/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 NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/modsf.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:38:25,170 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:38:25,173 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:38:25,194 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:38:25,194 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:38:25,197 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:38:25,199 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:38:25,210 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:38:25,216 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:38:25,218 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:38:25,220 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:38:25,222 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:38:25,222 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:38:25,225 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:38:25,228 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:38:25,229 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:38:25,231 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:38:25,232 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:38:25,234 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:38:25,240 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:38:25,245 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:38:25,249 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:38:25,251 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:38:25,252 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:38:25,254 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 11:38:25,254 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 11:38:25,255 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 11:38:25,257 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 11:38:25,258 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 11:38:25,260 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-07-21 11:38:25,266 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:38:25,267 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:38:25,269 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:38:25,270 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 11:38:25,306 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:38:25,307 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:38:25,308 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:38:25,308 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:38:25,308 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:38:25,309 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:38:25,309 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:38:25,309 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:38:25,312 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:38:25,313 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:38:25,313 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:38:25,313 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:38:25,313 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:38:25,313 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:38:25,314 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:38:25,314 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:38:25,314 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:38:25,314 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:38:25,314 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:38:25,315 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:38:25,315 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:38:25,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:38:25,316 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:38:25,316 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:38:25,316 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:38:25,317 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:38:25,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:38:25,317 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:38:25,317 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:38:25,318 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 -> NOT_INCREMENTALLY [2020-07-21 11:38:25,649 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:38:25,674 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:38:25,678 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:38:25,680 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:38:25,680 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:38:25,681 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/modsf.c [2020-07-21 11:38:25,750 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/241aea505/8e027162f14744b8be66c4497887f5aa/FLAGcaadc86ea [2020-07-21 11:38:26,228 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:38:26,228 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/modsf.c [2020-07-21 11:38:26,236 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/241aea505/8e027162f14744b8be66c4497887f5aa/FLAGcaadc86ea [2020-07-21 11:38:26,599 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/241aea505/8e027162f14744b8be66c4497887f5aa [2020-07-21 11:38:26,610 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:38:26,613 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:38:26,614 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:38:26,614 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:38:26,618 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:38:26,619 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:38:26" (1/1) ... [2020-07-21 11:38:26,623 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f83bbba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:38:26, skipping insertion in model container [2020-07-21 11:38:26,623 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:38:26" (1/1) ... [2020-07-21 11:38:26,631 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:38:26,651 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:38:26,852 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:38:26,863 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:38:26,888 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:38:26,988 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:38:26,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:38:26 WrapperNode [2020-07-21 11:38:26,988 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:38:26,989 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:38:26,989 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:38:26,989 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:38:27,000 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:38:26" (1/1) ... [2020-07-21 11:38:27,000 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:38:26" (1/1) ... [2020-07-21 11:38:27,010 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:38:26" (1/1) ... [2020-07-21 11:38:27,010 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:38:26" (1/1) ... [2020-07-21 11:38:27,020 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:38:26" (1/1) ... [2020-07-21 11:38:27,027 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:38:26" (1/1) ... [2020-07-21 11:38:27,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:38:26" (1/1) ... [2020-07-21 11:38:27,033 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:38:27,033 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:38:27,033 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:38:27,034 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:38:27,040 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:38:26" (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 11:38:27,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:38:27,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:38:27,108 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 11:38:27,108 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 11:38:27,108 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:38:27,108 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:38:27,109 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 11:38:27,109 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 11:38:27,109 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 11:38:27,109 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 11:38:27,109 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 11:38:27,109 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:38:27,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 11:38:27,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 11:38:27,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 11:38:27,110 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 11:38:27,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 11:38:27,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:38:27,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:38:27,434 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:38:27,435 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-07-21 11:38:27,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:38:27 BoogieIcfgContainer [2020-07-21 11:38:27,441 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:38:27,443 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:38:27,443 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:38:27,447 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:38:27,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:38:26" (1/3) ... [2020-07-21 11:38:27,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34500b4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:38:27, skipping insertion in model container [2020-07-21 11:38:27,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:38:26" (2/3) ... [2020-07-21 11:38:27,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34500b4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:38:27, skipping insertion in model container [2020-07-21 11:38:27,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:38:27" (3/3) ... [2020-07-21 11:38:27,451 INFO L109 eAbstractionObserver]: Analyzing ICFG modsf.c [2020-07-21 11:38:27,463 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:38:27,472 