/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/res2of.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 00:16:06,903 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 00:16:06,906 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 00:16:06,956 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 00:16:07,001 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 00:16:07,004 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 00:16:07,007 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 00:16:07,009 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 00:16:07,013 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 00:16:07,014 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 00:16:07,021 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 00:16:07,031 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 00:16:07,033 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 00:16:07,036 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 00:16:07,038 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 00:16:07,040 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 00:16:07,049 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 00:16:07,065 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 00:16:07,089 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 00:16:07,089 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 00:16:07,094 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 00:16:07,094 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 00:16:07,094 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 00:16:07,095 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 00:16:07,095 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 00:16:07,095 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 00:16:07,095 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 00:16:07,096 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 00:16:07,097 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 00:16:07,097 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 00:16:07,097 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 00:16:07,098 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 00:16:07,098 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 00:16:07,099 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 00:16:07,099 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 00:16:07,099 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 00:16:07,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 00:16:07,100 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 00:16:07,100 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 00:16:07,100 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 00:16:07,100 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-24 00:16:07,487 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 00:16:07,528 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 00:16:07,531 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 00:16:07,533 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 00:16:07,534 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 00:16:07,535 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/res2of.c [2021-02-24 00:16:07,618 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe4159964/ea002d01666d4a3fa5f815205ed98501/FLAG49b3c6c1e [2021-02-24 00:16:08,294 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 00:16:08,295 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/res2of.c [2021-02-24 00:16:08,306 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe4159964/ea002d01666d4a3fa5f815205ed98501/FLAG49b3c6c1e [2021-02-24 00:16:08,668 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe4159964/ea002d01666d4a3fa5f815205ed98501 [2021-02-24 00:16:08,671 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 00:16:08,685 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 00:16:08,689 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 00:16:08,690 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 00:16:08,694 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 00:16:08,695 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:16:08" (1/1) ... [2021-02-24 00:16:08,696 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@483d983b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:08, skipping insertion in model container [2021-02-24 00:16:08,697 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:16:08" (1/1) ... [2021-02-24 00:16:08,706 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 00:16:08,727 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 00:16:08,929 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/res2of.c[589,602] [2021-02-24 00:16:08,958 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:16:08,967 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 00:16:08,985 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/res2of.c[589,602] [2021-02-24 00:16:09,023 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:16:09,053 INFO L208 MainTranslator]: Completed translation [2021-02-24 00:16:09,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:09 WrapperNode [2021-02-24 00:16:09,054 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 00:16:09,055 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 00:16:09,055 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 00:16:09,056 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 00:16:09,073 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:09" (1/1) ... [2021-02-24 00:16:09,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:09" (1/1) ... [2021-02-24 00:16:09,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:09" (1/1) ... [2021-02-24 00:16:09,095 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:09" (1/1) ... [2021-02-24 00:16:09,122 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:09" (1/1) ... [2021-02-24 00:16:09,137 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:09" (1/1) ... [2021-02-24 00:16:09,139 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:09" (1/1) ... [2021-02-24 00:16:09,145 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 00:16:09,150 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 00:16:09,150 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 00:16:09,150 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 00:16:09,151 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:09" (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 00:16:09,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 00:16:09,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 00:16:09,276 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 00:16:09,276 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-24 00:16:09,277 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 00:16:09,278 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 00:16:09,278 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 00:16:09,278 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 00:16:09,278 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 00:16:09,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 00:16:09,280 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-24 00:16:09,280 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 00:16:09,281 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 