/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/s32iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:38:54,906 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:38:54,909 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:38:54,927 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:38:54,928 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:38:54,930 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:38:54,931 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:38:54,941 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:38:54,946 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:38:54,950 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:38:54,951 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:38:54,953 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:38:54,953 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:38:54,955 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:38:54,957 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:38:54,958 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:38:54,960 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:38:54,961 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:38:54,962 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:38:54,967 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:38:54,972 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:38:54,976 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:38:54,977 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:38:54,978 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:38:54,980 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 11:38:54,991 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:38:54,992 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:38:54,993 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:38:54,994 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 11:38:55,028 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:38:55,028 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:38:55,029 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:38:55,029 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:38:55,030 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:38:55,030 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:38:55,030 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:38:55,030 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:38:55,031 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:38:55,031 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:38:55,031 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:38:55,031 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:38:55,031 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:38:55,031 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:38:55,032 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:38:55,032 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:38:55,032 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:38:55,032 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:38:55,032 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:38:55,033 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:38:55,033 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:38:55,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:38:55,033 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:38:55,033 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:38:55,034 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:38:55,034 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:38:55,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:38:55,034 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:38:55,034 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:38:55,035 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 11:38:55,332 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:38:55,354 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:38:55,358 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:38:55,360 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:38:55,360 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:38:55,362 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s32iff.c [2020-07-21 11:38:55,444 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f1460436/d0da4f514bb44feea1083bbccc870187/FLAGcd7129752 [2020-07-21 11:38:55,905 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:38:55,905 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s32iff.c [2020-07-21 11:38:55,912 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f1460436/d0da4f514bb44feea1083bbccc870187/FLAGcd7129752 [2020-07-21 11:38:56,313 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f1460436/d0da4f514bb44feea1083bbccc870187 [2020-07-21 11:38:56,322 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:38:56,325 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:38:56,326 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:38:56,326 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:38:56,330 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:38:56,331 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:38:56" (1/1) ... [2020-07-21 11:38:56,334 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2aa9416 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:38:56, skipping insertion in model container [2020-07-21 11:38:56,334 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:38:56" (1/1) ... [2020-07-21 11:38:56,342 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:38:56,359 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:38:56,573 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:38:56,580 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:38:56,603 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:38:56,617 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:38:56,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:38:56 WrapperNode [2020-07-21 11:38:56,618 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:38:56,619 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:38:56,619 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:38:56,619 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:38:56,717 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:38:56" (1/1) ... [2020-07-21 11:38:56,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:38:56" (1/1) ... [2020-07-21 11:38:56,730 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:38:56" (1/1) ... [2020-07-21 11:38:56,731 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:38:56" (1/1) ... [2020-07-21 11:38:56,742 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:38:56" (1/1) ... [2020-07-21 11:38:56,748 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:38:56" (1/1) ... [2020-07-21 11:38:56,750 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:38:56" (1/1) ... [2020-07-21 11:38:56,753 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:38:56,754 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:38:56,754 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:38:56,754 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:38:56,755 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:38:56" (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 11:38:56,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:38:56,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:38:56,817 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 11:38:56,817 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 11:38:56,817 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:38:56,817 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:38:56,817 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 11:38:56,818 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 11:38:56,818 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 11:38:56,818 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 11:38:56,818 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 11:38:56,818 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:38:56,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 11:38:56,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 11:38:56,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 11:38:56,819 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 11:38:56,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 11:38:56,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:38:56,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:38:57,115 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:38:57,115 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-21 11:38:57,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:38:57 BoogieIcfgContainer [2020-07-21 11:38:57,121 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:38:57,122 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:38:57,123 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:38:57,126 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:38:57,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:38:56" (1/3) ... [2020-07-21 11:38:57,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1df98372 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:38:57, skipping insertion in model container [2020-07-21 11:38:57,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:38:56" (2/3) ... [2020-07-21 11:38:57,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1df98372 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:38:57, skipping insertion in model container [2020-07-21 11:38:57,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:38:57" (3/3) ... [2020-07-21 11:38:57,144 INFO L109 eAbstractionObserver]: Analyzing ICFG s32iff.c [2020-07-21 11:38:57,170 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:38:57,178 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:38:57,203 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:38:57,224 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:38:57,224 