/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-lit/bhmr2007.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:43:07,427 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:43:07,430 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:43:07,466 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:43:07,467 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:43:07,468 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:43:07,470 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:43:07,473 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:43:07,475 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:43:07,476 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:43:07,477 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:43:07,479 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:43:07,479 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:43:07,480 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:43:07,482 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:43:07,483 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:43:07,485 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:43:07,487 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:43:07,496 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:43:07,500 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:43:07,504 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:43:07,506 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:43:07,509 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:43:07,511 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:43:07,531 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:43:07,531 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:43:07,532 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:43:07,538 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:43:07,539 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:43:07,540 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:43:07,541 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:43:07,541 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:43:07,543 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:43:07,545 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:43:07,546 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:43:07,546 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:43:07,547 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:43:07,547 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:43:07,547 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:43:07,549 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:43:07,549 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:43:07,551 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 09:43:07,617 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:43:07,618 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:43:07,623 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:43:07,624 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:43:07,624 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:43:07,624 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:43:07,625 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:43:07,625 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:43:07,625 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:43:07,625 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:43:07,627 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:43:07,627 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:43:07,627 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:43:07,627 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:43:07,628 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:43:07,628 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:43:07,628 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:43:07,628 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:43:07,629 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:43:07,629 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:43:07,629 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:43:07,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:43:07,630 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:43:07,630 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:43:07,630 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:43:07,631 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:43:07,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:43:07,631 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:43:07,631 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:43:07,631 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:43:08,093 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:43:08,124 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:43:08,127 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:43:08,129 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:43:08,130 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:43:08,131 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/bhmr2007.i [2020-10-29 09:43:08,216 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/886488a77/38c06e48fc8541ae9ee4527b5b428da4/FLAG55fc6e866 [2020-10-29 09:43:08,951 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:43:08,951 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/bhmr2007.i [2020-10-29 09:43:08,960 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/886488a77/38c06e48fc8541ae9ee4527b5b428da4/FLAG55fc6e866 [2020-10-29 09:43:09,274 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/886488a77/38c06e48fc8541ae9ee4527b5b428da4 [2020-10-29 09:43:09,281 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:43:09,288 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:43:09,290 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:43:09,291 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:43:09,294 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:43:09,296 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:43:09" (1/1) ... [2020-10-29 09:43:09,302 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35f6f4bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:43:09, skipping insertion in model container [2020-10-29 09:43:09,302 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:43:09" (1/1) ... [2020-10-29 09:43:09,311 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:43:09,331 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:43:09,510 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:43:09,521 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:43:09,540 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:43:09,555 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:43:09,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:43:09 WrapperNode [2020-10-29 09:43:09,556 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:43:09,557 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:43:09,558 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:43:09,558 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:43:09,569 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:43:09" (1/1) ... [2020-10-29 09:43:09,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:43:09" (1/1) ... [2020-10-29 09:43:09,577 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:43:09" (1/1) ... [2020-10-29 09:43:09,577 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:43:09" (1/1) ... [2020-10-29 09:43:09,583 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:43:09" (1/1) ... [2020-10-29 09:43:09,587 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:43:09" (1/1) ... [2020-10-29 09:43:09,589 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:43:09" (1/1) ... [2020-10-29 09:43:09,591 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:43:09,592 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:43:09,592 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:43:09,592 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:43:09,593 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:43:09" (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 09:43:09,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:43:09,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:43:09,668 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:43:09,668 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 09:43:09,668 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 09:43:09,668 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:43:09,668 