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:38:27,491 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:38:27,525 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:38:27,525 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:38:27,525 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:38:27,525 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:38:27,526 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:38:27,526 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:38:27,526 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:38:27,526 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:38:27,548 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-07-21 11:38:27,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 11:38:27,556 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:38:27,558 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] [2020-07-21 11:38:27,559 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:38:27,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:38:27,566 INFO L82 PathProgramCache]: Analyzing trace with hash -173101897, now seen corresponding path program 1 times [2020-07-21 11:38:27,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:38:27,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694486804] [2020-07-21 11:38:27,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:38:27,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:38:27,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 11:38:27,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:38:27,725 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 11:38:27,725 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:38:27,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694486804] [2020-07-21 11:38:27,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:38:27,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 11:38:27,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623835017] [2020-07-21 11:38:27,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 11:38:27,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:38:27,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 11:38:27,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 11:38:27,753 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2020-07-21 11:38:27,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:38:27,780 INFO L93 Difference]: Finished difference Result 70 states and 93 transitions. [2020-07-21 11:38:27,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 11:38:27,782 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 26 [2020-07-21 11:38:27,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:38:27,790 INFO L225 Difference]: With dead ends: 70 [2020-07-21 11:38:27,790 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 11:38:27,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 25 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 11:38:27,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 11:38:27,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-07-21 11:38:27,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 11:38:27,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-07-21 11:38:27,835 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 26 [2020-07-21 11:38:27,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:38:27,835 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-07-21 11:38:27,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 11:38:27,836 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-07-21 11:38:27,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 11:38:27,837 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:38:27,837 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] [2020-07-21 11:38:28,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:38:28,046 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:38:28,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:38:28,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1503462707, now seen corresponding path program 1 times [2020-07-21 11:38:28,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:38:28,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1193351270] [2020-07-21 11:38:28,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:38:28,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:38:28,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:38:28,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:38:28,194 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 11:38:28,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:38:28,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1193351270] [2020-07-21 11:38:28,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:38:28,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 11:38:28,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507127538] [2020-07-21 11:38:28,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 11:38:28,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:38:28,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 11:38:28,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 11:38:28,203 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 4 states. [2020-07-21 11:38:28,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:38:28,345 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2020-07-21 11:38:28,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 11:38:28,346 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-07-21 11:38:28,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:38:28,349 INFO L225 Difference]: With dead ends: 67 [2020-07-21 11:38:28,349 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 11:38:28,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 23 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 11:38:28,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 11:38:28,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2020-07-21 11:38:28,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-21 11:38:28,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-07-21 11:38:28,365 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 26 [2020-07-21 11:38:28,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:38:28,366 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-07-21 11:38:28,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 11:38:28,366 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-07-21 11:38:28,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-21 11:38:28,367 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:38:28,367 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, 1, 1, 1] [2020-07-21 11:38:28,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:38:28,583 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:38:28,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:38:28,584 INFO L82 PathProgramCache]: Analyzing trace with hash -260192085, now seen corresponding path program 1 times [2020-07-21 11:38:28,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:38:28,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137855565] [2020-07-21 11:38:28,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:38:28,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:38:28,664 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:38:28,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:38:28,689 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:38:28,718 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 11:38:28,718 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 11:38:28,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:38:28,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:38:28 BoogieIcfgContainer [2020-07-21 11:38:28,982 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 11:38:28,985 INFO L168 Benchmark]: Toolchain (without parser) took 2372.44 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 101.9 MB in the beginning and 95.3 MB in the end (delta: 6.6 MB). Peak memory consumption was 70.6 MB. Max. memory is 7.1 GB. [2020-07-21 11:38:28,986 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 11:38:28,987 INFO L168 Benchmark]: CACSL2BoogieTranslator took 374.51 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 101.4 MB in the beginning and 180.4 MB in the end (delta: -79.0 MB). Peak memory consumption was 23.2 MB. Max. memory is 7.1 GB. [2020-07-21 11:38:28,988 INFO L168 Benchmark]: Boogie Preprocessor took 44.07 ms. Allocated memory is still 201.9 MB. Free memory was 180.4 MB in the beginning and 178.0 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-07-21 11:38:28,989 INFO L168 Benchmark]: RCFGBuilder took 408.20 ms. Allocated memory is still 201.9 MB. Free memory was 178.0 MB in the beginning and 159.4 MB in the end (delta: 18.6 MB). Peak memory consumption was 18.6 MB. Max. memory is 7.1 GB. [2020-07-21 11:38:28,990 INFO L168 Benchmark]: TraceAbstraction took 1538.70 ms. Allocated memory is still 201.9 MB. Free memory was 158.7 MB in the beginning and 95.3 MB in the end (delta: 63.5 MB). Peak memory consumption was 63.5 MB. Max. memory is 7.1 GB. [2020-07-21 11:38:28,995 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 374.51 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 101.4 MB in the beginning and 180.4 MB in the end (delta: -79.0 MB). Peak memory consumption was 23.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 44.07 ms. Allocated memory is still 201.9 MB. Free memory was 180.4 MB in the beginning and 178.0 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 408.20 ms. Allocated memory is still 201.9 MB. Free memory was 178.0 MB in the beginning and 159.4 MB in the end (delta: 18.6 MB). Peak memory consumption was 18.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1538.70 ms. Allocated memory is still 201.9 MB. Free memory was 158.7 MB in the beginning and 95.3 MB in the end (delta: 63.5 MB). Peak memory consumption was 63.5 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)=6, 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] long long *a = malloc(sizeof(long long)*N); [L29] sum[0] = 0 [L30] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(long long)*N)={-1:0}, N=1, sum={2:0}] [L30] COND TRUE i