/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/res1f.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 04:46:39,495 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 04:46:39,499 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 04:46:39,553 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 04:46:39,582 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 04:46:39,585 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 04:46:39,587 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 04:46:39,588 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 04:46:39,593 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 04:46:39,594 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 04:46:39,610 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 04:46:39,615 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 04:46:39,619 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 04:46:39,620 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 04:46:39,622 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 04:46:39,624 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 04:46:39,630 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 04:46:39,644 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-24 04:46:39,645 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-24 04:46:39,646 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-24 04:46:39,647 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 04:46:39,672 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 04:46:39,673 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 04:46:39,678 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 04:46:39,678 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 04:46:39,678 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 04:46:39,678 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 04:46:39,679 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 04:46:39,679 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 04:46:39,679 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 04:46:39,679 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 04:46:39,680 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 04:46:39,681 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 04:46:39,681 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 04:46:39,681 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 04:46:39,681 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 04:46:39,682 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 04:46:39,682 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 04:46:39,682 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 04:46:39,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 04:46:39,682 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 04:46:39,683 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 04:46:39,683 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 04:46:39,683 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-24 04:46:39,683 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-24 04:46:40,110 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 04:46:40,134 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 04:46:40,137 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 04:46:40,138 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 04:46:40,139 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 04:46:40,140 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/res1f.c [2021-02-24 04:46:40,221 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5127ff33/48076b5a82ce41a59abab130109fd950/FLAG3b2471811 [2021-02-24 04:46:40,841 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 04:46:40,842 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/res1f.c [2021-02-24 04:46:40,849 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5127ff33/48076b5a82ce41a59abab130109fd950/FLAG3b2471811 [2021-02-24 04:46:41,233 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5127ff33/48076b5a82ce41a59abab130109fd950 [2021-02-24 04:46:41,236 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 04:46:41,251 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 04:46:41,253 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 04:46:41,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 04:46:41,258 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 04:46:41,259 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:46:41" (1/1) ... [2021-02-24 04:46:41,261 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a5657b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:41, skipping insertion in model container [2021-02-24 04:46:41,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:46:41" (1/1) ... [2021-02-24 04:46:41,270 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 04:46:41,290 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 04:46:41,505 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/res1f.c[588,601] [2021-02-24 04:46:41,536 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:46:41,548 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 04:46:41,559 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/res1f.c[588,601] [2021-02-24 04:46:41,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:46:41,585 INFO L208 MainTranslator]: Completed translation [2021-02-24 04:46:41,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:41 WrapperNode [2021-02-24 04:46:41,586 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 04:46:41,587 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 04:46:41,587 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 04:46:41,587 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 04:46:41,600 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:41" (1/1) ... [2021-02-24 04:46:41,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:41" (1/1) ... [2021-02-24 04:46:41,608 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:41" (1/1) ... [2021-02-24 04:46:41,608 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:41" (1/1) ... [2021-02-24 04:46:41,617 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:41" (1/1) ... [2021-02-24 04:46:41,623 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:41" (1/1) ... [2021-02-24 04:46:41,624 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:41" (1/1) ... [2021-02-24 04:46:41,627 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 04:46:41,628 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 04:46:41,628 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 04:46:41,628 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 04:46:41,629 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:41" (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 04:46:41,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 04:46:41,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 04:46:41,728 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 04:46:41,729 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-24 04:46:41,729 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 04:46:41,729 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 04:46:41,729 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 04:46:41,729 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 04:46:41,730 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 04:46:41,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 04:46:41,730 