/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/res2of.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:47:09,866 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:47:09,870 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:47:09,893 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:47:09,894 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:47:09,896 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:47:09,899 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:47:09,910 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:47:09,914 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:47:09,915 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:47:09,916 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:47:09,917 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:47:09,918 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:47:09,924 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:47:09,926 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:47:09,928 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:47:09,929 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:47:09,930 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:47:09,932 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:47:09,938 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:47:09,942 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:47:09,945 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:47:09,947 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:47:09,948 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:47:09,951 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 11:47:09,952 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 11:47:09,952 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 11:47:09,955 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 11:47:09,955 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 11:47:09,958 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 11:47:09,958 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 11:47:09,960 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 11:47:09,961 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 11:47:09,961 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 11:47:09,965 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 11:47:09,965 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 11:47:09,966 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 11:47:09,966 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 11:47:09,967 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:47:09,968 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:47:09,969 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:47:09,970 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 11:47:10,010 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:47:10,011 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:47:10,016 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:47:10,016 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:47:10,016 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:47:10,017 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:47:10,017 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:47:10,017 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:47:10,018 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:47:10,019 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:47:10,019 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:47:10,019 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:47:10,019 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:47:10,019 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:47:10,020 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:47:10,020 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:47:10,020 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:47:10,022 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:47:10,022 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:47:10,022 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:47:10,022 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:47:10,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:47:10,023 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:47:10,023 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:47:10,026 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:47:10,027 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:47:10,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:10,027 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:47:10,027 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:47:10,028 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 11:47:10,379 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:47:10,398 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:47:10,401 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:47:10,402 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:47:10,403 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:47:10,404 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/res2of.c [2020-07-20 11:47:10,494 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31ae93322/71b0782224a44b6c8bba7752a821d99d/FLAG9cefcce0b [2020-07-20 11:47:11,020 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:47:11,021 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/res2of.c [2020-07-20 11:47:11,034 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31ae93322/71b0782224a44b6c8bba7752a821d99d/FLAG9cefcce0b [2020-07-20 11:47:11,365 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31ae93322/71b0782224a44b6c8bba7752a821d99d [2020-07-20 11:47:11,378 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:47:11,382 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:47:11,384 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:47:11,384 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:47:11,388 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:47:11,389 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:47:11" (1/1) ... [2020-07-20 11:47:11,393 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@778246e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:11, skipping insertion in model container [2020-07-20 11:47:11,393 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:47:11" (1/1) ... [2020-07-20 11:47:11,404 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:47:11,427 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:47:11,645 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:47:11,657 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:47:11,685 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:47:11,703 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:47:11,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:11 WrapperNode [2020-07-20 11:47:11,704 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:47:11,705 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:47:11,705 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:47:11,705 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:47:11,814 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:11" (1/1) ... [2020-07-20 11:47:11,816 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:11" (1/1) ... [2020-07-20 11:47:11,826 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:11" (1/1) ... [2020-07-20 11:47:11,827 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:11" (1/1) ... [2020-07-20 11:47:11,840 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:11" (1/1) ... [2020-07-20 11:47:11,849 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:11" (1/1) ... [2020-07-20 11:47:11,851 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:11" (1/1) ... [2020-07-20 11:47:11,854 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:47:11,855 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:47:11,855 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:47:11,855 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:47:11,857 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:11" (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 11:47:11,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:47:11,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:47:11,944 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 11:47:11,944 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 11:47:11,944 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:47:11,944 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:47:11,944 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 11:47:11,945 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 11:47:11,945 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 11:47:11,945 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:47:11,945 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 11:47:11,945 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:47:11,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 11:47:11,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 11:47:11,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 11:47:11,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 11:47:11,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 11:47:11,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:47:11,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:47:12,348 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:47:12,348 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-07-20 11:47:12,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:47:12 BoogieIcfgContainer [2020-07-20 11:47:12,353 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:47:12,355 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:47:12,355 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:47:12,359 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:47:12,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:47:11" (1/3) ... [2020-07-20 11:47:12,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12544f40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:47:12, skipping insertion in model container [2020-07-20 11:47:12,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:11" (2/3) ... [2020-07-20 11:47:12,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12544f40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:47:12, skipping insertion in model container [2020-07-20 11:47:12,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:47:12" (3/3) ... [2020-07-20 11:47:12,364 INFO L109 eAbstractionObserver]: Analyzing ICFG res2of.c [2020-07-20 11:47:12,376 