/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/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/array-fpi/nsqm-iff.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 02:20:13,406 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 02:20:13,411 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 02:20:13,470 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 02:20:13,510 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 02:20:13,512 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 02:20:13,514 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 02:20:13,516 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 02:20:13,520 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 02:20:13,521 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 02:20:13,528 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 02:20:13,536 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 02:20:13,538 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 02:20:13,542 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 02:20:13,544 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 02:20:13,545 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 02:20:13,547 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 02:20:13,556 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 02:20:13,557 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 02:20:13,558 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 02:20:13,559 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-22 02:20:13,571 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 02:20:13,572 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 02:20:13,573 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 02:20:13,573 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 02:20:13,574 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 02:20:13,574 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 02:20:13,574 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 02:20:13,574 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 02:20:13,574 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 02:20:13,575 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 02:20:13,575 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 02:20:13,575 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 02:20:13,575 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 02:20:13,575 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 02:20:13,576 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 02:20:13,576 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 02:20:13,576 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 02:20:13,576 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 02:20:13,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:20:13,577 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 02:20:13,577 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 02:20:13,577 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 02:20:13,577 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 02:20:13,578 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 02:20:13,940 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 02:20:13,967 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 02:20:13,970 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 02:20:13,971 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 02:20:13,972 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 02:20:13,973 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/nsqm-iff.c [2021-02-22 02:20:14,065 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af13c4e0a/586110a1e9a24ee8b88173807191a4b7/FLAG86cce9df9 [2021-02-22 02:20:14,723 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 02:20:14,724 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/nsqm-iff.c [2021-02-22 02:20:14,732 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af13c4e0a/586110a1e9a24ee8b88173807191a4b7/FLAG86cce9df9 [2021-02-22 02:20:15,120 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af13c4e0a/586110a1e9a24ee8b88173807191a4b7 [2021-02-22 02:20:15,123 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 02:20:15,140 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 02:20:15,144 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 02:20:15,144 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 02:20:15,148 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 02:20:15,149 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:20:15" (1/1) ... [2021-02-22 02:20:15,151 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@591e84c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:15, skipping insertion in model container [2021-02-22 02:20:15,151 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:20:15" (1/1) ... [2021-02-22 02:20:15,162 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 02:20:15,185 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 02:20:15,405 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/nsqm-iff.c[591,604] [2021-02-22 02:20:15,426 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:20:15,435 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 02:20:15,449 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/nsqm-iff.c[591,604] [2021-02-22 02:20:15,458 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:20:15,476 INFO L208 MainTranslator]: Completed translation [2021-02-22 02:20:15,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:15 WrapperNode [2021-02-22 02:20:15,477 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 02:20:15,478 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 02:20:15,478 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 02:20:15,478 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 02:20:15,492 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:15" (1/1) ... [2021-02-22 02:20:15,492 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:15" (1/1) ... [2021-02-22 02:20:15,501 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:15" (1/1) ... [2021-02-22 02:20:15,502 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:15" (1/1) ... [2021-02-22 02:20:15,511 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:15" (1/1) ... [2021-02-22 02:20:15,516 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:15" (1/1) ... [2021-02-22 02:20:15,519 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:15" (1/1) ... [2021-02-22 02:20:15,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 02:20:15,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 02:20:15,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 02:20:15,523 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 02:20:15,524 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:20:15,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 02:20:15,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 02:20:15,634 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 02:20:15,634 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-22 02:20:15,634 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-22 02:20:15,634 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 02:20:15,634 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 02:20:15,634 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 02:20:15,635 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 02:20:15,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 02:20:15,635 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-22 02:20:15,635 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-22 02:20:15,635 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-22 02:20:15,635 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-22 02:20:15,636 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 02:20:15,636 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-22 02:20:15,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 02:20:15,636 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 02:20:15,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 02:20:15,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 02:20:15,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 02:20:15,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 02:20:16,032 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 02:20:16,032 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-02-22 02:20:16,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:20:16 BoogieIcfgContainer [2021-02-22 02:20:16,035 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 02:20:16,038 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 02:20:16,038 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 