/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/condnf.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 02:23:21,237 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 02:23:21,242 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 02:23:21,289 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-24 02:23:21,325 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 02:23:21,328 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 02:23:21,329 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 02:23:21,331 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 02:23:21,332 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 02:23:21,335 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 02:23:21,341 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 02:23:21,348 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 02:23:21,350 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 02:23:21,351 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 02:23:21,353 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 02:23:21,355 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 02:23:21,362 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-24 02:23:21,373 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 02:23:21,373 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 02:23:21,374 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 02:23:21,375 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-24 02:23:21,399 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 02:23:21,399 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 02:23:21,404 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 02:23:21,404 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 02:23:21,405 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 02:23:21,405 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 02:23:21,405 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 02:23:21,405 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 02:23:21,405 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 02:23:21,406 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 02:23:21,407 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 02:23:21,407 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 02:23:21,407 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 02:23:21,408 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 02:23:21,408 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 02:23:21,408 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 02:23:21,408 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 02:23:21,408 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 02:23:21,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 02:23:21,409 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 02:23:21,409 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 02:23:21,409 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 02:23:21,409 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 02:23:21,780 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 02:23:21,804 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 02:23:21,807 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 02:23:21,808 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 02:23:21,809 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 02:23:21,810 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/condnf.c [2020-10-24 02:23:21,890 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ce004219/fb6e549af433406f880062b17c8751c3/FLAG5048f8b8e [2020-10-24 02:23:22,534 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 02:23:22,535 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/condnf.c [2020-10-24 02:23:22,543 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ce004219/fb6e549af433406f880062b17c8751c3/FLAG5048f8b8e [2020-10-24 02:23:22,880 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ce004219/fb6e549af433406f880062b17c8751c3 [2020-10-24 02:23:22,883 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 02:23:22,889 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 02:23:22,891 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 02:23:22,891 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 02:23:22,895 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 02:23:22,896 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:23:22" (1/1) ... [2020-10-24 02:23:22,903 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@263e2936 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:22, skipping insertion in model container [2020-10-24 02:23:22,903 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:23:22" (1/1) ... [2020-10-24 02:23:22,912 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 02:23:22,927 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 02:23:23,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:23:23,104 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 02:23:23,124 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:23:23,141 INFO L208 MainTranslator]: Completed translation [2020-10-24 02:23:23,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:23 WrapperNode [2020-10-24 02:23:23,142 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 02:23:23,143 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 02:23:23,143 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 02:23:23,143 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 02:23:23,155 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:23" (1/1) ... [2020-10-24 02:23:23,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:23" (1/1) ... [2020-10-24 02:23:23,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:23" (1/1) ... [2020-10-24 02:23:23,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:23" (1/1) ... [2020-10-24 02:23:23,172 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:23" (1/1) ... [2020-10-24 02:23:23,177 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:23" (1/1) ... [2020-10-24 02:23:23,179 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:23" (1/1) ... [2020-10-24 02:23:23,181 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 02:23:23,185 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 02:23:23,185 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 02:23:23,185 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 02:23:23,188 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:23" (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 [2020-10-24 02:23:23,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 02:23:23,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 02:23:23,271 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 02:23:23,271 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-24 02:23:23,271 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-24 02:23:23,271 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 02:23:23,271 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 02:23:23,272 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 02:23:23,272 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 02:23:23,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 02:23:23,272 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-24 02:23:23,272 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-24 02:23:23,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-24 02:23:23,273 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-24 02:23:23,273 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 02:23:23,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-24 02:23:23,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 