/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 --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options interpolation-heuristic=FIRST --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/mannadiv.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 15:04:38,258 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 15:04:38,260 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 15:04:38,283 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 15:04:38,283 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 15:04:38,284 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 15:04:38,285 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 15:04:38,287 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 15:04:38,288 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 15:04:38,289 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 15:04:38,290 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 15:04:38,291 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 15:04:38,291 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 15:04:38,292 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 15:04:38,293 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 15:04:38,294 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 15:04:38,295 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 15:04:38,296 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 15:04:38,297 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 15:04:38,299 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 15:04:38,301 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 15:04:38,301 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 15:04:38,303 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 15:04:38,303 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 15:04:38,306 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 15:04:38,313 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 15:04:38,313 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 15:04:38,314 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 15:04:38,315 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 [2020-08-21 15:04:38,352 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 15:04:38,352 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 15:04:38,353 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 15:04:38,357 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 15:04:38,357 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 15:04:38,357 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 15:04:38,357 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 15:04:38,358 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 15:04:38,358 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 15:04:38,358 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 15:04:38,358 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 15:04:38,358 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 15:04:38,358 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 15:04:38,361 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 15:04:38,361 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 15:04:38,361 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 15:04:38,361 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 15:04:38,362 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 15:04:38,362 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 15:04:38,362 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 15:04:38,362 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 15:04:38,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 15:04:38,363 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 15:04:38,363 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 15:04:38,363 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 15:04:38,363 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 15:04:38,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 15:04:38,363 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 15:04:38,364 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 15:04:38,366 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.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; [2020-08-21 15:04:38,677 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 15:04:38,698 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 15:04:38,707 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 15:04:38,710 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 15:04:38,710 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 15:04:38,712 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/mannadiv.c [2020-08-21 15:04:38,788 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f575abf8f/64cfcbbb84c949349d88f90035699101/FLAGef5a8c96b [2020-08-21 15:04:39,210 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 15:04:39,213 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/nla-digbench/mannadiv.c [2020-08-21 15:04:39,220 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f575abf8f/64cfcbbb84c949349d88f90035699101/FLAGef5a8c96b [2020-08-21 15:04:39,591 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f575abf8f/64cfcbbb84c949349d88f90035699101 [2020-08-21 15:04:39,599 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 15:04:39,600 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 15:04:39,601 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 15:04:39,601 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 15:04:39,605 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 15:04:39,606 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:04:39" (1/1) ... [2020-08-21 15:04:39,609 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79b03bc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:39, skipping insertion in model container [2020-08-21 15:04:39,609 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:04:39" (1/1) ... [2020-08-21 15:04:39,617 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 15:04:39,639 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 15:04:39,866 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:04:39,870 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 15:04:39,885 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:04:39,898 INFO L208 MainTranslator]: Completed translation [2020-08-21 15:04:39,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:39 WrapperNode [2020-08-21 15:04:39,898 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 15:04:39,899 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 15:04:39,899 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 15:04:39,899 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 15:04:39,908 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:39" (1/1) ... [2020-08-21 15:04:39,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:39" (1/1) ... [2020-08-21 15:04:39,913 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:39" (1/1) ... [2020-08-21 15:04:39,914 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:39" (1/1) ... [2020-08-21 15:04:39,917 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:39" (1/1) ... [2020-08-21 15:04:39,923 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:39" (1/1) ... [2020-08-21 15:04:39,924 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:39" (1/1) ... [2020-08-21 15:04:40,002 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 15:04:40,003 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 15:04:40,003 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 15:04:40,003 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 15:04:40,004 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:39" (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 [2020-08-21 15:04:40,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 15:04:40,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 15:04:40,075 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 15:04:40,075 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 15:04:40,075 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 15:04:40,076 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 15:04:40,076 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 15:04:40,076 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 15:04:40,076 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 15:04:40,076 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 15:04:40,076 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 15:04:40,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 15:04:40,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 15:04:40,271 