/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/eqn2f.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 02:23:24,149 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 02:23:24,152 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 02:23:24,189 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-24 02:23:24,203 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 02:23:24,204 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 02:23:24,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 02:23:24,207 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 02:23:24,208 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 02:23:24,210 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 02:23:24,227 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 02:23:24,234 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 02:23:24,240 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 02:23:24,248 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 02:23:24,250 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 02:23:24,251 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 02:23:24,257 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-24 02:23:24,277 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 02:23:24,278 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 02:23:24,279 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 02:23:24,280 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 02:23:24,305 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 02:23:24,306 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 02:23:24,311 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 02:23:24,311 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 02:23:24,311 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 02:23:24,311 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 02:23:24,312 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 02:23:24,312 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 02:23:24,312 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 02:23:24,312 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 02:23:24,313 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 02:23:24,314 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 02:23:24,314 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 02:23:24,314 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 02:23:24,315 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 02:23:24,315 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 02:23:24,315 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 02:23:24,316 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 02:23:24,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 02:23:24,316 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 02:23:24,316 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 02:23:24,316 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 02:23:24,317 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 02:23:24,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 02:23:24,791 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 02:23:24,794 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 02:23:24,797 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 02:23:24,797 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 02:23:24,798 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/eqn2f.c [2020-10-24 02:23:24,876 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d7bc7808/e6f30a67fb2549ce8c7596587e155de0/FLAGb6707bfc5 [2020-10-24 02:23:25,595 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 02:23:25,597 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/eqn2f.c [2020-10-24 02:23:25,605 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d7bc7808/e6f30a67fb2549ce8c7596587e155de0/FLAGb6707bfc5 [2020-10-24 02:23:25,930 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d7bc7808/e6f30a67fb2549ce8c7596587e155de0 [2020-10-24 02:23:25,934 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 02:23:25,941 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 02:23:25,947 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 02:23:25,948 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 02:23:25,952 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 02:23:25,953 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:23:25" (1/1) ... [2020-10-24 02:23:25,956 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11694c17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:25, skipping insertion in model container [2020-10-24 02:23:25,957 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:23:25" (1/1) ... [2020-10-24 02:23:25,965 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 02:23:25,980 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 02:23:26,148 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:23:26,159 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 02:23:26,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:23:26,200 INFO L208 MainTranslator]: Completed translation [2020-10-24 02:23:26,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:26 WrapperNode [2020-10-24 02:23:26,201 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 02:23:26,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 02:23:26,203 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 02:23:26,203 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 02:23:26,218 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:26" (1/1) ... [2020-10-24 02:23:26,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:26" (1/1) ... [2020-10-24 02:23:26,228 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:26" (1/1) ... [2020-10-24 02:23:26,229 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:26" (1/1) ... [2020-10-24 02:23:26,238 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:26" (1/1) ... [2020-10-24 02:23:26,243 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:26" (1/1) ... [2020-10-24 02:23:26,245 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:26" (1/1) ... [2020-10-24 02:23:26,248 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 02:23:26,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 02:23:26,249 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 02:23:26,250 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 02:23:26,251 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:26" (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 02:23:26,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 02:23:26,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 02:23:26,337 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 02:23:26,338 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-24 02:23:26,338 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-24 02:23:26,338 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 02:23:26,338 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 02:23:26,339 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 02:23:26,339 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 02:23:26,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 02:23:26,339 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-24 02:23:26,339 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-24 02:23:26,340 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-24 02:23:26,340 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-24 02:23:26,340 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 02:23:26,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-24 02:23:26,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 02:23:26,341 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 02:23:26,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 02:23:26,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 02:23:26,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 02:23:26,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 02:23:26,832 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 02:23:26,832 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-24 02:23:26,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:23:26 BoogieIcfgContainer [2020-10-24 02:23:26,834 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 