/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/array-fpi/s4iff.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 21:45:23,576 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 21:45:23,579 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 21:45:23,614 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 21:45:23,615 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 21:45:23,617 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 21:45:23,618 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 21:45:23,621 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 21:45:23,623 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 21:45:23,624 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 21:45:23,626 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 21:45:23,627 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 21:45:23,628 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 21:45:23,629 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 21:45:23,631 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 21:45:23,632 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 21:45:23,633 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 21:45:23,634 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 21:45:23,636 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 21:45:23,639 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 21:45:23,641 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 21:45:23,643 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 21:45:23,644 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 21:45:23,645 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 21:45:23,649 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 21:45:23,672 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 21:45:23,673 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 21:45:23,674 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 21:45:23,677 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 21:45:23,699 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 21:45:23,700 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 21:45:23,702 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 21:45:23,703 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 21:45:23,704 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 21:45:23,704 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 21:45:23,705 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 21:45:23,705 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 21:45:23,705 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 21:45:23,705 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 21:45:23,706 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 21:45:23,707 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 21:45:23,707 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 21:45:23,707 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 21:45:23,707 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 21:45:23,707 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 21:45:23,708 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 21:45:23,708 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 21:45:23,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 21:45:23,708 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 21:45:23,708 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 21:45:23,709 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 21:45:23,709 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 21:45:24,145 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 21:45:24,176 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 21:45:24,180 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 21:45:24,182 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 21:45:24,182 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 21:45:24,183 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s4iff.c [2020-10-23 21:45:24,281 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff256aae5/046a68b0d8604f19be694ce5d902a8df/FLAG38a6955fe [2020-10-23 21:45:25,039 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 21:45:25,039 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s4iff.c [2020-10-23 21:45:25,048 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff256aae5/046a68b0d8604f19be694ce5d902a8df/FLAG38a6955fe [2020-10-23 21:45:25,373 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff256aae5/046a68b0d8604f19be694ce5d902a8df [2020-10-23 21:45:25,377 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 21:45:25,384 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 21:45:25,387 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 21:45:25,387 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 21:45:25,394 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 21:45:25,395 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:45:25" (1/1) ... [2020-10-23 21:45:25,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78e5d047 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:25, skipping insertion in model container [2020-10-23 21:45:25,399 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:45:25" (1/1) ... [2020-10-23 21:45:25,408 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 21:45:25,425 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 21:45:25,617 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:45:25,627 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 21:45:25,653 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:45:25,672 INFO L208 MainTranslator]: Completed translation [2020-10-23 21:45:25,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:25 WrapperNode [2020-10-23 21:45:25,673 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 21:45:25,675 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 21:45:25,675 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 21:45:25,675 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 21:45:25,690 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:25" (1/1) ... [2020-10-23 21:45:25,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:25" (1/1) ... [2020-10-23 21:45:25,700 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:25" (1/1) ... [2020-10-23 21:45:25,700 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:25" (1/1) ... [2020-10-23 21:45:25,712 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:25" (1/1) ... [2020-10-23 21:45:25,723 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:25" (1/1) ... [2020-10-23 21:45:25,725 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:25" (1/1) ... [2020-10-23 21:45:25,730 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 21:45:25,731 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 21:45:25,731 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 21:45:25,731 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 21:45:25,734 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:25" (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 [2020-10-23 21:45:25,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 21:45:25,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 21:45:25,837 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 21:45:25,837 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 21:45:25,838 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 21:45:25,838 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 21:45:25,838 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 21:45:25,838 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 21:45:25,838 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 21:45:25,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 21:45:25,839 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 21:45:25,839 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 21:45:25,840 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 21:45:25,840 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-23 21:45:25,840 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 21:45:25,840 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-23 21:45:25,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 21:45:25,841 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 21:45:25,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 21:45:25,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 21:45:25,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 21:45:25,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 21:45:26,425 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 21:45:26,426 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-23 21:45:26,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:45:26 BoogieIcfgContainer [2020-10-23 21:45:26,428 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 21:45:26,430 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 21:45:26,430 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 21:45:26,434 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 21:45:26,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 09:45:25" (1/3) ... [2020-10-23 21:45:26,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@710115a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:45:26, skipping insertion in model container [2020-10-23 21:45:26,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:25" (2/3) ... [2020-10-23 21:45:26,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@710115a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:45:26, skipping insertion in model container [2020-10-23 21:45:26,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:45:26" (3/3) ... [2020-10-23 21:45:26,438 INFO L111 eAbstractionObserver]: Analyzing ICFG s4iff.c [2020-10-23 21:45:26,453 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 21:45:26,460 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 21:45:26,474 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 21:45:26,503 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 21:45:26,503 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 21:45:26,503 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 21:45:26,504 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 21:45:26,504 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 