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:43:09,669 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:43:09,669 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 09:43:09,669 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 09:43:09,669 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:43:09,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:43:09,669 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 09:43:09,669 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 09:43:09,670 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 09:43:09,670 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:43:09,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:43:09,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:43:09,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:43:09,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:43:09,671 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:43:09,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:43:09,939 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:43:09,940 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 09:43:09,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:43:09 BoogieIcfgContainer [2020-10-29 09:43:09,942 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:43:09,947 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:43:09,948 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:43:09,958 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:43:09,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:43:09" (1/3) ... [2020-10-29 09:43:09,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49f40c43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:43:09, skipping insertion in model container [2020-10-29 09:43:09,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:43:09" (2/3) ... [2020-10-29 09:43:09,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49f40c43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:43:09, skipping insertion in model container [2020-10-29 09:43:09,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:43:09" (3/3) ... [2020-10-29 09:43:09,966 INFO L111 eAbstractionObserver]: Analyzing ICFG bhmr2007.i [2020-10-29 09:43:10,003 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:43:10,016 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:43:10,050 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:43:10,113 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:43:10,113 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:43:10,113 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:43:10,113 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:43:10,113 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:43:10,114 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:43:10,114 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:43:10,114 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:43:10,135 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-29 09:43:10,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-29 09:43:10,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:43:10,143 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:43:10,144 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:43:10,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:43:10,152 INFO L82 PathProgramCache]: Analyzing trace with hash -214259544, now seen corresponding path program 1 times [2020-10-29 09:43:10,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:43:10,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205433437] [2020-10-29 09:43:10,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:43:10,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:10,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:10,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:10,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-29 09:43:10,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:10,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-29 09:43:10,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:10,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:10,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:43:10,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:43:10,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:43:10,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:43:10,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:43:10,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:10,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:10,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:10,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:43:10,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:10,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 09:43:10,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:10,563 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:10,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:43:10,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:43:10,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:43:10,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:10,577 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 09:43:10,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205433437] [2020-10-29 09:43:10,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:43:10,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 09:43:10,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957077129] [2020-10-29 09:43:10,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-29 09:43:10,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:43:10,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-29 09:43:10,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-29 09:43:10,605 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2020-10-29 09:43:10,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:43:10,679 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2020-10-29 09:43:10,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-29 09:43:10,681 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-10-29 09:43:10,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:43:10,689 INFO L225 Difference]: With dead ends: 41 [2020-10-29 09:43:10,689 INFO L226 Difference]: Without dead ends: 17 [2020-10-29 09:43:10,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-29 09:43:10,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-29 09:43:10,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-29 09:43:10,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-29 09:43:10,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-29 09:43:10,738 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2020-10-29 09:43:10,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:43:10,739 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-29 09:43:10,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-29 09:43:10,739 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-29 09:43:10,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-29 09:43:10,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:43:10,740 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:43:10,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:43:10,741 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:43:10,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:43:10,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1386865443, now seen corresponding path program 1 times [2020-10-29 09:43:10,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:43:10,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666646511] [2020-10-29 09:43:10,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:43:10,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:10,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:11,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:11,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-29 09:43:11,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:11,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 267 [2020-10-29 09:43:11,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:11,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:11,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:43:11,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:43:11,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:43:11,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:43:11,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:43:11,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:11,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:11,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:11,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:43:11,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:11,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 