/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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/nla-digbench/mannadiv.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 18:10:25,091 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 18:10:25,094 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 18:10:25,111 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 18:10:25,111 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 18:10:25,113 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 18:10:25,115 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 18:10:25,117 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 18:10:25,120 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 18:10:25,121 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 18:10:25,123 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 18:10:25,124 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 18:10:25,124 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 18:10:25,126 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 18:10:25,127 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 18:10:25,129 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 18:10:25,131 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 18:10:25,132 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 18:10:25,134 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 18:10:25,137 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 18:10:25,139 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 18:10:25,140 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 18:10:25,142 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 18:10:25,143 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 18:10:25,146 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 18:10:25,154 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 18:10:25,155 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 18:10:25,158 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 18:10:25,159 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 18:10:25,161 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 18:10:25,161 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 18:10:25,166 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 18:10:25,167 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 18:10:25,169 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 18:10:25,171 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 18:10:25,172 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 18:10:25,175 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 18:10:25,197 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 18:10:25,198 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 18:10:25,201 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 18:10:25,201 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 18:10:25,202 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 18:10:25,202 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 18:10:25,202 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 18:10:25,202 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 18:10:25,202 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 18:10:25,203 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 18:10:25,204 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 18:10:25,205 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 18:10:25,205 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 18:10:25,205 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 18:10:25,206 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 18:10:25,206 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 18:10:25,207 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 18:10:25,207 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 18:10:25,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 18:10:25,207 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 18:10:25,207 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 18:10:25,208 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 18:10:25,208 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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: Use separate solver for trace checks -> true [2020-07-17 18:10:25,640 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 18:10:25,657 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 18:10:25,662 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 18:10:25,664 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 18:10:25,665 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 18:10:25,666 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/mannadiv.c [2020-07-17 18:10:25,790 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/704d94e02/739821343bf94c4d80ce8afd9f840cba/FLAGd149b34f1 [2020-07-17 18:10:26,429 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 18:10:26,430 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/mannadiv.c [2020-07-17 18:10:26,440 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/704d94e02/739821343bf94c4d80ce8afd9f840cba/FLAGd149b34f1 [2020-07-17 18:10:26,745 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/704d94e02/739821343bf94c4d80ce8afd9f840cba [2020-07-17 18:10:26,759 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 18:10:26,764 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 18:10:26,765 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 18:10:26,765 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 18:10:26,770 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 18:10:26,772 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 06:10:26" (1/1) ... [2020-07-17 18:10:26,776 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4eee7641 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:10:26, skipping insertion in model container [2020-07-17 18:10:26,776 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 06:10:26" (1/1) ... [2020-07-17 18:10:26,788 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 18:10:26,814 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 18:10:27,022 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 18:10:27,027 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 18:10:27,045 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 18:10:27,061 INFO L208 MainTranslator]: Completed translation [2020-07-17 18:10:27,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:10:27 WrapperNode [2020-07-17 18:10:27,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 18:10:27,063 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 18:10:27,063 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 18:10:27,063 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 18:10:27,078 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:10:27" (1/1) ... [2020-07-17 18:10:27,079 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:10:27" (1/1) ... [2020-07-17 18:10:27,086 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:10:27" (1/1) ... [2020-07-17 18:10:27,086 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:10:27" (1/1) ... [2020-07-17 18:10:27,092 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:10:27" (1/1) ... [2020-07-17 18:10:27,098 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:10:27" (1/1) ... [2020-07-17 18:10:27,100 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:10:27" (1/1) ... [2020-07-17 18:10:27,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 18:10:27,206 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 18:10:27,206 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 18:10:27,206 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 18:10:27,213 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:10:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-07-17 18:10:27,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 18:10:27,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 18:10:27,341 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-17 18:10:27,341 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 18:10:27,341 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 18:10:27,341 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 18:10:27,341 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 18:10:27,342 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-17 18:10:27,342 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-17 18:10:27,342 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 18:10:27,343 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 18:10:27,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 18:10:27,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 18:10:27,715 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 18:10:27,716 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-17 18:10:27,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 06:10:27 BoogieIcfgContainer [2020-07-17 18:10:27,723 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 18:10:27,724 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 18:10:27,724 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 