/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/float-benchs/interpolation2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:23:27,543 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:23:27,548 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:23:27,607 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:23:27,608 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:23:27,610 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:23:27,615 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:23:27,623 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:23:27,627 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:23:27,633 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:23:27,635 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:23:27,637 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:23:27,637 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:23:27,641 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:23:27,643 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:23:27,645 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:23:27,646 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:23:27,650 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:23:27,658 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:23:27,667 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:23:27,669 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:23:27,671 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:23:27,672 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:23:27,675 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:23:27,678 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:23:27,679 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:23:27,679 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:23:27,687 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:23:27,688 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:23:27,689 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:23:27,689 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:23:27,690 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:23:27,693 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:23:27,694 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:23:27,695 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:23:27,696 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:23:27,697 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:23:27,697 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:23:27,697 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:23:27,698 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:23:27,699 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:23:27,700 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 14:23:27,764 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:23:27,764 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:23:27,769 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:23:27,769 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:23:27,770 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:23:27,770 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:23:27,770 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:23:27,771 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:23:27,771 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:23:27,772 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:23:27,773 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:23:27,773 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:23:27,773 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:23:27,773 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:23:27,774 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:23:27,774 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:23:27,774 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:23:27,775 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:23:27,775 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:23:27,775 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:23:27,776 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:23:27,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:23:27,776 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:23:27,776 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:23:27,777 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:23:27,777 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:23:27,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:23:27,777 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:23:27,778 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:23:27,778 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:23:28,242 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:23:28,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:23:28,273 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:23:28,275 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:23:28,281 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:23:28,282 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/interpolation2.c [2020-10-28 14:23:28,381 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3a1a371b7/4ba220ed48e94775a1ad952639cc8fee/FLAG9235080cc [2020-10-28 14:23:29,112 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:23:29,113 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-benchs/interpolation2.c [2020-10-28 14:23:29,121 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3a1a371b7/4ba220ed48e94775a1ad952639cc8fee/FLAG9235080cc [2020-10-28 14:23:29,445 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3a1a371b7/4ba220ed48e94775a1ad952639cc8fee [2020-10-28 14:23:29,450 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:23:29,457 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:23:29,459 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:23:29,459 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:23:29,465 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:23:29,466 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:23:29" (1/1) ... [2020-10-28 14:23:29,469 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a450074 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:29, skipping insertion in model container [2020-10-28 14:23:29,469 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:23:29" (1/1) ... [2020-10-28 14:23:29,478 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:23:29,493 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:23:29,693 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:23:29,703 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:23:29,733 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:23:29,756 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:23:29,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:29 WrapperNode [2020-10-28 14:23:29,756 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:23:29,757 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:23:29,757 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:23:29,758 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:23:29,771 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:29" (1/1) ... [2020-10-28 14:23:29,772 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:29" (1/1) ... [2020-10-28 14:23:29,782 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:29" (1/1) ... [2020-10-28 14:23:29,782 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:29" (1/1) ... [2020-10-28 14:23:29,796 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:29" (1/1) ... [2020-10-28 14:23:29,801 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:29" (1/1) ... [2020-10-28 14:23:29,803 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:29" (1/1) ... [2020-10-28 14:23:29,807 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:23:29,808 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:23:29,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:23:29,808 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:23:29,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:29" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:23:29,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:23:29,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:23:29,908 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:23:29,909 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 14:23:29,909 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 14:23:29,909 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:23:29,909 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:23:29,909 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:23:29,910 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:23:29,910 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:23:29,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-10-28 14:23:29,910 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 14:23:29,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 14:23:29,910 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:23:29,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-10-28 14:23:29,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-10-28 14:23:29,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:23:29,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:23:29,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:23:29,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:23:29,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-28 14:23:29,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:23:29,913 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:23:30,423 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:23:30,423 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 14:23:30,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:23:30 BoogieIcfgContainer [2020-10-28 14:23:30,426 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:23:30,429 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:23:30,430 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:23:30,436 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:23:30,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:23:29" (1/3) ... [2020-10-28 14:23:30,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e66f840 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:23:30, skipping insertion