/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/float-benchs/inv_square_int.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:04:10,966 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:04:10,969 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:04:11,017 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:04:11,018 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:04:11,024 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:04:11,026 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:04:11,030 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:04:11,033 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:04:11,039 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:04:11,040 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:04:11,041 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:04:11,042 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:04:11,044 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:04:11,047 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:04:11,050 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:04:11,051 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:04:11,054 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:04:11,060 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:04:11,068 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:04:11,070 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:04:11,072 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:04:11,073 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:04:11,076 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:04:11,084 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:04:11,084 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:04:11,084 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:04:11,086 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:04:11,087 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:04:11,088 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:04:11,088 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:04:11,089 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:04:11,091 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:04:11,091 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:04:11,092 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:04:11,093 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:04:11,093 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:04:11,093 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:04:11,094 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:04:11,095 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:04:11,095 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:04:11,102 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 09:04:11,153 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:04:11,153 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:04:11,157 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:04:11,157 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:04:11,157 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:04:11,157 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:04:11,157 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:04:11,158 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:04:11,158 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:04:11,158 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:04:11,159 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:04:11,159 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:04:11,159 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:04:11,160 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:04:11,160 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:04:11,160 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:04:11,160 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:04:11,160 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:04:11,161 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:04:11,161 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:04:11,161 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:04:11,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:04:11,161 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:04:11,162 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:04:11,162 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:04:11,162 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:04:11,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:04:11,162 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:04:11,162 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:04:11,163 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:04:11,580 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:04:11,625 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:04:11,628 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:04:11,630 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:04:11,631 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:04:11,633 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/inv_square_int.c [2020-10-29 09:04:11,717 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/17b9d21b6/2aa789b0a96949fca22e35a51adb13b1/FLAG3db201d93 [2020-10-29 09:04:12,395 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:04:12,395 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-benchs/inv_square_int.c [2020-10-29 09:04:12,401 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/17b9d21b6/2aa789b0a96949fca22e35a51adb13b1/FLAG3db201d93 [2020-10-29 09:04:12,781 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/17b9d21b6/2aa789b0a96949fca22e35a51adb13b1 [2020-10-29 09:04:12,784 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:04:12,791 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:04:12,793 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:04:12,794 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:04:12,801 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:04:12,802 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:04:12" (1/1) ... [2020-10-29 09:04:12,807 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@132a9d6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:04:12, skipping insertion in model container [2020-10-29 09:04:12,808 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:04:12" (1/1) ... [2020-10-29 09:04:12,818 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:04:12,835 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:04:13,060 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:04:13,071 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:04:13,091 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:04:13,112 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:04:13,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:04:13 WrapperNode [2020-10-29 09:04:13,114 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:04:13,117 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:04:13,118 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:04:13,118 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:04:13,134 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:04:13" (1/1) ... [2020-10-29 09:04:13,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:04:13" (1/1) ... [2020-10-29 09:04:13,148 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:04:13" (1/1) ... [2020-10-29 09:04:13,148 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:04:13" (1/1) ... [2020-10-29 09:04:13,164 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:04:13" (1/1) ... [2020-10-29 09:04:13,169 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:04:13" (1/1) ... [2020-10-29 09:04:13,177 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:04:13" (1/1) ... [2020-10-29 09:04:13,180 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:04:13,185 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:04:13,185 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:04:13,186 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:04:13,187 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:04:13" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:04:13,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:04:13,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:04:13,280 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:04:13,280 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 09:04:13,281 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 09:04:13,281 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:04:13,281 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:04:13,282 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:04:13,282 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:04:13,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:04:13,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 09:04:13,284 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 09:04:13,284 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 09:04:13,284 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:04:13,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:04:13,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:04:13,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:04:13,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:04:13,286 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:04:13,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:04:13,792 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:04:13,793 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 09:04:13,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:04:13 BoogieIcfgContainer [2020-10-29 09:04:13,795 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:04:13,799 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:04:13,800 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:04:13,803 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:04:13,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:04:12" (1/3) ... [2020-10-29 09:04:13,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cf54204 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:04:13, skipping insertion in model container [2020-10-29 