/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 BIGGEST_EQUIVALENCE_CLASS --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/array-fpi/condgf.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 01:38:11,189 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 01:38:11,193 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 01:38:11,214 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 01:38:11,214 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 01:38:11,216 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 01:38:11,218 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 01:38:11,229 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 01:38:11,233 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 01:38:11,236 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 01:38:11,237 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 01:38:11,238 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 01:38:11,239 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 01:38:11,240 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 01:38:11,243 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 01:38:11,244 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 01:38:11,246 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 01:38:11,246 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 01:38:11,248 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 01:38:11,253 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 01:38:11,254 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 01:38:11,255 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 01:38:11,256 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 01:38:11,257 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 01:38:11,259 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 01:38:11,266 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 01:38:11,267 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 01:38:11,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 01:38:11,268 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 01:38:11,282 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 01:38:11,283 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 01:38:11,284 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 01:38:11,284 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 01:38:11,284 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 01:38:11,284 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 01:38:11,285 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 01:38:11,285 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 01:38:11,285 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 01:38:11,285 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 01:38:11,285 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 01:38:11,286 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 01:38:11,286 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 01:38:11,286 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 01:38:11,286 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 01:38:11,286 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 01:38:11,286 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 01:38:11,287 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 01:38:11,287 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 01:38:11,287 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 01:38:11,287 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 01:38:11,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:38:11,288 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 01:38:11,288 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 01:38:11,288 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 01:38:11,288 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 01:38:11,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:38:11,289 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 01:38:11,289 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 01:38:11,289 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 -> BIGGEST_EQUIVALENCE_CLASS 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 [2020-07-21 01:38:11,565 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 01:38:11,581 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 01:38:11,585 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 01:38:11,587 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 01:38:11,588 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 01:38:11,590 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/condgf.c [2020-07-21 01:38:11,668 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/663dc134b/7188dc8406704e3e85be8edb4bb96b14/FLAG80b6f1620 [2020-07-21 01:38:12,126 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 01:38:12,127 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/condgf.c [2020-07-21 01:38:12,135 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/663dc134b/7188dc8406704e3e85be8edb4bb96b14/FLAG80b6f1620 [2020-07-21 01:38:12,494 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/663dc134b/7188dc8406704e3e85be8edb4bb96b14 [2020-07-21 01:38:12,508 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 01:38:12,511 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 01:38:12,516 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 01:38:12,516 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 01:38:12,520 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 01:38:12,521 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:38:12" (1/1) ... [2020-07-21 01:38:12,526 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61ea1b54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:12, skipping insertion in model container [2020-07-21 01:38:12,526 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:38:12" (1/1) ... [2020-07-21 01:38:12,535 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 01:38:12,555 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:38:12,775 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:38:12,783 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:38:12,808 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:38:12,829 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:38:12,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:12 WrapperNode [2020-07-21 01:38:12,830 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:38:12,831 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:38:12,831 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:38:12,831 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:38:12,932 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:12" (1/1) ... [2020-07-21 01:38:12,933 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:12" (1/1) ... [2020-07-21 01:38:12,941 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:12" (1/1) ... [2020-07-21 01:38:12,942 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:12" (1/1) ... [2020-07-21 01:38:12,952 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:12" (1/1) ... [2020-07-21 01:38:12,958 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:12" (1/1) ... [2020-07-21 01:38:12,960 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:12" (1/1) ... [2020-07-21 01:38:12,963 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:38:12,964 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:38:12,964 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:38:12,964 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:38:12,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:12" (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 01:38:13,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:38:13,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:38:13,032 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 01:38:13,032 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 01:38:13,033 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:38:13,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:38:13,035 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 01:38:13,035 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 01:38:13,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 01:38:13,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 01:38:13,036 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 01:38:13,036 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:38:13,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 01:38:13,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 01:38:13,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 01:38:13,037 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 01:38:13,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 