in model container [2020-10-28 14:23:30,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:29" (2/3) ... [2020-10-28 14:23:30,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e66f840 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:23:30, skipping insertion in model container [2020-10-28 14:23:30,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:23:30" (3/3) ... [2020-10-28 14:23:30,443 INFO L111 eAbstractionObserver]: Analyzing ICFG interpolation2.c [2020-10-28 14:23:30,460 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:23:30,467 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:23:30,484 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:23:30,529 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:23:30,529 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:23:30,529 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:23:30,530 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:23:30,530 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:23:30,530 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:23:30,530 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:23:30,530 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:23:30,556 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-28 14:23:30,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 14:23:30,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:23:30,566 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] [2020-10-28 14:23:30,566 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:23:30,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:23:30,578 INFO L82 PathProgramCache]: Analyzing trace with hash -538560238, now seen corresponding path program 1 times [2020-10-28 14:23:30,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:23:30,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424321969] [2020-10-28 14:23:30,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:23:30,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:23:30,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:23:30,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:23:31,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:23:31,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 14:23:31,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:23:31,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 254 [2020-10-28 14:23:31,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:23:31,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:23:31,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:23:31,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 14:23:31,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:23:31,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:23:31,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:23:31,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:23:31,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:23:31,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:23:31,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:23:31,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:23:31,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 14:23:31,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:23:31,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:23:31,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:23:31,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:23:31,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:23:31,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:23:31,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 14:23:31,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:23:31,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:23:31,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:23:31,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:23:31,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:23:31,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:23:31,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:23:31,235 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:23:31,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:23:31,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-28 14:23:31,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:23:31,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:23:31,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:23:31,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424321969] [2020-10-28 14:23:31,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:23:31,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:23:31,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883064056] [2020-10-28 14:23:31,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 14:23:31,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:23:31,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 14:23:31,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:23:31,271 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-10-28 14:23:31,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:23:31,356 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2020-10-28 14:23:31,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 14:23:31,358 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-10-28 14:23:31,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:23:31,366 INFO L225 Difference]: With dead ends: 53 [2020-10-28 14:23:31,366 INFO L226 Difference]: Without dead ends: 23 [2020-10-28 14:23:31,370 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 [2020-10-28 14:23:31,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-28 14:23:31,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-28 14:23:31,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-28 14:23:31,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-28 14:23:31,414 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2020-10-28 14:23:31,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:23:31,414 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-28 14:23:31,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 14:23:31,414 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-28 14:23:31,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 14:23:31,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:23:31,416 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] [2020-10-28 14:23:31,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:23:31,416 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:23:31,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:23:31,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1010101559, now seen corresponding path program 1 times [2020-10-28 14:23:31,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:23:31,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812501614] [2020-10-28 14:23:31,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:23:31,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:23:31,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:23:31,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:23:31,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:23:31,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 14:23:31,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:23:31,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 451 [2020-10-28 14:23:31,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:23:31,890 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:23:31,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:23:31,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 14:23:31,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:23:31,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-28 14:23:31,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:23:31,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:23:31,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:23:31,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:23:31,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:23:31,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:23:31,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:23:31,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:23:31,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:23:31,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:23:31,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:23:31,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:23:31,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:23:31,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 14:23:31,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:23:31,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:23:31,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:23:31,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:23:31,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:23:31,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:23:31,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:23:31,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:23:31,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:23:31,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:23:31,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:23:31,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:23:31,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:23:31,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812501614] [2020-10-28 14:23:31,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:23:31,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:23:31,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717939171] [2020-10-28 14:23:31,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:23:31,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:23:31,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:23:31,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:23:31,987 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 4 states. [2020-10-28 14:23:32,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:23:32,059 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2020-10-28 14:23:32,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:23:32,060 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-28 14:23:32,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:23:32,062 INFO L225 Difference]: With