/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/modnf.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:42:03,399 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:42:03,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:42:03,445 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:42:03,446 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:42:03,450 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:42:03,454 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:42:03,463 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:42:03,467 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:42:03,474 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:42:03,475 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:42:03,477 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:42:03,478 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:42:03,481 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:42:03,484 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:42:03,486 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:42:03,488 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:42:03,492 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:42:03,500 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:42:03,509 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:42:03,511 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:42:03,513 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:42:03,515 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:42:03,518 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:42:03,539 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-23 18:42:03,539 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-23 18:42:03,540 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-23 18:42:03,542 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-23 18:42:03,543 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-23 18:42:03,544 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-23 18:42:03,545 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-23 18:42:03,546 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-23 18:42:03,548 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-23 18:42:03,549 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-23 18:42:03,550 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-23 18:42:03,550 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-23 18:42:03,551 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-23 18:42:03,551 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-23 18:42:03,552 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:42:03,553 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:42:03,554 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:42:03,555 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 [2020-10-23 18:42:03,620 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:42:03,620 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:42:03,626 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:42:03,626 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:42:03,626 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:42:03,627 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:42:03,627 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:42:03,627 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:42:03,627 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:42:03,628 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:42:03,629 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:42:03,630 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:42:03,630 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:42:03,630 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:42:03,630 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:42:03,631 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:42:03,631 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:42:03,631 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:42:03,632 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:42:03,632 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:42:03,632 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:42:03,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:42:03,633 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:42:03,633 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:42:03,634 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:42:03,634 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:42:03,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:42:03,634 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:42:03,635 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:42:03,635 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:42:04,136 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:42:04,177 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:42:04,180 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:42:04,181 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:42:04,182 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:42:04,183 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/modnf.c [2020-10-23 18:42:04,271 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdf7d72e8/2d8d5e2c823a4378a4d041622ef138f8/FLAGc5b9c82fb [2020-10-23 18:42:04,852 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:42:04,852 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/modnf.c [2020-10-23 18:42:04,860 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdf7d72e8/2d8d5e2c823a4378a4d041622ef138f8/FLAGc5b9c82fb [2020-10-23 18:42:05,207 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdf7d72e8/2d8d5e2c823a4378a4d041622ef138f8 [2020-10-23 18:42:05,211 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:42:05,217 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:42:05,220 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:42:05,221 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:42:05,225 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:42:05,226 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:42:05" (1/1) ... [2020-10-23 18:42:05,230 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26f7da53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:42:05, skipping insertion in model container [2020-10-23 18:42:05,231 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:42:05" (1/1) ... [2020-10-23 18:42:05,240 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:42:05,257 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:42:05,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:42:05,452 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:42:05,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:42:05,491 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:42:05,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:42:05 WrapperNode [2020-10-23 18:42:05,491 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:42:05,492 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:42:05,493 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:42:05,493 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:42:05,504 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:42:05" (1/1) ... [2020-10-23 18:42:05,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:42:05" (1/1) ... [2020-10-23 18:42:05,512 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:42:05" (1/1) ... [2020-10-23 18:42:05,512 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:42:05" (1/1) ... [2020-10-23 18:42:05,521 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:42:05" (1/1) ... [2020-10-23 18:42:05,527 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:42:05" (1/1) ... [2020-10-23 18:42:05,529 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:42:05" (1/1) ... [2020-10-23 18:42:05,531 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:42:05,532 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:42:05,532 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:42:05,532 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:42:05,533 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:42:05" (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 [2020-10-23 18:42:05,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:42:05,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:42:05,606 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:42:05,606 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 18:42:05,607 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 18:42:05,607 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:42:05,607 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:42:05,607 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:42:05,607 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:42:05,607 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:42:05,608 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 18:42:05,608 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 18:42:05,608 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:42:05,608 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-23 18:42:05,608 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:42:05,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-23 18:42:05,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:42:05,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:42:05,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:42:05,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:42:05,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:42:05,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:42:06,182 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:42:06,182 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-23 18:42:06,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:42:06 BoogieIcfgContainer [2020-10-23 18:42:06,184 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:42:06,186 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:42:06,186 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:42:06,190 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:42:06,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:42:05" (1/3) ... [2020-10-23 18:42:06,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19d13143 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:42:06, skipping insertion in model container [2020-10-23 18:42:06,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:42:05" (2/3) ... [2020-10-23 18:42:06,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19d13143 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:42:06, skipping insertion in model container [2020-10-23 18:42:06,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:42:06" (3/3) ... [2020-10-23 