/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_VARIABLES --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/sum_array-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 16:44:16,970 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 16:44:16,973 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 16:44:16,990 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 16:44:16,991 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 16:44:16,993 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 16:44:16,994 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 16:44:17,005 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 16:44:17,010 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 16:44:17,012 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 16:44:17,013 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 16:44:17,014 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 16:44:17,015 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 16:44:17,017 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 16:44:17,019 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 16:44:17,020 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 16:44:17,022 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 16:44:17,023 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 16:44:17,024 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 16:44:17,029 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 16:44:17,033 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 16:44:17,036 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 16:44:17,037 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 16:44:17,038 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 16:44:17,041 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 16:44:17,051 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 16:44:17,052 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 16:44:17,053 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 16:44:17,053 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 16:44:17,087 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 16:44:17,090 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 16:44:17,092 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 16:44:17,092 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 16:44:17,092 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 16:44:17,094 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 16:44:17,095 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 16:44:17,095 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 16:44:17,095 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 16:44:17,095 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 16:44:17,095 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 16:44:17,095 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 16:44:17,096 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 16:44:17,096 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 16:44:17,096 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 16:44:17,096 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 16:44:17,096 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 16:44:17,097 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 16:44:17,097 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 16:44:17,097 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 16:44:17,098 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 16:44:17,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:44:17,098 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 16:44:17,098 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 16:44:17,098 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 16:44:17,099 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 16:44:17,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:17,099 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 16:44:17,099 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 16:44:17,099 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_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 -> 2 [2020-07-21 16:44:17,394 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 16:44:17,406 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 16:44:17,412 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 16:44:17,413 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 16:44:17,415 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 16:44:17,417 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum_array-1.c [2020-07-21 16:44:17,481 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6df8156bc/8cdd0bd7a610454093602c307c1fe38b/FLAGf3c0832f6 [2020-07-21 16:44:17,936 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 16:44:17,937 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum_array-1.c [2020-07-21 16:44:17,943 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6df8156bc/8cdd0bd7a610454093602c307c1fe38b/FLAGf3c0832f6 [2020-07-21 16:44:18,291 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6df8156bc/8cdd0bd7a610454093602c307c1fe38b [2020-07-21 16:44:18,301 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 16:44:18,304 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 16:44:18,309 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 16:44:18,309 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 16:44:18,313 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 16:44:18,314 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:44:18" (1/1) ... [2020-07-21 16:44:18,317 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@555a1582 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:18, skipping insertion in model container [2020-07-21 16:44:18,317 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:44:18" (1/1) ... [2020-07-21 16:44:18,325 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 16:44:18,344 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 16:44:18,602 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:44:18,610 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 16:44:18,650 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:44:18,671 INFO L208 MainTranslator]: Completed translation [2020-07-21 16:44:18,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:18 WrapperNode [2020-07-21 16:44:18,672 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 16:44:18,673 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 16:44:18,673 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 16:44:18,673 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 16:44:18,763 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:18" (1/1) ... [2020-07-21 16:44:18,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:18" (1/1) ... [2020-07-21 16:44:18,780 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:18" (1/1) ... [2020-07-21 16:44:18,780 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:18" (1/1) ... [2020-07-21 16:44:18,790 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:18" (1/1) ... [2020-07-21 16:44:18,796 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:18" (1/1) ... [2020-07-21 16:44:18,798 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:18" (1/1) ... [2020-07-21 16:44:18,800 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 16:44:18,801 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 16:44:18,801 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 16:44:18,801 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 16:44:18,802 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:18" (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 16:44:18,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 16:44:18,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 16:44:18,862 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 16:44:18,862 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 16:44:18,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 16:44:18,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 16:44:18,863 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 16:44:18,863 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-21 16:44:18,863 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 16:44:18,863 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 16:44:18,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 16:44:18,863 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 16:44:18,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 16:44:18,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 16:44:18,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 16:44:19,202 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 16:44:19,202 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-21 16:44:19,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:44:19 BoogieIcfgContainer [2020-07-21 16:44:19,206 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 16:44:19,207 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 16:44:19,207 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 16:44:19,210 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 16:44:19,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:44:18" (1/3) ... [2020-07-21 16:44:19,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f3ae840 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:44:19, skipping insertion in model container [2020-07-21 16:44:19,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:18" (2/3) ... [2020-07-21 16:44:19,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f3ae840 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:44:19, skipping insertion in model container [2020-07-21 16:44:19,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:44:19" (3/3) ... [2020-07-21 16:44:19,214 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_array-1.c [2020-07-21 16:44:19,226 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 16:44:19,233 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 