dead ends: 35 [2020-10-28 14:23:32,062 INFO L226 Difference]: Without dead ends: 28 [2020-10-28 14:23:32,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:23:32,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-28 14:23:32,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2020-10-28 14:23:32,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-28 14:23:32,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-28 14:23:32,072 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 20 [2020-10-28 14:23:32,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:23:32,073 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-28 14:23:32,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:23:32,073 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-28 14:23:32,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 14:23:32,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:23:32,074 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:23:32,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:23:32,074 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:23:32,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:23:32,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1185756991, now seen corresponding path program 1 times [2020-10-28 14:23:32,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:23:32,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095567421] [2020-10-28 14:23:32,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:23:32,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:23:32,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:23:32,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:23:32,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 14:23:32,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:23:32,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-28 14:23:32,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:23:32,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:23:32,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:23:32,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 14:23:32,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:23:32,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:23:32,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:23:32,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:23:32,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:23:32,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:23:32,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:23:32,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:23:32,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:23:32,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:23:32,263 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:23:32,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:23:32,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:23:32,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:23:32,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:23:32,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 14:23:32,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:23:32,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:23:32,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:23:32,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:23:32,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:23:32,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:23:32,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:23:32,280 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:23:32,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:23:32,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:23:32,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:23:32,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:23:32,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:23:32,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095567421] [2020-10-28 14:23:32,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:23:32,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:23:32,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300261402] [2020-10-28 14:23:32,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:23:32,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:23:32,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:23:32,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:23:32,303 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2020-10-28 14:23:32,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:23:32,465 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-10-28 14:23:32,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:23:32,466 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-28 14:23:32,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:23:32,467 INFO L225 Difference]: With dead ends: 37 [2020-10-28 14:23:32,467 INFO L226 Difference]: Without dead ends: 24 [2020-10-28 14:23:32,468 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 [2020-10-28 14:23:32,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-28 14:23:32,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-28 14:23:32,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-28 14:23:32,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-28 14:23:32,476 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2020-10-28 14:23:32,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:23:32,477 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-28 14:23:32,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:23:32,477 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-28 14:23:32,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 14:23:32,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:23:32,478 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:23:32,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:23:32,478 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:23:32,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:23:32,479 INFO L82 PathProgramCache]: Analyzing trace with hash 94106687, now seen corresponding path program 1 times [2020-10-28 14:23:32,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:23:32,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486559919] [2020-10-28 14:23:32,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:23:32,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-28 14:23:32,494 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-28 14:23:32,495 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-28 14:23:32,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:23:32,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 02:23:32 BoogieIcfgContainer [2020-10-28 14:23:32,515 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 14:23:32,518 INFO L168 Benchmark]: Toolchain (without parser) took 3064.80 ms. Allocated memory is still 165.7 MB. Free memory was 141.2 MB in the beginning and 131.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.8 MB. Max. memory is 8.0 GB. [2020-10-28 14:23:32,519 INFO L168 Benchmark]: CDTParser took 0.56 ms. Allocated memory is still 125.8 MB. Free memory is still 100.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 14:23:32,520 INFO L168 Benchmark]: CACSL2BoogieTranslator took 297.60 ms. Allocated memory is still 165.7 MB. Free memory was 140.4 MB in the beginning and 130.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-28 14:23:32,521 INFO L168 Benchmark]: Boogie Preprocessor took 49.61 ms. Allocated memory is still 165.7 MB. Free memory was 130.4 MB in the beginning and 128.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-28 14:23:32,521 INFO L168 Benchmark]: RCFGBuilder took 618.03 ms. Allocated memory is still 165.7 MB. Free memory was 128.5 MB in the beginning and 146.4 MB in the end (delta: -18.0 MB). Peak memory consumption was 19.1 MB. Max. memory is 8.0 GB. [2020-10-28 14:23:32,522 INFO L168 Benchmark]: TraceAbstraction took 2086.17 ms. Allocated memory is still 165.7 MB. Free memory was 145.9 MB in the beginning and 131.1 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 8.0 GB. [2020-10-28 14:23:32,525 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.56 ms. Allocated memory is still 125.8 MB. Free memory is still 100.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 297.60 ms. Allocated memory is still 165.7 MB. Free memory was 140.4 MB in the beginning and 130.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 49.61 ms. Allocated memory is still 165.7 MB. Free memory was 130.4 MB in the beginning and 128.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 618.03 ms. Allocated memory is still 165.7 MB. Free memory was 128.5 MB in the beginning and 146.4 MB in the end (delta: -18.0 MB). Peak memory consumption was 19.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2086.17 ms. Allocated memory is still 165.7 MB. Free memory was 145.9 MB in the beginning and 131.1 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.8 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 28, overapproximation of to_real at line 15, overapproximation of someBinaryArithmeticFLOAToperation at line 26. 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 }; [L17] float org[] = { 1, 5, -10, 30, 20 }; [L18] float slope[] = { 4, -15, 40, -10, 0 }; [L20] t = __VERIFIER_nondet_float() [L21] EXPR min[0] [L21] EXPR t >= min[0] && t <= max[sizeof(max) / sizeof(max[0]) - 1] [L21] EXPR max[sizeof(max) / sizeof(max[0]) - 1] [L21] EXPR t >= min[0] && t <= max[sizeof(max) / sizeof(max[0]) - 1] [L21] CALL assume_abort_if_not(t >= min[0] && t <= max[sizeof(max) / sizeof(max[0]) - 1]) [L7] COND FALSE !(!cond) [L21] RET assume_abort_if_not(t >= min[0] && t <= max[sizeof(max) / sizeof(max[0]) - 1]) [L23] i = 0 [L23] COND TRUE i < sizeof(min) / sizeof(min[0]) [L24] EXPR max[i] [L24] COND TRUE t <= max[i] [L26] EXPR org[i] [L26] EXPR slope[i] [L26] EXPR min[i] [L26] EXPR max[i] [L26] EXPR min[i] [L26] z = org[i] + slope[i] * (t - min[i]) / (max[i] - min[i]) [L28] CALL __VERIFIER_assert(z >= -10.f && z <= 30.f) [L9] COND TRUE !(cond) [L9] CALL reach_error() [L3] __assert_fail("0", "interpolation2.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: 1.9s, 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, 0.1s 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...