01:38:13,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:38:13,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:38:13,323 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:38:13,324 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-21 01:38:13,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:38:13 BoogieIcfgContainer [2020-07-21 01:38:13,330 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:38:13,333 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:38:13,333 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:38:13,338 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:38:13,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:38:12" (1/3) ... [2020-07-21 01:38:13,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d2af5b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:38:13, skipping insertion in model container [2020-07-21 01:38:13,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:12" (2/3) ... [2020-07-21 01:38:13,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d2af5b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:38:13, skipping insertion in model container [2020-07-21 01:38:13,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:38:13" (3/3) ... [2020-07-21 01:38:13,343 INFO L109 eAbstractionObserver]: Analyzing ICFG condgf.c [2020-07-21 01:38:13,361 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:38:13,371 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 01:38:13,392 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 01:38:13,420 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:38:13,421 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:38:13,421 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:38:13,421 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:38:13,421 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:38:13,421 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:38:13,421 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:38:13,421 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:38:13,446 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-07-21 01:38:13,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 01:38:13,453 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:38:13,454 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:38:13,454 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:38:13,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:38:13,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1314310818, now seen corresponding path program 1 times [2020-07-21 01:38:13,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:38:13,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945033129] [2020-07-21 01:38:13,475 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 [2020-07-21 01:38:13,568 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 01:38:13,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:38:13,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 01:38:13,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:38:13,599 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 01:38:13,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:38:13,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945033129] [2020-07-21 01:38:13,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:38:13,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 01:38:13,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610615088] [2020-07-21 01:38:13,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 01:38:13,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:38:13,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 01:38:13,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 01:38:13,624 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 2 states. [2020-07-21 01:38:13,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:38:13,648 INFO L93 Difference]: Finished difference Result 66 states and 87 transitions. [2020-07-21 01:38:13,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 01:38:13,650 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 24 [2020-07-21 01:38:13,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:38:13,658 INFO L225 Difference]: With dead ends: 66 [2020-07-21 01:38:13,658 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 01:38:13,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 23 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 01:38:13,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 01:38:13,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-21 01:38:13,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 01:38:13,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-07-21 01:38:13,702 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 24 [2020-07-21 01:38:13,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:38:13,702 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-07-21 01:38:13,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 01:38:13,703 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-07-21 01:38:13,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 01:38:13,704 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:38:13,704 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:38:13,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:38:13,919 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:38:13,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:38:13,920 INFO L82 PathProgramCache]: Analyzing trace with hash 34447140, now seen corresponding path program 1 times [2020-07-21 01:38:13,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:38:13,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491391310] [2020-07-21 01:38:13,922 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 [2020-07-21 01:38:14,006 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:38:14,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:38:14,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:38:14,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:38:14,093 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 01:38:14,093 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:38:14,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491391310] [2020-07-21 01:38:14,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:38:14,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 01:38:14,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490055833] [2020-07-21 01:38:14,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 01:38:14,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:38:14,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 01:38:14,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 01:38:14,101 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 4 states. [2020-07-21 01:38:14,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:38:14,254 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2020-07-21 01:38:14,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 01:38:14,255 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-07-21 01:38:14,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:38:14,258 INFO L225 Difference]: With dead ends: 62 [2020-07-21 01:38:14,259 INFO L226 Difference]: Without dead ends: 44 [2020-07-21 01:38:14,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 01:38:14,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-21 01:38:14,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2020-07-21 01:38:14,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 01:38:14,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-07-21 01:38:14,279 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 24 [2020-07-21 01:38:14,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:38:14,279 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-07-21 01:38:14,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 01:38:14,280 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-07-21 01:38:14,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 01:38:14,281 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:38:14,281 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:38:14,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:38:14,497 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:38:14,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:38:14,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1408881596, now seen corresponding path program 1 times [2020-07-21 01:38:14,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:38:14,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134216127] [2020-07-21 01:38:14,499 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 