/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 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/nsqmf.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 20:18:45,181 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 20:18:45,185 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 20:18:45,206 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 20:18:45,206 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 20:18:45,209 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 20:18:45,211 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 20:18:45,221 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 20:18:45,227 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 20:18:45,230 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 20:18:45,232 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 20:18:45,233 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 20:18:45,233 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 20:18:45,236 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 20:18:45,238 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 20:18:45,240 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 20:18:45,242 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 20:18:45,243 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 20:18:45,244 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 20:18:45,250 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 20:18:45,256 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 20:18:45,257 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 20:18:45,258 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 20:18:45,259 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 20:18:45,261 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 20:18:45,269 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 20:18:45,270 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 20:18:45,270 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 20:18:45,271 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 20:18:45,287 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 20:18:45,287 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 20:18:45,288 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 20:18:45,289 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 20:18:45,289 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 20:18:45,289 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 20:18:45,289 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 20:18:45,290 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 20:18:45,290 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 20:18:45,290 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 20:18:45,290 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 20:18:45,290 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 20:18:45,291 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 20:18:45,291 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 20:18:45,291 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 20:18:45,291 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 20:18:45,291 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 20:18:45,292 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 20:18:45,292 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 20:18:45,292 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 20:18:45,292 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 20:18:45,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 20:18:45,293 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 20:18:45,293 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 20:18:45,293 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 20:18:45,293 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 20:18:45,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:45,294 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 20:18:45,294 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 20:18:45,294 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 -> 2 [2020-07-21 20:18:45,591 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 20:18:45,610 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 20:18:45,616 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 20:18:45,618 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 20:18:45,621 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 20:18:45,623 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/nsqmf.c [2020-07-21 20:18:45,712 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b950751f/38bcf79571274332a9c1e15f2a8598fb/FLAG814586826 [2020-07-21 20:18:46,210 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 20:18:46,211 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/nsqmf.c [2020-07-21 20:18:46,219 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b950751f/38bcf79571274332a9c1e15f2a8598fb/FLAG814586826 [2020-07-21 20:18:46,557 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b950751f/38bcf79571274332a9c1e15f2a8598fb [2020-07-21 20:18:46,569 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 20:18:46,573 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 20:18:46,574 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 20:18:46,575 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 20:18:46,579 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 20:18:46,581 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:18:46" (1/1) ... [2020-07-21 20:18:46,585 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38a7a53d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:46, skipping insertion in model container [2020-07-21 20:18:46,585 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:18:46" (1/1) ... [2020-07-21 20:18:46,595 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 20:18:46,616 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 20:18:46,840 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:18:46,853 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 20:18:46,874 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:18:46,893 INFO L208 MainTranslator]: Completed translation [2020-07-21 20:18:46,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:46 WrapperNode [2020-07-21 20:18:46,894 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 20:18:46,895 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 20:18:46,895 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 20:18:46,895 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 20:18:47,000 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:46" (1/1) ... [2020-07-21 20:18:47,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:46" (1/1) ... [2020-07-21 20:18:47,009 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:46" (1/1) ... [2020-07-21 20:18:47,010 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:46" (1/1) ... [2020-07-21 20:18:47,018 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:46" (1/1) ... [2020-07-21 20:18:47,025 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:46" (1/1) ... [2020-07-21 20:18:47,027 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:46" (1/1) ... [2020-07-21 20:18:47,030 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 20:18:47,031 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 20:18:47,031 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 20:18:47,031 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 20:18:47,032 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:46" (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 20:18:47,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 20:18:47,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 20:18:47,118 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 20:18:47,118 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 20:18:47,118 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 20:18:47,119 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 20:18:47,120 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 20:18:47,120 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 20:18:47,120 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 20:18:47,120 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 20:18:47,121 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 20:18:47,121 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 20:18:47,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 20:18:47,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 20:18:47,122 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 20:18:47,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 20:18:47,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 20:18:47,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 20:18:47,408 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 20:18:47,409 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-21 20:18:47,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:18:47 