/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/float-benchs/interpolation.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:39:48,437 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:39:48,440 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:39:48,476 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:39:48,476 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:39:48,478 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:39:48,479 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:39:48,482 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:39:48,484 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:39:48,486 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:39:48,487 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:39:48,489 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:39:48,489 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:39:48,491 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:39:48,492 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:39:48,493 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:39:48,495 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:39:48,526 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:39:48,528 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:39:48,530 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:39:48,532 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:39:48,534 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:39:48,535 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:39:48,536 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:39:48,546 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:39:48,546 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:39:48,547 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:39:48,550 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:39:48,551 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:39:48,552 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:39:48,553 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:39:48,553 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:39:48,555 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:39:48,556 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:39:48,558 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:39:48,559 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:39:48,559 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:39:48,560 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:39:48,560 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:39:48,561 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:39:48,562 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:39:48,564 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 19:39:48,625 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:39:48,625 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:39:48,628 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:39:48,628 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:39:48,629 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:39:48,631 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:39:48,631 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:39:48,632 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:39:48,632 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:39:48,632 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:39:48,634 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:39:48,634 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:39:48,634 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:39:48,634 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:39:48,635 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:39:48,635 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:39:48,635 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:39:48,636 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:39:48,636 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:39:48,637 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:39:48,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:39:48,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:39:48,638 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:39:48,638 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:39:48,638 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:39:48,638 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:39:48,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:39:48,639 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:39:48,639 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:39:48,639 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:39:49,092 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:39:49,119 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:39:49,122 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:39:49,123 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:39:49,124 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:39:49,125 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/interpolation.c [2020-10-27 19:39:49,213 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fa1636356/c945c208ce3c4982a0007d1df7f9b2ca/FLAG4c1040821 [2020-10-27 19:39:49,884 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:39:49,885 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-benchs/interpolation.c [2020-10-27 19:39:49,892 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fa1636356/c945c208ce3c4982a0007d1df7f9b2ca/FLAG4c1040821 [2020-10-27 19:39:49,908 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fa1636356/c945c208ce3c4982a0007d1df7f9b2ca [2020-10-27 19:39:49,911 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:39:49,917 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:39:49,918 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:39:49,919 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:39:49,923 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:39:49,924 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:39:49" (1/1) ... [2020-10-27 19:39:49,927 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@276e0545 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:39:49, skipping insertion in model container [2020-10-27 19:39:49,927 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:39:49" (1/1) ... [2020-10-27 19:39:49,936 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:39:49,951 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:39:50,127 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:39:50,136 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:39:50,161 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:39:50,178 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:39:50,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:39:50 WrapperNode [2020-10-27 19:39:50,179 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:39:50,180 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:39:50,181 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:39:50,181 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:39:50,196 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:39:50" (1/1) ... [2020-10-27 19:39:50,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:39:50" (1/1) ... [2020-10-27 19:39:50,206 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:39:50" (1/1) ... [2020-10-27 19:39:50,206 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:39:50" (1/1) ... [2020-10-27 19:39:50,217 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:39:50" (1/1) ... [2020-10-27 19:39:50,222 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:39:50" (1/1) ... [2020-10-27 19:39:50,224 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:39:50" (1/1) ... [2020-10-27 19:39:50,227 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:39:50,228 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:39:50,228 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:39:50,228 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:39:50,229 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:39:50" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:39:50,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:39:50,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:39:50,296 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:39:50,296 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 19:39:50,296 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 19:39:50,296 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:39:50,296 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:39:50,297 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:39:50,297 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:39:50,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:39:50,297 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-10-27 19:39:50,297 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 19:39:50,297 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 19:39:50,298 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:39:50,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-10-27 19:39:50,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-10-27 19:39:50,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:39:50,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:39:50,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:39:50,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:39:50,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:39:50,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:39:50,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-27 19:39:50,790 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:39:50,790 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 19:39:50,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:39:50 BoogieIcfgContainer [2020-10-27 19:39:50,793 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:39:50,796 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:39:50,797 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:39:50,801 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:39:50,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:39:49" (1/3) ... [2020-10-27 