00:16:09,281 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-24 00:16:09,281 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 00:16:09,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-24 00:16:09,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 00:16:09,283 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 00:16:09,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 00:16:09,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 00:16:09,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 00:16:09,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 00:16:10,037 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 00:16:10,037 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-02-24 00:16:10,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:16:10 BoogieIcfgContainer [2021-02-24 00:16:10,039 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 00:16:10,041 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 00:16:10,041 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 00:16:10,045 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 00:16:10,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 12:16:08" (1/3) ... [2021-02-24 00:16:10,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ababe3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:16:10, skipping insertion in model container [2021-02-24 00:16:10,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:09" (2/3) ... [2021-02-24 00:16:10,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ababe3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:16:10, skipping insertion in model container [2021-02-24 00:16:10,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:16:10" (3/3) ... [2021-02-24 00:16:10,048 INFO L111 eAbstractionObserver]: Analyzing ICFG res2of.c [2021-02-24 00:16:10,056 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 00:16:10,061 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 00:16:10,080 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 00:16:10,107 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 00:16:10,107 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 00:16:10,107 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-24 00:16:10,107 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 00:16:10,108 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 00:16:10,108 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 00:16:10,108 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 00:16:10,108 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 00:16:10,126 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states. [2021-02-24 00:16:10,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-24 00:16:10,138 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:10,139 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] [2021-02-24 00:16:10,139 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:10,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:10,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1942755798, now seen corresponding path program 1 times [2021-02-24 00:16:10,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:10,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865824055] [2021-02-24 00:16:10,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:10,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:10,402 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:10,404 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:10,406 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:10,406 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:10,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:16:10,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:10,512 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:10,513 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:10,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-24 00:16:10,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:10,522 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:10,523 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:10,544 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 00:16:10,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865824055] [2021-02-24 00:16:10,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:16:10,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-24 00:16:10,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718512496] [2021-02-24 00:16:10,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-24 00:16:10,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:16:10,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-24 00:16:10,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 00:16:10,580 INFO L87 Difference]: Start difference. First operand 98 states. Second operand 3 states. [2021-02-24 00:16:11,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:16:11,020 INFO L93 Difference]: Finished difference Result 173 states and 200 transitions. [2021-02-24 00:16:11,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-24 00:16:11,022 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2021-02-24 00:16:11,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:16:11,033 INFO L225 Difference]: With dead ends: 173 [2021-02-24 00:16:11,033 INFO L226 Difference]: Without dead ends: 85 [2021-02-24 00:16:11,043 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 00:16:11,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-02-24 00:16:11,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-02-24 00:16:11,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-02-24 00:16:11,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 90 transitions. [2021-02-24 00:16:11,128 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 90 transitions. Word has length 48 [2021-02-24 00:16:11,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:16:11,129 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 90 transitions. [2021-02-24 00:16:11,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-24 00:16:11,130 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 90 transitions. [2021-02-24 00:16:11,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-24 00:16:11,132 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:11,132 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] [2021-02-24 00:16:11,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 00:16:11,133 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:11,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:11,134 INFO L82 PathProgramCache]: Analyzing trace with hash -569778108, now seen corresponding path program 1 times [2021-02-24 00:16:11,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:11,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040769216] [2021-02-24 00:16:11,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:11,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:11,213 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:11,214 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:11,216 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:11,216 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:11,229 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:11,230 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:16:11,243 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:11,244 