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 01:38:14,562 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:38:14,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:38:14,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 01:38:14,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:38:14,631 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-21 01:38:14,632 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:38:14,643 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:38:14,644 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:38:14,644 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2020-07-21 01:38:14,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 01:38:14,691 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-07-21 01:38:14,692 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:38:14,706 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:38:14,707 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:38:14,708 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:27 [2020-07-21 01:38:14,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 01:38:14,833 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2020-07-21 01:38:14,835 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:38:14,850 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:38:14,852 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-21 01:38:14,853 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:23 [2020-07-21 01:38:14,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 01:38:14,901 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2020-07-21 01:38:14,903 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:38:14,910 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:38:14,912 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:38:14,912 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:30, output treesize:7 [2020-07-21 01:38:14,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:38:14,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:38:15,623 WARN L838 $PredicateComparison]: unable to prove that (forall ((main_~a~0.offset Int)) (< (+ c_main_~i~0 1) (let ((.cse0 (store (select |c_#memory_int| c_main_~a~0.base) (+ (* c_main_~i~0 4) main_~a~0.offset) 2))) (+ (select .cse0 main_~a~0.offset) (select (select (store |c_#memory_int| c_main_~a~0.base .cse0) |c_main_~#sum~0.base|) |c_main_~#sum~0.offset|))))) is different from false [2020-07-21 01:38:15,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2020-07-21 01:38:15,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134216127] [2020-07-21 01:38:15,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:38:15,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-07-21 01:38:15,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517828227] [2020-07-21 01:38:15,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 01:38:15,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:38:15,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 01:38:15,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=167, Unknown=1, NotChecked=26, Total=240 [2020-07-21 01:38:15,650 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 16 states. [2020-07-21 01:38:16,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:38:16,332 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2020-07-21 01:38:16,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 01:38:16,334 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2020-07-21 01:38:16,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:38:16,336 INFO L225 Difference]: With dead ends: 73 [2020-07-21 01:38:16,337 INFO L226 Difference]: Without dead ends: 59 [2020-07-21 01:38:16,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=135, Invalid=468, Unknown=1, NotChecked=46, Total=650 [2020-07-21 01:38:16,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-21 01:38:16,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2020-07-21 01:38:16,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-21 01:38:16,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-07-21 01:38:16,367 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 31 [2020-07-21 01:38:16,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:38:16,368 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-07-21 01:38:16,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 01:38:16,368 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-07-21 01:38:16,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 01:38:16,373 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:38:16,373 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:38:16,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:38:16,589 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:38:16,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:38:16,590 INFO L82 PathProgramCache]: Analyzing trace with hash -728823226, now seen corresponding path program 1 times [2020-07-21 01:38:16,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:38:16,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819546078] [2020-07-21 01:38:16,591 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 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:38:16,648 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:38:16,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 01:38:16,649 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 01:38:16,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 01:38:16,668 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 01:38:16,694 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 01:38:16,695 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 01:38:16,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:38:16,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:38:16 BoogieIcfgContainer [2020-07-21 01:38:16,966 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 01:38:16,969 INFO L168 Benchmark]: Toolchain (without parser) took 4458.63 ms. Allocated memory was 137.4 MB in the beginning and 232.8 MB in the end (delta: 95.4 MB). Free memory was 100.8 MB in the beginning and 92.1 MB in the end (delta: 8.6 MB). Peak memory consumption was 104.1 MB. Max. memory is 7.1 GB. [2020-07-21 01:38:16,970 INFO L168 Benchmark]: CDTParser took 0.73 ms. Allocated memory is still 137.4 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 01:38:16,971 INFO L168 Benchmark]: CACSL2BoogieTranslator took 314.79 ms. Allocated memory is still 137.4 MB. Free memory was 100.4 MB in the beginning and 89.8 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-07-21 01:38:16,972 INFO L168 Benchmark]: Boogie Preprocessor took 132.76 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 89.8 MB in the beginning and 178.5 MB in the end (delta: -88.7 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-21 01:38:16,973 INFO L168 Benchmark]: RCFGBuilder took 365.86 ms. Allocated memory is still 201.9 MB. Free memory was 178.5 MB in the beginning and 160.4 MB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 7.1 GB. [2020-07-21 01:38:16,974 INFO L168 Benchmark]: TraceAbstraction took 3633.44 ms. Allocated memory was 201.9 MB in the beginning and 232.8 MB in the end (delta: 30.9 MB). Free memory was 159.7 MB in the beginning and 92.1 MB in the end (delta: 67.6 MB). Peak memory consumption was 98.5 MB. Max. memory is 7.1 GB. [2020-07-21 01:38:16,978 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.73 ms. Allocated memory is still 137.4 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 314.79 ms. Allocated memory is still 137.4 MB. Free memory was 100.4 MB in the beginning and 89.8 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 132.76 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 89.8 MB in the beginning and 178.5 MB in the end (delta: -88.7 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 365.86 ms. Allocated memory is still 201.9 MB. Free memory was 178.5 MB in the beginning and 160.4 MB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3633.44 ms. Allocated memory was 201.9 MB in the beginning and 232.8 MB in the end (delta: 30.9 MB). Free memory was 159.7 MB in the beginning and 92.1 MB in the end (delta: 67.6 MB). Peak memory consumption was 98.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; VAL [\old(N)=7, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=1] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=1] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=1] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=1] [L25] int i; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] sum[0] = 0 [L30] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=1, sum={11799:0}] [L30] COND TRUE i