/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-36cd7be [2021-02-24 04:46:37,090 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 04:46:37,094 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 04:46:37,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 04:46:37,148 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 04:46:37,149 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 04:46:37,150 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 04:46:37,152 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 04:46:37,153 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 04:46:37,154 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 04:46:37,157 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 04:46:37,159 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 04:46:37,161 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 04:46:37,163 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 04:46:37,164 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 04:46:37,165 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 04:46:37,169 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 04:46:37,180 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-24 04:46:37,181 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-24 04:46:37,182 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-24 04:46:37,183 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-24 04:46:37,196 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 04:46:37,196 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 04:46:37,198 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 04:46:37,198 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 04:46:37,199 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 04:46:37,199 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 04:46:37,199 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 04:46:37,199 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 04:46:37,199 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 04:46:37,200 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 04:46:37,200 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 04:46:37,200 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 04:46:37,200 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 04:46:37,201 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 04:46:37,201 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 04:46:37,201 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 04:46:37,202 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 04:46:37,202 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 04:46:37,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 04:46:37,202 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 04:46:37,203 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 04:46:37,203 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 04:46:37,203 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-24 04:46:37,203 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-24 04:46:37,621 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 04:46:37,646 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 04:46:37,649 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 04:46:37,650 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 04:46:37,651 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 04:46:37,652 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/nsqm-iff.c [2021-02-24 04:46:37,749 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75eeea7a6/71c39cf80eca4e85bb22965246749076/FLAG23b9ad4a0 [2021-02-24 04:46:38,407 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 04:46:38,407 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/nsqm-iff.c [2021-02-24 04:46:38,417 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75eeea7a6/71c39cf80eca4e85bb22965246749076/FLAG23b9ad4a0 [2021-02-24 04:46:38,746 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75eeea7a6/71c39cf80eca4e85bb22965246749076 [2021-02-24 04:46:38,750 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 04:46:38,763 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 04:46:38,765 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 04:46:38,766 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 04:46:38,769 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 04:46:38,770 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:46:38" (1/1) ... [2021-02-24 04:46:38,772 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a40dec5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:38, skipping insertion in model container [2021-02-24 04:46:38,773 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:46:38" (1/1) ... [2021-02-24 04:46:38,782 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 04:46:38,802 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 04:46:38,949 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] [2021-02-24 04:46:38,979 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:46:38,992 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 04:46:39,011 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] [2021-02-24 04:46:39,042 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:46:39,068 INFO L208 MainTranslator]: Completed translation [2021-02-24 04:46:39,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:39 WrapperNode [2021-02-24 04:46:39,069 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 04:46:39,071 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 04:46:39,071 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 04:46:39,071 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 04:46:39,087 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:39" (1/1) ... [2021-02-24 04:46:39,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:39" (1/1) ... [2021-02-24 04:46:39,110 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:39" (1/1) ... [2021-02-24 04:46:39,110 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:39" (1/1) ... [2021-02-24 04:46:39,134 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:39" (1/1) ... [2021-02-24 04:46:39,143 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:39" (1/1) ... [2021-02-24 04:46:39,147 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:39" (1/1) ... [2021-02-24 04:46:39,158 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 04:46:39,160 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 04:46:39,160 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 04:46:39,161 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 04:46:39,162 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:39" (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 [2021-02-24 04:46:39,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 04:46:39,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 04:46:39,304 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 04:46:39,304 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-24 04:46:39,304 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 04:46:39,305 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 04:46:39,305 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 04:46:39,305 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 04:46:39,305 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 04:46:39,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 04:46:39,306 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-24 04:46:39,306 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 04:46:39,306 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 04:46:39,307 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-24 04:46:39,307 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 04:46:39,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-24 04:46:39,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 04:46:39,308 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 04:46:39,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 04:46:39,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 04:46:39,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 04:46:39,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 04:46:39,929 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 04:46:39,930 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-02-24 04:46:39,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:46:39 BoogieIcfgContainer [2021-02-24 04:46:39,935 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 04:46:39,936 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 04:46:39,937 