/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/trex04.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 17:27:51,006 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 17:27:51,009 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 17:27:51,034 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 17:27:51,034 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 17:27:51,035 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 17:27:51,036 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 17:27:51,038 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 17:27:51,040 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 17:27:51,041 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 17:27:51,042 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 17:27:51,043 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 17:27:51,043 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 17:27:51,044 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 17:27:51,045 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 17:27:51,047 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 17:27:51,047 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 17:27:51,048 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 17:27:51,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 17:27:51,053 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 17:27:51,054 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 17:27:51,056 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 17:27:51,057 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 17:27:51,058 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 17:27:51,061 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 17:27:51,061 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 17:27:51,061 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 17:27:51,062 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 17:27:51,063 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 17:27:51,064 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-21 17:27:51,069 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 17:27:51,070 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 17:27:51,071 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 17:27:51,072 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 17:27:51,102 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 17:27:51,102 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 17:27:51,103 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 17:27:51,103 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 17:27:51,104 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 17:27:51,105 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 17:27:51,105 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 17:27:51,105 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 17:27:51,105 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 17:27:51,105 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 17:27:51,106 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 17:27:51,106 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 17:27:51,106 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 17:27:51,106 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 17:27:51,106 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 17:27:51,106 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 17:27:51,107 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 17:27:51,108 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 17:27:51,108 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 17:27:51,108 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 17:27:51,108 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 17:27:51,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 17:27:51,109 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 17:27:51,109 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 17:27:51,109 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 17:27:51,109 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 17:27:51,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 17:27:51,110 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 17:27:51,111 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 17:27:51,111 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=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; [2020-08-21 17:27:51,428 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 17:27:51,440 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 17:27:51,444 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 17:27:51,445 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 17:27:51,446 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 17:27:51,446 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex04.c [2020-08-21 17:27:51,514 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd433d33d/fc3b7af7f1d74841bb6ce032606205db/FLAG25368af90 [2020-08-21 17:27:51,945 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 17:27:51,946 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/trex04.c [2020-08-21 17:27:51,952 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd433d33d/fc3b7af7f1d74841bb6ce032606205db/FLAG25368af90 [2020-08-21 17:27:52,370 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd433d33d/fc3b7af7f1d74841bb6ce032606205db [2020-08-21 17:27:52,380 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 17:27:52,381 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 17:27:52,383 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 17:27:52,383 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 17:27:52,387 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 17:27:52,388 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:27:52" (1/1) ... [2020-08-21 17:27:52,391 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71155234 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:27:52, skipping insertion in model container [2020-08-21 17:27:52,392 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:27:52" (1/1) ... [2020-08-21 17:27:52,400 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 17:27:52,419 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 17:27:52,632 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:27:52,637 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 17:27:52,655 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:27:52,669 INFO L208 MainTranslator]: Completed translation [2020-08-21 17:27:52,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:27:52 WrapperNode [2020-08-21 17:27:52,670 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 17:27:52,670 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 17:27:52,671 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 17:27:52,671 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 17:27:52,682 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:27:52" (1/1) ... [2020-08-21 17:27:52,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:27:52" (1/1) ... [2020-08-21 17:27:52,766 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:27:52" (1/1) ... [2020-08-21 17:27:52,766 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:27:52" (1/1) ... [2020-08-21 17:27:52,773 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:27:52" (1/1) ... [2020-08-21 17:27:52,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:27:52" (1/1) ... [2020-08-21 17:27:52,781 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:27:52" (1/1) ... [2020-08-21 17:27:52,783 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 17:27:52,784 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 17:27:52,784 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 