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:47:12,387 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:47:12,404 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:47:12,431 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:47:12,431 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:47:12,431 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:47:12,431 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:47:12,432 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:47:12,432 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:47:12,432 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:47:12,432 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:47:12,454 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-07-20 11:47:12,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 11:47:12,460 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:47:12,462 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] [2020-07-20 11:47:12,462 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:47:12,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:47:12,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1797528887, now seen corresponding path program 1 times [2020-07-20 11:47:12,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:47:12,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708491276] [2020-07-20 11:47:12,478 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 11:47:12,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:47:12,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 11:47:12,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:47:12,706 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 11:47:12,707 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:47:12,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708491276] [2020-07-20 11:47:12,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:47:12,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 11:47:12,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326197485] [2020-07-20 11:47:12,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 11:47:12,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:47:12,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 11:47:12,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:47:12,747 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 2 states. [2020-07-20 11:47:12,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:47:12,795 INFO L93 Difference]: Finished difference Result 76 states and 103 transitions. [2020-07-20 11:47:12,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 11:47:12,797 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 29 [2020-07-20 11:47:12,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:47:12,805 INFO L225 Difference]: With dead ends: 76 [2020-07-20 11:47:12,806 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 11:47:12,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 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 11:47:12,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 11:47:12,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-20 11:47:12,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 11:47:12,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-07-20 11:47:12,853 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 29 [2020-07-20 11:47:12,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:47:12,854 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-07-20 11:47:12,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 11:47:12,854 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-07-20 11:47:12,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 11:47:12,855 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:47:12,856 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] [2020-07-20 11:47:13,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:13,063 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:47:13,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:47:13,064 INFO L82 PathProgramCache]: Analyzing trace with hash 120259143, now seen corresponding path program 1 times [2020-07-20 11:47:13,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:47:13,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655724657] [2020-07-20 11:47:13,066 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 11:47:13,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:47:13,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:47:13,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:47:13,221 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 11:47:13,221 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:47:13,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655724657] [2020-07-20 11:47:13,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:47:13,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 11:47:13,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619960557] [2020-07-20 11:47:13,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 11:47:13,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:47:13,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 11:47:13,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:47:13,227 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 4 states. [2020-07-20 11:47:13,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:47:13,353 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2020-07-20 11:47:13,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 11:47:13,354 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-07-20 11:47:13,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:47:13,356 INFO L225 Difference]: With dead ends: 69 [2020-07-20 11:47:13,357 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 11:47:13,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 26 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 11:47:13,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 11:47:13,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-07-20 11:47:13,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-20 11:47:13,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-07-20 11:47:13,370 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 29 [2020-07-20 11:47:13,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:47:13,370 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-07-20 11:47:13,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 11:47:13,371 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-07-20 11:47:13,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-20 11:47:13,372 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:47:13,372 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:47:13,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:13,589 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:47:13,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:47:13,590 INFO L82 PathProgramCache]: Analyzing trace with hash -774790125, now seen corresponding path program 1 times [2020-07-20 11:47:13,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:47:13,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963313285] [2020-07-20 11:47:13,592 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 11:47:13,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:47:13,673 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:47:13,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:47:13,709 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:47:13,777 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 11:47:13,778 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 11:47:13,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:14,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:47:14 BoogieIcfgContainer [2020-07-20 11:47:14,062 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:47:14,069 INFO L168 Benchmark]: Toolchain (without parser) took 2684.07 ms. Allocated memory was 138.9 MB in the beginning and 234.4 MB in the end (delta: 95.4 MB). Free memory was 104.0 MB in the beginning and 201.5 MB in the end (delta: -97.4 MB). Peak memory consumption was 84.2 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:14,072 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 11:47:14,073 INFO L168 Benchmark]: CACSL2BoogieTranslator took 320.93 ms. Allocated memory is still 138.9 MB. Free memory was 103.6 MB in the beginning and 92.3 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:14,075 INFO L168 Benchmark]: Boogie Preprocessor took 149.86 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 92.3 MB in the beginning and 180.9 MB in the end (delta: -88.6 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:14,076 INFO L168 Benchmark]: RCFGBuilder took 498.41 ms. Allocated memory is still 203.4 MB. Free memory was 180.9 MB in the beginning and 160.8 MB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:14,077 INFO L168 Benchmark]: TraceAbstraction took 1707.04 ms. Allocated memory was 203.4 MB in the beginning and 234.4 MB in the end (delta: 30.9 MB). Free memory was 160.2 MB in the beginning and 201.5 MB in the end (delta: -41.3 MB). Peak memory consumption was 75.8 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:14,082 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 320.93 ms. Allocated memory is still 138.9 MB. Free memory was 103.6 MB in the beginning and 92.3 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 149.86 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 92.3 MB in the beginning and 180.9 MB in the end (delta: -88.6 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 498.41 ms. Allocated memory is still 203.4 MB. Free memory was 180.9 MB in the beginning and 160.8 MB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1707.04 ms. Allocated memory was 203.4 MB in the beginning and 234.4 MB in the end (delta: 30.9 MB). Free memory was 160.2 MB in the beginning and 201.5 MB in the end (delta: -41.3 MB). Peak memory consumption was 75.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; VAL [\old(N)=6, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=1] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=1] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=1] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=1] [L25] int i; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L28] int *b = malloc(sizeof(int)*N); [L29] int *c = malloc(sizeof(int)*N); [L31] sum[0] = 0 [L32] i=0 VAL [\old(N)=0, a={-2:0}, b={-1:0}, c={-3:0}, i=0, malloc(sizeof(int)*N)={-1:0}, malloc(sizeof(int)*N)={-3:0}, malloc(sizeof(int)*N)={-2:0}, N=1, sum={2:0}] [L32] COND TRUE i