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-24 04:46:41,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 04:46:41,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 04:46:41,730 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-24 04:46:41,731 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 04:46:41,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-24 04:46:41,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 04:46:41,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 04:46:41,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 04:46:41,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 04:46:41,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 04:46:41,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 04:46:42,155 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 04:46:42,155 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-02-24 04:46:42,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:46:42 BoogieIcfgContainer [2021-02-24 04:46:42,157 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 04:46:42,159 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 04:46:42,159 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 04:46:42,162 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 04:46:42,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:46:41" (1/3) ... [2021-02-24 04:46:42,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@180f4875 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:46:42, skipping insertion in model container [2021-02-24 04:46:42,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:41" (2/3) ... [2021-02-24 04:46:42,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@180f4875 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:46:42, skipping insertion in model container [2021-02-24 04:46:42,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:46:42" (3/3) ... [2021-02-24 04:46:42,165 INFO L111 eAbstractionObserver]: Analyzing ICFG res1f.c [2021-02-24 04:46:42,170 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 04:46:42,174 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 04:46:42,191 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 04:46:42,215 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 04:46:42,216 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 04:46:42,216 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-24 04:46:42,216 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 04:46:42,216 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 04:46:42,216 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 04:46:42,216 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 04:46:42,217 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 04:46:42,233 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states. [2021-02-24 04:46:42,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-24 04:46:42,244 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:46:42,245 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] [2021-02-24 04:46:42,245 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:46:42,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:46:42,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1991564409, now seen corresponding path program 1 times [2021-02-24 04:46:42,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:46:42,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517727480] [2021-02-24 04:46:42,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:46:42,342 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:46:42,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:46:42,500 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:46:42,501 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:46:42,502 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:46:42,503 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:46:42,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:46:42,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:46:42,615 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:46:42,615 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:46:42,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-24 04:46:42,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:46:42,623 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:46:42,624 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:46:42,633 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 04:46:42,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517727480] [2021-02-24 04:46:42,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:46:42,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-24 04:46:42,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296098709] [2021-02-24 04:46:42,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-24 04:46:42,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:46:42,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-24 04:46:42,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 04:46:42,663 INFO L87 Difference]: Start difference. First operand 80 states. Second operand 3 states. [2021-02-24 04:46:42,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:46:42,848 INFO L93 Difference]: Finished difference Result 137 states and 156 transitions. [2021-02-24 04:46:42,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-24 04:46:42,849 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2021-02-24 04:46:42,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:46:42,858 INFO L225 Difference]: With dead ends: 137 [2021-02-24 04:46:42,859 INFO L226 Difference]: Without dead ends: 67 [2021-02-24 04:46:42,862 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 04:46:42,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-02-24 04:46:42,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-02-24 04:46:42,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-02-24 04:46:42,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2021-02-24 04:46:42,916 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 42 [2021-02-24 04:46:42,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:46:42,917 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2021-02-24 04:46:42,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-24 04:46:42,918 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2021-02-24 04:46:42,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-24 04:46:42,920 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:46:42,920 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] [2021-02-24 04:46:42,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 04:46:42,921 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:46:42,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:46:42,922 INFO L82 PathProgramCache]: Analyzing trace with hash 749526049, now seen corresponding path program 1 times [2021-02-24 04:46:42,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:46:42,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350576047] [2021-02-24 04:46:42,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:46:42,927 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:46:42,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:46:43,080 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:46:43,081 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:46:43,083 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:46:43,085 