02:23:23,274 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 02:23:23,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 02:23:23,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 02:23:23,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 02:23:23,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 02:23:23,623 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 02:23:23,623 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-24 02:23:23,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:23:23 BoogieIcfgContainer [2020-10-24 02:23:23,625 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 02:23:23,627 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 02:23:23,627 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 02:23:23,631 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 02:23:23,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:23:22" (1/3) ... [2020-10-24 02:23:23,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@854cf18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:23:23, skipping insertion in model container [2020-10-24 02:23:23,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:23" (2/3) ... [2020-10-24 02:23:23,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@854cf18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:23:23, skipping insertion in model container [2020-10-24 02:23:23,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:23:23" (3/3) ... [2020-10-24 02:23:23,634 INFO L111 eAbstractionObserver]: Analyzing ICFG condnf.c [2020-10-24 02:23:23,646 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 02:23:23,652 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 02:23:23,667 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 02:23:23,692 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 02:23:23,692 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 02:23:23,692 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 02:23:23,692 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 02:23:23,693 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 02:23:23,693 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 02:23:23,693 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 02:23:23,693 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 02:23:23,729 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states. [2020-10-24 02:23:23,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-24 02:23:23,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:23,742 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] [2020-10-24 02:23:23,742 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:23,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:23,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1069845025, now seen corresponding path program 1 times [2020-10-24 02:23:23,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:23,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060854593] [2020-10-24 02:23:23,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:24,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:24,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:24,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:24,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-24 02:23:24,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:24,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:23:24,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060854593] [2020-10-24 02:23:24,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:23:24,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-24 02:23:24,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752114934] [2020-10-24 02:23:24,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-24 02:23:24,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:24,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-24 02:23:24,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-24 02:23:24,256 INFO L87 Difference]: Start difference. First operand 71 states. Second operand 3 states. [2020-10-24 02:23:24,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:24,438 INFO L93 Difference]: Finished difference Result 117 states and 135 transitions. [2020-10-24 02:23:24,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-24 02:23:24,440 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-10-24 02:23:24,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:24,450 INFO L225 Difference]: With dead ends: 117 [2020-10-24 02:23:24,450 INFO L226 Difference]: Without dead ends: 61 [2020-10-24 02:23:24,454 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 [2020-10-24 02:23:24,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-24 02:23:24,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-24 02:23:24,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-24 02:23:24,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-10-24 02:23:24,510 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 37 [2020-10-24 02:23:24,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:24,511 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-10-24 02:23:24,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-24 02:23:24,512 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-10-24 02:23:24,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-24 02:23:24,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:24,514 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] [2020-10-24 02:23:24,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 02:23:24,514 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:24,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:24,516 INFO L82 PathProgramCache]: Analyzing trace with hash -638526506, now seen corresponding path program 1 times [2020-10-24 02:23:24,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:24,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223148018] [2020-10-24 02:23:24,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:24,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:24,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:24,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:24,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-24 02:23:24,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:24,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:23:24,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223148018] [2020-10-24 02:23:24,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:23:24,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-24 02:23:24,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556765145] [2020-10-24 02:23:24,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-24 02:23:24,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:24,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-24 02:23:24,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:23:24,767 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 5 states. [2020-10-24 02:23:25,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:25,057 INFO L93 Difference]: Finished difference Result 112 states and 121 transitions. [2020-10-24 02:23:25,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 02:23:25,057 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-10-24 02:23:25,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:25,061 INFO L225 Difference]: With dead ends: 112 [2020-10-24 02:23:25,061 INFO L226 Difference]: Without dead ends: 84 [2020-10-24 02:23:25,063 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 [2020-10-24 02:23:25,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-24 