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 15:04:40,271 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 15:04:40,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:04:40 BoogieIcfgContainer [2020-08-21 15:04:40,276 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 15:04:40,277 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 15:04:40,277 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 15:04:40,280 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 15:04:40,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 03:04:39" (1/3) ... [2020-08-21 15:04:40,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e1735c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:04:40, skipping insertion in model container [2020-08-21 15:04:40,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:39" (2/3) ... [2020-08-21 15:04:40,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e1735c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:04:40, skipping insertion in model container [2020-08-21 15:04:40,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:04:40" (3/3) ... [2020-08-21 15:04:40,284 INFO L109 eAbstractionObserver]: Analyzing ICFG mannadiv.c [2020-08-21 15:04:40,296 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 15:04:40,304 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 15:04:40,336 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 15:04:40,397 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 15:04:40,397 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 15:04:40,397 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 15:04:40,397 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 15:04:40,398 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 15:04:40,398 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 15:04:40,398 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 15:04:40,398 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 15:04:40,426 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-08-21 15:04:40,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 15:04:40,434 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:04:40,435 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:04:40,436 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:04:40,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:04:40,442 INFO L82 PathProgramCache]: Analyzing trace with hash -849943384, now seen corresponding path program 1 times [2020-08-21 15:04:40,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:04:40,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669135371] [2020-08-21 15:04:40,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:04:40,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:40,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:04:40,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:40,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 15:04:40,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:40,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:04:40,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:40,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-21 15:04:40,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669135371] [2020-08-21 15:04:40,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:04:40,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-21 15:04:40,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367440380] [2020-08-21 15:04:40,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-21 15:04:40,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:04:40,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-21 15:04:40,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-21 15:04:40,634 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2020-08-21 15:04:40,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:04:40,656 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2020-08-21 15:04:40,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-21 15:04:40,657 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2020-08-21 15:04:40,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:04:40,665 INFO L225 Difference]: With dead ends: 50 [2020-08-21 15:04:40,666 INFO L226 Difference]: Without dead ends: 23 [2020-08-21 15:04:40,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-21 15:04:40,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-21 15:04:40,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-08-21 15:04:40,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-21 15:04:40,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-08-21 15:04:40,706 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 21 [2020-08-21 15:04:40,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:04:40,706 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-08-21 15:04:40,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-21 15:04:40,707 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-08-21 15:04:40,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 15:04:40,709 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:04:40,709 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:04:40,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 15:04:40,709 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:04:40,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:04:40,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1193991140, now seen corresponding path program 1 times [2020-08-21 15:04:40,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:04:40,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467435869] [2020-08-21 15:04:40,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:04:40,728 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-21 15:04:40,729 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-08-21 15:04:40,729 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 15:04:40,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 15:04:40,748 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-08-21 15:04:40,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 03:04:40 BoogieIcfgContainer [2020-08-21 15:04:40,748 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 15:04:40,751 INFO L168 Benchmark]: Toolchain (without parser) took 1150.12 ms. Allocated memory was 138.9 MB in the beginning and 200.3 MB in the end (delta: 61.3 MB). Free memory was 102.4 MB in the beginning and 142.8 MB in the end (delta: -40.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 7.1 GB. [2020-08-21 15:04:40,752 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 15:04:40,753 INFO L168 Benchmark]: CACSL2BoogieTranslator took 297.42 ms. Allocated memory is still 138.9 MB. Free memory was 102.2 MB in the beginning and 92.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-21 15:04:40,754 INFO L168 Benchmark]: Boogie Preprocessor took 103.48 ms. Allocated memory was 138.9 MB in the beginning and 200.3 MB in the end (delta: 61.3 MB). Free memory was 92.6 MB in the beginning and 180.2 MB in the end (delta: -87.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-08-21 15:04:40,755 INFO L168 Benchmark]: RCFGBuilder took 273.18 ms. Allocated memory is still 200.3 MB. Free memory was 180.2 MB in the beginning and 165.7 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-08-21 15:04:40,756 INFO L168 Benchmark]: TraceAbstraction took 471.59 ms. Allocated memory is still 200.3 MB. Free memory was 165.7 MB in the beginning and 142.8 MB in the end (delta: 22.9 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. [2020-08-21 15:04:40,761 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 297.42 ms. Allocated memory is still 138.9 MB. Free memory was 102.2 MB in the beginning and 92.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 103.48 ms. Allocated memory was 138.9 MB in the beginning and 200.3 MB in the end (delta: 61.3 MB). Free memory was 92.6 MB in the beginning and 180.2 MB in the end (delta: -87.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 273.18 ms. Allocated memory is still 200.3 MB. Free memory was 180.2 MB in the beginning and 165.7 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 471.59 ms. Allocated memory is still 200.3 MB. Free memory was 165.7 MB in the beginning and 142.8 MB in the end (delta: 22.9 MB). Peak memory consumption was 22.9 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, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 31 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 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, 0.0s InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 400 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...