/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/array-fpi/s32iff.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 00:16:12,084 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 00:16:12,088 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 00:16:12,145 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 00:16:12,173 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 00:16:12,175 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 00:16:12,178 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 00:16:12,180 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 00:16:12,183 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 00:16:12,184 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 00:16:12,186 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 00:16:12,193 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 00:16:12,195 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 00:16:12,197 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 00:16:12,198 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 00:16:12,200 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 00:16:12,202 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 00:16:12,229 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-24 00:16:12,246 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 00:16:12,246 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 00:16:12,248 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 00:16:12,248 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 00:16:12,249 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 00:16:12,249 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 00:16:12,249 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 00:16:12,249 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 00:16:12,249 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 00:16:12,250 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 00:16:12,250 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 00:16:12,250 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 00:16:12,250 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 00:16:12,251 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 00:16:12,251 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 00:16:12,251 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 00:16:12,251 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 00:16:12,251 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 00:16:12,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 00:16:12,252 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 00:16:12,252 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 00:16:12,252 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 00:16:12,253 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-24 00:16:12,604 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 00:16:12,629 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 00:16:12,632 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 00:16:12,633 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 00:16:12,634 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 00:16:12,635 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s32iff.c [2021-02-24 00:16:12,720 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cd47b7a9/8480bc3c02ac4c86a5f58c745132c5de/FLAGe0bdbeb51 [2021-02-24 00:16:13,353 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 00:16:13,355 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s32iff.c [2021-02-24 00:16:13,365 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cd47b7a9/8480bc3c02ac4c86a5f58c745132c5de/FLAGe0bdbeb51 [2021-02-24 00:16:13,688 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cd47b7a9/8480bc3c02ac4c86a5f58c745132c5de [2021-02-24 00:16:13,691 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 00:16:13,708 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 00:16:13,713 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 00:16:13,713 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 00:16:13,717 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 00:16:13,719 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:16:13" (1/1) ... [2021-02-24 00:16:13,721 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@621a3fdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:13, skipping insertion in model container [2021-02-24 00:16:13,721 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:16:13" (1/1) ... [2021-02-24 00:16:13,733 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 00:16:13,753 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 00:16:13,981 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s32iff.c[589,602] [2021-02-24 00:16:14,014 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:16:14,023 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 00:16:14,037 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s32iff.c[589,602] [2021-02-24 00:16:14,049 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:16:14,068 INFO L208 MainTranslator]: Completed translation [2021-02-24 00:16:14,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:14 WrapperNode [2021-02-24 00:16:14,069 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 00:16:14,070 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 00:16:14,070 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 00:16:14,070 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 00:16:14,086 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:14" (1/1) ... [2021-02-24 00:16:14,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:14" (1/1) ... [2021-02-24 00:16:14,095 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:14" (1/1) ... [2021-02-24 00:16:14,096 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:14" (1/1) ... [2021-02-24 00:16:14,106 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:14" (1/1) ... [2021-02-24 00:16:14,113 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:14" (1/1) ... [2021-02-24 00:16:14,115 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:14" (1/1) ... [2021-02-24 00:16:14,118 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 00:16:14,119 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 00:16:14,119 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 00:16:14,119 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 00:16:14,120 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:14" (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 [2021-02-24 00:16:14,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 00:16:14,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 00:16:14,237 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 00:16:14,237 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-24 00:16:14,237 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 00:16:14,238 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 00:16:14,238 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 00:16:14,238 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 00:16:14,238 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 00:16:14,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 00:16:14,239 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-24 00:16:14,240 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 00:16:14,240 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 00:16:14,240 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-24 00:16:14,241 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 00:16:14,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-24 00:16:14,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 00:16:14,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 00:16:14,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 00:16:14,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 00:16:14,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 00:16:14,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 00:16:14,835 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 00:16:14,836 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-02-24 00:16:14,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:16:14 BoogieIcfgContainer [2021-02-24 00:16:14,838 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 00:16:14,840 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 00:16:14,840 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 00:16:14,844 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 00:16:14,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 12:16:13" (1/3) ... [2021-02-24 00:16:14,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1958a52e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:16:14, skipping insertion in model container [2021-02-24 00:16:14,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:14" (2/3) ... [2021-02-24 00:16:14,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1958a52e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:16:14, skipping insertion in model container [2021-02-24 00:16:14,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:16:14" (3/3) ... [2021-02-24 00:16:14,847 INFO L111 eAbstractionObserver]: Analyzing ICFG s32iff.c [2021-02-24 00:16:14,855 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 00:16:14,860 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 00:16:14,883 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 00:16:14,911 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 00:16:14,911 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 00:16:14,911 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-24 00:16:14,911 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 00:16:14,911 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 00:16:14,912 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 00:16:14,912 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 00:16:14,912 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 00:16:14,930 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2021-02-24 00:16:14,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-24 00:16:14,941 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:14,942 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:16:14,942 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:14,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:14,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1439408661, now seen corresponding path program 1 times [2021-02-24 00:16:14,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:14,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891418484] [2021-02-24 00:16:14,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:15,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:15,193 