09:43:11,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:11,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:11,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:43:11,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:43:11,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:43:11,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:43:11,285 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 09:43:11,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666646511] [2020-10-29 09:43:11,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:43:11,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 09:43:11,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11057068] [2020-10-29 09:43:11,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:43:11,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:43:11,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:43:11,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:43:11,290 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 8 states. [2020-10-29 09:43:11,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:43:11,727 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-10-29 09:43:11,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:43:11,727 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-10-29 09:43:11,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:43:11,730 INFO L225 Difference]: With dead ends: 26 [2020-10-29 09:43:11,730 INFO L226 Difference]: Without dead ends: 19 [2020-10-29 09:43:11,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:43:11,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-29 09:43:11,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-10-29 09:43:11,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-29 09:43:11,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-10-29 09:43:11,752 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2020-10-29 09:43:11,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:43:11,753 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-10-29 09:43:11,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:43:11,753 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-10-29 09:43:11,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-29 09:43:11,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:43:11,756 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 09:43:11,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:43:11,756 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:43:11,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:43:11,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1047281087, now seen corresponding path program 1 times [2020-10-29 09:43:11,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:43:11,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2110373171] [2020-10-29 09:43:11,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:43:11,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:11,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:11,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:11,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-29 09:43:11,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:11,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 201 [2020-10-29 09:43:11,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:11,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:11,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:43:11,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:43:11,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:43:11,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:43:12,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:43:12,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:12,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:12,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:12,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:43:12,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:12,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:43:12,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:12,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:12,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:43:12,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:43:12,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:43:12,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:43:12,246 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 09:43:12,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2110373171] [2020-10-29 09:43:12,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:43:12,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:43:12,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927881886] [2020-10-29 09:43:12,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:43:12,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:43:12,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:43:12,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:43:12,250 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 10 states. [2020-10-29 09:43:12,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:43:12,677 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-10-29 09:43:12,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:43:12,678 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-10-29 09:43:12,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:43:12,679 INFO L225 Difference]: With dead ends: 29 [2020-10-29 09:43:12,679 INFO L226 Difference]: Without dead ends: 22 [2020-10-29 09:43:12,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:43:12,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-29 09:43:12,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-29 09:43:12,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-29 09:43:12,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-29 09:43:12,693 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2020-10-29 09:43:12,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:43:12,693 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-29 09:43:12,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:43:12,693 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-29 09:43:12,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 09:43:12,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:43:12,696 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:43:12,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:43:12,696 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:43:12,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:43:12,697 INFO L82 PathProgramCache]: Analyzing trace with hash 862286429, now seen corresponding path program 2 times [2020-10-29 09:43:12,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:43:12,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360490493] [2020-10-29 09:43:12,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:43:12,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:12,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:12,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:12,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 09:43:12,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:12,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 207 [2020-10-29 09:43:12,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:12,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:12,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:43:12,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:43:12,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:43:12,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:13,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:43:13,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:13,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:13,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:13,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:43:13,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:13,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:43:13,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:13,178 