18:42:06,194 INFO L111 eAbstractionObserver]: Analyzing ICFG modnf.c [2020-10-23 18:42:06,206 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:42:06,211 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:42:06,225 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:42:06,253 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:42:06,254 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:42:06,254 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:42:06,254 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:42:06,254 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:42:06,254 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:42:06,254 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:42:06,255 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:42:06,273 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-10-23 18:42:06,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 18:42:06,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:42:06,280 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:42:06,280 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:42:06,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:42:06,287 INFO L82 PathProgramCache]: Analyzing trace with hash -391571351, now seen corresponding path program 1 times [2020-10-23 18:42:06,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:42:06,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836384017] [2020-10-23 18:42:06,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:42:06,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:42:06,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:42:06,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:42:06,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:42:06,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:42:06,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:42:06,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836384017] [2020-10-23 18:42:06,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:42:06,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 18:42:06,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795391432] [2020-10-23 18:42:06,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 18:42:06,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:42:06,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 18:42:06,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:42:06,627 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-10-23 18:42:06,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:42:06,800 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2020-10-23 18:42:06,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 18:42:06,803 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-10-23 18:42:06,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:42:06,813 INFO L225 Difference]: With dead ends: 63 [2020-10-23 18:42:06,814 INFO L226 Difference]: Without dead ends: 30 [2020-10-23 18:42:06,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:42:06,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-23 18:42:06,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-23 18:42:06,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-23 18:42:06,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-23 18:42:06,883 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 23 [2020-10-23 18:42:06,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:42:06,883 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-23 18:42:06,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 18:42:06,883 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-23 18:42:06,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 18:42:06,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:42:06,885 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:42:06,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:42:06,886 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:42:06,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:42:06,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1402688601, now seen corresponding path program 1 times [2020-10-23 18:42:06,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:42:06,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645512149] [2020-10-23 18:42:06,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:42:06,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:42:07,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:42:07,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:42:07,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:42:07,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:42:07,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:42:07,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645512149] [2020-10-23 18:42:07,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:42:07,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 18:42:07,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830571979] [2020-10-23 18:42:07,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:42:07,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:42:07,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:42:07,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:42:07,105 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 5 states. [2020-10-23 18:42:07,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:42:07,270 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2020-10-23 18:42:07,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:42:07,271 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-23 18:42:07,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:42:07,274 INFO L225 Difference]: With dead ends: 53 [2020-10-23 18:42:07,274 INFO L226 Difference]: Without dead ends: 38 [2020-10-23 18:42:07,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:42:07,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-23 18:42:07,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2020-10-23 18:42:07,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-23 18:42:07,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-23 18:42:07,289 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 23 [2020-10-23 18:42:07,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:42:07,289 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-23 18:42:07,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:42:07,289 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-23 18:42:07,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 18:42:07,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:42:07,291 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] [2020-10-23 18:42:07,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:42:07,291 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:42:07,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:42:07,292 INFO L82 PathProgramCache]: Analyzing trace with hash 385078571, now seen corresponding path program 1 times [2020-10-23 18:42:07,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:42:07,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230275647] [2020-10-23 18:42:07,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:42:07,311 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:42:07,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1009991863] [2020-10-23 18:42:07,312 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 -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 [2020-10-23 18:42:07,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:42:07,397 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:42:07,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:42:07,421 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:42:07,455 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 18:42:07,456 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 18:42:07,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-23 18:42:07,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:42:07 BoogieIcfgContainer [2020-10-23 18:42:07,714 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:42:07,717 INFO L168 Benchmark]: Toolchain (without parser) took 2503.39 ms. Allocated memory is still 151.0 MB. Free memory was 126.4 MB in the beginning and 131.0 MB in the end (delta: -4.6 MB). Peak memory consumption was 79.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:42:07,718 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory was 125.1 MB in the beginning and 125.0 MB in the end (delta: 77.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:42:07,719 INFO L168 Benchmark]: CACSL2BoogieTranslator took 271.23 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 116.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:42:07,720 INFO L168 Benchmark]: Boogie Preprocessor took 38.77 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 114.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:42:07,721 INFO L168 Benchmark]: RCFGBuilder took 652.40 ms. Allocated memory is still 151.0 MB. Free memory was 114.3 MB in the beginning and 131.1 MB in the end (delta: -16.8 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2020-10-23 18:42:07,722 INFO L168 Benchmark]: TraceAbstraction took 1528.16 ms. Allocated memory is still 151.0 MB. Free memory was 130.6 MB in the beginning and 131.0 MB in the end (delta: -433.1 kB). Peak memory consumption was 84.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:42:07,726 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory was 125.1 MB in the beginning and 125.0 MB in the end (delta: 77.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 271.23 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 116.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.77 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 114.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 652.40 ms. Allocated memory is still 151.0 MB. Free memory was 114.3 MB in the beginning and 131.1 MB in the end (delta: -16.8 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1528.16 ms. Allocated memory is still 151.0 MB. Free memory was 130.6 MB in the beginning and 131.0 MB in the end (delta: -433.1 kB). Peak memory consumption was 84.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] int N; VAL [\old(N)=14, N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) VAL [\old(N)=0, N=1] [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=1] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=1] [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=1] [L27] int i; [L28] int sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 0 [L32] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=1, sum={5:0}] [L32] COND TRUE i