/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 0.2.0-7d8eed3 [2020-11-07 06:34:10,537 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 06:34:10,540 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 06:34:10,576 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 06:34:10,577 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 06:34:10,579 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 06:34:10,580 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 06:34:10,583 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 06:34:10,585 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 06:34:10,587 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 06:34:10,588 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 06:34:10,590 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 06:34:10,590 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 06:34:10,592 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 06:34:10,593 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 06:34:10,595 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 06:34:10,596 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 06:34:10,597 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 06:34:10,600 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 06:34:10,602 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 06:34:10,604 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 06:34:10,606 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 06:34:10,608 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 06:34:10,609 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 06:34:10,612 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 06:34:10,641 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 06:34:10,642 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 06:34:10,643 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 06:34:10,647 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 06:34:10,661 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 06:34:10,661 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 06:34:10,663 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 06:34:10,663 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 06:34:10,664 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 06:34:10,664 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 06:34:10,664 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 06:34:10,664 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 06:34:10,665 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 06:34:10,665 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 06:34:10,665 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 06:34:10,665 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 06:34:10,666 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 06:34:10,666 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 06:34:10,666 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 06:34:10,667 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 06:34:10,667 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 06:34:10,667 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 06:34:10,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 06:34:10,668 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 06:34:10,668 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 06:34:10,668 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 06:34:10,669 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 06:34:11,099 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 06:34:11,155 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 06:34:11,159 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 06:34:11,160 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 06:34:11,161 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 06:34:11,162 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/condnf.c [2020-11-07 06:34:11,249 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b91b52180/b6eb3016274749cbb45035d49f99334c/FLAG58a1691ea [2020-11-07 06:34:11,887 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 06:34:11,888 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/condnf.c [2020-11-07 06:34:11,896 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b91b52180/b6eb3016274749cbb45035d49f99334c/FLAG58a1691ea [2020-11-07 06:34:12,281 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b91b52180/b6eb3016274749cbb45035d49f99334c [2020-11-07 06:34:12,284 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 06:34:12,293 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 06:34:12,297 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 06:34:12,298 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 06:34:12,302 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 06:34:12,303 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:34:12" (1/1) ... [2020-11-07 06:34:12,308 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e0e94b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:12, skipping insertion in model container [2020-11-07 06:34:12,308 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:34:12" (1/1) ... [2020-11-07 06:34:12,319 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 06:34:12,339 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 06:34:12,595 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:34:12,606 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 06:34:12,644 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:34:12,662 INFO L208 MainTranslator]: Completed translation [2020-11-07 06:34:12,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:12 WrapperNode [2020-11-07 06:34:12,662 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 06:34:12,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 06:34:12,664 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 06:34:12,664 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 06:34:12,678 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:12" (1/1) ... [2020-11-07 06:34:12,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:12" (1/1) ... [2020-11-07 06:34:12,686 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:12" (1/1) ... [2020-11-07 06:34:12,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:12" (1/1) ... [2020-11-07 06:34:12,695 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:12" (1/1) ... [2020-11-07 06:34:12,701 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:12" (1/1) ... [2020-11-07 06:34:12,702 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:12" (1/1) ... [2020-11-07 06:34:12,705 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 06:34:12,706 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 06:34:12,706 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 06:34:12,706 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 06:34:12,707 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:12" (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 [2020-11-07 06:34:12,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 06:34:12,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 06:34:12,781 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 06:34:12,781 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-07 06:34:12,781 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 06:34:12,781 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 06:34:12,782 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 06:34:12,782 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 06:34:12,782 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 06:34:12,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 06:34:12,782 