BoogieIcfgContainer [2020-07-21 20:18:47,414 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 20:18:47,415 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 20:18:47,415 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 20:18:47,419 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 20:18:47,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:18:46" (1/3) ... [2020-07-21 20:18:47,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d6590a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:18:47, skipping insertion in model container [2020-07-21 20:18:47,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:46" (2/3) ... [2020-07-21 20:18:47,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d6590a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:18:47, skipping insertion in model container [2020-07-21 20:18:47,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:18:47" (3/3) ... [2020-07-21 20:18:47,424 INFO L109 eAbstractionObserver]: Analyzing ICFG nsqmf.c [2020-07-21 20:18:47,437 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 20:18:47,447 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 20:18:47,471 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 20:18:47,507 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 20:18:47,508 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 20:18:47,508 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 20:18:47,508 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 20:18:47,509 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 20:18:47,509 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 20:18:47,510 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 20:18:47,510 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 20:18:47,536 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-07-21 20:18:47,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 20:18:47,544 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:47,545 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] [2020-07-21 20:18:47,545 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:47,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:47,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1314760119, now seen corresponding path program 1 times [2020-07-21 20:18:47,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:47,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968203129] [2020-07-21 20:18:47,566 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 20:18:47,681 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:18:47,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:18:47,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 20:18:47,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:18:47,716 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 20:18:47,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:18:47,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968203129] [2020-07-21 20:18:47,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:18:47,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 20:18:47,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287041852] [2020-07-21 20:18:47,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 20:18:47,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:18:47,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 20:18:47,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 20:18:47,748 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 2 states. [2020-07-21 20:18:47,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:18:47,779 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2020-07-21 20:18:47,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 20:18:47,781 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2020-07-21 20:18:47,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:18:47,790 INFO L225 Difference]: With dead ends: 58 [2020-07-21 20:18:47,791 INFO L226 Difference]: Without dead ends: 29 [2020-07-21 20:18:47,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 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 20:18:47,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-21 20:18:47,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-21 20:18:47,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-21 20:18:47,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-07-21 20:18:47,841 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2020-07-21 20:18:47,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:18:47,841 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-07-21 20:18:47,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 20:18:47,842 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-07-21 20:18:47,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 20:18:47,843 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:47,843 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] [2020-07-21 20:18:48,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:48,059 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:48,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:48,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1901566133, now seen corresponding path program 1 times [2020-07-21 20:18:48,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:48,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573029913] [2020-07-21 20:18:48,061 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 20:18:48,193 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:18:48,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 20:18:48,193 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 20:18:48,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 20:18:48,241 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 20:18:48,287 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 20:18:48,288 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 20:18:48,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:48,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 08:18:48 BoogieIcfgContainer [2020-07-21 20:18:48,548 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 20:18:48,552 INFO L168 Benchmark]: Toolchain (without parser) took 1979.56 ms. Allocated memory was 138.4 MB in the beginning and 203.4 MB in the end (delta: 65.0 MB). Free memory was 103.0 MB in the beginning and 123.9 MB in the end (delta: -20.8 MB). Peak memory consumption was 44.2 MB. Max. memory is 7.1 GB. [2020-07-21 20:18:48,553 INFO L168 Benchmark]: CDTParser took 0.80 ms. Allocated memory is still 138.4 MB. Free memory is still 121.1 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 20:18:48,554 INFO L168 Benchmark]: CACSL2BoogieTranslator took 320.00 ms. Allocated memory is still 138.4 MB. Free memory was 102.6 MB in the beginning and 92.3 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-21 20:18:48,555 INFO L168 Benchmark]: Boogie Preprocessor took 135.94 ms. Allocated memory was 138.4 MB in the beginning and 203.4 MB in the end (delta: 65.0 MB). Free memory was 92.3 MB in the beginning and 181.3 MB in the end (delta: -89.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-21 20:18:48,556 INFO L168 Benchmark]: RCFGBuilder took 382.93 ms. Allocated memory is still 203.4 MB. Free memory was 181.3 MB in the beginning and 163.9 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. [2020-07-21 20:18:48,557 INFO L168 Benchmark]: TraceAbstraction took 1133.61 ms. Allocated memory is still 203.4 MB. Free memory was 162.9 MB in the beginning and 123.9 MB in the end (delta: 39.1 MB). Peak memory consumption was 39.1 MB. Max. memory is 7.1 GB. [2020-07-21 20:18:48,561 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.80 ms. Allocated memory is still 138.4 MB. Free memory is still 121.1 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 320.00 ms. Allocated memory is still 138.4 MB. Free memory was 102.6 MB in the beginning and 92.3 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 135.94 ms. Allocated memory was 138.4 MB in the beginning and 203.4 MB in the end (delta: 65.0 MB). Free memory was 92.3 MB in the beginning and 181.3 MB in the end (delta: -89.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 382.93 ms. Allocated memory is still 203.4 MB. Free memory was 181.3 MB in the beginning and 163.9 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1133.61 ms. Allocated memory is still 203.4 MB. Free memory was 162.9 MB in the beginning and 123.9 MB in the end (delta: 39.1 MB). Peak memory consumption was 39.1 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)=2, 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 *a = malloc(sizeof(long long)*N); [L27] long long *b = malloc(sizeof(long long)*N); [L29] b[0] = 1 [L30] a[0] = 1 [L32] i=1 VAL [\old(N)=0, a={-1:0}, b={-2:0}, i=1, malloc(sizeof(long long)*N)={-1:0}, malloc(sizeof(long long)*N)={-2:0}, N=1] [L32] COND FALSE !(i