18:10:27,729 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 18:10:27,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 06:10:26" (1/3) ... [2020-07-17 18:10:27,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ec030d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 06:10:27, skipping insertion in model container [2020-07-17 18:10:27,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:10:27" (2/3) ... [2020-07-17 18:10:27,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ec030d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 06:10:27, skipping insertion in model container [2020-07-17 18:10:27,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 06:10:27" (3/3) ... [2020-07-17 18:10:27,735 INFO L109 eAbstractionObserver]: Analyzing ICFG mannadiv.c [2020-07-17 18:10:27,749 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 18:10:27,760 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 18:10:27,782 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 18:10:27,825 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 18:10:27,826 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 18:10:27,826 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-17 18:10:27,826 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 18:10:27,826 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 18:10:27,827 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 18:10:27,828 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 18:10:27,828 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 18:10:27,857 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2020-07-17 18:10:27,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-17 18:10:27,877 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:10:27,880 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:10:27,881 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:10:27,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:10:27,893 INFO L82 PathProgramCache]: Analyzing trace with hash 754575313, now seen corresponding path program 1 times [2020-07-17 18:10:27,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:10:27,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090455595] [2020-07-17 18:10:27,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:10:28,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:28,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:28,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:28,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:28,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-17 18:10:28,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090455595] [2020-07-17 18:10:28,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:10:28,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-17 18:10:28,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664078001] [2020-07-17 18:10:28,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-17 18:10:28,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:10:28,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-17 18:10:28,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-17 18:10:28,193 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 2 states. [2020-07-17 18:10:28,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:10:28,232 INFO L93 Difference]: Finished difference Result 76 states and 93 transitions. [2020-07-17 18:10:28,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-17 18:10:28,234 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 33 [2020-07-17 18:10:28,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:10:28,247 INFO L225 Difference]: With dead ends: 76 [2020-07-17 18:10:28,247 INFO L226 Difference]: Without dead ends: 40 [2020-07-17 18:10:28,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-17 18:10:28,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-17 18:10:28,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-07-17 18:10:28,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-17 18:10:28,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-07-17 18:10:28,316 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 33 [2020-07-17 18:10:28,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:10:28,319 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-07-17 18:10:28,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-17 18:10:28,320 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-07-17 18:10:28,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-17 18:10:28,323 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:10:28,323 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:10:28,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 18:10:28,324 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:10:28,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:10:28,325 INFO L82 PathProgramCache]: Analyzing trace with hash 756362773, now seen corresponding path program 1 times [2020-07-17 18:10:28,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:10:28,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847627398] [2020-07-17 18:10:28,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:10:28,351 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-17 18:10:28,352 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-07-17 18:10:28,352 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 18:10:28,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 18:10:28,380 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-07-17 18:10:28,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 06:10:28 BoogieIcfgContainer [2020-07-17 18:10:28,381 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 18:10:28,385 INFO L168 Benchmark]: Toolchain (without parser) took 1621.99 ms. Allocated memory was 140.5 MB in the beginning and 202.4 MB in the end (delta: 61.9 MB). Free memory was 104.7 MB in the beginning and 142.7 MB in the end (delta: -38.0 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. [2020-07-17 18:10:28,387 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 140.5 MB. Free memory was 123.3 MB in the beginning and 123.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-17 18:10:28,388 INFO L168 Benchmark]: CACSL2BoogieTranslator took 297.46 ms. Allocated memory is still 140.5 MB. Free memory was 104.2 MB in the beginning and 94.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-17 18:10:28,390 INFO L168 Benchmark]: Boogie Preprocessor took 142.73 ms. Allocated memory was 140.5 MB in the beginning and 202.4 MB in the end (delta: 61.9 MB). Free memory was 94.6 MB in the beginning and 182.5 MB in the end (delta: -87.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 7.1 GB. [2020-07-17 18:10:28,391 INFO L168 Benchmark]: RCFGBuilder took 516.67 ms. Allocated memory is still 202.4 MB. Free memory was 182.5 MB in the beginning and 167.2 MB in the end (delta: 15.3 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. [2020-07-17 18:10:28,392 INFO L168 Benchmark]: TraceAbstraction took 657.32 ms. Allocated memory is still 202.4 MB. Free memory was 166.6 MB in the beginning and 142.7 MB in the end (delta: 23.9 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. [2020-07-17 18:10:28,398 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 140.5 MB. Free memory was 123.3 MB in the beginning and 123.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 297.46 ms. Allocated memory is still 140.5 MB. Free memory was 104.2 MB in the beginning and 94.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 142.73 ms. Allocated memory was 140.5 MB in the beginning and 202.4 MB in the end (delta: 61.9 MB). Free memory was 94.6 MB in the beginning and 182.5 MB in the end (delta: -87.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 516.67 ms. Allocated memory is still 202.4 MB. Free memory was 182.5 MB in the beginning and 167.2 MB in the end (delta: 15.3 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 657.32 ms. Allocated memory is still 202.4 MB. Free memory was 166.6 MB in the beginning and 142.7 MB in the end (delta: 23.9 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 16]: 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: [L21] int x1, x2; [L22] int y1, y2, y3; [L23] x1 = __VERIFIER_nondet_int() [L24] x2 = __VERIFIER_nondet_int() [L26] CALL assume_abort_if_not(x1 >= 0) [L11] COND FALSE !(!cond) [L26] RET assume_abort_if_not(x1 >= 0) [L27] CALL assume_abort_if_not(x2 != 0) [L11] COND FALSE !(!cond) [L27] RET assume_abort_if_not(x2 != 0) [L29] y1 = 0 [L30] y2 = 0 [L31] y3 = x1 [L33] COND TRUE 1 [L34] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L14] COND TRUE !(cond) [L16] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 46 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 49 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred 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, 0.0s InterpolantComputationTime, 33 NumberOfCodeBlocks, 33 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 1024 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 4/4 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...