/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/ms1f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:38:31,676 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:38:31,678 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:38:31,691 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:38:31,691 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:38:31,693 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:38:31,695 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:38:31,705 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:38:31,707 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:38:31,709 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:38:31,710 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:38:31,712 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:38:31,712 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:38:31,713 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:38:31,716 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:38:31,718 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:38:31,720 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:38:31,723 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:38:31,725 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:38:31,730 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:38:31,735 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:38:31,736 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:38:31,737 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:38:31,738 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:38:31,740 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 11:38:31,741 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 11:38:31,741 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 11:38:31,743 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 11:38:31,744 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 11:38:31,746 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 11:38:31,746 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 11:38:31,748 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 11:38:31,748 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 11:38:31,749 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 11:38:31,753 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 11:38:31,753 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 11:38:31,754 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 11:38:31,754 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 11:38:31,754 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:38:31,755 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:38:31,757 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:38:31,757 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 [2020-07-21 11:38:31,793 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:38:31,796 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:38:31,798 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:38:31,798 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:38:31,798 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:38:31,798 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:38:31,799 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:38:31,799 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:38:31,799 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:38:31,803 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:38:31,803 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:38:31,804 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:38:31,804 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:38:31,804 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:38:31,804 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:38:31,804 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:38:31,805 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:38:31,805 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:38:31,805 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:38:31,805 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:38:31,805 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:38:31,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:38:31,806 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:38:31,806 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:38:31,806 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:38:31,806 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:38:31,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:38:31,807 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:38:31,807 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:38:31,807 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 [2020-07-21 11:38:32,080 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:38:32,096 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:38:32,100 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:38:32,102 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:38:32,104 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:38:32,105 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ms1f.c [2020-07-21 11:38:32,182 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5436c1350/d3f9ee2278474c0aa9d91af403b965c1/FLAGe0cd17c3b [2020-07-21 11:38:32,637 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:38:32,638 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ms1f.c [2020-07-21 11:38:32,648 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5436c1350/d3f9ee2278474c0aa9d91af403b965c1/FLAGe0cd17c3b [2020-07-21 11:38:32,994 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5436c1350/d3f9ee2278474c0aa9d91af403b965c1 [2020-07-21 11:38:33,006 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:38:33,009 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:38:33,011 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:38:33,012 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:38:33,015 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:38:33,016 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:38:32" (1/1) ... [2020-07-21 11:38:33,018 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a27c3cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:38:33, skipping insertion in model container [2020-07-21 11:38:33,019 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:38:32" (1/1) ... [2020-07-21 11:38:33,027 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:38:33,043 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:38:33,224 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:38:33,232 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:38:33,249 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:38:33,268 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:38:33,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:38:33 WrapperNode [2020-07-21 11:38:33,268 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:38:33,269 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:38:33,269 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:38:33,269 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:38:33,357 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:38:33" (1/1) ... [2020-07-21 11:38:33,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:38:33" (1/1) ... [2020-07-21 11:38:33,370 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:38:33" (1/1) ... [2020-07-21 11:38:33,371 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:38:33" (1/1) ... [2020-07-21 11:38:33,392 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:38:33" (1/1) ... [2020-07-21 11:38:33,397 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:38:33" (1/1) ... [2020-07-21 11:38:33,405 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:38:33" (1/1) ... [2020-07-21 11:38:33,408 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:38:33,410 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:38:33,410 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:38:33,410 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:38:33,411 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:38:33" (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 [2020-07-21 11:38:33,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:38:33,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:38:33,478 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 11:38:33,478 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 11:38:33,478 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:38:33,478 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:38:33,479 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 11:38:33,479 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 11:38:33,479 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 11:38:33,479 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 11:38:33,479 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 11:38:33,480 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:38:33,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 11:38:33,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 11:38:33,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 11:38:33,480 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 11:38:33,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 11:38:33,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:38:33,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:38:33,758 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:38:33,758 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 11:38:33,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:38:33 BoogieIcfgContainer [2020-07-21 11:38:33,763 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:38:33,764 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:38:33,764 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:38:33,768 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:38:33,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:38:32" (1/3) ... [2020-07-21 11:38:33,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aba5389 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:38:33, skipping insertion in model container [2020-07-21 11:38:33,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:38:33" (2/3) ... [2020-07-21 11:38:33,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aba5389 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:38:33, skipping