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-07 06:34:12,783 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 06:34:12,783 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 06:34:12,783 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-07 06:34:12,783 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 06:34:12,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-07 06:34:12,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 06:34:12,784 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 06:34:12,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 06:34:12,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 06:34:12,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 06:34:12,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 06:34:13,125 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 06:34:13,126 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-11-07 06:34:13,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:34:13 BoogieIcfgContainer [2020-11-07 06:34:13,128 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 06:34:13,130 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 06:34:13,130 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 06:34:13,134 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 06:34:13,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:34:12" (1/3) ... [2020-11-07 06:34:13,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6affae6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:34:13, skipping insertion in model container [2020-11-07 06:34:13,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:12" (2/3) ... [2020-11-07 06:34:13,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6affae6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:34:13, skipping insertion in model container [2020-11-07 06:34:13,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:34:13" (3/3) ... [2020-11-07 06:34:13,138 INFO L111 eAbstractionObserver]: Analyzing ICFG condnf.c [2020-11-07 06:34:13,156 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 06:34:13,159 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 06:34:13,173 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 06:34:13,201 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 06:34:13,201 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 06:34:13,202 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 06:34:13,202 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 06:34:13,202 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 06:34:13,202 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 06:34:13,202 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 06:34:13,203 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 06:34:13,221 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states. [2020-11-07 06:34:13,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-07 06:34:13,232 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:13,233 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] [2020-11-07 06:34:13,233 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:13,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:13,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1069845025, now seen corresponding path program 1 times [2020-11-07 06:34:13,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:13,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919550846] [2020-11-07 06:34:13,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:13,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:13,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:13,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:13,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-07 06:34:13,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:13,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:34:13,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919550846] [2020-11-07 06:34:13,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:34:13,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 06:34:13,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757442911] [2020-11-07 06:34:13,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 06:34:13,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:13,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 06:34:13,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 06:34:13,652 INFO L87 Difference]: Start difference. First operand 71 states. Second operand 3 states. [2020-11-07 06:34:13,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:13,898 INFO L93 Difference]: Finished difference Result 117 states and 135 transitions. [2020-11-07 06:34:13,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 06:34:13,900 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-11-07 06:34:13,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:13,909 INFO L225 Difference]: With dead ends: 117 [2020-11-07 06:34:13,909 INFO L226 Difference]: Without dead ends: 61 [2020-11-07 06:34:13,913 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 [2020-11-07 06:34:13,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-11-07 06:34:13,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-11-07 06:34:13,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-07 06:34:13,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-11-07 06:34:13,968 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 37 [2020-11-07 06:34:13,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:13,969 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-11-07 06:34:13,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 06:34:13,969 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-11-07 06:34:13,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-07 06:34:13,971 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:13,971 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] [2020-11-07 06:34:13,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 06:34:13,972 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:13,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:13,973 INFO L82 PathProgramCache]: Analyzing trace with hash -638526506, now seen corresponding path program 1 times [2020-11-07 06:34:13,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:13,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1300210065] [2020-11-07 06:34:13,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:14,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:14,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:14,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:14,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-07 06:34:14,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:14,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:34:14,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1300210065] [2020-11-07 06:34:14,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:34:14,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 06:34:14,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910387947] [2020-11-07 06:34:14,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 06:34:14,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:14,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 06:34:14,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-07 06:34:14,126 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 5 states. [2020-11-07 06:34:14,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:14,388 INFO L93 Difference]: Finished difference Result 112 states and 121 transitions. [2020-11-07 06:34:14,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 06:34:14,389 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-11-07 