/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-fpi/modpf.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 11:16:15,282 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 11:16:15,285 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 11:16:15,321 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 11:16:15,322 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 11:16:15,324 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 11:16:15,326 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 11:16:15,328 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 11:16:15,331 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 11:16:15,332 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 11:16:15,334 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 11:16:15,335 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 11:16:15,336 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 11:16:15,338 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 11:16:15,339 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 11:16:15,341 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 11:16:15,356 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 11:16:15,358 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 11:16:15,364 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 11:16:15,369 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 11:16:15,374 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 11:16:15,377 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 11:16:15,379 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 11:16:15,381 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 11:16:15,391 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 11:16:15,414 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 11:16:15,415 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 11:16:15,420 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 11:16:15,422 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 11:16:15,480 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 11:16:15,481 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 11:16:15,486 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 11:16:15,486 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 11:16:15,487 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 11:16:15,488 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 11:16:15,488 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 11:16:15,488 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 11:16:15,488 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 11:16:15,489 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 11:16:15,490 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 11:16:15,490 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 11:16:15,491 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 11:16:15,491 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 11:16:15,491 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 11:16:15,491 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 11:16:15,492 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 11:16:15,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 11:16:15,492 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 11:16:15,492 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 11:16:15,492 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 11:16:15,493 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 11:16:15,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 11:16:15,493 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 11:16:15,493 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 11:16:15,494 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 11:16:15,979 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 11:16:16,010 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 11:16:16,013 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 11:16:16,015 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 11:16:16,021 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 11:16:16,022 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/modpf.c [2021-01-06 11:16:16,125 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/56fe22b16/d6a422fcbe3b480cb8a1ca4e2b97a59b/FLAG3928959c5 [2021-01-06 11:16:16,885 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 11:16:16,886 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-fpi/modpf.c [2021-01-06 11:16:16,894 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/56fe22b16/d6a422fcbe3b480cb8a1ca4e2b97a59b/FLAG3928959c5 [2021-01-06 11:16:17,258 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/56fe22b16/d6a422fcbe3b480cb8a1ca4e2b97a59b [2021-01-06 11:16:17,263 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 11:16:17,268 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 11:16:17,274 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 11:16:17,275 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 11:16:17,279 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 11:16:17,281 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 11:16:17" (1/1) ... [2021-01-06 11:16:17,284 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6be20b1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:16:17, skipping insertion in model container [2021-01-06 11:16:17,284 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 11:16:17" (1/1) ... [2021-01-06 11:16:17,293 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 11:16:17,311 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 11:16:17,474 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-fpi/modpf.c[588,601] left hand side expression in assignment: lhs: VariableLHS[~N~0,GLOBAL] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~sum~0,],[IntegerLiteral[0]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~sum~0,],[IntegerLiteral[0]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 11:16:17,504 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 11:16:17,514 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 11:16:17,534 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-fpi/modpf.c[588,601] left hand side expression in assignment: lhs: VariableLHS[~N~0,GLOBAL] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#sum~0,],base],StructAccessExpression[IdentifierExpression[~#sum~0,],offset]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#sum~0,],base],StructAccessExpression[IdentifierExpression[~#sum~0,],offset]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 11:16:17,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 11:16:17,593 INFO L208 MainTranslator]: Completed translation [2021-01-06 11:16:17,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:16:17 WrapperNode [2021-01-06 11:16:17,594 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 11:16:17,596 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 11:16:17,597 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 11:16:17,597 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 11:16:17,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:16:17" (1/1) ... [2021-01-06 11:16:17,632 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:16:17" (1/1) ... [2021-01-06 11:16:17,673 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 11:16:17,677 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 11:16:17,678 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 11:16:17,678 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 11:16:17,691 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:16:17" (1/1) ... [2021-01-06 11:16:17,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:16:17" (1/1) ... [2021-01-06 11:16:17,698 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:16:17" (1/1) ... [2021-01-06 11:16:17,699 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:16:17" (1/1) ... [2021-01-06 11:16:17,724 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:16:17" (1/1) ... [2021-01-06 11:16:17,732 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:16:17" (1/1) ... [2021-01-06 11:16:17,739 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:16:17" (1/1) ... [2021-01-06 11:16:17,746 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 11:16:17,752 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 11:16:17,752 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 11:16:17,753 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 11:16:17,754 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:16:17" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 11:16:17,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 11:16:17,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 11:16:17,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 11:16:17,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-01-06 11:16:17,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 11:16:17,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 11:16:17,885 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 11:16:17,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 11:16:18,289 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 11:16:18,289 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-01-06 11:16:18,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:16:18 BoogieIcfgContainer [2021-01-06 11:16:18,291 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 11:16:18,298 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 11:16:18,298 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 11:16:18,302 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 11:16:18,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 11:16:17" (1/3) ... [2021-01-06 11:16:18,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c0fe11b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 11:16:18, skipping insertion in model container [2021-01-06 11:16:18,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:16:17" (2/3) ... [2021-01-06 11:16:18,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c0fe11b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 11:16:18, skipping insertion in model container [2021-01-06 11:16:18,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:16:18" (3/3) ... [2021-01-06 11:16:18,306 INFO L111 eAbstractionObserver]: Analyzing ICFG modpf.c [2021-01-06 11:16:18,313 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 11:16:18,317 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 11:16:18,339 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 11:16:18,371 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 11:16:18,371 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 