21:45:26,504 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 21:45:26,504 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 21:45:26,504 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 21:45:26,523 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states. [2020-10-23 21:45:26,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-23 21:45:26,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:45:26,536 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] [2020-10-23 21:45:26,536 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:45:26,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:45:26,544 INFO L82 PathProgramCache]: Analyzing trace with hash -109308390, now seen corresponding path program 1 times [2020-10-23 21:45:26,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:45:26,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187708368] [2020-10-23 21:45:26,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:45:26,646 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:45:26,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:26,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:45:27,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:27,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-23 21:45:27,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:27,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:45:27,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187708368] [2020-10-23 21:45:27,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:45:27,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 21:45:27,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278333908] [2020-10-23 21:45:27,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 21:45:27,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:45:27,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 21:45:27,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-23 21:45:27,085 INFO L87 Difference]: Start difference. First operand 74 states. Second operand 5 states. [2020-10-23 21:45:27,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:45:27,576 INFO L93 Difference]: Finished difference Result 148 states and 166 transitions. [2020-10-23 21:45:27,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 21:45:27,578 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-10-23 21:45:27,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:45:27,589 INFO L225 Difference]: With dead ends: 148 [2020-10-23 21:45:27,590 INFO L226 Difference]: Without dead ends: 80 [2020-10-23 21:45:27,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-23 21:45:27,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-23 21:45:27,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 61. [2020-10-23 21:45:27,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-23 21:45:27,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2020-10-23 21:45:27,662 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 37 [2020-10-23 21:45:27,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:45:27,662 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2020-10-23 21:45:27,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 21:45:27,663 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2020-10-23 21:45:27,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-23 21:45:27,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:45:27,665 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] [2020-10-23 21:45:27,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 21:45:27,666 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:45:27,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:45:27,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1788289630, now seen corresponding path program 1 times [2020-10-23 21:45:27,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:45:27,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822551748] [2020-10-23 21:45:27,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:45:27,791 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:45:27,793 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:45:27,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:28,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:45:28,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:28,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-23 21:45:28,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:28,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:45:28,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822551748] [2020-10-23 21:45:28,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:45:28,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-10-23 21:45:28,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559388494] [2020-10-23 21:45:28,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-23 21:45:28,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:45:28,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-23 21:45:28,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2020-10-23 21:45:28,505 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 20 states. [2020-10-23 21:45:30,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:45:30,355 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2020-10-23 21:45:30,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-23 21:45:30,358 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 54 [2020-10-23 21:45:30,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:45:30,367 INFO L225 Difference]: With dead ends: 114 [2020-10-23 21:45:30,368 INFO L226 Difference]: Without dead ends: 107 [2020-10-23 21:45:30,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=318, Invalid=1242, Unknown=0, NotChecked=0, Total=1560 [2020-10-23 21:45:30,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-23 21:45:30,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 79. [2020-10-23 21:45:30,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-23 21:45:30,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2020-10-23 21:45:30,422 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 54 [2020-10-23 21:45:30,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:45:30,424 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2020-10-23 21:45:30,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-23 21:45:30,424 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2020-10-23 21:45:30,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-23 21:45:30,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:45:30,429 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] [2020-10-23 21:45:30,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 21:45:30,432 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:45:30,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:45:30,433 INFO L82 PathProgramCache]: Analyzing trace with hash 856266086, now seen corresponding path program 1 times [2020-10-23 21:45:30,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:45:30,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [710675097] [2020-10-23 21:45:30,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:45:30,517 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:45:30,521 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:45:30,547 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-10-23 21:45:30,547 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 21:45:30,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 21:45:30,572 WARN L238 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-10-23 21:45:30,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 09:45:30 BoogieIcfgContainer [2020-10-23 21:45:30,572 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 21:45:30,575 INFO L168 Benchmark]: Toolchain (without parser) took 5195.31 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 127.8 MB in the beginning and 103.7 MB in the end (delta: 24.1 MB). Peak memory consumption was 55.6 MB. Max. memory is 8.0 GB. [2020-10-23 21:45:30,577 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 125.8 MB. Free memory was 101.5 MB in the beginning and 101.5 MB in the end (delta: 68.4 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 21:45:30,577 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.96 ms. Allocated memory is still 151.0 MB. Free memory was 127.2 MB in the beginning and 116.8 MB in the end (delta: 10.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 21:45:30,578 INFO L168 Benchmark]: Boogie Preprocessor took 55.60 ms. Allocated memory is still 151.0 MB. Free memory was 116.8 MB in the beginning and 115.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 21:45:30,579 INFO L168 Benchmark]: RCFGBuilder took 697.18 ms. Allocated memory is still 151.0 MB. Free memory was 115.2 MB in the beginning and 129.0 MB in the end (delta: -13.8 MB). Peak memory consumption was 17.2 MB. Max. memory is 8.0 GB. [2020-10-23 21:45:30,580 INFO L168 Benchmark]: TraceAbstraction took 4142.60 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 128.6 MB in the beginning and 103.7 MB in the end (delta: 24.9 MB). Peak memory consumption was 55.2 MB. Max. memory is 8.0 GB. [2020-10-23 21:45:30,590 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 125.8 MB. Free memory was 101.5 MB in the beginning and 101.5 MB in the end (delta: 68.4 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 286.96 ms. Allocated memory is still 151.0 MB. Free memory was 127.2 MB in the beginning and 116.8 MB in the end (delta: 10.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 55.60 ms. Allocated memory is still 151.0 MB. Free memory was 116.8 MB in the beginning and 115.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 697.18 ms. Allocated memory is still 151.0 MB. Free memory was 115.2 MB in the beginning and 129.0 MB in the end (delta: -13.8 MB). Peak memory consumption was 17.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4142.60 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 128.6 MB in the beginning and 103.7 MB in the end (delta: 24.9 MB). Peak memory consumption was 55.2 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 sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 1 [L32] i=0 [L32] COND TRUE i