02:20:16,049 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 02:20:16,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:20:15" (1/3) ... [2021-02-22 02:20:16,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d22543f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:20:16, skipping insertion in model container [2021-02-22 02:20:16,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:15" (2/3) ... [2021-02-22 02:20:16,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d22543f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:20:16, skipping insertion in model container [2021-02-22 02:20:16,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:20:16" (3/3) ... [2021-02-22 02:20:16,053 INFO L111 eAbstractionObserver]: Analyzing ICFG nsqm-iff.c [2021-02-22 02:20:16,063 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 02:20:16,067 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 02:20:16,088 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 02:20:16,112 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 02:20:16,112 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 02:20:16,112 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 02:20:16,112 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 02:20:16,113 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 02:20:16,113 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 02:20:16,113 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 02:20:16,113 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 02:20:16,129 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states. [2021-02-22 02:20:16,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-22 02:20:16,140 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:20:16,141 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] [2021-02-22 02:20:16,142 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:20:16,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:20:16,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1172258344, now seen corresponding path program 1 times [2021-02-22 02:20:16,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:20:16,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1107550941] [2021-02-22 02:20:16,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:20:16,241 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:20:16,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:16,400 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:16,402 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:16,403 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:16,404 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:16,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:20:16,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:16,480 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:16,481 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:16,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-22 02:20:16,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:16,490 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:16,490 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:16,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:20:16,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1107550941] [2021-02-22 02:20:16,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:20:16,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-22 02:20:16,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555336174] [2021-02-22 02:20:16,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-22 02:20:16,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:20:16,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-22 02:20:16,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 02:20:16,533 INFO L87 Difference]: Start difference. First operand 71 states. Second operand 3 states. [2021-02-22 02:20:16,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:20:16,730 INFO L93 Difference]: Finished difference Result 119 states and 138 transitions. [2021-02-22 02:20:16,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-22 02:20:16,732 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2021-02-22 02:20:16,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:20:16,742 INFO L225 Difference]: With dead ends: 119 [2021-02-22 02:20:16,742 INFO L226 Difference]: Without dead ends: 63 [2021-02-22 02:20:16,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 02:20:16,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-02-22 02:20:16,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-02-22 02:20:16,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-02-22 02:20:16,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2021-02-22 02:20:16,809 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 38 [2021-02-22 02:20:16,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:20:16,810 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2021-02-22 02:20:16,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-22 02:20:16,810 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2021-02-22 02:20:16,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-22 02:20:16,812 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:20:16,813 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] [2021-02-22 02:20:16,813 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 02:20:16,813 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:20:16,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:20:16,815 INFO L82 PathProgramCache]: Analyzing trace with hash -2126496055, now seen corresponding path program 1 times [2021-02-22 02:20:16,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:20:16,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715619360] [2021-02-22 02:20:16,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:20:16,819 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:20:16,849 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-02-22 02:20:16,849 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-22 02:20:16,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 02:20:16,877 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-02-22 02:20:16,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 02:20:16 BoogieIcfgContainer [2021-02-22 02:20:16,879 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 02:20:16,883 INFO L168 Benchmark]: Toolchain (without parser) took 1752.98 ms. Allocated memory is still 152.0 MB. Free memory was 128.4 MB in the beginning and 83.8 MB in the end (delta: 44.6 MB). Peak memory consumption was 46.2 MB. Max. memory is 8.0 GB. [2021-02-22 02:20:16,885 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 152.0 MB. Free memory is still 124.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:20:16,888 INFO L168 Benchmark]: CACSL2BoogieTranslator took 333.24 ms. Allocated memory is still 152.0 MB. Free memory was 127.3 MB in the beginning and 117.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-22 02:20:16,890 INFO L168 Benchmark]: Boogie Preprocessor took 43.97 ms. Allocated memory is still 152.0 MB. Free memory was 117.3 MB in the beginning and 115.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-22 02:20:16,893 INFO L168 Benchmark]: RCFGBuilder took 512.00 ms. Allocated memory is still 152.0 MB. Free memory was 115.6 MB in the beginning and 131.6 MB in the end (delta: -15.9 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2021-02-22 02:20:16,895 INFO L168 Benchmark]: TraceAbstraction took 840.70 ms. Allocated memory is still 152.0 MB. Free memory was 131.6 MB in the beginning and 83.8 MB in the end (delta: 47.7 MB). Peak memory consumption was 48.2 MB. Max. memory is 8.0 GB. [2021-02-22 02:20:16,905 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 152.0 MB. Free memory is still 124.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 333.24 ms. Allocated memory is still 152.0 MB. Free memory was 127.3 MB in the beginning and 117.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.97 ms. Allocated memory is still 152.0 MB. Free memory was 117.3 MB in the beginning and 115.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 512.00 ms. Allocated memory is still 152.0 MB. Free memory was 115.6 MB in the beginning and 131.6 MB in the end (delta: -15.9 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 840.70 ms. Allocated memory is still 152.0 MB. Free memory was 131.6 MB in the beginning and 83.8 MB in the end (delta: 47.7 MB). Peak memory consumption was 48.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is 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] i=0 [L31] COND FALSE !(i