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:13,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:43:13,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:43:13,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:43:13,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:43:13,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 09:43:13,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360490493] [2020-10-29 09:43:13,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:43:13,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:43:13,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981448944] [2020-10-29 09:43:13,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:43:13,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:43:13,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:43:13,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:43:13,187 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 11 states. [2020-10-29 09:43:13,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:43:13,662 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-10-29 09:43:13,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:43:13,662 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-10-29 09:43:13,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:43:13,663 INFO L225 Difference]: With dead ends: 21 [2020-10-29 09:43:13,663 INFO L226 Difference]: Without dead ends: 0 [2020-10-29 09:43:13,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:43:13,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-29 09:43:13,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-29 09:43:13,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-29 09:43:13,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-29 09:43:13,665 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2020-10-29 09:43:13,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:43:13,665 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-29 09:43:13,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:43:13,665 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-29 09:43:13,665 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-29 09:43:13,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:43:13,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-29 09:43:13,851 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2020-10-29 09:43:13,851 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 12) the Hoare annotation is: true [2020-10-29 09:43:13,851 INFO L274 CegarLoopResult]: For program point L12-1(line 12) no Hoare annotation was computed. [2020-10-29 09:43:13,851 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-10-29 09:43:13,852 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-10-29 09:43:13,852 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-29 09:43:13,852 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2020-10-29 09:43:13,852 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-29 09:43:13,852 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-29 09:43:13,852 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-29 09:43:13,852 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-29 09:43:13,853 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-29 09:43:13,853 INFO L274 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-10-29 09:43:13,853 INFO L274 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2020-10-29 09:43:13,853 INFO L274 CegarLoopResult]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2020-10-29 09:43:13,853 INFO L274 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2020-10-29 09:43:13,853 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 24 40) the Hoare annotation is: true [2020-10-29 09:43:13,853 INFO L274 CegarLoopResult]: For program point L29(lines 29 35) no Hoare annotation was computed. [2020-10-29 09:43:13,853 INFO L274 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-10-29 09:43:13,853 INFO L274 CegarLoopResult]: For program point L29-2(lines 29 35) no Hoare annotation was computed. [2020-10-29 09:43:13,854 INFO L270 CegarLoopResult]: At program point L28-2(lines 28 37) the Hoare annotation is: (let ((.cse0 (+ main_~a~0 main_~b~0)) (.cse1 (* 3 main_~i~0))) (and (<= .cse0 (* 3 main_~n~0)) (<= .cse1 .cse0) (<= .cse0 .cse1))) [2020-10-29 09:43:13,854 INFO L270 CegarLoopResult]: At program point L28-3(lines 28 37) the Hoare annotation is: (let ((.cse1 (* 3 main_~n~0)) (.cse0 (+ main_~a~0 main_~b~0))) (and (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-10-29 09:43:13,854 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 24 40) no Hoare annotation was computed. [2020-10-29 09:43:13,854 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 24 40) no Hoare annotation was computed. [2020-10-29 09:43:13,854 INFO L274 CegarLoopResult]: For program point L38(line 38) no Hoare annotation was computed. [2020-10-29 09:43:13,854 INFO L274 CegarLoopResult]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2020-10-29 09:43:13,854 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2020-10-29 09:43:13,855 INFO L274 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2020-10-29 09:43:13,855 INFO L270 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-29 09:43:13,855 INFO L274 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-10-29 09:43:13,855 INFO L274 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-10-29 09:43:13,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 09:43:13 BoogieIcfgContainer [2020-10-29 09:43:13,874 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-29 09:43:13,877 INFO L168 Benchmark]: Toolchain (without parser) took 4592.96 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 126.5 MB in the beginning and 99.7 MB in the end (delta: 26.8 MB). Peak memory consumption was 57.6 MB. Max. memory is 8.0 GB. [2020-10-29 09:43:13,878 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 151.0 MB. Free memory was 124.2 MB in the beginning and 124.2 MB in the end (delta: 84.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-29 09:43:13,879 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.41 ms. Allocated memory is still 151.0 MB. Free memory was 125.9 MB in the beginning and 116.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-29 09:43:13,880 INFO L168 Benchmark]: Boogie Preprocessor took 33.82 ms. Allocated memory is still 151.0 MB. Free memory was 116.4 MB in the beginning and 115.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-29 09:43:13,881 INFO L168 Benchmark]: RCFGBuilder took 350.14 ms. Allocated memory is still 151.0 MB. Free memory was 114.8 MB in the beginning and 100.7 MB in the end (delta: 14.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-10-29 09:43:13,882 INFO L168 Benchmark]: TraceAbstraction took 3927.00 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 100.3 MB in the beginning and 99.7 MB in the end (delta: 603.3 kB). Peak memory consumption was 31.4 MB. Max. memory is 8.0 GB. [2020-10-29 09:43:13,886 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 151.0 MB. Free memory was 124.2 MB in the beginning and 124.2 MB in the end (delta: 84.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 266.41 ms. Allocated memory is still 151.0 MB. Free memory was 125.9 MB in the beginning and 116.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.82 ms. Allocated memory is still 151.0 MB. Free memory was 116.4 MB in the beginning and 115.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 350.14 ms. Allocated memory is still 151.0 MB. Free memory was 114.8 MB in the beginning and 100.7 MB in the end (delta: 14.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3927.00 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 100.3 MB in the beginning and 99.7 MB in the end (delta: 603.3 kB). Peak memory consumption was 31.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: (a + b <= 3 * n && 3 * i <= a + b) && a + b <= 3 * i - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.5s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 54 SDtfs, 61 SDslu, 101 SDs, 0 SdLazy, 204 SolverSat, 32 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 56 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 18 PreInvPairs, 23 NumberOfFragments, 70 HoareAnnotationTreeSize, 18 FomulaSimplifications, 197 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 151 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 65 NumberOfCodeBlocks, 65 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 61 ConstructedInterpolants, 0 QuantifiedInterpolants, 7762 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 1/6 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...