/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 DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -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 22:17:02,070 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 22:17:02,074 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 22:17:02,096 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 22:17:02,096 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 22:17:02,099 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 22:17:02,102 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 22:17:02,115 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 22:17:02,120 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 22:17:02,122 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 22:17:02,128 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 22:17:02,129 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 22:17:02,129 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 22:17:02,131 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 22:17:02,135 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 22:17:02,137 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 22:17:02,140 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 22:17:02,141 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 22:17:02,143 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 22:17:02,149 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 22:17:02,154 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 22:17:02,158 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 22:17:02,160 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 22:17:02,162 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 22:17:02,164 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 22:17:02,179 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 22:17:02,181 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 22:17:02,184 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 22:17:02,184 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 22:17:02,228 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 22:17:02,228 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 22:17:02,230 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 22:17:02,230 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 22:17:02,230 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 22:17:02,230 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 22:17:02,230 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 22:17:02,231 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 22:17:02,231 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 22:17:02,231 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 22:17:02,231 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 22:17:02,231 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 22:17:02,232 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 22:17:02,232 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 22:17:02,232 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 22:17:02,232 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 22:17:02,233 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 22:17:02,233 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 22:17:02,233 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 22:17:02,234 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 22:17:02,234 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 22:17:02,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:17:02,234 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 22:17:02,235 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 22:17:02,235 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 22:17:02,235 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 22:17:02,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:17:02,235 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 22:17:02,236 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 22:17:02,236 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 -> DAGSIZE 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 [2020-07-20 22:17:02,543 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 22:17:02,557 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 22:17:02,563 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 22:17:02,566 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 22:17:02,566 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 22:17:02,567 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum_array-1.c [2020-07-20 22:17:02,679 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d613b5b08/1af4bd3b99f44d0583be14a17a27682f/FLAG7ae8c7436 [2020-07-20 22:17:03,385 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 22:17:03,385 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum_array-1.c [2020-07-20 22:17:03,396 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d613b5b08/1af4bd3b99f44d0583be14a17a27682f/FLAG7ae8c7436 [2020-07-20 22:17:03,707 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d613b5b08/1af4bd3b99f44d0583be14a17a27682f [2020-07-20 22:17:03,724 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 22:17:03,730 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 22:17:03,736 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 22:17:03,736 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 22:17:03,742 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 22:17:03,743 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:17:03" (1/1) ... [2020-07-20 22:17:03,750 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@113c951a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:17:03, skipping insertion in model container [2020-07-20 22:17:03,751 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:17:03" (1/1) ... [2020-07-20 22:17:03,765 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 22:17:03,795 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 22:17:04,025 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:17:04,033 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 22:17:04,067 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:17:04,094 INFO L208 MainTranslator]: Completed translation [2020-07-20 22:17:04,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:17:04 WrapperNode [2020-07-20 22:17:04,095 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 22:17:04,095 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 22:17:04,096 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 22:17:04,096 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 22:17:04,227 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:17:04" (1/1) ... [2020-07-20 22:17:04,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:17:04" (1/1) ... [2020-07-20 22:17:04,240 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:17:04" (1/1) ... [2020-07-20 22:17:04,241 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:17:04" (1/1) ... [2020-07-20 22:17:04,253 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:17:04" (1/1) ... [2020-07-20 22:17:04,261 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:17:04" (1/1) ... [2020-07-20 22:17:04,264 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:17:04" (1/1) ... [2020-07-20 22:17:04,267 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 22:17:04,268 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 22:17:04,268 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 22:17:04,269 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 22:17:04,271 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:17:04" (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 22:17:04,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 22:17:04,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 22:17:04,368 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 22:17:04,368 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 22:17:04,368 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 22:17:04,369 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 22:17:04,369 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 22:17:04,369 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-20 22:17:04,369 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 22:17:04,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 22:17:04,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 22:17:04,370 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 22:17:04,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 22:17:04,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 22:17:04,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 