/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/trex01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:48:27,152 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:48:27,156 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:48:27,172 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:48:27,173 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:48:27,174 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:48:27,175 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:48:27,177 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:48:27,182 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:48:27,183 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:48:27,187 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:48:27,189 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:48:27,191 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:48:27,193 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:48:27,194 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:48:27,196 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:48:27,197 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:48:27,198 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:48:27,204 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:48:27,210 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:48:27,213 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:48:27,219 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:48:27,221 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:48:27,222 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:48:27,227 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 11:48:27,243 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:48:27,245 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:48:27,247 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:48:27,248 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 11:48:27,290 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:48:27,291 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:48:27,296 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:48:27,297 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:48:27,297 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:48:27,297 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:48:27,297 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:48:27,297 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:48:27,298 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:48:27,298 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:48:27,298 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:48:27,298 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:48:27,298 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:48:27,299 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:48:27,299 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:48:27,299 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:48:27,303 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:48:27,304 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:48:27,304 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:48:27,304 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:48:27,305 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:48:27,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:48:27,307 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:48:27,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:48:27,308 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:48:27,308 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:48:27,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:27,309 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:48:27,309 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:48:27,309 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 -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 11:48:27,640 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:48:27,664 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:48:27,668 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:48:27,670 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:48:27,671 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:48:27,672 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex01-1.c [2020-07-20 11:48:27,772 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4f5ae6bf/ea8d7d2a877e493db826db65660bb9e8/FLAG612f5214b [2020-07-20 11:48:28,376 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:48:28,377 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/trex01-1.c [2020-07-20 11:48:28,387 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4f5ae6bf/ea8d7d2a877e493db826db65660bb9e8/FLAG612f5214b [2020-07-20 11:48:28,681 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4f5ae6bf/ea8d7d2a877e493db826db65660bb9e8 [2020-07-20 11:48:28,695 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:48:28,700 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:48:28,702 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:48:28,703 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:48:28,706 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:48:28,708 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:48:28" (1/1) ... [2020-07-20 11:48:28,712 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13fccb98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:28, skipping insertion in model container [2020-07-20 11:48:28,713 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:48:28" (1/1) ... [2020-07-20 11:48:28,725 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:48:28,751 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:48:28,994 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:48:28,999 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:48:29,022 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:48:29,043 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:48:29,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:29 WrapperNode [2020-07-20 11:48:29,045 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:48:29,046 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:48:29,046 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:48:29,047 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:48:29,059 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:29" (1/1) ... [2020-07-20 11:48:29,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:29" (1/1) ... [2020-07-20 11:48:29,186 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:29" (1/1) ... [2020-07-20 11:48:29,186 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:29" (1/1) ... [2020-07-20 11:48:29,198 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:29" (1/1) ... [2020-07-20 11:48:29,205 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:29" (1/1) ... [2020-07-20 11:48:29,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:29" (1/1) ... [2020-07-20 11:48:29,209 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:48:29,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:48:29,211 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:48:29,211 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:48:29,213 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:48:29,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:48:29,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:48:29,312 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 11:48:29,313 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-07-20 11:48:29,313 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:48:29,313 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:48:29,313 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 11:48:29,315 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 11:48:29,315 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:48:29,315 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-07-20 11:48:29,316 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:48:29,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:48:29,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:48:29,600 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:48:29,601 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-20 11:48:29,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:48:29 BoogieIcfgContainer [2020-07-20 11:48:29,608 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:48:29,610 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:48:29,611 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:48:29,616 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:48:29,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:48:28" (1/3) ... [2020-07-20 11:48:29,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6afc9f53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:48:29, skipping