19:39:50,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d3cab2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:39:50, skipping insertion in model container [2020-10-27 19:39:50,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:39:50" (2/3) ... [2020-10-27 19:39:50,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d3cab2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:39:50, skipping insertion in model container [2020-10-27 19:39:50,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:39:50" (3/3) ... [2020-10-27 19:39:50,807 INFO L111 eAbstractionObserver]: Analyzing ICFG interpolation.c [2020-10-27 19:39:50,821 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:39:50,826 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:39:50,840 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:39:50,884 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:39:50,885 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:39:50,885 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:39:50,885 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:39:50,885 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:39:50,885 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:39:50,885 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:39:50,886 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:39:50,908 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-27 19:39:50,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 19:39:50,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:39:50,917 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:39:50,918 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:39:50,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:39:50,927 INFO L82 PathProgramCache]: Analyzing trace with hash -538560238, now seen corresponding path program 1 times [2020-10-27 19:39:50,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:39:50,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303368670] [2020-10-27 19:39:50,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:39:51,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:39:51,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:39:51,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:39:51,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:39:51,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 19:39:51,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:39:51,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-10-27 19:39:51,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:39:51,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:39:51,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 19:39:51,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:39:51,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 19:39:51,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:39:51,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:39:51,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:39:51,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:39:51,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:39:51,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:39:51,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 19:39:51,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:39:51,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:39:51,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:39:51,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:39:51,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:39:51,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 19:39:51,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:39:51,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:39:51,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:39:51,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:39:51,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 19:39:51,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:39:51,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:39:51,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:39:51,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:39:51,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-27 19:39:51,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:39:51,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:39:51,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:39:51,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303368670] [2020-10-27 19:39:51,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:39:51,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 19:39:51,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280293659] [2020-10-27 19:39:51,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 19:39:51,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:39:51,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 19:39:51,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 19:39:51,537 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-10-27 19:39:51,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:39:51,639 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2020-10-27 19:39:51,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 19:39:51,641 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-10-27 19:39:51,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:39:51,649 INFO L225 Difference]: With dead ends: 53 [2020-10-27 19:39:51,649 INFO L226 Difference]: Without dead ends: 23 [2020-10-27 19:39:51,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 19:39:51,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-27 19:39:51,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-27 19:39:51,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 19:39:51,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-27 19:39:51,692 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2020-10-27 19:39:51,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:39:51,692 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-27 19:39:51,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 19:39:51,693 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-27 19:39:51,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 19:39:51,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:39:51,694 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:39:51,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:39:51,694 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:39:51,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:39:51,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1010101559, now seen corresponding path program 1 times [2020-10-27 19:39:51,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:39:51,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555183104] [2020-10-27 19:39:51,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:39:51,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:39:51,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:39:51,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:39:52,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:39:52,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 19:39:52,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:39:52,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 434 [2020-10-27 19:39:52,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:39:52,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:39:52,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 19:39:52,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:39:52,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:39:52,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:39:52,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:39:52,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:39:52,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:39:52,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:39:52,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:39:52,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 19:39:52,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:39:52,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:39:52,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:39:52,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:39:52,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:39:52,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 19:39:52,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:39:52,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:39:52,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:39:52,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 19:39:52,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:39:52,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:39:52,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:39:52,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:39:52,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:39:52,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:39:52,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:39:52,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:39:52,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555183104] [2020-10-27 19:39:52,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:39:52,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:39:52,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286518298] [2020-10-27 19:39:52,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:39:52,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:39:52,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:39:52,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:39:52,266 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 4 states. [2020-10-27 19:39:52,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:39:52,342 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2020-10-27 19:39:52,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:39:52,342 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-27 19:39:52,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:39:52,345 INFO L225 Difference]: With dead ends: 35 [2020-10-27 19:39:52,345 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 19:39:52,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:39:52,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 