/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/while_infinite_loop_4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:29:08,459 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:29:08,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:29:08,508 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:29:08,508 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:29:08,519 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:29:08,521 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:29:08,526 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:29:08,530 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:29:08,531 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:29:08,534 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:29:08,536 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:29:08,536 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:29:08,541 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:29:08,544 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:29:08,546 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:29:08,548 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:29:08,550 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:29:08,553 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:29:08,561 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:29:08,563 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:29:08,564 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:29:08,566 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:29:08,567 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:29:08,571 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 10:29:08,572 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 10:29:08,572 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 10:29:08,575 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 10:29:08,575 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 10:29:08,577 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 10:29:08,578 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 10:29:08,579 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 10:29:08,580 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 10:29:08,581 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 10:29:08,583 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 10:29:08,583 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 10:29:08,584 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 10:29:08,584 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 10:29:08,584 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:29:08,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:29:08,587 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:29:08,588 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 [2020-09-21 10:29:08,638 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:29:08,638 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:29:08,641 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:29:08,641 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:29:08,641 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:29:08,642 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:29:08,642 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:29:08,642 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:29:08,642 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:29:08,643 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:29:08,644 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:29:08,644 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:29:08,644 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:29:08,645 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:29:08,645 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:29:08,645 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:29:08,645 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:29:08,646 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:29:08,646 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:29:08,646 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:29:08,646 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:29:08,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:29:08,647 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:29:08,647 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:29:08,647 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:29:08,647 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:29:08,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:29:08,648 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:29:08,648 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:29:08,648 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 -> false [2020-09-21 10:29:09,142 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:29:09,172 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:29:09,177 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:29:09,179 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:29:09,180 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:29:09,181 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/while_infinite_loop_4.c [2020-09-21 10:29:09,282 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b97bed9b2/bf0bf545cc9c496e84613a73c6bdbf3f/FLAGb060fe0b9 [2020-09-21 10:29:09,839 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:29:09,840 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/while_infinite_loop_4.c [2020-09-21 10:29:09,849 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b97bed9b2/bf0bf545cc9c496e84613a73c6bdbf3f/FLAGb060fe0b9 [2020-09-21 10:29:10,195 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b97bed9b2/bf0bf545cc9c496e84613a73c6bdbf3f [2020-09-21 10:29:10,212 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:29:10,221 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:29:10,222 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:29:10,222 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:29:10,227 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:29:10,228 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:29:10" (1/1) ... [2020-09-21 10:29:10,233 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@280c5647 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:10, skipping insertion in model container [2020-09-21 10:29:10,233 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:29:10" (1/1) ... [2020-09-21 10:29:10,243 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:29:10,270 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:29:10,488 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:29:10,497 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:29:10,517 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:29:10,539 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:29:10,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:10 WrapperNode [2020-09-21 10:29:10,540 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:29:10,541 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:29:10,541 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:29:10,541 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:29:10,558 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:10" (1/1) ... [2020-09-21 10:29:10,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:10" (1/1) ... [2020-09-21 10:29:10,564 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:10" (1/1) ... [2020-09-21 10:29:10,564 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:10" (1/1) ... [2020-09-21 10:29:10,648 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:10" (1/1) ... [2020-09-21 10:29:10,655 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:10" (1/1) ... [2020-09-21 10:29:10,656 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:10" (1/1) ... [2020-09-21 10:29:10,658 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:29:10,658 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:29:10,658 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:29:10,659 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:29:10,660 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:10" (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 [2020-09-21 10:29:10,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:29:10,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:29:10,738 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 10:29:10,738 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-09-21 10:29:10,739 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:29:10,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:29:10,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 