insertion in model container [2020-07-20 11:48:29,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:29" (2/3) ... [2020-07-20 11:48:29,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6afc9f53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:48:29, skipping insertion in model container [2020-07-20 11:48:29,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:48:29" (3/3) ... [2020-07-20 11:48:29,623 INFO L109 eAbstractionObserver]: Analyzing ICFG trex01-1.c [2020-07-20 11:48:29,640 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:48:29,653 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:48:29,690 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:48:29,770 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:48:29,771 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:48:29,772 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:48:29,772 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:48:29,772 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:48:29,773 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:48:29,773 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:48:29,773 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:48:29,806 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-07-20 11:48:29,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 11:48:29,817 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:48:29,818 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:48:29,819 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:48:29,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:48:29,828 INFO L82 PathProgramCache]: Analyzing trace with hash -355556993, now seen corresponding path program 1 times [2020-07-20 11:48:29,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:48:29,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911917776] [2020-07-20 11:48:29,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:29,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:48:29,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 11:48:29,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:48:29,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:48:29,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:48:29,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911917776] [2020-07-20 11:48:29,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:48:29,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 11:48:29,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012924704] [2020-07-20 11:48:29,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 11:48:29,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:48:30,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 11:48:30,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:48:30,007 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2020-07-20 11:48:30,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:48:30,045 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2020-07-20 11:48:30,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 11:48:30,047 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-07-20 11:48:30,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:48:30,057 INFO L225 Difference]: With dead ends: 45 [2020-07-20 11:48:30,058 INFO L226 Difference]: Without dead ends: 16 [2020-07-20 11:48:30,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:48:30,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-07-20 11:48:30,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-07-20 11:48:30,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-07-20 11:48:30,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-07-20 11:48:30,108 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2020-07-20 11:48:30,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:48:30,109 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-07-20 11:48:30,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 11:48:30,109 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-07-20 11:48:30,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 11:48:30,110 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:48:30,110 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:48:30,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:30,313 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:48:30,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:48:30,314 INFO L82 PathProgramCache]: Analyzing trace with hash -359251077, now seen corresponding path program 1 times [2020-07-20 11:48:30,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:48:30,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1004141026] [2020-07-20 11:48:30,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:30,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:48:30,369 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:48:30,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:48:30,383 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:48:30,403 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 11:48:30,403 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 11:48:30,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:30,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:48:30 BoogieIcfgContainer [2020-07-20 11:48:30,653 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:48:30,657 INFO L168 Benchmark]: Toolchain (without parser) took 1957.54 ms. Allocated memory was 137.9 MB in the beginning and 203.4 MB in the end (delta: 65.5 MB). Free memory was 101.1 MB in the beginning and 139.4 MB in the end (delta: -38.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:48:30,659 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 137.9 MB. Free memory is still 119.1 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 11:48:30,661 INFO L168 Benchmark]: CACSL2BoogieTranslator took 343.06 ms. Allocated memory is still 137.9 MB. Free memory was 101.1 MB in the beginning and 91.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-20 11:48:30,663 INFO L168 Benchmark]: Boogie Preprocessor took 163.72 ms. Allocated memory was 137.9 MB in the beginning and 203.4 MB in the end (delta: 65.5 MB). Free memory was 91.1 MB in the beginning and 181.9 MB in the end (delta: -90.8 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-20 11:48:30,665 INFO L168 Benchmark]: RCFGBuilder took 397.81 ms. Allocated memory is still 203.4 MB. Free memory was 181.9 MB in the beginning and 168.5 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-07-20 11:48:30,667 INFO L168 Benchmark]: TraceAbstraction took 1042.98 ms. Allocated memory is still 203.4 MB. Free memory was 167.6 MB in the beginning and 139.4 MB in the end (delta: 28.2 MB). Peak memory consumption was 28.2 MB. Max. memory is 7.1 GB. [2020-07-20 11:48:30,680 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 137.9 MB. Free memory is still 119.1 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 343.06 ms. Allocated memory is still 137.9 MB. Free memory was 101.1 MB in the beginning and 91.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 163.72 ms. Allocated memory was 137.9 MB in the beginning and 203.4 MB in the end (delta: 65.5 MB). Free memory was 91.1 MB in the beginning and 181.9 MB in the end (delta: -90.8 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 397.81 ms. Allocated memory is still 203.4 MB. Free memory was 181.9 MB in the beginning and 168.5 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1042.98 ms. Allocated memory is still 203.4 MB. Free memory was 167.6 MB in the beginning and 139.4 MB in the end (delta: 28.2 MB). Peak memory consumption was 28.2 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: [L34] _Bool c = __VERIFIER_nondet_bool(); [L35] COND FALSE !(\read(c)) VAL [c=0] [L38] CALL f(2) VAL [\old(d)=2] [L13] int x = __VERIFIER_nondet_int(), y = __VERIFIER_nondet_int(), k = __VERIFIER_nondet_int(), z = 1; [L13] int x = __VERIFIER_nondet_int(), y = __VERIFIER_nondet_int(), k = __VERIFIER_nondet_int(), z = 1; [L13] int x = __VERIFIER_nondet_int(), y = __VERIFIER_nondet_int(), k = __VERIFIER_nondet_int(), z = 1; [L13] int x = __VERIFIER_nondet_int(), y = __VERIFIER_nondet_int(), k = __VERIFIER_nondet_int(), z = 1; VAL [\old(d)=2, d=2, k=0, x=0, y=0, z=1] [L14] COND FALSE !(!(k <= 1073741823)) VAL [\old(d)=2, d=2, k=0, x=0, y=0, z=1] [L17] COND FALSE !(z < k) VAL [\old(d)=2, d=2, k=0, x=0, y=0, z=1] [L18] CALL __VERIFIER_assert(z>=2) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 33 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 13 ConstructedInterpolants, 0 QuantifiedInterpolants, 169 SizeOfPredicates, 0 NumberOfNonLiveVariables, 45 ConjunctsInSsa, 1 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...