19:39:52,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2020-10-27 19:39:52,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-27 19:39:52,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-27 19:39:52,356 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 20 [2020-10-27 19:39:52,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:39:52,356 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-27 19:39:52,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:39:52,357 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-27 19:39:52,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 19:39:52,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:39:52,358 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:39:52,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 19:39:52,358 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:39:52,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:39:52,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1185756991, now seen corresponding path program 1 times [2020-10-27 19:39:52,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:39:52,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388323227] [2020-10-27 19:39:52,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:39:52,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:39:52,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:39:52,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:39:52,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 19:39:52,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:39:52,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-27 19:39:52,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:39:52,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:39:52,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 19:39:52,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 19:39:52,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:39:52,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:39:52,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:39:52,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:39:52,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:39:52,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:39:52,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:39:52,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 19:39:52,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:39:52,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:39:52,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:39:52,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:39:52,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:39:52,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 19:39:52,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:39:52,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:39:52,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:39:52,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 19:39:52,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:39:52,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 19:39:52,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:39:52,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:39:52,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 19:39:52,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 19:39:52,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:39:52,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:39:52,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388323227] [2020-10-27 19:39:52,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:39:52,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 19:39:52,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403037318] [2020-10-27 19:39:52,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:39:52,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:39:52,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:39:52,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:39:52,588 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2020-10-27 19:39:52,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:39:52,734 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-10-27 19:39:52,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 19:39:52,735 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-27 19:39:52,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:39:52,736 INFO L225 Difference]: With dead ends: 37 [2020-10-27 19:39:52,736 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 19:39:52,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:39:52,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 19:39:52,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-27 19:39:52,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-27 19:39:52,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-27 19:39:52,749 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2020-10-27 19:39:52,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:39:52,749 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-27 19:39:52,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:39:52,750 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-27 19:39:52,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 19:39:52,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:39:52,751 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:39:52,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 19:39:52,751 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:39:52,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:39:52,752 INFO L82 PathProgramCache]: Analyzing trace with hash 94106687, now seen corresponding path program 1 times [2020-10-27 19:39:52,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:39:52,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1754762206] [2020-10-27 19:39:52,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:39:52,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 19:39:52,769 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 19:39:52,770 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 19:39:52,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 19:39:52,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 07:39:52 BoogieIcfgContainer [2020-10-27 19:39:52,790 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 19:39:52,793 INFO L168 Benchmark]: Toolchain (without parser) took 2879.54 ms. Allocated memory is still 152.0 MB. Free memory was 127.0 MB in the beginning and 66.5 MB in the end (delta: 60.5 MB). Peak memory consumption was 61.4 MB. Max. memory is 8.0 GB. [2020-10-27 19:39:52,794 INFO L168 Benchmark]: CDTParser took 0.62 ms. Allocated memory is still 152.0 MB. Free memory is still 123.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 19:39:52,795 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.18 ms. Allocated memory is still 152.0 MB. Free memory was 126.3 MB in the beginning and 116.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-27 19:39:52,796 INFO L168 Benchmark]: Boogie Preprocessor took 46.91 ms. Allocated memory is still 152.0 MB. Free memory was 116.4 MB in the beginning and 114.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-27 19:39:52,796 INFO L168 Benchmark]: RCFGBuilder took 565.32 ms. Allocated memory is still 152.0 MB. Free memory was 114.8 MB in the beginning and 129.7 MB in the end (delta: -14.9 MB). Peak memory consumption was 15.5 MB. Max. memory is 8.0 GB. [2020-10-27 19:39:52,797 INFO L168 Benchmark]: TraceAbstraction took 1994.17 ms. Allocated memory is still 152.0 MB. Free memory was 129.1 MB in the beginning and 66.5 MB in the end (delta: 62.7 MB). Peak memory consumption was 62.7 MB. Max. memory is 8.0 GB. [2020-10-27 19:39:52,801 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.62 ms. Allocated memory is still 152.0 MB. Free memory is still 123.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 261.18 ms. Allocated memory is still 152.0 MB. Free memory was 126.3 MB in the beginning and 116.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 46.91 ms. Allocated memory is still 152.0 MB. Free memory was 116.4 MB in the beginning and 114.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 565.32 ms. Allocated memory is still 152.0 MB. Free memory was 114.8 MB in the beginning and 129.7 MB in the end (delta: -14.9 MB). Peak memory consumption was 15.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1994.17 ms. Allocated memory is still 152.0 MB. Free memory was 129.1 MB in the beginning and 66.5 MB in the end (delta: 62.7 MB). Peak memory consumption was 62.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 26, overapproximation of to_real at line 15, overapproximation of someBinaryArithmeticFLOAToperation at line 24. Possible FailurePath: [L13] int i; [L14] float z, t; [L15] float min[] = { 5, 10, 12, 30, 150 }; [L16] float max[] = { 10, 12, 30, 150, 300 }; [L18] t = __VERIFIER_nondet_float() [L19] EXPR min[0] [L19] EXPR t >= min[0] && t <= max[sizeof(max) / sizeof(max[0]) - 1] [L19] EXPR max[sizeof(max) / sizeof(max[0]) - 1] [L19] EXPR t >= min[0] && t <= max[sizeof(max) / sizeof(max[0]) - 1] [L19] CALL assume_abort_if_not(t >= min[0] && t <= max[sizeof(max) / sizeof(max[0]) - 1]) [L7] COND FALSE !(!cond) [L19] RET assume_abort_if_not(t >= min[0] && t <= max[sizeof(max) / sizeof(max[0]) - 1]) [L21] i = 0 [L21] COND TRUE i < sizeof(min) / sizeof(min[0]) [L22] EXPR max[i] [L22] COND TRUE t <= max[i] [L24] EXPR min[i] [L24] EXPR max[i] [L24] EXPR min[i] [L24] z = (t - min[i]) / (max[i] - min[i]) [L26] CALL __VERIFIER_assert(z >= 0.f && z <= 1.f) [L9] COND TRUE !(cond) [L9] CALL reach_error() [L3] __assert_fail("0", "interpolation.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.8s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 72 SDtfs, 26 SDslu, 64 SDs, 0 SdLazy, 86 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred 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, 3 MinimizatonAttempts, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 82 NumberOfCodeBlocks, 82 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 58 ConstructedInterpolants, 0 QuantifiedInterpolants, 3080 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...