/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/ss4f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:47:38,856 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:47:38,859 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:47:38,876 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:47:38,876 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:47:38,878 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:47:38,880 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:47:38,889 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:47:38,893 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:47:38,896 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:47:38,898 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:47:38,900 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:47:38,900 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:47:38,902 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:47:38,904 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:47:38,905 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:47:38,907 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:47:38,907 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:47:38,909 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:47:38,914 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:47:38,919 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:47:38,921 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:47:38,922 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:47:38,923 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:47:38,926 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 11:47:38,927 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 11:47:38,927 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 11:47:38,929 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 11:47:38,930 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 11:47:38,931 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 11:47:38,932 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 11:47:38,933 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 11:47:38,934 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 11:47:38,934 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 11:47:38,936 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 11:47:38,936 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 11:47:38,937 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 11:47:38,937 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 11:47:38,937 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:47:38,938 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:47:38,939 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:47:38,940 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 [2020-07-20 11:47:38,967 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:47:38,968 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:47:38,970 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:47:38,971 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:47:38,971 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:47:38,971 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:47:38,972 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:47:38,972 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:47:38,972 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:47:38,972 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:47:38,973 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:47:38,973 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:47:38,973 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:47:38,974 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:47:38,974 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:47:38,974 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:47:38,974 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:47:38,975 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:47:38,975 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:47:38,975 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:47:38,975 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:47:38,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:47:38,976 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:47:38,977 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:47:38,977 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:47:38,977 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:47:38,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:38,978 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:47:38,978 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:47:38,978 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 [2020-07-20 11:47:39,272 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:47:39,285 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:47:39,289 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:47:39,290 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:47:39,291 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:47:39,291 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ss4f.c [2020-07-20 11:47:39,363 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07d8f0a34/db74bc8b6ace411a91d29ab9fbd8ef92/FLAG0e2436f2e [2020-07-20 11:47:39,779 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:47:39,780 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ss4f.c [2020-07-20 11:47:39,785 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07d8f0a34/db74bc8b6ace411a91d29ab9fbd8ef92/FLAG0e2436f2e [2020-07-20 11:47:40,205 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07d8f0a34/db74bc8b6ace411a91d29ab9fbd8ef92 [2020-07-20 11:47:40,216 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:47:40,219 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:47:40,220 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:47:40,220 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:47:40,224 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:47:40,225 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:47:40" (1/1) ... [2020-07-20 11:47:40,227 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f864992 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:40, skipping insertion in model container [2020-07-20 11:47:40,228 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:47:40" (1/1) ... [2020-07-20 11:47:40,235 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:47:40,254 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:47:40,440 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:47:40,449 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:47:40,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:47:40,489 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:47:40,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:40 WrapperNode [2020-07-20 11:47:40,489 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:47:40,490 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:47:40,490 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:47:40,490 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:47:40,582 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:40" (1/1) ... [2020-07-20 11:47:40,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:40" (1/1) ... [2020-07-20 11:47:40,590 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:40" (1/1) ... [2020-07-20 11:47:40,591 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:40" (1/1) ... [2020-07-20 11:47:40,600 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:40" (1/1) ... [2020-07-20 11:47:40,606 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:40" (1/1) ... [2020-07-20 11:47:40,608 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:40" (1/1) ... [2020-07-20 11:47:40,610 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:47:40,611 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:47:40,611 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:47:40,611 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:47:40,612 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:40" (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 [2020-07-20 11:47:40,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:47:40,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:47:40,686 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 11:47:40,686 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 11:47:40,686 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:47:40,686 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:47:40,686 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 11:47:40,686 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 11:47:40,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 11:47:40,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:47:40,687 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 11:47:40,687 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:47:40,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 11:47:40,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 11:47:40,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 11:47:40,688 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 11:47:40,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 11:47:40,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:47:40,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:47:41,003 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:47:41,004 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-20 11:47:41,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:47:41 BoogieIcfgContainer [2020-07-20 11:47:41,010 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:47:41,011 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:47:41,011 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:47:41,014 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:47:41,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:47:40" (1/3) ... [2020-07-20 11:47:41,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@104a17cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:47:41, skipping insertion in model container [2020-07-20 11:47:41,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:40" (2/3) ... [2020-07-20 11:47:41,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@104a17cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:47:41, skipping