/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/nla-digbench/mannadiv.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 04:50:39,560 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 04:50:39,565 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 04:50:39,609 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 04:50:39,622 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 04:50:39,624 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 04:50:39,625 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 04:50:39,626 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 04:50:39,628 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 04:50:39,629 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 04:50:39,631 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 04:50:39,633 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 04:50:39,636 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 04:50:39,637 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 04:50:39,639 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 04:50:39,640 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 04:50:39,644 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 04:50:39,655 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-24 04:50:39,656 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-24 04:50:39,657 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-24 04:50:39,661 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 04:50:39,693 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 04:50:39,693 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 04:50:39,696 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 04:50:39,697 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 04:50:39,697 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 04:50:39,697 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 04:50:39,698 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 04:50:39,700 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 04:50:39,701 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 04:50:39,701 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 04:50:39,701 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 04:50:39,701 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 04:50:39,701 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 04:50:39,702 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 04:50:39,702 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 04:50:39,702 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 04:50:39,702 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 04:50:39,703 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 04:50:39,703 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 04:50:39,704 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 04:50:39,705 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 04:50:39,705 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 04:50:39,705 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-24 04:50:39,705 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-24 04:50:40,135 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 04:50:40,189 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 04:50:40,193 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 04:50:40,194 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 04:50:40,195 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 04:50:40,196 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/mannadiv.c [2021-02-24 04:50:40,283 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf454e048/7acb01569c944f088149309882205715/FLAGe4740dc8b [2021-02-24 04:50:40,979 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 04:50:40,980 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/mannadiv.c [2021-02-24 04:50:40,989 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf454e048/7acb01569c944f088149309882205715/FLAGe4740dc8b [2021-02-24 04:50:41,348 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf454e048/7acb01569c944f088149309882205715 [2021-02-24 04:50:41,352 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 04:50:41,368 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 04:50:41,371 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 04:50:41,371 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 04:50:41,376 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 04:50:41,377 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:50:41" (1/1) ... [2021-02-24 04:50:41,378 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44d28c65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:50:41, skipping insertion in model container [2021-02-24 04:50:41,378 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:50:41" (1/1) ... [2021-02-24 04:50:41,389 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 04:50:41,408 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 04:50:41,584 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/mannadiv.c[573,586] [2021-02-24 04:50:41,604 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:50:41,618 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 04:50:41,635 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/mannadiv.c[573,586] [2021-02-24 04:50:41,642 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:50:41,661 INFO L208 MainTranslator]: Completed translation [2021-02-24 04:50:41,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:50:41 WrapperNode [2021-02-24 04:50:41,662 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 04:50:41,664 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 04:50:41,664 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 04:50:41,664 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 04:50:41,679 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:50:41" (1/1) ... [2021-02-24 04:50:41,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:50:41" (1/1) ... [2021-02-24 04:50:41,689 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:50:41" (1/1) ... [2021-02-24 04:50:41,689 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:50:41" (1/1) ... [2021-02-24 04:50:41,697 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:50:41" (1/1) ... [2021-02-24 04:50:41,702 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:50:41" (1/1) ... [2021-02-24 04:50:41,704 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:50:41" (1/1) ... [2021-02-24 04:50:41,707 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 04:50:41,708 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 04:50:41,708 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 04:50:41,708 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 04:50:41,709 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:50:41" (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 04:50:41,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 04:50:41,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 04:50:41,826 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 04:50:41,826 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-24 04:50:41,826 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 04:50:41,827 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 04:50:41,827 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 04:50:41,827 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 04:50:41,827 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 04:50:41,827 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 04:50:41,828 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 04:50:41,828 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-24 04:50:41,828 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 04:50:41,828 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 04:50:41,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 04:50:41,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 04:50:41,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 04:50:41,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 04:50:41,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 04:50:41,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 04:50:42,131 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 04:50:42,132 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-24 04:50:42,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:50:42 BoogieIcfgContainer [2021-02-24 04:50:42,135 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 04:50:42,137 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 04:50:42,137 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 04:50:42,142 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 04:50:42,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:50:41" (1/3) ... [2021-02-24 04:50:42,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@102db1da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:50:42, skipping insertion in model container [2021-02-24 04:50:42,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:50:41" (2/3) ... [2021-02-24 