11:16:18,371 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 11:16:18,372 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 11:16:18,372 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 11:16:18,372 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 11:16:18,372 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 11:16:18,372 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 11:16:18,390 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2021-01-06 11:16:18,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 11:16:18,396 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:16:18,397 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:16:18,397 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:16:18,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:16:18,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2021-01-06 11:16:18,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:16:18,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435155023] [2021-01-06 11:16:18,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:16:18,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:16:18,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:16:18,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435155023] [2021-01-06 11:16:18,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:16:18,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 11:16:18,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259686721] [2021-01-06 11:16:18,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 11:16:18,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:16:18,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 11:16:18,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 11:16:18,631 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2021-01-06 11:16:18,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:16:18,649 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-01-06 11:16:18,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 11:16:18,651 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2021-01-06 11:16:18,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:16:18,660 INFO L225 Difference]: With dead ends: 38 [2021-01-06 11:16:18,660 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 11:16:18,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 11:16:18,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 11:16:18,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-01-06 11:16:18,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 11:16:18,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-01-06 11:16:18,703 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-01-06 11:16:18,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:16:18,704 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-01-06 11:16:18,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 11:16:18,704 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-01-06 11:16:18,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 11:16:18,705 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:16:18,705 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:16:18,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 11:16:18,706 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:16:18,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:16:18,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2021-01-06 11:16:18,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:16:18,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874887840] [2021-01-06 11:16:18,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:16:18,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:16:18,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:16:18,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874887840] [2021-01-06 11:16:18,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:16:18,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 11:16:18,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919807070] [2021-01-06 11:16:18,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 11:16:18,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:16:18,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 11:16:18,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 11:16:18,817 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 4 states. [2021-01-06 11:16:18,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:16:18,957 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-01-06 11:16:18,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 11:16:18,960 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2021-01-06 11:16:18,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:16:18,962 INFO L225 Difference]: With dead ends: 37 [2021-01-06 11:16:18,963 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 11:16:18,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 11:16:18,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 11:16:18,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2021-01-06 11:16:18,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 11:16:18,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-01-06 11:16:18,977 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-01-06 11:16:18,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:16:18,979 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-01-06 11:16:18,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 11:16:18,979 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-01-06 11:16:18,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 11:16:18,980 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:16:18,981 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:16:18,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 11:16:18,983 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:16:18,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:16:18,986 INFO L82 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2021-01-06 11:16:18,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:16:18,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893768293] [2021-01-06 11:16:18,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:16:19,059 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 11:16:19,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [638233079] [2021-01-06 11:16:19,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:16:19,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 11:16:19,129 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 11:16:19,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 11:16:19,151 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 11:16:19,202 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-06 11:16:19,202 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 11:16:19,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 11:16:19,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 11:16:19 BoogieIcfgContainer [2021-01-06 11:16:19,484 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 11:16:19,485 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 11:16:19,486 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 11:16:19,490 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 11:16:19,490 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:16:18" (3/4) ... [2021-01-06 11:16:19,493 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-01-06 11:16:19,564 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/array-fpi/modpf.c-witness.graphml [2021-01-06 11:16:19,564 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 11:16:19,566 INFO L168 Benchmark]: Toolchain (without parser) took 2299.46 ms. Allocated memory is still 153.1 MB. Free memory was 128.8 MB in the beginning and 86.3 MB in the end (delta: 42.5 MB). Peak memory consumption was 41.9 MB. Max. memory is 8.0 GB. [2021-01-06 11:16:19,567 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 153.1 MB. Free memory is still 125.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 11:16:19,568 INFO L168 Benchmark]: CACSL2BoogieTranslator took 321.18 ms. Allocated memory is still 153.1 MB. Free memory was 128.4 MB in the beginning and 118.0 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 11:16:19,568 INFO L168 Benchmark]: Boogie Procedure Inliner took 79.17 ms. Allocated memory is still 153.1 MB. Free memory was 117.9 MB in the beginning and 116.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 11:16:19,569 INFO L168 Benchmark]: Boogie Preprocessor took 71.74 ms. Allocated memory is still 153.1 MB. Free memory was 116.3 MB in the beginning and 115.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 11:16:19,570 INFO L168 Benchmark]: RCFGBuilder took 539.57 ms. Allocated memory is still 153.1 MB. Free memory was 115.1 MB in the beginning and 132.5 MB in the end (delta: -17.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-01-06 11:16:19,571 INFO L168 Benchmark]: TraceAbstraction took 1186.19 ms. Allocated memory is still 153.1 MB. Free memory was 131.9 MB in the beginning and 88.9 MB in the end (delta: 43.0 MB). Peak memory consumption was 43.0 MB. Max. memory is 8.0 GB. [2021-01-06 11:16:19,571 INFO L168 Benchmark]: Witness Printer took 79.46 ms. Allocated memory is still 153.1 MB. Free memory was 88.9 MB in the beginning and 86.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 11:16:19,576 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 153.1 MB. Free memory is still 125.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 321.18 ms. Allocated memory is still 153.1 MB. Free memory was 128.4 MB in the beginning and 118.0 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 79.17 ms. Allocated memory is still 153.1 MB. Free memory was 117.9 MB in the beginning and 116.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 71.74 ms. Allocated memory is still 153.1 MB. Free memory was 116.3 MB in the beginning and 115.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 539.57 ms. Allocated memory is still 153.1 MB. Free memory was 115.1 MB in the beginning and 132.5 MB in the end (delta: -17.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1186.19 ms. Allocated memory is still 153.1 MB. Free memory was 131.9 MB in the beginning and 88.9 MB in the end (delta: 43.0 MB). Peak memory consumption was 43.0 MB. Max. memory is 8.0 GB. * Witness Printer took 79.46 ms. Allocated memory is still 153.1 MB. Free memory was 88.9 MB in the beginning and 86.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) VAL [N=1] [L27] int i; [L28] int sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 0 [L32] i=0 VAL [N=1] [L32] COND TRUE i