/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/sum_array-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:48:17,885 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:48:17,888 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:48:17,901 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:48:17,901 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:48:17,902 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:48:17,904 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:48:17,906 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:48:17,908 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:48:17,909 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:48:17,911 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:48:17,912 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:48:17,912 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:48:17,914 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:48:17,915 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:48:17,917 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:48:17,918 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:48:17,919 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:48:17,921 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:48:17,924 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:48:17,926 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:48:17,927 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:48:17,929 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:48:17,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:48:17,934 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 11:48:17,944 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:48:17,945 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:48:17,946 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:48:17,947 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 11:48:17,964 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:48:17,964 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:48:17,966 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:48:17,966 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:48:17,966 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:48:17,966 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:48:17,967 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:48:17,967 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:48:17,967 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:48:17,967 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:48:17,967 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:48:17,968 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:48:17,968 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:48:17,968 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:48:17,968 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:48:17,968 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:48:17,969 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:48:17,969 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:48:17,969 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:48:17,969 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:48:17,970 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:48:17,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:48:17,970 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:48:17,970 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:48:17,970 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:48:17,971 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:48:17,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:17,971 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:48:17,971 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:48:17,971 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 11:48:18,283 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:48:18,308 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:48:18,312 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:48:18,314 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:48:18,318 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:48:18,320 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum_array-1.c [2020-07-20 11:48:18,415 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b4fc8450/48e174b6b4b24095bbc3df7cf22f0660/FLAG02152bd0f [2020-07-20 11:48:19,000 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:48:19,001 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum_array-1.c [2020-07-20 11:48:19,009 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b4fc8450/48e174b6b4b24095bbc3df7cf22f0660/FLAG02152bd0f [2020-07-20 11:48:19,343 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b4fc8450/48e174b6b4b24095bbc3df7cf22f0660 [2020-07-20 11:48:19,354 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:48:19,358 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:48:19,362 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:48:19,362 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:48:19,366 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:48:19,368 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:48:19" (1/1) ... [2020-07-20 11:48:19,372 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d0c3774 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 11:48:19,372 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:48:19" (1/1) ... [2020-07-20 11:48:19,383 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:48:19,407 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:48:19,609 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:48:19,614 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:48:19,645 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:48:19,669 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:48:19,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:19 WrapperNode [2020-07-20 11:48:19,670 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:48:19,671 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:48:19,672 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:48:19,672 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:48:19,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:19" (1/1) ... [2020-07-20 11:48:19,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:19" (1/1) ... [2020-07-20 11:48:19,794 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:19" (1/1) ... [2020-07-20 11:48:19,794 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:19" (1/1) ... [2020-07-20 11:48:19,804 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:19" (1/1) ... [2020-07-20 11:48:19,811 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:19" (1/1) ... [2020-07-20 11:48:19,814 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:19" (1/1) ... [2020-07-20 11:48:19,816 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:48:19,817 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:48:19,817 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:48:19,818 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:48:19,819 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:19" (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 11:48:19,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:48:19,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:48:19,911 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 11:48:19,912 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:48:19,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:48:19,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:48:19,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 11:48:19,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-20 11:48:19,912 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:48:19,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 11:48:19,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 11:48:19,913 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 11:48:19,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 11:48:19,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:48:19,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:48:20,295 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:48:20,296 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-20 11:48:20,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:48:20 BoogieIcfgContainer [2020-07-20 11:48:20,301 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:48:20,303 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:48:20,303 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:48:20,307 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:48:20,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:48:19" (1/3) ... [2020-07-20 11:48:20,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38dc0414 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 11:48:20,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:19" (2/3) ... [2020-07-20 11:48:20,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38dc0414 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 11:48:20,310 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 11:48:20,312 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_array-1.c [2020-07-20 11:48:20,326 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:48:20,335 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:48:20,349 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:48:20,377 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:48:20,377 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:48:20,377 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:48:20,378 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:48:20,378 