09:04:13,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:04:13" (2/3) ... [2020-10-29 09:04:13,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cf54204 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:04:13, skipping insertion in model container [2020-10-29 09:04:13,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:04:13" (3/3) ... [2020-10-29 09:04:13,807 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square_int.c [2020-10-29 09:04:13,819 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:04:13,824 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:04:13,838 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:04:13,878 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:04:13,878 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:04:13,878 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:04:13,878 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:04:13,878 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:04:13,879 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:04:13,879 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:04:13,879 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:04:13,898 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-10-29 09:04:13,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-29 09:04:13,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:04:13,905 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:04:13,905 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:04:13,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:04:13,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1606917049, now seen corresponding path program 1 times [2020-10-29 09:04:13,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:04:13,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1500592509] [2020-10-29 09:04:13,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:04:14,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:04:14,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:04:14,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:04:14,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-29 09:04:14,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:04:14,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-10-29 09:04:14,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:04:14,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:04:14,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:04:14,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:04:14,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:04:14,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:04:14,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:04:14,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:04:14,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:04:14,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:04:14,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:04:14,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:04:14,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 09:04:14,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:04:14,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:04:14,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:04:14,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:04:14,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:04:14,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:04:14,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-29 09:04:14,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:04:14,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:04:14,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:04:14,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 09:04:14,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:04:14,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:04:14,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:04:14,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:04:14,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:04:14,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-29 09:04:14,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:04:14,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:04:14,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:04:14,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1500592509] [2020-10-29 09:04:14,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:04:14,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 09:04:14,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382736878] [2020-10-29 09:04:14,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-29 09:04:14,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:04:14,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-29 09:04:14,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-29 09:04:14,402 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2020-10-29 09:04:14,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:04:14,486 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2020-10-29 09:04:14,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-29 09:04:14,488 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-29 09:04:14,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:04:14,496 INFO L225 Difference]: With dead ends: 44 [2020-10-29 09:04:14,496 INFO L226 Difference]: Without dead ends: 18 [2020-10-29 09:04:14,499 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 [2020-10-29 09:04:14,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-29 09:04:14,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-29 09:04:14,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-29 09:04:14,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 17 transitions. [2020-10-29 09:04:14,543 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 17 transitions. Word has length 17 [2020-10-29 09:04:14,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:04:14,544 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 17 transitions. [2020-10-29 09:04:14,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-29 09:04:14,544 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 17 transitions. [2020-10-29 09:04:14,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-29 09:04:14,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:04:14,545 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:04:14,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:04:14,546 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:04:14,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:04:14,547 INFO L82 PathProgramCache]: Analyzing trace with hash -926858679, now seen corresponding path program 1 times [2020-10-29 09:04:14,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:04:14,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413742035] [2020-10-29 09:04:14,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:04:14,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-29 09:04:14,583 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-29 09:04:14,583 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-29 09:04:14,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:04:14,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 09:04:14 BoogieIcfgContainer [2020-10-29 09:04:14,604 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-29 09:04:14,607 INFO L168 Benchmark]: Toolchain (without parser) took 1819.73 ms. Allocated memory is still 156.2 MB. Free memory was 132.2 MB in the beginning and 119.9 MB in the end (delta: 12.4 MB). Peak memory consumption was 13.3 MB. Max. memory is 8.0 GB. [2020-10-29 09:04:14,608 INFO L168 Benchmark]: CDTParser took 0.62 ms. Allocated memory is still 125.8 MB. Free memory is still 84.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-29 09:04:14,609 INFO L168 Benchmark]: CACSL2BoogieTranslator took 321.35 ms. Allocated memory is still 156.2 MB. Free memory was 131.6 MB in the beginning and 121.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-29 09:04:14,610 INFO L168 Benchmark]: Boogie Preprocessor took 62.55 ms. Allocated memory is still 156.2 MB. Free memory was 121.9 MB in the beginning and 120.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-29 09:04:14,611 INFO L168 Benchmark]: RCFGBuilder took 610.43 ms. Allocated memory is still 156.2 MB. Free memory was 120.3 MB in the beginning and 107.8 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-29 09:04:14,612 INFO L168 Benchmark]: TraceAbstraction took 804.95 ms. Allocated memory is still 156.2 MB. Free memory was 107.3 MB in the beginning and 119.9 MB in the end (delta: -12.6 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-29 09:04:14,615 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 125.8 MB. Free memory is still 84.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 321.35 ms. Allocated memory is still 156.2 MB. Free memory was 131.6 MB in the beginning and 121.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 62.55 ms. Allocated memory is still 156.2 MB. Free memory was 121.9 MB in the beginning and 120.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 610.43 ms. Allocated memory is still 156.2 MB. Free memory was 120.3 MB in the beginning and 107.8 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 804.95 ms. Allocated memory is still 156.2 MB. Free memory was 107.3 MB in the beginning and 119.9 MB in the end (delta: -12.6 MB). There was no memory consumed. 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 24, overapproximation of someBinaryArithmeticFLOAToperation at line 23. Possible FailurePath: [L17] int x; [L18] float y, z; [L20] x = __VERIFIER_nondet_int() [L21] CALL assume_abort_if_not(x >= -10 && x <= 10) [L11] COND FALSE !(!cond) [L21] RET assume_abort_if_not(x >= -10 && x <= 10) [L23] y = x*x - 2.f [L24] CALL __VERIFIER_assert(y != 0.f) [L13] COND TRUE !(cond) [L13] CALL reach_error() [L3] __assert_fail("0", "inv_square_int.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 21 SDtfs, 12 SDslu, 3 SDs, 0 SdLazy, 5 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 34 NumberOfCodeBlocks, 34 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 736 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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...