/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 SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/array-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 14:00:55,403 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 14:00:55,406 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 14:00:55,424 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 14:00:55,424 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 14:00:55,426 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 14:00:55,427 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 14:00:55,440 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 14:00:55,442 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 14:00:55,444 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 14:00:55,445 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 14:00:55,446 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 14:00:55,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 14:00:55,449 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 14:00:55,450 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 14:00:55,451 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 14:00:55,451 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 14:00:55,452 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 14:00:55,456 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 14:00:55,458 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 14:00:55,461 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 14:00:55,464 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 14:00:55,465 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 14:00:55,466 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 14:00:55,471 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 14:00:55,482 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 14:00:55,483 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 14:00:55,485 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 14:00:55,486 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 [2020-07-21 14:00:55,505 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 14:00:55,506 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 14:00:55,508 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 14:00:55,508 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 14:00:55,509 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 14:00:55,509 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 14:00:55,509 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 14:00:55,509 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 14:00:55,509 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 14:00:55,510 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 14:00:55,510 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 14:00:55,510 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 14:00:55,510 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 14:00:55,510 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 14:00:55,511 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 14:00:55,511 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 14:00:55,511 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 14:00:55,511 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 14:00:55,511 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 14:00:55,512 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 14:00:55,512 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 14:00:55,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:00:55,512 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 14:00:55,512 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 14:00:55,513 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 14:00:55,513 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 14:00:55,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:00:55,513 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 14:00:55,513 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 14:00:55,514 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 -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS 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 -> 2 [2020-07-21 14:00:55,781 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 14:00:55,801 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 14:00:55,806 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 14:00:55,807 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 14:00:55,809 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 14:00:55,811 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/array-2.c [2020-07-21 14:00:55,884 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87aefeb0a/58a5596adcdc49448029c2c62be28081/FLAGafb9170cc [2020-07-21 14:00:56,381 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 14:00:56,383 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/array-2.c [2020-07-21 14:00:56,390 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87aefeb0a/58a5596adcdc49448029c2c62be28081/FLAGafb9170cc [2020-07-21 14:00:56,804 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87aefeb0a/58a5596adcdc49448029c2c62be28081 [2020-07-21 14:00:56,812 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 14:00:56,814 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 14:00:56,816 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 14:00:56,816 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 14:00:56,822 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 14:00:56,823 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:00:56" (1/1) ... [2020-07-21 14:00:56,826 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2df9bfd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:00:56, skipping insertion in model container [2020-07-21 14:00:56,826 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:00:56" (1/1) ... [2020-07-21 14:00:56,833 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 14:00:56,849 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 14:00:57,028 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:00:57,033 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 14:00:57,056 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:00:57,078 INFO L208 MainTranslator]: Completed translation [2020-07-21 14:00:57,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:00:57 WrapperNode [2020-07-21 14:00:57,079 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 14:00:57,080 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 14:00:57,080 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 14:00:57,080 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 14:00:57,185 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:00:57" (1/1) ... [2020-07-21 14:00:57,185 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:00:57" (1/1) ... [2020-07-21 14:00:57,194 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:00:57" (1/1) ... [2020-07-21 14:00:57,194 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:00:57" (1/1) ... [2020-07-21 14:00:57,201 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:00:57" (1/1) ... [2020-07-21 14:00:57,206 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:00:57" (1/1) ... [2020-07-21 14:00:57,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:00:57" (1/1) ... [2020-07-21 14:00:57,209 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 14:00:57,210 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 14:00:57,210 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 14:00:57,210 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 14:00:57,211 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:00:57" (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 [2020-07-21 14:00:57,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 14:00:57,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 14:00:57,290 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 14:00:57,290 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 14:00:57,290 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 14:00:57,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 14:00:57,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 14:00:57,291 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 14:00:57,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 14:00:57,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 14:00:57,292 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 14:00:57,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 14:00:57,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 14:00:57,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 14:00:57,551 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 14:00:57,552 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 14:00:57,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:00:57 BoogieIcfgContainer [2020-07-21 14:00:57,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 14:00:57,568 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 14:00:57,568 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 14:00:57,576 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 14:00:57,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:00:56" (1/3) ... [2020-07-21 14:00:57,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fc62b75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:00:57, skipping insertion in model container [2020-07-21 14:00:57,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:00:57" (2/3) ... [2020-07-21 14:00:57,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fc62b75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:00:57, skipping insertion in model container [2020-07-21 14:00:57,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:00:57" (3/3) ... [2020-07-21 14:00:57,597 INFO L109 eAbstractionObserver]: Analyzing ICFG array-2.c [2020-07-21 14:00:57,616 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 14:00:57,622 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 14:00:57,636 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 14:00:57,658 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 14:00:57,658 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 14:00:57,658 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 14:00:57,658 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 