16:44:19,247 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 16:44:19,271 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 16:44:19,272 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 16:44:19,272 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 16:44:19,272 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 16:44:19,272 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 16:44:19,272 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 16:44:19,272 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 16:44:19,272 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 16:44:19,290 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-07-21 16:44:19,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 16:44:19,296 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:44:19,297 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:44:19,298 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:44:19,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:44:19,304 INFO L82 PathProgramCache]: Analyzing trace with hash 415311520, now seen corresponding path program 1 times [2020-07-21 16:44:19,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:44:19,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154519416] [2020-07-21 16:44:19,313 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 16:44:19,426 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:44:19,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:44:19,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 16:44:19,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:44:19,458 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 16:44:19,459 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:44:19,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154519416] [2020-07-21 16:44:19,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:44:19,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 16:44:19,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931858827] [2020-07-21 16:44:19,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 16:44:19,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:44:19,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 16:44:19,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 16:44:19,485 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2020-07-21 16:44:19,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:44:19,510 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2020-07-21 16:44:19,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 16:44:19,512 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2020-07-21 16:44:19,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:44:19,520 INFO L225 Difference]: With dead ends: 52 [2020-07-21 16:44:19,520 INFO L226 Difference]: Without dead ends: 25 [2020-07-21 16:44:19,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 16:44:19,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-21 16:44:19,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-21 16:44:19,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-21 16:44:19,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-07-21 16:44:19,561 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2020-07-21 16:44:19,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:44:19,562 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-07-21 16:44:19,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 16:44:19,562 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-07-21 16:44:19,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 16:44:19,563 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:44:19,564 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:44:19,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:19,777 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:44:19,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:44:19,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1687882214, now seen corresponding path program 1 times [2020-07-21 16:44:19,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:44:19,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007485815] [2020-07-21 16:44:19,780 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 16:44:19,866 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:44:19,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:44:19,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 16:44:19,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:44:19,942 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 16:44:19,942 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:44:19,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007485815] [2020-07-21 16:44:19,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:44:19,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 16:44:19,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978107905] [2020-07-21 16:44:19,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 16:44:19,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:44:19,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 16:44:19,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 16:44:19,947 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 4 states. [2020-07-21 16:44:20,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:44:20,064 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2020-07-21 16:44:20,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 16:44:20,065 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-07-21 16:44:20,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:44:20,068 INFO L225 Difference]: With dead ends: 57 [2020-07-21 16:44:20,068 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 16:44:20,069 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 [2020-07-21 16:44:20,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 16:44:20,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2020-07-21 16:44:20,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-21 16:44:20,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-07-21 16:44:20,081 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 17 [2020-07-21 16:44:20,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:44:20,081 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-07-21 16:44:20,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 16:44:20,081 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-07-21 16:44:20,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 16:44:20,082 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:44:20,083 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] [2020-07-21 16:44:20,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:20,298 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:44:20,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:44:20,299 INFO L82 PathProgramCache]: Analyzing trace with hash -825329612, now seen corresponding path program 1 times [2020-07-21 16:44:20,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:44:20,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020411523] [2020-07-21 16:44:20,300 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 16:44:20,374 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:44:20,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 16:44:20,374 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 16:44:20,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 16:44:20,402 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 16:44:20,427 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 16:44:20,428 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 16:44:20,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:20,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 04:44:20 BoogieIcfgContainer [2020-07-21 16:44:20,690 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 16:44:20,693 INFO L168 Benchmark]: Toolchain (without parser) took 2389.62 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 104.0 MB in the beginning and 98.4 MB in the end (delta: 5.7 MB). Peak memory consumption was 68.6 MB. Max. memory is 7.1 GB. [2020-07-21 16:44:20,694 INFO L168 Benchmark]: CDTParser took 0.44 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 16:44:20,695 INFO L168 Benchmark]: CACSL2BoogieTranslator took 363.26 ms. Allocated memory is still 138.9 MB. Free memory was 103.6 MB in the beginning and 93.3 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-21 16:44:20,697 INFO L168 Benchmark]: Boogie Preprocessor took 127.76 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 93.3 MB in the beginning and 179.3 MB in the end (delta: -86.0 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-21 16:44:20,701 INFO L168 Benchmark]: RCFGBuilder took 405.35 ms. Allocated memory is still 201.9 MB. Free memory was 179.3 MB in the beginning and 162.2 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. [2020-07-21 16:44:20,705 INFO L168 Benchmark]: TraceAbstraction took 1483.08 ms. Allocated memory is still 201.9 MB. Free memory was 161.5 MB in the beginning and 98.4 MB in the end (delta: 63.2 MB). Peak memory consumption was 63.2 MB. Max. memory is 7.1 GB. [2020-07-21 16:44:20,712 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 363.26 ms. Allocated memory is still 138.9 MB. Free memory was 103.6 MB in the beginning and 93.3 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 127.76 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 93.3 MB in the beginning and 179.3 MB in the end (delta: -86.0 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 405.35 ms. Allocated memory is still 201.9 MB. Free memory was 179.3 MB in the beginning and 162.2 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1483.08 ms. Allocated memory is still 201.9 MB. Free memory was 161.5 MB in the beginning and 98.4 MB in the end (delta: 63.2 MB). Peak memory consumption was 63.2 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={5855:0}, B={5857:0}, C={5856:0}, i=0, M=1] [L18] COND TRUE i