/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/modpf.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:46:49,049 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:46:49,052 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:46:49,070 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:46:49,071 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:46:49,072 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:46:49,073 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:46:49,075 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:46:49,077 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:46:49,078 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:46:49,079 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:46:49,080 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:46:49,081 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:46:49,082 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:46:49,083 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:46:49,084 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:46:49,085 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:46:49,086 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:46:49,088 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:46:49,090 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:46:49,092 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:46:49,093 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:46:49,094 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:46:49,095 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:46:49,098 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 11:46:49,098 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 11:46:49,098 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 11:46:49,099 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 11:46:49,100 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 11:46:49,101 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 11:46:49,101 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 11:46:49,102 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 11:46:49,103 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 11:46:49,104 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 11:46:49,105 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 11:46:49,105 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 11:46:49,106 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 11:46:49,106 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 11:46:49,106 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:46:49,107 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:46:49,108 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:46:49,111 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 11:46:49,132 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:46:49,132 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:46:49,133 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:46:49,134 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:46:49,134 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:46:49,134 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:46:49,134 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:46:49,134 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:46:49,135 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:46:49,135 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:46:49,135 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:46:49,135 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:46:49,135 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:46:49,135 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:46:49,136 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:46:49,136 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:46:49,136 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:46:49,136 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:46:49,136 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:46:49,137 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:46:49,137 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:46:49,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:46:49,137 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:46:49,138 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:46:49,138 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:46:49,138 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:46:49,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:46:49,138 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:46:49,138 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:46:49,139 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 11:46:49,413 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:46:49,431 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:46:49,437 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:46:49,439 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:46:49,443 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:46:49,445 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/modpf.c [2020-07-20 11:46:49,534 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d11b1a4d/07e2dc6d2b714fa6b8afd7079f0451ab/FLAGd17153d81 [2020-07-20 11:46:50,095 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:46:50,096 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/modpf.c [2020-07-20 11:46:50,104 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d11b1a4d/07e2dc6d2b714fa6b8afd7079f0451ab/FLAGd17153d81 [2020-07-20 11:46:50,484 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d11b1a4d/07e2dc6d2b714fa6b8afd7079f0451ab [2020-07-20 11:46:50,495 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:46:50,497 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:46:50,498 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:46:50,499 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:46:50,502 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:46:50,504 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:46:50" (1/1) ... [2020-07-20 11:46:50,507 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@653358de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:46:50, skipping insertion in model container [2020-07-20 11:46:50,507 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:46:50" (1/1) ... [2020-07-20 11:46:50,515 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:46:50,534 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:46:50,736 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:46:50,747 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:46:50,770 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:46:50,788 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:46:50,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:46:50 WrapperNode [2020-07-20 11:46:50,788 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:46:50,789 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:46:50,789 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:46:50,790 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:46:50,882 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:46:50" (1/1) ... [2020-07-20 11:46:50,883 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:46:50" (1/1) ... [2020-07-20 11:46:50,891 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:46:50" (1/1) ... [2020-07-20 11:46:50,892 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:46:50" (1/1) ... [2020-07-20 11:46:50,902 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:46:50" (1/1) ... [2020-07-20 11:46:50,907 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:46:50" (1/1) ... [2020-07-20 11:46:50,909 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:46:50" (1/1) ... [2020-07-20 11:46:50,911 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:46:50,912 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:46:50,912 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:46:50,912 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:46:50,913 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:46:50" (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 11:46:50,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:46:50,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:46:50,972 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 11:46:50,972 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 11:46:50,973 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:46:50,973 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:46:50,973 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 11:46:50,973 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 11:46:50,973 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 11:46:50,973 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:46:50,974 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 11:46:50,974 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:46:50,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 11:46:50,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 11:46:50,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 11:46:50,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 11:46:50,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 11:46:50,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:46:50,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:46:51,323 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:46:51,323 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 11:46:51,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:46:51 BoogieIcfgContainer [2020-07-20 11:46:51,328 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:46:51,329 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:46:51,329 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:46:51,332 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:46:51,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:46:50" (1/3) ... [2020-07-20 11:46:51,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@196c39d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:46:51, skipping insertion in model container [2020-07-20 11:46:51,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:46:50" (2/3) ... [2020-07-20 11:46:51,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@196c39d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:46:51, skipping insertion in model container [2020-07-20 11:46:51,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:46:51" (3/3) ... [2020-07-20 11:46:51,337 INFO L109 eAbstractionObserver]: Analyzing ICFG modpf.c [2020-07-20 11:46:51,349 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:46:51,356 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:46:51,372 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:46:51,400 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:46:51,400 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:46:51,401 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:46:51,401 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:46:51,401 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:46:51,401 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:46:51,401 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:46:51,402 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:46:51,422 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-07-20 11:46:51,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 11:46:51,429 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:46:51,430 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] [2020-07-20 11:46:51,431 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:46:51,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:46:51,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1314760119, now seen corresponding path program 1 times [2020-07-20 11:46:51,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:46:51,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562498470] [2020-07-20 11:46:51,444 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 11:46:51,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:46:51,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 11:46:51,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:46:51,569 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 11:46:51,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:46:51,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562498470] [2020-07-20 11:46:51,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:46:51,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 11:46:51,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483887090] [2020-07-20 11:46:51,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 11:46:51,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:46:51,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 11:46:51,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:46:51,596 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 2 states. [2020-07-20 11:46:51,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:46:51,621 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2020-07-20 11:46:51,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 11:46:51,623 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2020-07-20 11:46:51,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:46:51,633 INFO L225 Difference]: With dead ends: 58 [2020-07-20 11:46:51,634 INFO L226 Difference]: Without dead ends: 29 [2020-07-20 11:46:51,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 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 11:46:51,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-20 11:46:51,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-20 11:46:51,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-20 11:46:51,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-07-20 11:46:51,683 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2020-07-20 11:46:51,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:46:51,683 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-07-20 11:46:51,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 11:46:51,684 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-07-20 11:46:51,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 11:46:51,685 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:46:51,685 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] [2020-07-20 11:46:51,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:46:51,894 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:46:51,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:46:51,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1901566133, now seen corresponding path program 1 times [2020-07-20 11:46:51,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:46:51,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1012236119] [2020-07-20 11:46:51,897 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 11:46:51,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:46:51,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:46:52,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:46:52,070 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 11:46:52,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:46:52,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1012236119] [2020-07-20 11:46:52,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:46:52,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 11:46:52,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375298498] [2020-07-20 11:46:52,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 11:46:52,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:46:52,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 11:46:52,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:46:52,077 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 4 states. [2020-07-20 11:46:52,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:46:52,208 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-07-20 11:46:52,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 11:46:52,210 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-07-20 11:46:52,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:46:52,214 INFO L225 Difference]: With dead ends: 51 [2020-07-20 11:46:52,214 INFO L226 Difference]: Without dead ends: 37 [2020-07-20 11:46:52,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 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 11:46:52,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-20 11:46:52,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2020-07-20 11:46:52,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 11:46:52,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-07-20 11:46:52,235 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 22 [2020-07-20 11:46:52,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:46:52,235 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-07-20 11:46:52,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 11:46:52,236 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-07-20 11:46:52,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 11:46:52,237 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:46:52,237 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:46:52,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:46:52,439 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:46:52,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:46:52,441 INFO L82 PathProgramCache]: Analyzing trace with hash -69884793, now seen corresponding path program 1 times [2020-07-20 11:46:52,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:46:52,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237857930] [2020-07-20 11:46:52,442 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 11:46:52,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:46:52,501 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:46:52,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:46:52,529 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:46:52,568 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 11:46:52,570 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 11:46:52,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:46:52,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:46:52 BoogieIcfgContainer [2020-07-20 11:46:52,821 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:46:52,824 INFO L168 Benchmark]: Toolchain (without parser) took 2326.72 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 101.9 MB in the beginning and 106.0 MB in the end (delta: -4.1 MB). Peak memory consumption was 59.9 MB. Max. memory is 7.1 GB. [2020-07-20 11:46:52,825 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 138.9 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-20 11:46:52,826 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.44 ms. Allocated memory is still 138.9 MB. Free memory was 101.5 MB in the beginning and 91.2 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:46:52,827 INFO L168 Benchmark]: Boogie Preprocessor took 122.30 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 91.2 MB in the beginning and 180.4 MB in the end (delta: -89.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-07-20 11:46:52,829 INFO L168 Benchmark]: RCFGBuilder took 416.31 ms. Allocated memory is still 202.9 MB. Free memory was 180.4 MB in the beginning and 163.8 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. [2020-07-20 11:46:52,829 INFO L168 Benchmark]: TraceAbstraction took 1492.03 ms. Allocated memory is still 202.9 MB. Free memory was 163.2 MB in the beginning and 106.0 MB in the end (delta: 57.2 MB). Peak memory consumption was 57.2 MB. Max. memory is 7.1 GB. [2020-07-20 11:46:52,834 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 138.9 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 290.44 ms. Allocated memory is still 138.9 MB. Free memory was 101.5 MB in the beginning and 91.2 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 122.30 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 91.2 MB in the beginning and 180.4 MB in the end (delta: -89.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 416.31 ms. Allocated memory is still 202.9 MB. Free memory was 180.4 MB in the beginning and 163.8 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1492.03 ms. Allocated memory is still 202.9 MB. Free memory was 163.2 MB in the beginning and 106.0 MB in the end (delta: 57.2 MB). Peak memory consumption was 57.2 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)=7, 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] int sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] sum[0] = 0 [L30] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=1, sum={2:0}] [L30] COND TRUE i