/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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 SingleStatement --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=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/ps2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 02:21:24,700 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 02:21:24,704 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 02:21:24,731 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 02:21:24,731 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 02:21:24,733 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 02:21:24,734 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 02:21:24,736 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 02:21:24,738 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 02:21:24,739 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 02:21:24,740 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 02:21:24,742 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 02:21:24,742 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 02:21:24,743 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 02:21:24,747 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 02:21:24,749 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 02:21:24,753 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 02:21:24,754 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 02:21:24,758 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 02:21:24,764 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 02:21:24,766 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 02:21:24,767 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 02:21:24,769 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 02:21:24,770 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 02:21:24,772 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 02:21:24,772 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 02:21:24,773 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 02:21:24,774 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 02:21:24,774 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 02:21:24,775 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 02:21:24,776 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 02:21:24,777 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 02:21:24,778 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 02:21:24,779 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 02:21:24,780 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 02:21:24,780 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 02:21:24,781 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 02:21:24,781 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 02:21:24,781 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 02:21:24,782 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 02:21:24,783 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 02:21:24,784 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 [2020-09-25 02:21:24,811 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 02:21:24,811 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 02:21:24,813 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 02:21:24,813 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 02:21:24,813 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 02:21:24,813 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 02:21:24,814 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 02:21:24,814 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 02:21:24,814 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 02:21:24,814 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 02:21:24,815 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 02:21:24,815 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 02:21:24,815 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 02:21:24,815 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 02:21:24,815 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 02:21:24,816 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 02:21:24,816 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 02:21:24,816 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 02:21:24,816 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 02:21:24,816 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 02:21:24,817 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 02:21:24,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 02:21:24,817 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 02:21:24,817 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 02:21:24,818 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 02:21:24,818 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 02:21:24,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 02:21:24,818 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 02:21:24,819 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 02:21:24,819 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> SingleStatement 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=NARROWEST;log-additional-information=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=NARROWEST;log-additional-information=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=NARROWEST;log-additional-information=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=NARROWEST;log-additional-information=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=NARROWEST;log-additional-information=true; [2020-09-25 02:21:25,307 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 02:21:25,325 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 02:21:25,329 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 02:21:25,331 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 02:21:25,332 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 02:21:25,333 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps2.c [2020-09-25 02:21:25,426 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f746f6733/38521dc18b9440609d13ff47bbea54c7/FLAGdce8e0d0b [2020-09-25 02:21:26,025 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 02:21:26,026 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/nla-digbench/ps2.c [2020-09-25 02:21:26,035 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f746f6733/38521dc18b9440609d13ff47bbea54c7/FLAGdce8e0d0b [2020-09-25 02:21:26,339 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f746f6733/38521dc18b9440609d13ff47bbea54c7 [2020-09-25 02:21:26,353 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 02:21:26,360 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 02:21:26,361 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 02:21:26,361 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 02:21:26,366 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 02:21:26,367 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:21:26" (1/1) ... [2020-09-25 02:21:26,372 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e588cd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:21:26, skipping insertion in model container [2020-09-25 02:21:26,372 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:21:26" (1/1) ... [2020-09-25 02:21:26,382 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 02:21:26,409 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 02:21:26,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:21:26,639 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 02:21:26,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:21:26,688 INFO L208 MainTranslator]: Completed translation [2020-09-25 02:21:26,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:21:26 WrapperNode [2020-09-25 02:21:26,688 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 02:21:26,689 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 02:21:26,689 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 02:21:26,689 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 02:21:26,703 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:21:26" (1/1) ... [2020-09-25 02:21:26,703 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:21:26" (1/1) ... [2020-09-25 02:21:26,710 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:21:26" (1/1) ... [2020-09-25 02:21:26,710 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:21:26" (1/1) ... [2020-09-25 