/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 enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/trex02-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 23:39:12,336 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 23:39:12,339 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 23:39:12,383 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 23:39:12,383 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 23:39:12,396 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 23:39:12,397 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 23:39:12,400 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 23:39:12,404 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 23:39:12,407 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 23:39:12,408 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 23:39:12,411 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 23:39:12,411 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 23:39:12,414 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 23:39:12,416 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 23:39:12,417 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 23:39:12,419 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 23:39:12,420 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 23:39:12,422 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 23:39:12,429 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 23:39:12,432 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 23:39:12,433 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 23:39:12,434 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 23:39:12,435 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 23:39:12,440 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 23:39:12,440 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 23:39:12,440 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 23:39:12,443 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 23:39:12,443 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 23:39:12,445 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 23:39:12,445 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 23:39:12,446 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 23:39:12,447 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 23:39:12,448 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 23:39:12,449 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 23:39:12,449 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 23:39:12,450 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 23:39:12,450 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 23:39:12,450 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 23:39:12,451 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 23:39:12,453 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 23:39:12,454 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 [2020-08-18 23:39:12,496 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 23:39:12,496 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 23:39:12,499 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 23:39:12,499 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 23:39:12,499 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 23:39:12,499 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 23:39:12,500 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 23:39:12,500 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 23:39:12,500 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 23:39:12,500 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 23:39:12,501 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 23:39:12,502 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 23:39:12,502 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 23:39:12,502 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 23:39:12,503 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 23:39:12,503 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 23:39:12,503 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 23:39:12,503 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 23:39:12,503 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 23:39:12,504 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 23:39:12,504 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 23:39:12,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 23:39:12,504 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 23:39:12,504 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 23:39:12,505 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 23:39:12,505 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 23:39:12,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 23:39:12,505 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 23:39:12,505 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 23:39:12,505 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 -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; [2020-08-18 23:39:12,795 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 23:39:12,808 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 23:39:12,811 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 23:39:12,813 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 23:39:12,813 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 23:39:12,814 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex02-2.c [2020-08-18 23:39:12,891 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/451721402/5661f0ce16b647d6a8eb94d78aa5410e/FLAG9607080ba [2020-08-18 23:39:13,394 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 23:39:13,395 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/trex02-2.c [2020-08-18 23:39:13,401 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/451721402/5661f0ce16b647d6a8eb94d78aa5410e/FLAG9607080ba [2020-08-18 23:39:13,747 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/451721402/5661f0ce16b647d6a8eb94d78aa5410e [2020-08-18 23:39:13,757 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 23:39:13,759 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 23:39:13,760 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 23:39:13,760 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 23:39:13,764 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 23:39:13,765 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:39:13" (1/1) ... [2020-08-18 23:39:13,768 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b6d277a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:39:13, skipping insertion in model container [2020-08-18 23:39:13,768 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:39:13" (1/1) ... [2020-08-18 23:39:13,776 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 23:39:13,793 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 23:39:14,004 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 23:39:14,008 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 23:39:14,019 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 23:39:14,031 INFO L208 MainTranslator]: Completed translation [2020-08-18 23:39:14,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:39:14 WrapperNode [2020-08-18 23:39:14,032 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 23:39:14,033 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 23:39:14,033 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 23:39:14,033 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 23:39:14,045 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:39:14" (1/1) ... [2020-08-18 23:39:14,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:39:14" (1/1) ... [2020-08-18 23:39:14,050 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:39:14" (1/1) ... [2020-08-18 23:39:14,050 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:39:14" (1/1) ... [2020-08-18 23:39:14,054 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:39:14" (1/1) ... [2020-08-18 23:39:14,058 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:39:14" (1/1) ... [2020-08-18 23:39:14,059 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:39:14" (1/1) ... [2020-08-18 23:39:14,135 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 23:39:14,136 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 23:39:14,136 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 23:39:14,136 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 23:39:14,137 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:39:14" (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 [2020-08-18 23:39:14,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 23:39:14,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 23:39:14,203 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 23:39:14,203 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2020-08-18 23:39:14,203 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 23:39:14,203 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 23:39:14,203 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 