10:29:10,739 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-09-21 10:29:10,739 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:29:10,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:29:10,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:29:10,914 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:29:10,915 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-21 10:29:10,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:29:10 BoogieIcfgContainer [2020-09-21 10:29:10,919 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:29:10,921 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:29:10,921 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:29:10,925 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:29:10,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:29:10" (1/3) ... [2020-09-21 10:29:10,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@411f7324 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:29:10, skipping insertion in model container [2020-09-21 10:29:10,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:10" (2/3) ... [2020-09-21 10:29:10,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@411f7324 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:29:10, skipping insertion in model container [2020-09-21 10:29:10,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:29:10" (3/3) ... [2020-09-21 10:29:10,930 INFO L109 eAbstractionObserver]: Analyzing ICFG while_infinite_loop_4.c [2020-09-21 10:29:10,942 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:29:10,969 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:29:11,004 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:29:11,050 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:29:11,050 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:29:11,051 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:29:11,051 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:29:11,051 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:29:11,051 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:29:11,051 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:29:11,052 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:29:11,076 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-09-21 10:29:11,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-21 10:29:11,084 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:11,085 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:11,085 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:11,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:11,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1783967560, now seen corresponding path program 1 times [2020-09-21 10:29:11,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:11,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643608534] [2020-09-21 10:29:11,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:11,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:11,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:11,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:11,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:29:11,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643608534] [2020-09-21 10:29:11,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:29:11,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:29:11,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315902403] [2020-09-21 10:29:11,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:29:11,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:11,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:29:11,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:29:11,293 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2020-09-21 10:29:11,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:11,354 INFO L93 Difference]: Finished difference Result 37 states and 53 transitions. [2020-09-21 10:29:11,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:29:11,357 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-09-21 10:29:11,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:11,370 INFO L225 Difference]: With dead ends: 37 [2020-09-21 10:29:11,370 INFO L226 Difference]: Without dead ends: 19 [2020-09-21 10:29:11,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:29:11,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-09-21 10:29:11,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-09-21 10:29:11,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-09-21 10:29:11,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-09-21 10:29:11,424 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 10 [2020-09-21 10:29:11,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:11,425 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-09-21 10:29:11,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:29:11,425 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-09-21 10:29:11,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-21 10:29:11,426 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:11,426 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:11,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:29:11,427 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:11,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:11,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1698359207, now seen corresponding path program 1 times [2020-09-21 10:29:11,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:11,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534986168] [2020-09-21 10:29:11,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:11,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 10:29:11,455 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 10:29:11,456 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 10:29:11,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:29:11,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 10:29:11 BoogieIcfgContainer [2020-09-21 10:29:11,480 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 10:29:11,484 INFO L168 Benchmark]: Toolchain (without parser) took 1268.19 ms. Allocated memory was 140.5 MB in the beginning and 202.4 MB in the end (delta: 61.9 MB). Free memory was 103.5 MB in the beginning and 145.3 MB in the end (delta: -41.8 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. [2020-09-21 10:29:11,485 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 10:29:11,486 INFO L168 Benchmark]: CACSL2BoogieTranslator took 318.27 ms. Allocated memory is still 140.5 MB. Free memory was 102.9 MB in the beginning and 93.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-21 10:29:11,487 INFO L168 Benchmark]: Boogie Preprocessor took 117.28 ms. Allocated memory was 140.5 MB in the beginning and 202.4 MB in the end (delta: 61.9 MB). Free memory was 93.6 MB in the beginning and 181.5 MB in the end (delta: -88.0 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-09-21 10:29:11,488 INFO L168 Benchmark]: RCFGBuilder took 261.50 ms. Allocated memory is still 202.4 MB. Free memory was 181.5 MB in the beginning and 170.4 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. [2020-09-21 10:29:11,489 INFO L168 Benchmark]: TraceAbstraction took 559.23 ms. Allocated memory is still 202.4 MB. Free memory was 169.7 MB in the beginning and 145.3 MB in the end (delta: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 7.1 GB. [2020-09-21 10:29:11,493 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 318.27 ms. Allocated memory is still 140.5 MB. Free memory was 102.9 MB in the beginning and 93.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.28 ms. Allocated memory was 140.5 MB in the beginning and 202.4 MB in the end (delta: 61.9 MB). Free memory was 93.6 MB in the beginning and 181.5 MB in the end (delta: -88.0 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 261.50 ms. Allocated memory is still 202.4 MB. Free memory was 181.5 MB in the beginning and 170.4 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 559.23 ms. Allocated memory is still 202.4 MB. Free memory was 169.7 MB in the beginning and 145.3 MB in the end (delta: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int x=0; [L24] COND TRUE 1 [L26] CALL eval() [L14] COND TRUE 1 [L15] x=1 [L26] RET eval() [L27] CALL __VERIFIER_assert(x==0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 18 SDtfs, 6 SDslu, 5 SDs, 0 SdLazy, 4 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred 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, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 99 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...