02:23:26,836 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 02:23:26,837 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 02:23:26,841 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 02:23:26,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:23:25" (1/3) ... [2020-10-24 02:23:26,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cdbfe86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:23:26, skipping insertion in model container [2020-10-24 02:23:26,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:26" (2/3) ... [2020-10-24 02:23:26,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cdbfe86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:23:26, skipping insertion in model container [2020-10-24 02:23:26,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:23:26" (3/3) ... [2020-10-24 02:23:26,845 INFO L111 eAbstractionObserver]: Analyzing ICFG eqn2f.c [2020-10-24 02:23:26,859 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 02:23:26,865 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 02:23:26,881 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 02:23:26,906 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 02:23:26,907 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 02:23:26,907 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 02:23:26,907 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 02:23:26,907 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 02:23:26,907 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 02:23:26,908 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 02:23:26,908 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 02:23:26,925 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states. [2020-10-24 02:23:26,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-24 02:23:26,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:26,936 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] [2020-10-24 02:23:26,937 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:26,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:26,944 INFO L82 PathProgramCache]: Analyzing trace with hash 396138475, now seen corresponding path program 1 times [2020-10-24 02:23:26,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:26,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011776407] [2020-10-24 02:23:26,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:27,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:27,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:27,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:27,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-24 02:23:27,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:27,314 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 02:23:27,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011776407] [2020-10-24 02:23:27,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:23:27,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-24 02:23:27,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088879546] [2020-10-24 02:23:27,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-24 02:23:27,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:27,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-24 02:23:27,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-24 02:23:27,351 INFO L87 Difference]: Start difference. First operand 72 states. Second operand 3 states. [2020-10-24 02:23:27,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:27,678 INFO L93 Difference]: Finished difference Result 119 states and 135 transitions. [2020-10-24 02:23:27,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-24 02:23:27,681 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-10-24 02:23:27,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:27,690 INFO L225 Difference]: With dead ends: 119 [2020-10-24 02:23:27,691 INFO L226 Difference]: Without dead ends: 62 [2020-10-24 02:23:27,695 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 02:23:27,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-24 02:23:27,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-24 02:23:27,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-24 02:23:27,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-24 02:23:27,754 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 41 [2020-10-24 02:23:27,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:27,755 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-24 02:23:27,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-24 02:23:27,755 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-24 02:23:27,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-24 02:23:27,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:27,759 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] [2020-10-24 02:23:27,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 02:23:27,760 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:27,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:27,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1876757282, now seen corresponding path program 1 times [2020-10-24 02:23:27,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:27,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332537211] [2020-10-24 02:23:27,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:27,795 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-24 02:23:27,795 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-10-24 02:23:27,795 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 02:23:27,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 02:23:27,819 WARN L238 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-10-24 02:23:27,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:23:27 BoogieIcfgContainer [2020-10-24 02:23:27,819 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 02:23:27,822 INFO L168 Benchmark]: Toolchain (without parser) took 1884.63 ms. Allocated memory is still 151.0 MB. Free memory was 127.6 MB in the beginning and 82.7 MB in the end (delta: 45.0 MB). Peak memory consumption was 45.8 MB. Max. memory is 8.0 GB. [2020-10-24 02:23:27,823 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory was 125.5 MB in the beginning and 125.4 MB in the end (delta: 120.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-24 02:23:27,824 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.14 ms. Allocated memory is still 151.0 MB. Free memory was 127.0 MB in the beginning and 116.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-24 02:23:27,825 INFO L168 Benchmark]: Boogie Preprocessor took 45.96 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 115.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-24 02:23:27,826 INFO L168 Benchmark]: RCFGBuilder took 585.36 ms. Allocated memory is still 151.0 MB. Free memory was 115.1 MB in the beginning and 128.3 MB in the end (delta: -13.2 MB). Peak memory consumption was 17.5 MB. Max. memory is 8.0 GB. [2020-10-24 02:23:27,827 INFO L168 Benchmark]: TraceAbstraction took 983.02 ms. Allocated memory is still 151.0 MB. Free memory was 128.3 MB in the beginning and 82.7 MB in the end (delta: 45.6 MB). Peak memory consumption was 45.1 MB. Max. memory is 8.0 GB. [2020-10-24 02:23:27,831 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 was 125.5 MB in the beginning and 125.4 MB in the end (delta: 120.3 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 254.14 ms. Allocated memory is still 151.0 MB. Free memory was 127.0 MB in the beginning and 116.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 45.96 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 115.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 585.36 ms. Allocated memory is still 151.0 MB. Free memory was 115.1 MB in the beginning and 128.3 MB in the end (delta: -13.2 MB). Peak memory consumption was 17.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 983.02 ms. Allocated memory is still 151.0 MB. Free memory was 128.3 MB in the beginning and 82.7 MB in the end (delta: 45.6 MB). Peak memory consumption was 45.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 10]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] a[0] = 8 [L32] b[0] = 1 [L34] i=1 [L34] COND FALSE !(i