insertion in model container [2020-07-20 11:47:41,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:47:41" (3/3) ... [2020-07-20 11:47:41,018 INFO L109 eAbstractionObserver]: Analyzing ICFG ss4f.c [2020-07-20 11:47:41,026 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:47:41,032 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:47:41,045 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:47:41,068 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:47:41,068 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:47:41,069 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:47:41,069 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:47:41,069 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:47:41,069 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:47:41,069 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:47:41,069 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:47:41,088 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-07-20 11:47:41,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 11:47:41,095 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:47:41,096 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] [2020-07-20 11:47:41,096 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:47:41,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:47:41,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1562148239, now seen corresponding path program 1 times [2020-07-20 11:47:41,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:47:41,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043216218] [2020-07-20 11:47:41,112 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 [2020-07-20 11:47:41,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:47:41,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 11:47:41,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:47:41,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:47:41,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:47:41,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043216218] [2020-07-20 11:47:41,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:47:41,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 11:47:41,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097682003] [2020-07-20 11:47:41,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 11:47:41,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:47:41,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 11:47:41,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:47:41,278 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 2 states. [2020-07-20 11:47:41,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:47:41,304 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2020-07-20 11:47:41,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 11:47:41,305 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 25 [2020-07-20 11:47:41,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:47:41,314 INFO L225 Difference]: With dead ends: 64 [2020-07-20 11:47:41,315 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 11:47:41,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:47:41,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 11:47:41,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 11:47:41,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 11:47:41,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-07-20 11:47:41,360 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 25 [2020-07-20 11:47:41,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:47:41,360 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-07-20 11:47:41,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 11:47:41,361 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-07-20 11:47:41,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 11:47:41,362 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:47:41,362 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] [2020-07-20 11:47:41,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:41,578 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:47:41,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:47:41,579 INFO L82 PathProgramCache]: Analyzing trace with hash 369304979, now seen corresponding path program 1 times [2020-07-20 11:47:41,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:47:41,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013405292] [2020-07-20 11:47:41,580 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 [2020-07-20 11:47:41,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:47:41,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:47:41,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:47:41,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:47:41,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:47:41,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1013405292] [2020-07-20 11:47:41,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:47:41,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 11:47:41,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770754647] [2020-07-20 11:47:41,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 11:47:41,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:47:41,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 11:47:41,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:47:41,758 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 4 states. [2020-07-20 11:47:41,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:47:41,872 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2020-07-20 11:47:41,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 11:47:41,873 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-07-20 11:47:41,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:47:41,874 INFO L225 Difference]: With dead ends: 53 [2020-07-20 11:47:41,874 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 11:47:41,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:47:41,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 11:47:41,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-07-20 11:47:41,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-20 11:47:41,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-07-20 11:47:41,883 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 25 [2020-07-20 11:47:41,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:47:41,884 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-07-20 11:47:41,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 11:47:41,884 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-07-20 11:47:41,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-20 11:47:41,886 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:47:41,886 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] [2020-07-20 11:47:42,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:42,102 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:47:42,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:47:42,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1815337701, now seen corresponding path program 1 times [2020-07-20 11:47:42,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:47:42,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221049784] [2020-07-20 11:47:42,105 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 [2020-07-20 11:47:42,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:47:42,161 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:47:42,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:47:42,184 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:47:42,213 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 11:47:42,214 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 11:47:42,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:42,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:47:42 BoogieIcfgContainer [2020-07-20 11:47:42,470 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:47:42,473 INFO L168 Benchmark]: Toolchain (without parser) took 2254.55 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 102.6 MB in the beginning and 98.1 MB in the end (delta: 4.6 MB). Peak memory consumption was 68.0 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:42,474 INFO L168 Benchmark]: CDTParser took 0.17 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: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 11:47:42,475 INFO L168 Benchmark]: CACSL2BoogieTranslator took 269.64 ms. Allocated memory is still 137.9 MB. Free memory was 102.2 MB in the beginning and 91.6 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:42,476 INFO L168 Benchmark]: Boogie Preprocessor took 120.37 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 91.6 MB in the beginning and 178.4 MB in the end (delta: -86.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:42,476 INFO L168 Benchmark]: RCFGBuilder took 399.07 ms. Allocated memory is still 201.3 MB. Free memory was 178.4 MB in the beginning and 160.5 MB in the end (delta: 17.9 MB). Peak memory consumption was 17.9 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:42,477 INFO L168 Benchmark]: TraceAbstraction took 1459.38 ms. Allocated memory is still 201.3 MB. Free memory was 159.8 MB in the beginning and 98.1 MB in the end (delta: 61.7 MB). Peak memory consumption was 61.7 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:42,481 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 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: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 269.64 ms. Allocated memory is still 137.9 MB. Free memory was 102.2 MB in the beginning and 91.6 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 120.37 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 91.6 MB in the beginning and 178.4 MB in the end (delta: -86.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 399.07 ms. Allocated memory is still 201.3 MB. Free memory was 178.4 MB in the beginning and 160.5 MB in the end (delta: 17.9 MB). Peak memory consumption was 17.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1459.38 ms. Allocated memory is still 201.3 MB. Free memory was 159.8 MB in the beginning and 98.1 MB in the end (delta: 61.7 MB). Peak memory consumption was 61.7 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)=4, 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