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:48:20,378 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:48:20,379 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:48:20,379 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:48:20,401 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-07-20 11:48:20,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 11:48:20,407 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:48:20,409 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:48:20,409 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:48:20,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:48:20,415 INFO L82 PathProgramCache]: Analyzing trace with hash 415311520, now seen corresponding path program 1 times [2020-07-20 11:48:20,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:48:20,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495265003] [2020-07-20 11:48:20,425 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 11:48:20,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:48:20,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 11:48:20,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:48:20,566 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 11:48:20,567 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:48:20,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495265003] [2020-07-20 11:48:20,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:48:20,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 11:48:20,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36312804] [2020-07-20 11:48:20,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 11:48:20,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:48:20,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 11:48:20,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:48:20,600 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2020-07-20 11:48:20,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:48:20,633 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2020-07-20 11:48:20,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 11:48:20,635 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2020-07-20 11:48:20,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:48:20,645 INFO L225 Difference]: With dead ends: 52 [2020-07-20 11:48:20,646 INFO L226 Difference]: Without dead ends: 25 [2020-07-20 11:48:20,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 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 11:48:20,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-20 11:48:20,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-20 11:48:20,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 11:48:20,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-07-20 11:48:20,701 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2020-07-20 11:48:20,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:48:20,702 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-07-20 11:48:20,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 11:48:20,702 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-07-20 11:48:20,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 11:48:20,703 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:48:20,704 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:48:20,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:20,920 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:48:20,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:48:20,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1687882214, now seen corresponding path program 1 times [2020-07-20 11:48:20,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:48:20,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558000415] [2020-07-20 11:48:20,923 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 11:48:20,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:48:20,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 11:48:20,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:48:21,079 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 11:48:21,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:48:21,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558000415] [2020-07-20 11:48:21,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:48:21,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 11:48:21,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297332977] [2020-07-20 11:48:21,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 11:48:21,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:48:21,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 11:48:21,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:48:21,085 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 4 states. [2020-07-20 11:48:21,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:48:21,250 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2020-07-20 11:48:21,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 11:48:21,251 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-07-20 11:48:21,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:48:21,254 INFO L225 Difference]: With dead ends: 57 [2020-07-20 11:48:21,255 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 11:48:21,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:48:21,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 11:48:21,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2020-07-20 11:48:21,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 11:48:21,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-07-20 11:48:21,292 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 17 [2020-07-20 11:48:21,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:48:21,294 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-07-20 11:48:21,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 11:48:21,294 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-07-20 11:48:21,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 11:48:21,298 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:48:21,299 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:48:21,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:21,514 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:48:21,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:48:21,515 INFO L82 PathProgramCache]: Analyzing trace with hash -825329612, now seen corresponding path program 1 times [2020-07-20 11:48:21,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:48:21,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145543058] [2020-07-20 11:48:21,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:21,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:48:21,580 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:48:21,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:48:21,614 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:48:21,645 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 11:48:21,645 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 11:48:21,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:21,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:48:21 BoogieIcfgContainer [2020-07-20 11:48:21,902 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:48:21,906 INFO L168 Benchmark]: Toolchain (without parser) took 2548.13 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 102.5 MB in the beginning and 102.8 MB in the end (delta: -319.2 kB). Peak memory consumption was 57.4 MB. Max. memory is 7.1 GB. [2020-07-20 11:48:21,907 INFO L168 Benchmark]: CDTParser took 0.45 ms. Allocated memory is still 144.7 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 11:48:21,908 INFO L168 Benchmark]: CACSL2BoogieTranslator took 309.40 ms. Allocated memory is still 144.7 MB. Free memory was 102.1 MB in the beginning and 91.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:48:21,910 INFO L168 Benchmark]: Boogie Preprocessor took 145.28 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 91.7 MB in the beginning and 179.8 MB in the end (delta: -88.1 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-20 11:48:21,911 INFO L168 Benchmark]: RCFGBuilder took 484.37 ms. Allocated memory is still 202.4 MB. Free memory was 179.8 MB in the beginning and 162.2 MB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 7.1 GB. [2020-07-20 11:48:21,912 INFO L168 Benchmark]: TraceAbstraction took 1599.01 ms. Allocated memory is still 202.4 MB. Free memory was 161.5 MB in the beginning and 102.8 MB in the end (delta: 58.7 MB). Peak memory consumption was 58.7 MB. Max. memory is 7.1 GB. [2020-07-20 11:48:21,917 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.45 ms. Allocated memory is still 144.7 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 309.40 ms. Allocated memory is still 144.7 MB. Free memory was 102.1 MB in the beginning and 91.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 145.28 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 91.7 MB in the beginning and 179.8 MB in the end (delta: -88.1 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 484.37 ms. Allocated memory is still 202.4 MB. Free memory was 179.8 MB in the beginning and 162.2 MB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1599.01 ms. Allocated memory is still 202.4 MB. Free memory was 161.5 MB in the beginning and 102.8 MB in the end (delta: 58.7 MB). Peak memory consumption was 58.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] unsigned int M = __VERIFIER_nondet_uint(); [L15] int A[M], B[M], C[M]; [L16] unsigned int i; [L18] i=0 VAL [A={2:0}, B={3:0}, C={4:0}, i=0, M=1] [L18] COND TRUE i