insertion in model container [2020-07-21 11:38:33,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:38:33" (3/3) ... [2020-07-21 11:38:33,772 INFO L109 eAbstractionObserver]: Analyzing ICFG ms1f.c [2020-07-21 11:38:33,783 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:38:33,791 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:38:33,806 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:38:33,829 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:38:33,829 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:38:33,829 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:38:33,829 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:38:33,829 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:38:33,829 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:38:33,830 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:38:33,830 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:38:33,847 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-07-21 11:38:33,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 11:38:33,852 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:38:33,853 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] [2020-07-21 11:38:33,853 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:38:33,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:38:33,858 INFO L82 PathProgramCache]: Analyzing trace with hash -432131487, now seen corresponding path program 1 times [2020-07-21 11:38:33,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:38:33,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [123888154] [2020-07-21 11:38:33,867 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 [2020-07-21 11:38:33,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:38:33,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 11:38:33,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:38:33,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:38:34,000 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:38:34,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [123888154] [2020-07-21 11:38:34,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:38:34,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 11:38:34,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966375532] [2020-07-21 11:38:34,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 11:38:34,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:38:34,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 11:38:34,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 11:38:34,025 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-07-21 11:38:34,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:38:34,046 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2020-07-21 11:38:34,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 11:38:34,048 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2020-07-21 11:38:34,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:38:34,055 INFO L225 Difference]: With dead ends: 54 [2020-07-21 11:38:34,056 INFO L226 Difference]: Without dead ends: 25 [2020-07-21 11:38:34,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 11:38:34,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-21 11:38:34,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-21 11:38:34,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-21 11:38:34,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-07-21 11:38:34,104 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2020-07-21 11:38:34,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:38:34,104 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-07-21 11:38:34,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 11:38:34,105 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-07-21 11:38:34,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 11:38:34,106 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:38:34,106 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] [2020-07-21 11:38:34,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:38:34,322 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:38:34,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:38:34,323 INFO L82 PathProgramCache]: Analyzing trace with hash -173966049, now seen corresponding path program 1 times [2020-07-21 11:38:34,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:38:34,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35437938] [2020-07-21 11:38:34,325 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 [2020-07-21 11:38:34,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:38:34,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:38:34,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:38:34,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:38:34,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:38:34,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35437938] [2020-07-21 11:38:34,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:38:34,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 11:38:34,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021780946] [2020-07-21 11:38:34,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 11:38:34,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:38:34,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 11:38:34,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 11:38:34,444 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 4 states. [2020-07-21 11:38:34,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:38:34,517 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-07-21 11:38:34,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 11:38:34,518 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-07-21 11:38:34,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:38:34,519 INFO L225 Difference]: With dead ends: 40 [2020-07-21 11:38:34,520 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 11:38:34,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 11:38:34,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 11:38:34,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-07-21 11:38:34,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 11:38:34,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-07-21 11:38:34,530 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-07-21 11:38:34,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:38:34,530 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-07-21 11:38:34,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 11:38:34,531 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-07-21 11:38:34,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 11:38:34,532 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:38:34,532 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] [2020-07-21 11:38:34,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:38:34,746 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:38:34,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:38:34,748 INFO L82 PathProgramCache]: Analyzing trace with hash -445719797, now seen corresponding path program 1 times [2020-07-21 11:38:34,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:38:34,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1433791120] [2020-07-21 11:38:34,749 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 [2020-07-21 11:38:34,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:38:34,799 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:38:34,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:38:34,814 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:38:34,835 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 11:38:34,836 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 11:38:35,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:38:35,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:38:35 BoogieIcfgContainer [2020-07-21 11:38:35,091 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 11:38:35,094 INFO L168 Benchmark]: Toolchain (without parser) took 2085.05 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 104.0 MB in the beginning and 107.5 MB in the end (delta: -3.4 MB). Peak memory consumption was 60.6 MB. Max. memory is 7.1 GB. [2020-07-21 11:38:35,095 INFO L168 Benchmark]: CDTParser took 0.22 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: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-21 11:38:35,096 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.57 ms. Allocated memory is still 138.9 MB. Free memory was 103.6 MB in the beginning and 93.4 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-07-21 11:38:35,097 INFO L168 Benchmark]: Boogie Preprocessor took 139.22 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 93.4 MB in the beginning and 181.0 MB in the end (delta: -87.6 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-21 11:38:35,098 INFO L168 Benchmark]: RCFGBuilder took 353.25 ms. Allocated memory is still 202.9 MB. Free memory was 181.0 MB in the beginning and 164.4 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. [2020-07-21 11:38:35,099 INFO L168 Benchmark]: TraceAbstraction took 1326.74 ms. Allocated memory is still 202.9 MB. Free memory was 163.7 MB in the beginning and 107.5 MB in the end (delta: 56.2 MB). Peak memory consumption was 56.2 MB. Max. memory is 7.1 GB. [2020-07-21 11:38:35,103 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 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: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 257.57 ms. Allocated memory is still 138.9 MB. Free memory was 103.6 MB in the beginning and 93.4 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 139.22 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 93.4 MB in the beginning and 181.0 MB in the end (delta: -87.6 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 353.25 ms. Allocated memory is still 202.9 MB. Free memory was 181.0 MB in the beginning and 164.4 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1326.74 ms. Allocated memory is still 202.9 MB. Free memory was 163.7 MB in the beginning and 107.5 MB in the end (delta: 56.2 MB). Peak memory consumption was 56.2 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)=3, 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] i=0 VAL [\old(N)=0, a={2438:0}, i=0, malloc(sizeof(int)*N)={2438:0}, N=1, sum={2440:0}] [L29] COND TRUE i