/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/terminator_01.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:48:18,485 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:48:18,488 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:48:18,505 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:48:18,506 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:48:18,508 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:48:18,510 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:48:18,522 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:48:18,525 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:48:18,526 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:48:18,527 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:48:18,529 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:48:18,530 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:48:18,532 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:48:18,534 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:48:18,536 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:48:18,538 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:48:18,540 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:48:18,542 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:48:18,546 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:48:18,548 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:48:18,552 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:48:18,553 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:48:18,554 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:48:18,557 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 11:48:18,557 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 11:48:18,557 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 11:48:18,560 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 11:48:18,560 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 11:48:18,561 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-07-20 11:48:18,568 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:48:18,569 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:48:18,570 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:48:18,571 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 11:48:18,593 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:48:18,594 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:48:18,595 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:48:18,596 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:48:18,596 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:48:18,596 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:48:18,597 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:48:18,597 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:48:18,597 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:48:18,597 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:48:18,598 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:48:18,599 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:48:18,599 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:48:18,599 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:48:18,599 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:48:18,600 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:48:18,600 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:48:18,600 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:48:18,600 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:48:18,600 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:48:18,601 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:48:18,601 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:48:18,601 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:48:18,601 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:48:18,601 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:48:18,602 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:48:18,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:18,602 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:48:18,602 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:48:18,602 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 11:48:18,878 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:48:18,893 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:48:18,896 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:48:18,898 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:48:18,899 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:48:18,899 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/terminator_01.c [2020-07-20 11:48:18,967 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69c733d3a/5d1b4f1a61f44e16b10c3a635b25608c/FLAGa41b408a9 [2020-07-20 11:48:19,420 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:48:19,423 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/terminator_01.c [2020-07-20 11:48:19,429 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69c733d3a/5d1b4f1a61f44e16b10c3a635b25608c/FLAGa41b408a9 [2020-07-20 11:48:19,789 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69c733d3a/5d1b4f1a61f44e16b10c3a635b25608c [2020-07-20 11:48:19,799 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:48:19,802 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:48:19,803 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:48:19,803 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:48:19,806 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:48:19,807 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:48:19" (1/1) ... [2020-07-20 11:48:19,810 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c20f81a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:19, skipping insertion in model container [2020-07-20 11:48:19,811 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:48:19" (1/1) ... [2020-07-20 11:48:19,819 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:48:19,836 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:48:20,004 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:48:20,015 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:48:20,032 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:48:20,049 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:48:20,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:20 WrapperNode [2020-07-20 11:48:20,050 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:48:20,050 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:48:20,051 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:48:20,051 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:48:20,064 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:20" (1/1) ... [2020-07-20 11:48:20,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:20" (1/1) ... [2020-07-20 11:48:20,166 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:20" (1/1) ... [2020-07-20 11:48:20,167 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:20" (1/1) ... [2020-07-20 11:48:20,172 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:20" (1/1) ... [2020-07-20 11:48:20,178 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:20" (1/1) ... [2020-07-20 11:48:20,179 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:20" (1/1) ... [2020-07-20 11:48:20,187 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:48:20,189 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:48:20,189 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:48:20,189 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:48:20,190 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:20" (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 11:48:20,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:48:20,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:48:20,246 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 11:48:20,246 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:48:20,246 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:48:20,246 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 11:48:20,246 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:48:20,246 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:48:20,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 11:48:20,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-07-20 11:48:20,247 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 11:48:20,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 11:48:20,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 11:48:20,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:48:20,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:48:20,447 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:48:20,448 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 11:48:20,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:48:20 BoogieIcfgContainer [2020-07-20 11:48:20,452 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:48:20,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:48:20,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:48:20,457 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:48:20,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:48:19" (1/3) ... [2020-07-20 11:48:20,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bbc4e6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:48:20, skipping insertion in model container [2020-07-20 11:48:20,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:20" (2/3) ... [2020-07-20 11:48:20,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bbc4e6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:48:20, skipping insertion in model container [2020-07-20 11:48:20,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:48:20" (3/3) ... [2020-07-20 11:48:20,461 INFO L109 eAbstractionObserver]: Analyzing ICFG terminator_01.c [2020-07-20 11:48:20,472 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:48:20,481 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:48:20,498 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:48:20,529 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:48:20,530 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:48:20,530 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:48:20,530 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:48:20,530 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:48:20,530 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:48:20,531 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:48:20,531 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:48:20,552 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-20 11:48:20,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-20 11:48:20,559 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:48:20,561 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:48:20,561 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:48:20,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:48:20,570 INFO L82 PathProgramCache]: Analyzing trace with hash -564387615, now seen corresponding path program 1 times [2020-07-20 11:48:20,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:48:20,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43086898] [2020-07-20 11:48:20,583 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 11:48:20,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:48:20,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 11:48:20,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:48:20,691 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 11:48:20,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:48:20,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43086898] [2020-07-20 11:48:20,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:48:20,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 11:48:20,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388232155] [2020-07-20 11:48:20,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 11:48:20,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:48:20,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 11:48:20,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:48:20,716 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-07-20 11:48:20,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:48:20,738 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-07-20 11:48:20,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 11:48:20,740 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-07-20 11:48:20,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:48:20,748 INFO L225 Difference]: With dead ends: 32 [2020-07-20 11:48:20,748 INFO L226 Difference]: Without dead ends: 13 [2020-07-20 11:48:20,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:48:20,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-07-20 11:48:20,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-07-20 11:48:20,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-07-20 11:48:20,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-07-20 11:48:20,790 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-07-20 11:48:20,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:48:20,790 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-07-20 11:48:20,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 11:48:20,790 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-07-20 11:48:20,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 11:48:20,791 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:48:20,791 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:48:21,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:21,006 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:48:21,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:48:21,007 INFO L82 PathProgramCache]: Analyzing trace with hash -538271495, now seen corresponding path program 1 times [2020-07-20 11:48:21,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:48:21,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693791394] [2020-07-20 11:48:21,009 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 11:48:21,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:48:21,069 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:48:21,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:48:21,083 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:48:21,101 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 11:48:21,101 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 11:48:21,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:21,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:48:21 BoogieIcfgContainer [2020-07-20 11:48:21,344 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:48:21,347 INFO L168 Benchmark]: Toolchain (without parser) took 1545.66 ms. Allocated memory was 145.2 MB in the beginning and 203.4 MB in the end (delta: 58.2 MB). Free memory was 102.8 MB in the beginning and 137.5 MB in the end (delta: -34.7 MB). Peak memory consumption was 23.5 MB. Max. memory is 7.1 GB. [2020-07-20 11:48:21,348 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 145.2 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 11:48:21,349 INFO L168 Benchmark]: CACSL2BoogieTranslator took 247.33 ms. Allocated memory is still 145.2 MB. Free memory was 102.6 MB in the beginning and 92.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-20 11:48:21,350 INFO L168 Benchmark]: Boogie Preprocessor took 136.93 ms. Allocated memory was 145.2 MB in the beginning and 203.4 MB in the end (delta: 58.2 MB). Free memory was 92.8 MB in the beginning and 181.7 MB in the end (delta: -88.9 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:48:21,352 INFO L168 Benchmark]: RCFGBuilder took 263.64 ms. Allocated memory is still 203.4 MB. Free memory was 181.7 MB in the beginning and 168.5 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-07-20 11:48:21,353 INFO L168 Benchmark]: TraceAbstraction took 890.79 ms. Allocated memory is still 203.4 MB. Free memory was 167.8 MB in the beginning and 137.5 MB in the end (delta: 30.3 MB). Peak memory consumption was 30.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:48:21,357 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 145.2 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 247.33 ms. Allocated memory is still 145.2 MB. Free memory was 102.6 MB in the beginning and 92.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 136.93 ms. Allocated memory was 145.2 MB in the beginning and 203.4 MB in the end (delta: 58.2 MB). Free memory was 92.8 MB in the beginning and 181.7 MB in the end (delta: -88.9 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 263.64 ms. Allocated memory is still 203.4 MB. Free memory was 181.7 MB in the beginning and 168.5 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 890.79 ms. Allocated memory is still 203.4 MB. Free memory was 167.8 MB in the beginning and 137.5 MB in the end (delta: 30.3 MB). Peak memory consumption was 30.3 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=__VERIFIER_nondet_int(); [L13] int x=__VERIFIER_nondet_int(); [L14] int *p = &x; VAL [p={2:0}, x={2:0}] [L16] EXPR \read(x) VAL [\read(x)=100, p={2:0}, x={2:0}] [L16] COND FALSE !(x<100) [L19] CALL __VERIFIER_assert(0) 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 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 20 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred 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, 23 NumberOfCodeBlocks, 23 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 100 SizeOfPredicates, 0 NumberOfNonLiveVariables, 54 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...