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 04:46:39,940 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 04:46:39,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:46:38" (1/3) ... [2021-02-24 04:46:39,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ffd10c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:46:39, skipping insertion in model container [2021-02-24 04:46:39,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:39" (2/3) ... [2021-02-24 04:46:39,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ffd10c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:46:39, skipping insertion in model container [2021-02-24 04:46:39,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:46:39" (3/3) ... [2021-02-24 04:46:39,944 INFO L111 eAbstractionObserver]: Analyzing ICFG nsqm-iff.c [2021-02-24 04:46:39,952 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 04:46:39,958 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 04:46:39,981 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 04:46:40,008 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 04:46:40,008 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 04:46:40,008 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-24 04:46:40,008 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 04:46:40,009 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 04:46:40,009 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 04:46:40,009 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 04:46:40,009 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 04:46:40,028 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states. [2021-02-24 04:46:40,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-24 04:46:40,041 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:46:40,042 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] [2021-02-24 04:46:40,042 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:46:40,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:46:40,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1172258344, now seen corresponding path program 1 times [2021-02-24 04:46:40,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:46:40,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655011477] [2021-02-24 04:46:40,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:46:40,146 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:46:40,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:46:40,309 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:46:40,310 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:46:40,312 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:46:40,313 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:46:40,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:46:40,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:46:40,409 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:46:40,411 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:46:40,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-24 04:46:40,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:46:40,418 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:46:40,419 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:46:40,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:46:40,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655011477] [2021-02-24 04:46:40,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:46:40,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-24 04:46:40,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010823833] [2021-02-24 04:46:40,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-24 04:46:40,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:46:40,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-24 04:46:40,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 04:46:40,462 INFO L87 Difference]: Start difference. First operand 71 states. Second operand 3 states. [2021-02-24 04:46:40,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:46:40,718 INFO L93 Difference]: Finished difference Result 119 states and 138 transitions. [2021-02-24 04:46:40,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-24 04:46:40,720 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2021-02-24 04:46:40,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:46:40,729 INFO L225 Difference]: With dead ends: 119 [2021-02-24 04:46:40,729 INFO L226 Difference]: Without dead ends: 63 [2021-02-24 04:46:40,733 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 [2021-02-24 04:46:40,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-02-24 04:46:40,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-02-24 04:46:40,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-02-24 04:46:40,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2021-02-24 04:46:40,787 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 38 [2021-02-24 04:46:40,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:46:40,788 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2021-02-24 04:46:40,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-24 04:46:40,789 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2021-02-24 04:46:40,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-24 04:46:40,790 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:46:40,790 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] [2021-02-24 04:46:40,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 04:46:40,791 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:46:40,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:46:40,792 INFO L82 PathProgramCache]: Analyzing trace with hash -2126496055, now seen corresponding path program 1 times [2021-02-24 04:46:40,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:46:40,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514617030] [2021-02-24 04:46:40,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:46:40,796 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:46:40,820 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-02-24 04:46:40,821 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 04:46:40,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 04:46:40,842 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-02-24 04:46:40,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 04:46:40 BoogieIcfgContainer [2021-02-24 04:46:40,843 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 04:46:40,845 INFO L168 Benchmark]: Toolchain (without parser) took 2092.60 ms. Allocated memory is still 151.0 MB. Free memory was 127.2 MB in the beginning and 113.1 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.8 MB. Max. memory is 8.0 GB. [2021-02-24 04:46:40,846 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 125.8 MB. Free memory is still 82.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 04:46:40,847 INFO L168 Benchmark]: CACSL2BoogieTranslator took 304.41 ms. Allocated memory is still 151.0 MB. Free memory was 126.2 MB in the beginning and 116.1 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-24 04:46:40,848 INFO L168 Benchmark]: Boogie Preprocessor took 88.01 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 114.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 04:46:40,849 INFO L168 Benchmark]: RCFGBuilder took 775.36 ms. Allocated memory is still 151.0 MB. Free memory was 114.4 MB in the beginning and 121.1 MB in the end (delta: -6.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 8.0 GB. [2021-02-24 04:46:40,850 INFO L168 Benchmark]: TraceAbstraction took 906.75 ms. Allocated memory is still 151.0 MB. Free memory was 120.7 MB in the beginning and 113.1 MB in the end (delta: 7.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2021-02-24 04:46:40,854 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 125.8 MB. Free memory is still 82.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 304.41 ms. Allocated memory is still 151.0 MB. Free memory was 126.2 MB in the beginning and 116.1 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 88.01 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 114.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 775.36 ms. Allocated memory is still 151.0 MB. Free memory was 114.4 MB in the beginning and 121.1 MB in the end (delta: -6.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 906.75 ms. Allocated memory is still 151.0 MB. Free memory was 120.7 MB in the beginning and 113.1 MB in the end (delta: 7.7 MB). Peak memory consumption was 8.4 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