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:38:57,224 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:38:57,224 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:38:57,224 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:38:57,224 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:38:57,225 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:38:57,225 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:38:57,239 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-07-21 11:38:57,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 11:38:57,245 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:38:57,246 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:38:57,246 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:38:57,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:38:57,251 INFO L82 PathProgramCache]: Analyzing trace with hash 2033030480, now seen corresponding path program 1 times [2020-07-21 11:38:57,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:38:57,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1310060397] [2020-07-21 11:38:57,258 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 11:38:57,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:38:57,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 11:38:57,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:38:57,382 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 11:38:57,383 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:38:57,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1310060397] [2020-07-21 11:38:57,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:38:57,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 11:38:57,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839610923] [2020-07-21 11:38:57,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 11:38:57,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:38:57,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 11:38:57,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 11:38:57,410 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 2 states. [2020-07-21 11:38:57,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:38:57,439 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2020-07-21 11:38:57,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 11:38:57,440 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 23 [2020-07-21 11:38:57,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:38:57,450 INFO L225 Difference]: With dead ends: 62 [2020-07-21 11:38:57,450 INFO L226 Difference]: Without dead ends: 29 [2020-07-21 11:38:57,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 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 11:38:57,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-21 11:38:57,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-21 11:38:57,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-21 11:38:57,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-07-21 11:38:57,494 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 23 [2020-07-21 11:38:57,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:38:57,494 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-07-21 11:38:57,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 11:38:57,495 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-07-21 11:38:57,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 11:38:57,496 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:38:57,496 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:38:57,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:38:57,703 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:38:57,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:38:57,704 INFO L82 PathProgramCache]: Analyzing trace with hash 706992569, now seen corresponding path program 1 times [2020-07-21 11:38:57,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:38:57,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506950750] [2020-07-21 11:38:57,706 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 11:38:57,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:38:57,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:38:57,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:38:57,842 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 11:38:57,843 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:38:57,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506950750] [2020-07-21 11:38:57,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:38:57,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 11:38:57,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337838971] [2020-07-21 11:38:57,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 11:38:57,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:38:57,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 11:38:57,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 11:38:57,848 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 4 states. [2020-07-21 11:38:57,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:38:57,959 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2020-07-21 11:38:57,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 11:38:57,960 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-07-21 11:38:57,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:38:57,961 INFO L225 Difference]: With dead ends: 51 [2020-07-21 11:38:57,961 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 11:38:57,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 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 11:38:57,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 11:38:57,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2020-07-21 11:38:57,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-21 11:38:57,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-07-21 11:38:57,971 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2020-07-21 11:38:57,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:38:57,972 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-07-21 11:38:57,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 11:38:57,972 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-07-21 11:38:57,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 11:38:57,973 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:38:57,974 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] [2020-07-21 11:38:58,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:38:58,187 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:38:58,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:38:58,188 INFO L82 PathProgramCache]: Analyzing trace with hash 284203188, now seen corresponding path program 1 times [2020-07-21 11:38:58,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:38:58,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [208918203] [2020-07-21 11:38:58,189 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 11:38:58,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:38:58,243 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:38:58,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:38:58,264 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:38:58,294 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 11:38:58,295 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 11:38:58,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:38:58,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:38:58 BoogieIcfgContainer [2020-07-21 11:38:58,550 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 11:38:58,553 INFO L168 Benchmark]: Toolchain (without parser) took 2228.24 ms. Allocated memory was 145.2 MB in the beginning and 201.9 MB in the end (delta: 56.6 MB). Free memory was 103.2 MB in the beginning and 99.1 MB in the end (delta: 4.2 MB). Peak memory consumption was 60.8 MB. Max. memory is 7.1 GB. [2020-07-21 11:38:58,554 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 145.2 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 11:38:58,554 INFO L168 Benchmark]: CACSL2BoogieTranslator took 292.75 ms. Allocated memory is still 145.2 MB. Free memory was 102.8 MB in the beginning and 92.0 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-07-21 11:38:58,556 INFO L168 Benchmark]: Boogie Preprocessor took 134.74 ms. Allocated memory was 145.2 MB in the beginning and 201.9 MB in the end (delta: 56.6 MB). Free memory was 92.0 MB in the beginning and 179.1 MB in the end (delta: -87.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-21 11:38:58,557 INFO L168 Benchmark]: RCFGBuilder took 366.86 ms. Allocated memory is still 201.9 MB. Free memory was 179.1 MB in the beginning and 160.8 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 7.1 GB. [2020-07-21 11:38:58,557 INFO L168 Benchmark]: TraceAbstraction took 1427.77 ms. Allocated memory is still 201.9 MB. Free memory was 160.1 MB in the beginning and 99.1 MB in the end (delta: 61.1 MB). Peak memory consumption was 61.1 MB. Max. memory is 7.1 GB. [2020-07-21 11:38:58,561 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 145.2 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 292.75 ms. Allocated memory is still 145.2 MB. Free memory was 102.8 MB in the beginning and 92.0 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 134.74 ms. Allocated memory was 145.2 MB in the beginning and 201.9 MB in the end (delta: 56.6 MB). Free memory was 92.0 MB in the beginning and 179.1 MB in the end (delta: -87.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 366.86 ms. Allocated memory is still 201.9 MB. Free memory was 179.1 MB in the beginning and 160.8 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1427.77 ms. Allocated memory is still 201.9 MB. Free memory was 160.1 MB in the beginning and 99.1 MB in the end (delta: 61.1 MB). Peak memory consumption was 61.1 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)=9, 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); [L29] sum[0] = 1 [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