:04,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:38:04,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:38:04,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806392671] [2020-10-29 09:38:04,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:38:04,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:04,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:38:04,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:38:04,994 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 4 states. [2020-10-29 09:38:05,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:05,084 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-10-29 09:38:05,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:38:05,085 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-29 09:38:05,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:05,089 INFO L225 Difference]: With dead ends: 52 [2020-10-29 09:38:05,089 INFO L226 Difference]: Without dead ends: 33 [2020-10-29 09:38:05,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:38:05,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-29 09:38:05,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2020-10-29 09:38:05,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-29 09:38:05,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-29 09:38:05,105 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 16 [2020-10-29 09:38:05,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:05,105 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-29 09:38:05,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:38:05,105 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-29 09:38:05,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-29 09:38:05,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:05,106 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:05,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:38:05,107 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:05,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:05,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1664459521, now seen corresponding path program 1 times [2020-10-29 09:38:05,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:05,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955453913] [2020-10-29 09:38:05,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:05,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:05,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:05,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:05,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:06,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:06,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-29 09:38:06,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:38:06,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 972 [2020-10-29 09:38:06,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:06,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:06,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:38:06,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:38:06,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:38:06,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:06,419 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 27 [2020-10-29 09:38:06,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:06,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:06,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:06,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:06,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:06,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:06,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:38:06,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:06,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:06,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:06,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:06,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:06,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:06,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:38:06,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955453913] [2020-10-29 09:38:06,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:06,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:38:06,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420625776] [2020-10-29 09:38:06,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:38:06,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:06,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:38:06,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:38:06,610 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 9 states. [2020-10-29 09:38:07,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:07,029 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2020-10-29 09:38:07,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:38:07,030 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-10-29 09:38:07,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:07,032 INFO L225 Difference]: With dead ends: 60 [2020-10-29 09:38:07,032 INFO L226 Difference]: Without dead ends: 42 [2020-10-29 09:38:07,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:38:07,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-29 09:38:07,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 31. [2020-10-29 09:38:07,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-29 09:38:07,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-10-29 09:38:07,043 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 17 [2020-10-29 09:38:07,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:07,043 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-10-29 09:38:07,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:38:07,043 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-10-29 09:38:07,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-29 09:38:07,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:07,044 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:07,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:38:07,045 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:07,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:07,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1213439223, now seen corresponding path program 2 times [2020-10-29 09:38:07,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:07,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402317008] [2020-10-29 09:38:07,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:07,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:07,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:07,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:07,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:07,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:07,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-29 09:38:07,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:38:07,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 684 [2020-10-29 09:38:07,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:07,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:07,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:38:07,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:38:07,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:38:07,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:08,198 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 37 [2020-10-29 09:38:08,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:08,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:08,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:08,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:08,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:08,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:08,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:38:08,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:08,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:08,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:08,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:08,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:08,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 09:38:08,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:38:08,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402317008] [2020-10-29 09:38:08,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:08,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:38:08,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403634577] [2020-10-29 09:38:08,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:38:08,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:08,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:38:08,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:38:08,326 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 10 states. [2020-10-29 09:38:09,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:09,083 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2020-10-29 09:38:09,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:38:09,084 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-29 09:38:09,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:09,085 INFO L225 Difference]: With dead ends: 62 [2020-10-29 09:38:09,085 INFO L226 Difference]: Without dead ends: 44 [2020-10-29 09:38:09,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:38:09,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-29 09:38:09,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2020-10-29 09:38:09,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-29 09:38:09,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-29 09:38:09,095 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 18 [2020-10-29 09:38:09,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:09,095 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-29 09:38:09,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:38:09,095 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-29 09:38:09,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:38:09,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:09,096 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:09,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:38:09,097 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:09,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:09,097 INFO L82 PathProgramCache]: Analyzing trace with hash 2091275264, now seen corresponding path program 1 times [2020-10-29 09:38:09,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:09,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926006034] [2020-10-29 09:38:09,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:09,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:09,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:09,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:09,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:38:09,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:09,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-10-29 09:38:09,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:09,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:09,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:38:09,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:38:09,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-29 09:38:09,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:38:09,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:09,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:09,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:09,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:09,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:09,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:09,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:38:09,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:09,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:09,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:09,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:09,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:09,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:38:09,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-29 09:38:09,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:09,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:09,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:09,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 09:38:09,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:09,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:38:09,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:09,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:09,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:09,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 09:38:09,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:09,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:38:09,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 09:38:09,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926006034] [2020-10-29 09:38:09,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:09,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 09:38:09,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797979070] [2020-10-29 09:38:09,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:38:09,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:09,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:38:09,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:38:09,398 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 5 states. [2020-10-29 09:38:09,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:09,514 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-10-29 09:38:09,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 09:38:09,515 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-10-29 09:38:09,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:09,516 INFO L225 Difference]: With dead ends: 60 [2020-10-29 09:38:09,516 INFO L226 Difference]: Without dead ends: 39 [2020-10-29 09:38:09,517 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 [2020-10-29 09:38:09,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-29 09:38:09,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2020-10-29 09:38:09,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-29 09:38:09,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-29 09:38:09,528 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 26 [2020-10-29 09:38:09,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:09,528 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-29 09:38:09,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:38:09,529 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-29 09:38:09,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:38:09,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:09,530 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:09,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:38:09,530 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:09,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:09,531 INFO L82 PathProgramCache]: Analyzing trace with hash 901983946, now seen corresponding path program 2 times [2020-10-29 09:38:09,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:09,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360697035] [2020-10-29 09:38:09,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:09,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:09,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:09,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:10,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:10,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 09:38:10,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:38:10,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 454 [2020-10-29 09:38:10,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:10,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:10,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:38:10,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:38:10,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:38:10,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0