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:11,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:16:11,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:11,316 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:11,317 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:11,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-24 00:16:11,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:11,325 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:11,326 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:11,339 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 00:16:11,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040769216] [2021-02-24 00:16:11,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:16:11,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-24 00:16:11,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228247528] [2021-02-24 00:16:11,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-24 00:16:11,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:16:11,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-24 00:16:11,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-24 00:16:11,346 INFO L87 Difference]: Start difference. First operand 85 states and 90 transitions. Second operand 5 states. [2021-02-24 00:16:11,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:16:11,765 INFO L93 Difference]: Finished difference Result 169 states and 184 transitions. [2021-02-24 00:16:11,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-24 00:16:11,766 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2021-02-24 00:16:11,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:16:11,769 INFO L225 Difference]: With dead ends: 169 [2021-02-24 00:16:11,769 INFO L226 Difference]: Without dead ends: 121 [2021-02-24 00:16:11,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-24 00:16:11,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-02-24 00:16:11,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 91. [2021-02-24 00:16:11,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-02-24 00:16:11,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 96 transitions. [2021-02-24 00:16:11,790 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 96 transitions. Word has length 48 [2021-02-24 00:16:11,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:16:11,791 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 96 transitions. [2021-02-24 00:16:11,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-24 00:16:11,791 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 96 transitions. [2021-02-24 00:16:11,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-02-24 00:16:11,794 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:11,795 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, 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 00:16:11,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 00:16:11,795 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:11,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:11,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1289191085, now seen corresponding path program 1 times [2021-02-24 00:16:11,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:11,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249003594] [2021-02-24 00:16:11,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:11,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 00:16:11,919 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 00:16:12,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 00:16:12,010 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 00:16:12,058 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 00:16:12,058 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 00:16:12,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 00:16:12,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 12:16:12 BoogieIcfgContainer [2021-02-24 00:16:12,171 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 00:16:12,173 INFO L168 Benchmark]: Toolchain (without parser) took 3499.49 ms. Allocated memory was 154.1 MB in the beginning and 201.3 MB in the end (delta: 47.2 MB). Free memory was 131.3 MB in the beginning and 133.7 MB in the end (delta: -2.4 MB). Peak memory consumption was 45.4 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:12,174 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 154.1 MB. Free memory was 126.6 MB in the beginning and 126.4 MB in the end (delta: 215.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 00:16:12,175 INFO L168 Benchmark]: CACSL2BoogieTranslator took 364.89 ms. Allocated memory is still 154.1 MB. Free memory was 130.3 MB in the beginning and 119.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:12,176 INFO L168 Benchmark]: Boogie Preprocessor took 92.54 ms. Allocated memory is still 154.1 MB. Free memory was 119.6 MB in the beginning and 117.7 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:12,177 INFO L168 Benchmark]: RCFGBuilder took 889.78 ms. Allocated memory is still 154.1 MB. Free memory was 117.7 MB in the beginning and 129.7 MB in the end (delta: -12.0 MB). Peak memory consumption was 20.1 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:12,178 INFO L168 Benchmark]: TraceAbstraction took 2130.66 ms. Allocated memory was 154.1 MB in the beginning and 201.3 MB in the end (delta: 47.2 MB). Free memory was 129.2 MB in the beginning and 133.7 MB in the end (delta: -4.5 MB). Peak memory consumption was 43.2 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:12,182 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 154.1 MB. Free memory was 126.6 MB in the beginning and 126.4 MB in the end (delta: 215.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 364.89 ms. Allocated memory is still 154.1 MB. Free memory was 130.3 MB in the beginning and 119.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 92.54 ms. Allocated memory is still 154.1 MB. Free memory was 119.6 MB in the beginning and 117.7 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 889.78 ms. Allocated memory is still 154.1 MB. Free memory was 117.7 MB in the beginning and 129.7 MB in the end (delta: -12.0 MB). Peak memory consumption was 20.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2130.66 ms. Allocated memory was 154.1 MB in the beginning and 201.3 MB in the end (delta: 47.2 MB). Free memory was 129.2 MB in the beginning and 133.7 MB in the end (delta: -4.5 MB). Peak memory consumption was 43.2 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={7:0}] [L29] int *a = malloc(sizeof(int)*N); VAL [\old(N)=0, a={-1:0}, malloc(sizeof(int)*N)={-1:0}, N=1, sum={7:0}] [L30] int *b = malloc(sizeof(int)*N); VAL [\old(N)=0, a={-1:0}, b={-2:0}, malloc(sizeof(int)*N)={-2:0}, malloc(sizeof(int)*N)={-1:0}, N=1, sum={7:0}] [L31] int *c = malloc(sizeof(int)*N); VAL [\old(N)=0, a={-1:0}, b={-2:0}, c={5:0}, malloc(sizeof(int)*N)={-2:0}, malloc(sizeof(int)*N)={5:0}, malloc(sizeof(int)*N)={-1:0}, N=1, sum={7:0}] [L33] sum[0] = 0 VAL [\old(N)=0, a={-1:0}, b={-2:0}, c={5:0}, malloc(sizeof(int)*N)={-2:0}, malloc(sizeof(int)*N)={5:0}, malloc(sizeof(int)*N)={-1:0}, N=1, sum={7:0}] [L34] i=0 VAL [\old(N)=0, a={-1:0}, b={-2:0}, c={5:0}, i=0, malloc(sizeof(int)*N)={-2:0}, malloc(sizeof(int)*N)={5:0}, malloc(sizeof(int)*N)={-1:0}, N=1, sum={7:0}] [L34] COND TRUE i