/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/s12iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 01:47:17,527 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 01:47:17,529 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 01:47:17,546 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 01:47:17,546 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 01:47:17,547 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 01:47:17,549 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 01:47:17,550 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 01:47:17,552 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 01:47:17,553 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 01:47:17,554 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 01:47:17,555 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 01:47:17,556 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 01:47:17,557 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 01:47:17,558 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 01:47:17,559 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 01:47:17,560 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 01:47:17,561 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 01:47:17,562 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 01:47:17,564 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 01:47:17,566 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 01:47:17,567 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 01:47:17,568 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 01:47:17,569 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 01:47:17,572 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 01:47:17,580 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 01:47:17,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 01:47:17,582 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 01:47:17,582 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 01:47:17,597 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 01:47:17,598 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 01:47:17,599 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 01:47:17,599 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 01:47:17,599 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 01:47:17,600 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 01:47:17,600 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 01:47:17,600 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 01:47:17,600 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 01:47:17,600 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 01:47:17,600 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 01:47:17,601 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 01:47:17,601 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 01:47:17,601 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 01:47:17,601 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 01:47:17,601 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 01:47:17,602 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 01:47:17,602 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 01:47:17,602 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 01:47:17,602 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 01:47:17,603 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 01:47:17,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 01:47:17,603 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 01:47:17,603 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 01:47:17,603 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 01:47:17,604 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 01:47:17,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 01:47:17,604 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 01:47:17,604 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 01:47:17,604 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 01:47:17,864 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 01:47:17,878 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 01:47:17,881 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 01:47:17,883 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 01:47:17,883 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 01:47:17,884 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s12iff.c [2020-07-20 01:47:17,948 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbbf21611/117eda5ca2e5417196d8d80b7edefe6d/FLAG09d93bf6b [2020-07-20 01:47:18,374 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 01:47:18,375 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s12iff.c [2020-07-20 01:47:18,382 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbbf21611/117eda5ca2e5417196d8d80b7edefe6d/FLAG09d93bf6b [2020-07-20 01:47:18,809 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbbf21611/117eda5ca2e5417196d8d80b7edefe6d [2020-07-20 01:47:18,820 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 01:47:18,824 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 01:47:18,825 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 01:47:18,825 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 01:47:18,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 01:47:18,831 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:47:18" (1/1) ... [2020-07-20 01:47:18,834 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c3b3b64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:47:18, skipping insertion in model container [2020-07-20 01:47:18,834 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:47:18" (1/1) ... [2020-07-20 01:47:18,843 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 01:47:18,868 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 01:47:19,140 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:47:19,151 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 01:47:19,190 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:47:19,338 INFO L208 MainTranslator]: Completed translation [2020-07-20 01:47:19,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:47:19 WrapperNode [2020-07-20 01:47:19,338 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 01:47:19,339 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 01:47:19,340 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 01:47:19,340 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 01:47:19,355 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:47:19" (1/1) ... [2020-07-20 01:47:19,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:47:19" (1/1) ... [2020-07-20 01:47:19,385 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:47:19" (1/1) ... [2020-07-20 01:47:19,385 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:47:19" (1/1) ... [2020-07-20 01:47:19,395 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:47:19" (1/1) ... [2020-07-20 01:47:19,401 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:47:19" (1/1) ... [2020-07-20 01:47:19,403 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:47:19" (1/1) ... [2020-07-20 01:47:19,406 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 01:47:19,406 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 01:47:19,406 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 01:47:19,407 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 01:47:19,408 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:47:19" (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 01:47:19,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 01:47:19,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 01:47:19,478 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 01:47:19,478 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 01:47:19,479 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 01:47:19,479 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 01:47:19,479 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 01:47:19,480 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 01:47:19,480 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 01:47:19,480 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 01:47:19,480 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 01:47:19,481 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 01:47:19,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 01:47:19,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 01:47:19,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 01:47:19,483 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 01:47:19,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 01:47:19,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 01:47:19,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 01:47:19,781 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 01:47:19,782 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 01:47:19,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:47:19 BoogieIcfgContainer [2020-07-20 01:47:19,789 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 01:47:19,791 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 01:47:19,791 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 01:47:19,794 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 01:47:19,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:47:18" (1/3) ... [2020-07-20 01:47:19,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d8627b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:47:19, skipping insertion in model container [2020-07-20 01:47:19,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:47:19" (2/3) ... [2020-07-20 01:47:19,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d8627b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:47:19, skipping insertion in model container [2020-07-20 01:47:19,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:47:19" (3/3) ... [2020-07-20 01:47:19,798 INFO L109 eAbstractionObserver]: Analyzing ICFG s12iff.c [2020-07-20 01:47:19,812 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 01:47:19,821 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 01:47:19,842 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 01:47:19,873 