14:00:57,658 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 14:00:57,659 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 14:00:57,659 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 14:00:57,659 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 14:00:57,675 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-07-21 14:00:57,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-21 14:00:57,681 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:00:57,682 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:00:57,682 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:00:57,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:00:57,688 INFO L82 PathProgramCache]: Analyzing trace with hash 202253298, now seen corresponding path program 1 times [2020-07-21 14:00:57,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:00:57,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23454942] [2020-07-21 14:00:57,696 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 [2020-07-21 14:00:57,813 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:00:57,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:00:57,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 14:00:57,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:00:57,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:00:57,843 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:00:57,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [23454942] [2020-07-21 14:00:57,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:00:57,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 14:00:57,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447313734] [2020-07-21 14:00:57,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 14:00:57,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:00:57,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 14:00:57,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 14:00:57,867 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-07-21 14:00:57,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:00:57,892 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2020-07-21 14:00:57,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 14:00:57,894 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-07-21 14:00:57,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:00:57,902 INFO L225 Difference]: With dead ends: 35 [2020-07-21 14:00:57,903 INFO L226 Difference]: Without dead ends: 15 [2020-07-21 14:00:57,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 14:00:57,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-21 14:00:57,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-21 14:00:57,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-21 14:00:57,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-21 14:00:57,948 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-07-21 14:00:57,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:00:57,948 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-21 14:00:57,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 14:00:57,949 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-21 14:00:57,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-21 14:00:57,950 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:00:57,950 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:00:58,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:00:58,164 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:00:58,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:00:58,166 INFO L82 PathProgramCache]: Analyzing trace with hash -112667363, now seen corresponding path program 1 times [2020-07-21 14:00:58,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:00:58,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420908691] [2020-07-21 14:00:58,168 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 [2020-07-21 14:00:58,230 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:00:58,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:00:58,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 14:00:58,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:00:58,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:00:58,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:00:58,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420908691] [2020-07-21 14:00:58,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:00:58,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:00:58,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805180178] [2020-07-21 14:00:58,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:00:58,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:00:58,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:00:58,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:00:58,279 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 3 states. [2020-07-21 14:00:58,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:00:58,310 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-07-21 14:00:58,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:00:58,311 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-07-21 14:00:58,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:00:58,312 INFO L225 Difference]: With dead ends: 24 [2020-07-21 14:00:58,312 INFO L226 Difference]: Without dead ends: 18 [2020-07-21 14:00:58,313 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:00:58,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-21 14:00:58,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2020-07-21 14:00:58,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-07-21 14:00:58,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-07-21 14:00:58,319 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2020-07-21 14:00:58,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:00:58,320 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-07-21 14:00:58,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:00:58,320 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-07-21 14:00:58,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 14:00:58,321 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:00:58,321 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:00:58,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:00:58,529 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:00:58,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:00:58,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1912057964, now seen corresponding path program 1 times [2020-07-21 14:00:58,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:00:58,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653243714] [2020-07-21 14:00:58,532 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 [2020-07-21 14:00:58,614 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:00:58,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 14:00:58,615 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 14:00:58,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 14:00:58,643 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 14:00:58,685 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 14:00:58,686 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 14:00:58,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:00:58,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 02:00:58 BoogieIcfgContainer [2020-07-21 14:00:58,928 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 14:00:58,931 INFO L168 Benchmark]: Toolchain (without parser) took 2116.86 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 102.1 MB in the beginning and 120.0 MB in the end (delta: -17.8 MB). Peak memory consumption was 46.7 MB. Max. memory is 7.1 GB. [2020-07-21 14:00:58,932 INFO L168 Benchmark]: CDTParser took 1.74 ms. Allocated memory is still 138.4 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 14:00:58,933 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.83 ms. Allocated memory is still 138.4 MB. Free memory was 101.7 MB in the beginning and 91.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-21 14:00:58,934 INFO L168 Benchmark]: Boogie Preprocessor took 129.93 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 91.9 MB in the beginning and 180.9 MB in the end (delta: -89.0 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-21 14:00:58,935 INFO L168 Benchmark]: RCFGBuilder took 346.55 ms. Allocated memory is still 202.9 MB. Free memory was 180.3 MB in the beginning and 166.2 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-21 14:00:58,936 INFO L168 Benchmark]: TraceAbstraction took 1360.99 ms. Allocated memory is still 202.9 MB. Free memory was 165.5 MB in the beginning and 120.0 MB in the end (delta: 45.5 MB). Peak memory consumption was 45.5 MB. Max. memory is 7.1 GB. [2020-07-21 14:00:58,940 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.74 ms. Allocated memory is still 138.4 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 263.83 ms. Allocated memory is still 138.4 MB. Free memory was 101.7 MB in the beginning and 91.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 129.93 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 91.9 MB in the beginning and 180.9 MB in the end (delta: -89.0 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 346.55 ms. Allocated memory is still 202.9 MB. Free memory was 180.3 MB in the beginning and 166.2 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1360.99 ms. Allocated memory is still 202.9 MB. Free memory was 165.5 MB in the beginning and 120.0 MB in the end (delta: 45.5 MB). Peak memory consumption was 45.5 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] unsigned int SIZE=1; [L14] unsigned int j,k; [L15] int array[SIZE], menor; [L17] menor = __VERIFIER_nondet_int() [L19] j=0 VAL [array={2:0}, j=0, menor=0, SIZE=1] [L19] COND TRUE jmenor) 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, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 36 SDtfs, 3 SDslu, 11 SDs, 0 SdLazy, 7 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 39 NumberOfCodeBlocks, 33 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 22 ConstructedInterpolants, 0 QuantifiedInterpolants, 308 SizeOfPredicates, 2 NumberOfNonLiveVariables, 98 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...