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:15,194 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:15,196 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:15,197 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:15,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:16:15,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:15,265 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:15,266 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:15,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-24 00:16:15,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:15,276 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:15,277 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:15,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:16:15,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891418484] [2021-02-24 00:16:15,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:16:15,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-24 00:16:15,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400006070] [2021-02-24 00:16:15,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-24 00:16:15,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:16:15,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-24 00:16:15,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 00:16:15,323 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 3 states. [2021-02-24 00:16:15,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:16:15,543 INFO L93 Difference]: Finished difference Result 149 states and 168 transitions. [2021-02-24 00:16:15,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-24 00:16:15,546 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2021-02-24 00:16:15,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:16:15,555 INFO L225 Difference]: With dead ends: 149 [2021-02-24 00:16:15,556 INFO L226 Difference]: Without dead ends: 73 [2021-02-24 00:16:15,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 00:16:15,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-02-24 00:16:15,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-02-24 00:16:15,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-02-24 00:16:15,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2021-02-24 00:16:15,616 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 38 [2021-02-24 00:16:15,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:16:15,617 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2021-02-24 00:16:15,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-24 00:16:15,617 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2021-02-24 00:16:15,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-24 00:16:15,619 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:15,619 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:16:15,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 00:16:15,620 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:15,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:15,621 INFO L82 PathProgramCache]: Analyzing trace with hash -415145042, now seen corresponding path program 1 times [2021-02-24 00:16:15,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:15,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [813307468] [2021-02-24 00:16:15,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:15,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:15,773 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:15,775 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:15,777 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:15,780 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:15,793 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:15,795 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:16:15,809 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:15,811 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:15,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:16:15,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:15,897 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:15,898 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:15,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-24 00:16:15,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:15,941 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:15,943 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:15,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:16:15,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [813307468] [2021-02-24 00:16:15,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:16:15,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-24 00:16:15,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305150025] [2021-02-24 00:16:15,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-24 00:16:15,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:16:15,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-24 00:16:15,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-24 00:16:15,955 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 5 states. [2021-02-24 00:16:16,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:16:16,288 INFO L93 Difference]: Finished difference Result 147 states and 159 transitions. [2021-02-24 00:16:16,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-24 00:16:16,289 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2021-02-24 00:16:16,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:16:16,291 INFO L225 Difference]: With dead ends: 147 [2021-02-24 00:16:16,291 INFO L226 Difference]: Without dead ends: 107 [2021-02-24 00:16:16,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-24 00:16:16,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-02-24 00:16:16,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 76. [2021-02-24 00:16:16,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-02-24 00:16:16,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2021-02-24 00:16:16,310 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 38 [2021-02-24 00:16:16,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:16:16,310 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2021-02-24 00:16:16,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-24 00:16:16,311 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2021-02-24 00:16:16,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-02-24 00:16:16,313 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:16,313 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:16:16,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 00:16:16,314 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:16,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:16,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1781170039, now seen corresponding path program 1 times [2021-02-24 00:16:16,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:16,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865440981] [2021-02-24 00:16:16,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:16,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 00:16:16,377 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 00:16:16,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 00:16:16,442 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 00:16:16,484 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 00:16:16,484 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 00:16:16,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 00:16:16,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 12:16:16 BoogieIcfgContainer [2021-02-24 00:16:16,548 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 00:16:16,550 INFO L168 Benchmark]: Toolchain (without parser) took 2854.75 ms. Allocated memory is still 156.2 MB. Free memory was 133.2 MB in the beginning and 91.3 MB in the end (delta: 42.0 MB). Peak memory consumption was 43.2 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:16,550 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 156.2 MB. Free memory is still 131.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 00:16:16,551 INFO L168 Benchmark]: CACSL2BoogieTranslator took 356.47 ms. Allocated memory is still 156.2 MB. Free memory was 132.2 MB in the beginning and 122.0 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:16,553 INFO L168 Benchmark]: Boogie Preprocessor took 48.04 ms. Allocated memory is still 156.2 MB. Free memory was 122.0 MB in the beginning and 120.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:16,554 INFO L168 Benchmark]: RCFGBuilder took 719.00 ms. Allocated memory is still 156.2 MB. Free memory was 120.3 MB in the beginning and 132.0 MB in the end (delta: -11.8 MB). Peak memory consumption was 18.7 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:16,555 INFO L168 Benchmark]: TraceAbstraction took 1708.72 ms. Allocated memory is still 156.2 MB. Free memory was 131.5 MB in the beginning and 91.3 MB in the end (delta: 40.2 MB). Peak memory consumption was 40.2 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:16,564 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 156.2 MB. Free memory is still 131.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 356.47 ms. Allocated memory is still 156.2 MB. Free memory was 132.2 MB in the beginning and 122.0 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 48.04 ms. Allocated memory is still 156.2 MB. Free memory was 122.0 MB in the beginning and 120.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 719.00 ms. Allocated memory is still 156.2 MB. Free memory was 120.3 MB in the beginning and 132.0 MB in the end (delta: -11.8 MB). Peak memory consumption was 18.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1708.72 ms. Allocated memory is still 156.2 MB. Free memory was 131.5 MB in the beginning and 91.3 MB in the end (delta: 40.2 MB). Peak memory consumption was 40.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; VAL [\old(N)=51, N=0] [L23] N = __VERIFIER_nondet_int() VAL [\old(N)=0, __VERIFIER_nondet_int()=1, N=1] [L24] COND FALSE !(N <= 0) VAL [\old(N)=0, N=1] [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=1] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=1] [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=1] [L27] int i; VAL [\old(N)=0, N=1] [L28] long long sum[1]; VAL [\old(N)=0, N=1, sum={3:0}] [L29] int *a = malloc(sizeof(int)*N); VAL [\old(N)=0, a={-1:0}, malloc(sizeof(int)*N)={-1:0}, N=1, sum={3:0}] [L31] sum[0] = 1 VAL [\old(N)=0, a={-1:0}, malloc(sizeof(int)*N)={-1:0}, N=1, sum={3:0}] [L32] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=1, sum={3:0}] [L32] COND TRUE i