02:21:26,715 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:21:26" (1/1) ... [2020-09-25 02:21:26,721 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:21:26" (1/1) ... [2020-09-25 02:21:26,722 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:21:26" (1/1) ... [2020-09-25 02:21:26,800 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 02:21:26,800 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 02:21:26,801 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 02:21:26,801 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 02:21:26,802 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:21:26" (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 [2020-09-25 02:21:26,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 02:21:26,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 02:21:26,881 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 02:21:26,881 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 02:21:26,881 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 02:21:26,881 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 02:21:26,881 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 02:21:26,882 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 02:21:26,882 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 02:21:26,882 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 02:21:26,882 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 02:21:26,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 02:21:26,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 02:21:27,107 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 02:21:27,107 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 02:21:27,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:21:27 BoogieIcfgContainer [2020-09-25 02:21:27,113 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 02:21:27,114 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 02:21:27,114 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 02:21:27,118 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 02:21:27,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:21:26" (1/3) ... [2020-09-25 02:21:27,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68bb4ab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:21:27, skipping insertion in model container [2020-09-25 02:21:27,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:21:26" (2/3) ... [2020-09-25 02:21:27,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68bb4ab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:21:27, skipping insertion in model container [2020-09-25 02:21:27,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:21:27" (3/3) ... [2020-09-25 02:21:27,123 INFO L109 eAbstractionObserver]: Analyzing ICFG ps2.c [2020-09-25 02:21:27,135 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 02:21:27,145 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 02:21:27,168 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 02:21:27,198 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 02:21:27,199 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 02:21:27,199 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 02:21:27,199 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 02:21:27,199 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 02:21:27,199 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 02:21:27,199 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 02:21:27,199 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 02:21:27,220 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-09-25 02:21:27,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-25 02:21:27,227 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:21:27,228 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:21:27,229 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:21:27,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:21:27,236 INFO L82 PathProgramCache]: Analyzing trace with hash 41942830, now seen corresponding path program 1 times [2020-09-25 02:21:27,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:21:27,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863741006] [2020-09-25 02:21:27,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:21:27,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:21:27,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:21:27,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863741006] [2020-09-25 02:21:27,398 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2020-09-25 02:21:27,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:21:27,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-09-25 02:21:27,399 ERROR L206 FreeRefinementEngine]: Strategy FIXED_PREFERENCES failed to provide any proof altough trace is infeasible [2020-09-25 02:21:27,400 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 02:21:27,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 02:21:27,421 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-09-25 02:21:27,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 02:21:27 BoogieIcfgContainer [2020-09-25 02:21:27,421 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 02:21:27,424 INFO L168 Benchmark]: Toolchain (without parser) took 1068.23 ms. Allocated memory was 114.8 MB in the beginning and 158.3 MB in the end (delta: 43.5 MB). Free memory was 73.0 MB in the beginning and 118.8 MB in the end (delta: -45.8 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 02:21:27,425 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 114.8 MB. Free memory was 90.3 MB in the beginning and 90.2 MB in the end (delta: 105.1 kB). Peak memory consumption was 105.1 kB. Max. memory is 7.1 GB. [2020-09-25 02:21:27,427 INFO L168 Benchmark]: CACSL2BoogieTranslator took 327.59 ms. Allocated memory was 114.8 MB in the beginning and 130.0 MB in the end (delta: 15.2 MB). Free memory was 72.5 MB in the beginning and 100.2 MB in the end (delta: -27.8 MB). Peak memory consumption was 17.4 MB. Max. memory is 7.1 GB. [2020-09-25 02:21:27,428 INFO L168 Benchmark]: Boogie Preprocessor took 110.87 ms. Allocated memory was 130.0 MB in the beginning and 158.3 MB in the end (delta: 28.3 MB). Free memory was 100.2 MB in the beginning and 144.8 MB in the end (delta: -44.6 MB). Peak memory consumption was 1.5 MB. Max. memory is 7.1 GB. [2020-09-25 02:21:27,429 INFO L168 Benchmark]: RCFGBuilder took 312.61 ms. Allocated memory is still 158.3 MB. Free memory was 144.8 MB in the beginning and 132.2 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-09-25 02:21:27,430 INFO L168 Benchmark]: TraceAbstraction took 307.14 ms. Allocated memory is still 158.3 MB. Free memory was 131.3 MB in the beginning and 118.8 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-09-25 02:21:27,435 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 114.8 MB. Free memory was 90.3 MB in the beginning and 90.2 MB in the end (delta: 105.1 kB). Peak memory consumption was 105.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 327.59 ms. Allocated memory was 114.8 MB in the beginning and 130.0 MB in the end (delta: 15.2 MB). Free memory was 72.5 MB in the beginning and 100.2 MB in the end (delta: -27.8 MB). Peak memory consumption was 17.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 110.87 ms. Allocated memory was 130.0 MB in the beginning and 158.3 MB in the end (delta: 28.3 MB). Free memory was 100.2 MB in the beginning and 144.8 MB in the end (delta: -44.6 MB). Peak memory consumption was 1.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 312.61 ms. Allocated memory is still 158.3 MB. Free memory was 144.8 MB in the beginning and 132.2 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 307.14 ms. Allocated memory is still 158.3 MB. Free memory was 131.3 MB in the beginning and 118.8 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 10]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L16] int k, y, x, c; [L17] k = __VERIFIER_nondet_int() [L19] y = 0 [L20] x = 0 [L21] c = 0 [L33] CALL __VERIFIER_assert((y*y) - 2*x + y == 0) [L8] COND TRUE !(cond) [L10] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred 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: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 19 NumberOfCodeBlocks, 19 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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...