23:39:14,203 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-18 23:39:14,204 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 23:39:14,204 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2020-08-18 23:39:14,204 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 23:39:14,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 23:39:14,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 23:39:14,378 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 23:39:14,379 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 23:39:14,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:39:14 BoogieIcfgContainer [2020-08-18 23:39:14,383 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 23:39:14,384 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 23:39:14,385 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 23:39:14,388 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 23:39:14,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:39:13" (1/3) ... [2020-08-18 23:39:14,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f4353c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:39:14, skipping insertion in model container [2020-08-18 23:39:14,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:39:14" (2/3) ... [2020-08-18 23:39:14,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f4353c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:39:14, skipping insertion in model container [2020-08-18 23:39:14,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:39:14" (3/3) ... [2020-08-18 23:39:14,392 INFO L109 eAbstractionObserver]: Analyzing ICFG trex02-2.c [2020-08-18 23:39:14,403 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 23:39:14,410 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 23:39:14,425 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 23:39:14,449 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 23:39:14,449 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 23:39:14,449 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 23:39:14,450 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 23:39:14,450 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 23:39:14,450 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 23:39:14,450 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 23:39:14,450 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 23:39:14,466 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-08-18 23:39:14,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-18 23:39:14,472 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:39:14,473 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:39:14,473 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:39:14,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:39:14,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1873481772, now seen corresponding path program 1 times [2020-08-18 23:39:14,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:39:14,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099490609] [2020-08-18 23:39:14,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:39:14,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:39:14,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:39:14,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:39:14,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:39:14,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099490609] [2020-08-18 23:39:14,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:39:14,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:39:14,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238262710] [2020-08-18 23:39:14,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:39:14,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:39:14,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:39:14,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:39:14,674 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-08-18 23:39:14,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:39:14,744 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-08-18 23:39:14,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:39:14,746 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-08-18 23:39:14,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:39:14,757 INFO L225 Difference]: With dead ends: 35 [2020-08-18 23:39:14,758 INFO L226 Difference]: Without dead ends: 18 [2020-08-18 23:39:14,762 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 [2020-08-18 23:39:14,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-18 23:39:14,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-18 23:39:14,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-18 23:39:14,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-08-18 23:39:14,844 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 11 [2020-08-18 23:39:14,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:39:14,845 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-08-18 23:39:14,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:39:14,855 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-08-18 23:39:14,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-18 23:39:14,857 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:39:14,857 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:39:14,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 23:39:14,858 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:39:14,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:39:14,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1862399520, now seen corresponding path program 1 times [2020-08-18 23:39:14,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:39:14,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27108561] [2020-08-18 23:39:14,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:39:14,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 23:39:14,901 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 23:39:14,902 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 23:39:14,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 23:39:14,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 11:39:14 BoogieIcfgContainer [2020-08-18 23:39:14,924 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 23:39:14,927 INFO L168 Benchmark]: Toolchain (without parser) took 1167.48 ms. Allocated memory was 141.6 MB in the beginning and 203.9 MB in the end (delta: 62.4 MB). Free memory was 104.6 MB in the beginning and 146.6 MB in the end (delta: -41.9 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. [2020-08-18 23:39:14,928 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 23:39:14,929 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.76 ms. Allocated memory is still 141.6 MB. Free memory was 104.4 MB in the beginning and 95.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-18 23:39:14,930 INFO L168 Benchmark]: Boogie Preprocessor took 102.49 ms. Allocated memory was 141.6 MB in the beginning and 203.9 MB in the end (delta: 62.4 MB). Free memory was 95.1 MB in the beginning and 184.0 MB in the end (delta: -88.8 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-08-18 23:39:14,931 INFO L168 Benchmark]: RCFGBuilder took 247.31 ms. Allocated memory is still 203.9 MB. Free memory was 184.0 MB in the beginning and 171.1 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-18 23:39:14,932 INFO L168 Benchmark]: TraceAbstraction took 539.95 ms. Allocated memory is still 203.9 MB. Free memory was 170.4 MB in the beginning and 146.6 MB in the end (delta: 23.8 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. [2020-08-18 23:39:14,936 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 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 272.76 ms. Allocated memory is still 141.6 MB. Free memory was 104.4 MB in the beginning and 95.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 102.49 ms. Allocated memory was 141.6 MB in the beginning and 203.9 MB in the end (delta: 62.4 MB). Free memory was 95.1 MB in the beginning and 184.0 MB in the end (delta: -88.8 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 247.31 ms. Allocated memory is still 203.9 MB. Free memory was 184.0 MB in the beginning and 171.1 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 539.95 ms. Allocated memory is still 203.9 MB. Free memory was 170.4 MB in the beginning and 146.6 MB in the end (delta: 23.8 MB). Peak memory consumption was 23.8 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: [L13] int x; [L20] x=__VERIFIER_nondet_int() [L21] COND FALSE !(x > 0) [L26] CALL __VERIFIER_assert(x==0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 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: 25 SDtfs, 5 SDslu, 10 SDs, 0 SdLazy, 7 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=24occurred 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, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 120 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...