02:23:25,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 63. [2020-10-24 02:23:25,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-24 02:23:25,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2020-10-24 02:23:25,082 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 37 [2020-10-24 02:23:25,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:25,083 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2020-10-24 02:23:25,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-24 02:23:25,083 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2020-10-24 02:23:25,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-24 02:23:25,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:25,085 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] [2020-10-24 02:23:25,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 02:23:25,086 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:25,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:25,087 INFO L82 PathProgramCache]: Analyzing trace with hash 958524627, now seen corresponding path program 1 times [2020-10-24 02:23:25,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:25,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353833088] [2020-10-24 02:23:25,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:25,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:25,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:25,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:25,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-24 02:23:25,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:25,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-24 02:23:25,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353833088] [2020-10-24 02:23:25,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:23:25,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-24 02:23:25,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078721989] [2020-10-24 02:23:25,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-24 02:23:25,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:25,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-24 02:23:25,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-24 02:23:25,380 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 11 states. [2020-10-24 02:23:25,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:25,868 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2020-10-24 02:23:25,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-24 02:23:25,869 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-10-24 02:23:25,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:25,871 INFO L225 Difference]: With dead ends: 118 [2020-10-24 02:23:25,871 INFO L226 Difference]: Without dead ends: 115 [2020-10-24 02:23:25,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2020-10-24 02:23:25,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-24 02:23:25,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 79. [2020-10-24 02:23:25,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-24 02:23:25,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2020-10-24 02:23:25,891 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 52 [2020-10-24 02:23:25,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:25,891 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2020-10-24 02:23:25,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-24 02:23:25,892 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2020-10-24 02:23:25,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-24 02:23:25,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:25,898 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] [2020-10-24 02:23:25,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 02:23:25,898 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:25,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:25,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1068131854, now seen corresponding path program 1 times [2020-10-24 02:23:25,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:25,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746785292] [2020-10-24 02:23:25,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:25,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 02:23:25,959 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 02:23:26,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 02:23:26,002 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 02:23:26,042 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-24 02:23:26,042 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 02:23:26,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 02:23:26,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:23:26 BoogieIcfgContainer [2020-10-24 02:23:26,136 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 02:23:26,145 INFO L168 Benchmark]: Toolchain (without parser) took 3254.37 ms. Allocated memory was 151.0 MB in the beginning and 203.4 MB in the end (delta: 52.4 MB). Free memory was 127.2 MB in the beginning and 149.7 MB in the end (delta: -22.5 MB). Peak memory consumption was 30.9 MB. Max. memory is 8.0 GB. [2020-10-24 02:23:26,145 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 124.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-24 02:23:26,146 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.77 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 116.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-24 02:23:26,147 INFO L168 Benchmark]: Boogie Preprocessor took 38.52 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 115.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-24 02:23:26,149 INFO L168 Benchmark]: RCFGBuilder took 440.24 ms. Allocated memory is still 151.0 MB. Free memory was 115.0 MB in the beginning and 131.0 MB in the end (delta: -15.9 MB). Peak memory consumption was 20.8 MB. Max. memory is 8.0 GB. [2020-10-24 02:23:26,151 INFO L168 Benchmark]: TraceAbstraction took 2508.62 ms. Allocated memory was 151.0 MB in the beginning and 203.4 MB in the end (delta: 52.4 MB). Free memory was 130.4 MB in the beginning and 149.7 MB in the end (delta: -19.2 MB). Peak memory consumption was 33.2 MB. Max. memory is 8.0 GB. [2020-10-24 02:23:26,158 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 124.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 250.77 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 116.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.52 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 115.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 440.24 ms. Allocated memory is still 151.0 MB. Free memory was 115.0 MB in the beginning and 131.0 MB in the end (delta: -15.9 MB). Peak memory consumption was 20.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2508.62 ms. Allocated memory was 151.0 MB in the beginning and 203.4 MB in the end (delta: 52.4 MB). Free memory was 130.4 MB in the beginning and 149.7 MB in the end (delta: -19.2 MB). Peak memory consumption was 33.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_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] int *a = malloc(sizeof(int)*N); VAL [\old(N)=0, a={-1:0}, malloc(sizeof(int)*N)={-1:0}, N=1] [L30] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=1] [L30] COND TRUE i N VAL [\old(N)=0, a={-1:0}, a[i]=8, i=0, malloc(sizeof(int)*N)={-1:0}, N=1] [L38] EXPR a[i] VAL [\old(N)=0, a={-1:0}, a[i]=8, i=0, malloc(sizeof(int)*N)={-1:0}, N=1] [L38] a[i] = a[i] VAL [\old(N)=0, a={-1:0}, a[i]=8, i=0, malloc(sizeof(int)*N)={-1:0}, N=1] [L35] i++ VAL [\old(N)=0, a={-1:0}, i=1, malloc(sizeof(int)*N)={-1:0}, N=1] [L35] COND FALSE !(i