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 01:47:19,873 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 01:47:19,873 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 01:47:19,873 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 01:47:19,874 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 01:47:19,874 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 01:47:19,874 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 01:47:19,874 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 01:47:19,903 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-07-20 01:47:19,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 01:47:19,919 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:47:19,923 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 01:47:19,923 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:47:19,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:47:19,941 INFO L82 PathProgramCache]: Analyzing trace with hash 2033030480, now seen corresponding path program 1 times [2020-07-20 01:47:19,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:47:19,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557152840] [2020-07-20 01:47:19,962 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75a40a17 [2020-07-20 01:47:20,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:47:20,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:47:20,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:47:20,187 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 01:47:20,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557152840] [2020-07-20 01:47:20,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:47:20,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 01:47:20,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161828956] [2020-07-20 01:47:20,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 01:47:20,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:47:20,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 01:47:20,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:47:20,211 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-07-20 01:47:20,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:47:20,349 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2020-07-20 01:47:20,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 01:47:20,351 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-20 01:47:20,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:47:20,360 INFO L225 Difference]: With dead ends: 62 [2020-07-20 01:47:20,361 INFO L226 Difference]: Without dead ends: 29 [2020-07-20 01:47:20,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:47:20,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-20 01:47:20,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-20 01:47:20,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-20 01:47:20,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-07-20 01:47:20,411 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 23 [2020-07-20 01:47:20,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:47:20,411 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-07-20 01:47:20,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 01:47:20,412 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-07-20 01:47:20,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 01:47:20,413 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:47:20,413 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 01:47:20,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 01:47:20,414 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:47:20,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:47:20,414 INFO L82 PathProgramCache]: Analyzing trace with hash 706992569, now seen corresponding path program 1 times [2020-07-20 01:47:20,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:47:20,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266097326] [2020-07-20 01:47:20,415 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75a40a17 [2020-07-20 01:47:20,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:47:20,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:47:20,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:47:20,530 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 01:47:20,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266097326] [2020-07-20 01:47:20,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:47:20,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 01:47:20,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032457391] [2020-07-20 01:47:20,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 01:47:20,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:47:20,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 01:47:20,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 01:47:20,535 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 5 states. [2020-07-20 01:47:20,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:47:20,685 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2020-07-20 01:47:20,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 01:47:20,686 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-07-20 01:47:20,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:47:20,687 INFO L225 Difference]: With dead ends: 51 [2020-07-20 01:47:20,687 INFO L226 Difference]: Without dead ends: 37 [2020-07-20 01:47:20,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-20 01:47:20,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-20 01:47:20,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2020-07-20 01:47:20,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 01:47:20,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-07-20 01:47:20,699 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2020-07-20 01:47:20,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:47:20,699 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-07-20 01:47:20,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 01:47:20,700 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-07-20 01:47:20,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 01:47:20,701 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:47:20,701 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:47:20,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 01:47:20,702 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:47:20,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:47:20,702 INFO L82 PathProgramCache]: Analyzing trace with hash 284203188, now seen corresponding path program 1 times [2020-07-20 01:47:20,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:47:20,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637353201] [2020-07-20 01:47:20,703 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75a40a17 [2020-07-20 01:47:20,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 01:47:20,749 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 01:47:20,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 01:47:20,814 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 01:47:20,868 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-20 01:47:20,869 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 01:47:20,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-20 01:47:20,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:47:20 BoogieIcfgContainer [2020-07-20 01:47:20,918 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 01:47:20,921 INFO L168 Benchmark]: Toolchain (without parser) took 2097.74 ms. Allocated memory was 137.9 MB in the beginning and 205.0 MB in the end (delta: 67.1 MB). Free memory was 100.9 MB in the beginning and 102.6 MB in the end (delta: -1.7 MB). Peak memory consumption was 65.4 MB. Max. memory is 7.1 GB. [2020-07-20 01:47:20,922 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 137.9 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-20 01:47:20,923 INFO L168 Benchmark]: CACSL2BoogieTranslator took 513.89 ms. Allocated memory was 137.9 MB in the beginning and 205.0 MB in the end (delta: 67.1 MB). Free memory was 100.5 MB in the beginning and 184.0 MB in the end (delta: -83.5 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. [2020-07-20 01:47:20,924 INFO L168 Benchmark]: Boogie Preprocessor took 66.41 ms. Allocated memory is still 205.0 MB. Free memory was 184.0 MB in the beginning and 181.6 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-07-20 01:47:20,925 INFO L168 Benchmark]: RCFGBuilder took 383.51 ms. Allocated memory is still 205.0 MB. Free memory was 181.6 MB in the beginning and 163.8 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 7.1 GB. [2020-07-20 01:47:20,926 INFO L168 Benchmark]: TraceAbstraction took 1127.00 ms. Allocated memory is still 205.0 MB. Free memory was 163.2 MB in the beginning and 102.6 MB in the end (delta: 60.5 MB). Peak memory consumption was 60.5 MB. Max. memory is 7.1 GB. [2020-07-20 01:47:20,931 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 137.9 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 513.89 ms. Allocated memory was 137.9 MB in the beginning and 205.0 MB in the end (delta: 67.1 MB). Free memory was 100.5 MB in the beginning and 184.0 MB in the end (delta: -83.5 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 66.41 ms. Allocated memory is still 205.0 MB. Free memory was 184.0 MB in the beginning and 181.6 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 383.51 ms. Allocated memory is still 205.0 MB. Free memory was 181.6 MB in the beginning and 163.8 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1127.00 ms. Allocated memory is still 205.0 MB. Free memory was 163.2 MB in the beginning and 102.6 MB in the end (delta: 60.5 MB). Peak memory consumption was 60.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; VAL [\old(N)=10, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=1] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=1] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=1] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=1] [L25] int i; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] sum[0] = 1 [L30] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=1, sum={5:0}] [L30] COND TRUE i