04:50:42,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@102db1da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:50:42, skipping insertion in model container [2021-02-24 04:50:42,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:50:42" (3/3) ... [2021-02-24 04:50:42,146 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv.c [2021-02-24 04:50:42,155 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 04:50:42,160 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 04:50:42,187 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 04:50:42,227 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 04:50:42,228 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 04:50:42,228 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-24 04:50:42,228 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 04:50:42,230 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 04:50:42,230 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 04:50:42,230 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 04:50:42,231 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 04:50:42,275 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2021-02-24 04:50:42,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-24 04:50:42,289 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:50:42,290 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:50:42,291 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:50:42,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:50:42,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1207912582, now seen corresponding path program 1 times [2021-02-24 04:50:42,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:50:42,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972887483] [2021-02-24 04:50:42,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:50:42,423 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:50:42,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:42,572 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:42,573 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:42,575 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:42,575 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:42,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:50:42,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:42,694 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:42,696 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:42,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-02-24 04:50:42,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:42,717 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:42,717 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:42,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-24 04:50:42,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:42,736 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:42,738 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:42,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-24 04:50:42,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972887483] [2021-02-24 04:50:42,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:50:42,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-24 04:50:42,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001265998] [2021-02-24 04:50:42,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-24 04:50:42,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:50:42,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-24 04:50:42,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 04:50:42,805 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 3 states. [2021-02-24 04:50:42,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:50:42,958 INFO L93 Difference]: Finished difference Result 84 states and 101 transitions. [2021-02-24 04:50:42,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-24 04:50:42,961 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2021-02-24 04:50:42,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:50:42,973 INFO L225 Difference]: With dead ends: 84 [2021-02-24 04:50:42,973 INFO L226 Difference]: Without dead ends: 48 [2021-02-24 04:50:42,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 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 04:50:43,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-02-24 04:50:43,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-02-24 04:50:43,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-02-24 04:50:43,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2021-02-24 04:50:43,065 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 41 [2021-02-24 04:50:43,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:50:43,068 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2021-02-24 04:50:43,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-24 04:50:43,068 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2021-02-24 04:50:43,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-24 04:50:43,071 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:50:43,071 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:50:43,071 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 04:50:43,072 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:50:43,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:50:43,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1209700042, now seen corresponding path program 1 times [2021-02-24 04:50:43,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:50:43,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108510471] [2021-02-24 04:50:43,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:50:43,078 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:50:43,103 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-02-24 04:50:43,104 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 04:50:43,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 04:50:43,129 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-02-24 04:50:43,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 04:50:43 BoogieIcfgContainer [2021-02-24 04:50:43,130 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 04:50:43,132 INFO L168 Benchmark]: Toolchain (without parser) took 1777.13 ms. Allocated memory is still 156.2 MB. Free memory was 132.2 MB in the beginning and 134.2 MB in the end (delta: -2.0 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 04:50:43,133 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 156.2 MB. Free memory is still 141.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 04:50:43,134 INFO L168 Benchmark]: CACSL2BoogieTranslator took 292.05 ms. Allocated memory is still 156.2 MB. Free memory was 131.1 MB in the beginning and 120.9 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-24 04:50:43,135 INFO L168 Benchmark]: Boogie Preprocessor took 43.04 ms. Allocated memory is still 156.2 MB. Free memory was 120.9 MB in the beginning and 119.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 04:50:43,136 INFO L168 Benchmark]: RCFGBuilder took 427.03 ms. Allocated memory is still 156.2 MB. Free memory was 119.4 MB in the beginning and 131.9 MB in the end (delta: -12.5 MB). Peak memory consumption was 13.3 MB. Max. memory is 8.0 GB. [2021-02-24 04:50:43,137 INFO L168 Benchmark]: TraceAbstraction took 993.30 ms. Allocated memory is still 156.2 MB. Free memory was 131.3 MB in the beginning and 134.2 MB in the end (delta: -2.9 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 04:50:43,141 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 156.2 MB. Free memory is still 141.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 292.05 ms. Allocated memory is still 156.2 MB. Free memory was 131.1 MB in the beginning and 120.9 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.04 ms. Allocated memory is still 156.2 MB. Free memory was 120.9 MB in the beginning and 119.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 427.03 ms. Allocated memory is still 156.2 MB. Free memory was 119.4 MB in the beginning and 131.9 MB in the end (delta: -12.5 MB). Peak memory consumption was 13.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 993.30 ms. Allocated memory is still 156.2 MB. Free memory was 131.3 MB in the beginning and 134.2 MB in the end (delta: -2.9 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 18]: 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: [L23] int x1, x2; [L24] int y1, y2, y3; [L25] x1 = __VERIFIER_nondet_int() [L26] x2 = __VERIFIER_nondet_int() [L28] CALL assume_abort_if_not(x1 >= 0) [L13] COND FALSE !(!cond) [L28] RET assume_abort_if_not(x1 >= 0) [L29] CALL assume_abort_if_not(x2 != 0) [L13] COND FALSE !(!cond) [L29] RET assume_abort_if_not(x2 != 0) [L31] y1 = 0 [L32] y2 = 0 [L33] y3 = x1 [L35] COND TRUE 1 [L36] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND TRUE !(cond) [L18] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 57 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 53 SDtfs, 35 SDslu, 4 SDs, 0 SdLazy, 12 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...