17:27:52,784 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 17:27:52,785 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:27:52" (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 17:27:52,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 17:27:52,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 17:27:52,852 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 17:27:52,853 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 17:27:52,853 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2020-08-21 17:27:52,853 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 17:27:52,853 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 17:27:52,853 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 17:27:52,853 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 17:27:52,854 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 17:27:52,854 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-21 17:27:52,854 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 17:27:52,854 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2020-08-21 17:27:52,854 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 17:27:52,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 17:27:52,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 17:27:53,118 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 17:27:53,118 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 17:27:53,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:27:53 BoogieIcfgContainer [2020-08-21 17:27:53,123 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 17:27:53,136 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 17:27:53,137 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 17:27:53,142 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 17:27:53,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 05:27:52" (1/3) ... [2020-08-21 17:27:53,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6205b1e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:27:53, skipping insertion in model container [2020-08-21 17:27:53,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:27:52" (2/3) ... [2020-08-21 17:27:53,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6205b1e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:27:53, skipping insertion in model container [2020-08-21 17:27:53,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:27:53" (3/3) ... [2020-08-21 17:27:53,147 INFO L109 eAbstractionObserver]: Analyzing ICFG trex04.c [2020-08-21 17:27:53,169 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 17:27:53,196 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 17:27:53,234 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 17:27:53,255 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 17:27:53,256 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 17:27:53,256 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 17:27:53,256 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 17:27:53,256 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 17:27:53,256 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 17:27:53,256 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 17:27:53,256 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 17:27:53,273 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-08-21 17:27:53,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 17:27:53,279 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:53,280 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:27:53,280 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:53,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:53,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1434576833, now seen corresponding path program 1 times [2020-08-21 17:27:53,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:53,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [891110789] [2020-08-21 17:27:53,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:53,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:53,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:53,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:53,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:27:53,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [891110789] [2020-08-21 17:27:53,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:27:53,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-21 17:27:53,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790499265] [2020-08-21 17:27:53,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-21 17:27:53,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:53,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-21 17:27:53,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-21 17:27:53,452 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2020-08-21 17:27:53,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:53,479 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-08-21 17:27:53,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-21 17:27:53,480 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2020-08-21 17:27:53,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:53,491 INFO L225 Difference]: With dead ends: 41 [2020-08-21 17:27:53,491 INFO L226 Difference]: Without dead ends: 24 [2020-08-21 17:27:53,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 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 17:27:53,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-21 17:27:53,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-21 17:27:53,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-21 17:27:53,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2020-08-21 17:27:53,540 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 16 [2020-08-21 17:27:53,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:53,541 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2020-08-21 17:27:53,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-21 17:27:53,541 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2020-08-21 17:27:53,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 17:27:53,543 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:53,543 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:27:53,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 17:27:53,544 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:53,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:53,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1438270917, now seen corresponding path program 1 times [2020-08-21 17:27:53,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:53,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857541174] [2020-08-21 17:27:53,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:53,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:53,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:53,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:53,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:27:53,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857541174] [2020-08-21 17:27:53,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:27:53,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 17:27:53,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936306902] [2020-08-21 17:27:53,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 17:27:53,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:53,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 17:27:53,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 17:27:53,679 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand 5 states. [2020-08-21 17:27:53,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:53,715 INFO L93 Difference]: Finished difference Result 24 states and 31 transitions. [2020-08-21 17:27:53,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 17:27:53,716 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-21 17:27:53,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:53,716 INFO L225 Difference]: With dead ends: 24 [2020-08-21 17:27:53,717 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 17:27:53,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 17:27:53,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 17:27:53,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 17:27:53,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 17:27:53,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 17:27:53,719 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2020-08-21 17:27:53,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:53,720 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 17:27:53,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 17:27:53,720 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 17:27:53,720 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 17:27:53,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 17:27:53,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 17:27:53,754 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 17:27:53,755 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 17:27:53,755 INFO L268 CegarLoopResult]: For program point fooEXIT(lines 16 23) no Hoare annotation was computed. [2020-08-21 17:27:53,755 INFO L271 CegarLoopResult]: At program point fooENTRY(lines 16 23) the Hoare annotation is: true [2020-08-21 17:27:53,755 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-08-21 17:27:53,755 INFO L268 CegarLoopResult]: For program point L21-1(lines 16 23) no Hoare annotation was computed. [2020-08-21 17:27:53,756 INFO L268 CegarLoopResult]: For program point L20-2(lines 17 23) no Hoare annotation was computed. [2020-08-21 17:27:53,756 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 17:27:53,756 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 17:27:53,756 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 17:27:53,757 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 17:27:53,757 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-21 17:27:53,757 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-21 17:27:53,757 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-08-21 17:27:53,757 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-21 17:27:53,758 INFO L271 CegarLoopResult]: At program point L33(line 33) the Hoare annotation is: true [2020-08-21 17:27:53,758 INFO L268 CegarLoopResult]: For program point L33-2(line 33) no Hoare annotation was computed. [2020-08-21 17:27:53,758 INFO L268 CegarLoopResult]: For program point L29(line 29) no Hoare annotation was computed. [2020-08-21 17:27:53,758 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 46) no Hoare annotation was computed. [2020-08-21 17:27:53,758 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 46) no Hoare annotation was computed. [2020-08-21 17:27:53,759 INFO L268 CegarLoopResult]: For program point L40-1(lines 26 46) no Hoare annotation was computed. [2020-08-21 17:27:53,759 INFO L264 CegarLoopResult]: At program point L40-2(lines 40 43) the Hoare annotation is: (<= main_~x~0 0) [2020-08-21 17:27:53,759 INFO L268 CegarLoopResult]: For program point L32(line 32) no Hoare annotation was computed. [2020-08-21 17:27:53,759 INFO L268 CegarLoopResult]: For program point L32-2(lines 26 46) no Hoare annotation was computed. [2020-08-21 17:27:53,760 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 46) the Hoare annotation is: true [2020-08-21 17:27:53,760 INFO L268 CegarLoopResult]: For program point L37(line 37) no Hoare annotation was computed. [2020-08-21 17:27:53,760 INFO L271 CegarLoopResult]: At program point L37-1(line 37) the Hoare annotation is: true [2020-08-21 17:27:53,760 INFO L268 CegarLoopResult]: For program point L37-3(lines 26 46) no Hoare annotation was computed. [2020-08-21 17:27:53,760 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 7 12) the Hoare annotation is: true [2020-08-21 17:27:53,761 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 7 12) no Hoare annotation was computed. [2020-08-21 17:27:53,761 INFO L268 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2020-08-21 17:27:53,761 INFO L268 CegarLoopResult]: For program point L8(lines 8 10) no Hoare annotation was computed. [2020-08-21 17:27:53,761 INFO L268 CegarLoopResult]: For program point L8-2(lines 7 12) no Hoare annotation was computed. [2020-08-21 17:27:53,761 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 9) no Hoare annotation was computed. [2020-08-21 17:27:53,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 05:27:53 BoogieIcfgContainer [2020-08-21 17:27:53,768 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 17:27:53,771 INFO L168 Benchmark]: Toolchain (without parser) took 1388.60 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 102.5 MB in the beginning and 130.8 MB in the end (delta: -28.3 MB). Peak memory consumption was 34.1 MB. Max. memory is 7.1 GB. [2020-08-21 17:27:53,772 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.1 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-08-21 17:27:53,773 INFO L168 Benchmark]: CACSL2BoogieTranslator took 287.29 ms. Allocated memory is still 140.0 MB. Free memory was 102.5 MB in the beginning and 92.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-08-21 17:27:53,774 INFO L168 Benchmark]: Boogie Preprocessor took 112.77 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 92.8 MB in the beginning and 180.7 MB in the end (delta: -87.9 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-08-21 17:27:53,775 INFO L168 Benchmark]: RCFGBuilder took 339.75 ms. Allocated memory is still 202.4 MB. Free memory was 180.7 MB in the beginning and 164.5 MB in the end (delta: 16.2 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. [2020-08-21 17:27:53,776 INFO L168 Benchmark]: TraceAbstraction took 631.78 ms. Allocated memory is still 202.4 MB. Free memory was 164.5 MB in the beginning and 130.8 MB in the end (delta: 33.6 MB). Peak memory consumption was 33.6 MB. Max. memory is 7.1 GB. [2020-08-21 17:27:53,780 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 140.0 MB. Free memory was 121.5 MB in the beginning and 121.1 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 287.29 ms. Allocated memory is still 140.0 MB. Free memory was 102.5 MB in the beginning and 92.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.77 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 92.8 MB in the beginning and 180.7 MB in the end (delta: -87.9 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 339.75 ms. Allocated memory is still 202.4 MB. Free memory was 180.7 MB in the beginning and 164.5 MB in the end (delta: 16.2 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 631.78 ms. Allocated memory is still 202.4 MB. Free memory was 164.5 MB in the beginning and 130.8 MB in the end (delta: 33.6 MB). Peak memory consumption was 33.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 9]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 66 SDtfs, 1 SDslu, 79 SDs, 0 SdLazy, 5 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 11 PreInvPairs, 12 NumberOfFragments, 11 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 32 NumberOfCodeBlocks, 32 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 30 ConstructedInterpolants, 0 QuantifiedInterpolants, 570 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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 correct! Received shutdown request...