22:17:04,787 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 22:17:04,787 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-20 22:17:04,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:17:04 BoogieIcfgContainer [2020-07-20 22:17:04,793 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 22:17:04,795 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 22:17:04,795 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 22:17:04,798 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 22:17:04,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:17:03" (1/3) ... [2020-07-20 22:17:04,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cac1cdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:17:04, skipping insertion in model container [2020-07-20 22:17:04,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:17:04" (2/3) ... [2020-07-20 22:17:04,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cac1cdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:17:04, skipping insertion in model container [2020-07-20 22:17:04,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:17:04" (3/3) ... [2020-07-20 22:17:04,802 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_array-1.c [2020-07-20 22:17:04,815 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 22:17:04,824 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 22:17:04,842 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 22:17:04,872 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 22:17:04,873 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 22:17:04,873 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 22:17:04,873 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 22:17:04,873 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 22:17:04,873 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 22:17:04,874 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 22:17:04,874 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 22:17:04,896 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-07-20 22:17:04,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 22:17:04,905 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:17:04,906 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 22:17:04,906 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:17:04,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:17:04,914 INFO L82 PathProgramCache]: Analyzing trace with hash 415311520, now seen corresponding path program 1 times [2020-07-20 22:17:04,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:17:04,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874773550] [2020-07-20 22:17:04,926 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 22:17:05,051 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:17:05,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:17:05,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 22:17:05,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:17:05,144 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 22:17:05,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:17:05,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874773550] [2020-07-20 22:17:05,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:17:05,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 22:17:05,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494803569] [2020-07-20 22:17:05,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 22:17:05,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:17:05,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 22:17:05,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 22:17:05,177 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 4 states. [2020-07-20 22:17:05,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:17:05,409 INFO L93 Difference]: Finished difference Result 71 states and 102 transitions. [2020-07-20 22:17:05,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 22:17:05,412 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-07-20 22:17:05,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:17:05,428 INFO L225 Difference]: With dead ends: 71 [2020-07-20 22:17:05,429 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 22:17:05,433 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 22:17:05,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 22:17:05,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2020-07-20 22:17:05,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 22:17:05,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-07-20 22:17:05,500 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 17 [2020-07-20 22:17:05,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:17:05,501 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-07-20 22:17:05,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 22:17:05,501 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-07-20 22:17:05,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 22:17:05,503 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:17:05,503 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 22:17:05,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:17:05,718 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:17:05,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:17:05,719 INFO L82 PathProgramCache]: Analyzing trace with hash -825329612, now seen corresponding path program 1 times [2020-07-20 22:17:05,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:17:05,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880451753] [2020-07-20 22:17:05,721 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 22:17:05,832 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 22:17:05,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 22:17:05,833 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 22:17:05,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 22:17:05,874 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 22:17:05,905 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 22:17:05,906 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 22:17:06,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:17:06,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:17:06 BoogieIcfgContainer [2020-07-20 22:17:06,153 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 22:17:06,157 INFO L168 Benchmark]: Toolchain (without parser) took 2429.29 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 101.8 MB in the beginning and 110.6 MB in the end (delta: -8.8 MB). Peak memory consumption was 55.7 MB. Max. memory is 7.1 GB. [2020-07-20 22:17:06,159 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 138.4 MB. Free memory was 120.1 MB in the beginning and 119.9 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-20 22:17:06,159 INFO L168 Benchmark]: CACSL2BoogieTranslator took 359.45 ms. Allocated memory is still 138.4 MB. Free memory was 101.3 MB in the beginning and 91.0 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-20 22:17:06,161 INFO L168 Benchmark]: Boogie Preprocessor took 171.80 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 91.0 MB in the beginning and 180.2 MB in the end (delta: -89.2 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-07-20 22:17:06,162 INFO L168 Benchmark]: RCFGBuilder took 525.72 ms. Allocated memory is still 202.9 MB. Free memory was 180.2 MB in the beginning and 162.7 MB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 7.1 GB. [2020-07-20 22:17:06,163 INFO L168 Benchmark]: TraceAbstraction took 1358.85 ms. Allocated memory is still 202.9 MB. Free memory was 162.7 MB in the beginning and 110.6 MB in the end (delta: 52.1 MB). Peak memory consumption was 52.1 MB. Max. memory is 7.1 GB. [2020-07-20 22:17:06,167 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 138.4 MB. Free memory was 120.1 MB in the beginning and 119.9 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 359.45 ms. Allocated memory is still 138.4 MB. Free memory was 101.3 MB in the beginning and 91.0 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 171.80 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 91.0 MB in the beginning and 180.2 MB in the end (delta: -89.2 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 525.72 ms. Allocated memory is still 202.9 MB. Free memory was 180.2 MB in the beginning and 162.7 MB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1358.85 ms. Allocated memory is still 202.9 MB. Free memory was 162.7 MB in the beginning and 110.6 MB in the end (delta: 52.1 MB). Peak memory consumption was 52.1 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