06:34:14,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:14,393 INFO L225 Difference]: With dead ends: 112 [2020-11-07 06:34:14,393 INFO L226 Difference]: Without dead ends: 84 [2020-11-07 06:34:14,394 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 [2020-11-07 06:34:14,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-11-07 06:34:14,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 63. [2020-11-07 06:34:14,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-07 06:34:14,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2020-11-07 06:34:14,415 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 37 [2020-11-07 06:34:14,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:14,416 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2020-11-07 06:34:14,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 06:34:14,416 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2020-11-07 06:34:14,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-07 06:34:14,418 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:14,418 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] [2020-11-07 06:34:14,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 06:34:14,419 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:14,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:14,420 INFO L82 PathProgramCache]: Analyzing trace with hash 958524627, now seen corresponding path program 1 times [2020-11-07 06:34:14,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:14,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372546522] [2020-11-07 06:34:14,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:14,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:14,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:14,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:14,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-07 06:34:14,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:14,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-07 06:34:14,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372546522] [2020-11-07 06:34:14,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:14,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-11-07 06:34:14,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791484500] [2020-11-07 06:34:14,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-07 06:34:14,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:14,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-07 06:34:14,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-11-07 06:34:14,793 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 11 states. [2020-11-07 06:34:15,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:15,271 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2020-11-07 06:34:15,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-07 06:34:15,272 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-11-07 06:34:15,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:15,274 INFO L225 Difference]: With dead ends: 118 [2020-11-07 06:34:15,274 INFO L226 Difference]: Without dead ends: 115 [2020-11-07 06:34:15,275 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 [2020-11-07 06:34:15,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-11-07 06:34:15,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 79. [2020-11-07 06:34:15,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-07 06:34:15,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2020-11-07 06:34:15,296 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 52 [2020-11-07 06:34:15,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:15,297 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2020-11-07 06:34:15,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-07 06:34:15,297 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2020-11-07 06:34:15,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-11-07 06:34:15,299 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:15,299 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] [2020-11-07 06:34:15,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 06:34:15,300 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:15,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:15,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1068131854, now seen corresponding path program 1 times [2020-11-07 06:34:15,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:15,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851476715] [2020-11-07 06:34:15,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:15,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 06:34:15,336 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 06:34:15,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 06:34:15,393 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 06:34:15,428 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 06:34:15,429 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 06:34:15,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 06:34:15,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:34:15 BoogieIcfgContainer [2020-11-07 06:34:15,511 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 06:34:15,517 INFO L168 Benchmark]: Toolchain (without parser) took 3228.45 ms. Allocated memory was 151.0 MB in the beginning and 187.7 MB in the end (delta: 36.7 MB). Free memory was 126.7 MB in the beginning and 164.2 MB in the end (delta: -37.6 MB). Peak memory consumption was 79.4 MB. Max. memory is 8.0 GB. [2020-11-07 06:34:15,518 INFO L168 Benchmark]: CDTParser took 1.09 ms. Allocated memory is still 151.0 MB. Free memory was 125.6 MB in the beginning and 125.2 MB in the end (delta: 435.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 06:34:15,519 INFO L168 Benchmark]: CACSL2BoogieTranslator took 365.26 ms. Allocated memory is still 151.0 MB. Free memory was 125.8 MB in the beginning and 116.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-07 06:34:15,520 INFO L168 Benchmark]: Boogie Preprocessor took 41.73 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 114.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-07 06:34:15,523 INFO L168 Benchmark]: RCFGBuilder took 422.30 ms. Allocated memory is still 151.0 MB. Free memory was 114.6 MB in the beginning and 96.1 MB in the end (delta: 18.6 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. [2020-11-07 06:34:15,524 INFO L168 Benchmark]: TraceAbstraction took 2381.71 ms. Allocated memory was 151.0 MB in the beginning and 187.7 MB in the end (delta: 36.7 MB). Free memory was 95.4 MB in the beginning and 164.7 MB in the end (delta: -69.3 MB). Peak memory consumption was 47.9 MB. Max. memory is 8.0 GB. [2020-11-07 06:34:15,528 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.09 ms. Allocated memory is still 151.0 MB. Free memory was 125.6 MB in the beginning and 125.2 MB in the end (delta: 435.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 365.26 ms. Allocated memory is still 151.0 MB. Free memory was 125.8 MB in the beginning and 116.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.73 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 114.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 422.30 ms. Allocated memory is still 151.0 MB. Free memory was 114.6 MB in the beginning and 96.1 MB in the end (delta: 18.6 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2381.71 ms. Allocated memory was 151.0 MB in the beginning and 187.7 MB in the end (delta: 36.7 MB). Free memory was 95.4 MB in the beginning and 164.7 MB in the end (delta: -69.3 MB). Peak memory consumption was 47.9 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