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:46:43,097 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:46:43,099 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:46:43,106 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:46:43,107 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:46:43,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:46:43,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:46:43,172 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:46:43,173 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:46:43,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-24 04:46:43,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:46:43,189 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:46:43,190 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:46:43,197 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 04:46:43,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350576047] [2021-02-24 04:46:43,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:46:43,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-24 04:46:43,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593643266] [2021-02-24 04:46:43,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-24 04:46:43,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:46:43,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-24 04:46:43,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-24 04:46:43,202 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 5 states. [2021-02-24 04:46:43,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:46:43,448 INFO L93 Difference]: Finished difference Result 123 states and 132 transitions. [2021-02-24 04:46:43,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-24 04:46:43,449 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2021-02-24 04:46:43,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:46:43,451 INFO L225 Difference]: With dead ends: 123 [2021-02-24 04:46:43,451 INFO L226 Difference]: Without dead ends: 91 [2021-02-24 04:46:43,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-24 04:46:43,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-02-24 04:46:43,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 71. [2021-02-24 04:46:43,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-02-24 04:46:43,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2021-02-24 04:46:43,490 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 42 [2021-02-24 04:46:43,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:46:43,490 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2021-02-24 04:46:43,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-24 04:46:43,491 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2021-02-24 04:46:43,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-02-24 04:46:43,494 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:46:43,494 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:46:43,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 04:46:43,495 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:46:43,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:46:43,498 INFO L82 PathProgramCache]: Analyzing trace with hash 558292563, now seen corresponding path program 1 times [2021-02-24 04:46:43,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:46:43,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854801761] [2021-02-24 04:46:43,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:46:43,525 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:46:43,538 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 04:46:43,545 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:46:43,548 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 04:46:43,554 WARN L141 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size [2021-02-24 04:46:43,570 WARN L147 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size 13 [2021-02-24 04:46:43,588 WARN L141 QuantifierPusher]: treesize reduction 14, result has 68.2 percent of original size [2021-02-24 04:46:43,591 WARN L147 QuantifierPusher]: treesize reduction 14, result has 68.2 percent of original size 30 [2021-02-24 04:46:43,592 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-24 04:46:43,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:46:43,656 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:46:43,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:46:43,710 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:46:43,773 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 04:46:43,773 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 04:46:43,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 04:46:43,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 04:46:43 BoogieIcfgContainer [2021-02-24 04:46:43,794 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 04:46:43,795 INFO L168 Benchmark]: Toolchain (without parser) took 2556.33 ms. Allocated memory was 152.0 MB in the beginning and 182.5 MB in the end (delta: 30.4 MB). Free memory was 126.8 MB in the beginning and 103.6 MB in the end (delta: 23.2 MB). Peak memory consumption was 54.7 MB. Max. memory is 8.0 GB. [2021-02-24 04:46:43,796 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 152.0 MB. Free memory is still 126.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 04:46:43,797 INFO L168 Benchmark]: CACSL2BoogieTranslator took 332.65 ms. Allocated memory is still 152.0 MB. Free memory was 125.6 MB in the beginning and 115.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-24 04:46:43,797 INFO L168 Benchmark]: Boogie Preprocessor took 40.35 ms. Allocated memory is still 152.0 MB. Free memory was 115.6 MB in the beginning and 114.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 04:46:43,798 INFO L168 Benchmark]: RCFGBuilder took 529.54 ms. Allocated memory is still 152.0 MB. Free memory was 114.0 MB in the beginning and 126.8 MB in the end (delta: -12.8 MB). Peak memory consumption was 19.0 MB. Max. memory is 8.0 GB. [2021-02-24 04:46:43,799 INFO L168 Benchmark]: TraceAbstraction took 1634.96 ms. Allocated memory was 152.0 MB in the beginning and 182.5 MB in the end (delta: 30.4 MB). Free memory was 126.3 MB in the beginning and 103.6 MB in the end (delta: 22.6 MB). Peak memory consumption was 53.6 MB. Max. memory is 8.0 GB. [2021-02-24 04:46:43,803 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 152.0 MB. Free memory is still 126.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 332.65 ms. Allocated memory is still 152.0 MB. Free memory was 125.6 MB in the beginning and 115.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.35 ms. Allocated memory is still 152.0 MB. Free memory was 115.6 MB in the beginning and 114.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 529.54 ms. Allocated memory is still 152.0 MB. Free memory was 114.0 MB in the beginning and 126.8 MB in the end (delta: -12.8 MB). Peak memory consumption was 19.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1634.96 ms. Allocated memory was 152.0 MB in the beginning and 182.5 MB in the end (delta: 30.4 MB). Free memory was 126.3 MB in the beginning and 103.6 MB in the end (delta: 22.6 MB). Peak memory consumption was 53.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a 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); [L30] int *b = malloc(sizeof(int)*N); [L32] sum[0] = 1 [L33] i=0 [L33] COND TRUE i