/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/loop-lit/gsv2008.c.i.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 04:49:16,538 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 04:49:16,542 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 04:49:16,586 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 04:49:16,601 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 04:49:16,602 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 04:49:16,604 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 04:49:16,605 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 04:49:16,617 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 04:49:16,618 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 04:49:16,621 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 04:49:16,623 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 04:49:16,625 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 04:49:16,627 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 04:49:16,629 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 04:49:16,630 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 04:49:16,634 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 04:49:16,645 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-24 04:49:16,646 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-24 04:49:16,647 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-24 04:49:16,650 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 04:49:16,663 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 04:49:16,663 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 04:49:16,665 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 04:49:16,666 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 04:49:16,666 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 04:49:16,666 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 04:49:16,666 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 04:49:16,667 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 04:49:16,667 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 04:49:16,667 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 04:49:16,668 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 04:49:16,668 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 04:49:16,668 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 04:49:16,668 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 04:49:16,669 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 04:49:16,669 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 04:49:16,669 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 04:49:16,670 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 04:49:16,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 04:49:16,670 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 04:49:16,671 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 04:49:16,671 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 04:49:16,671 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-24 04:49:16,671 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-24 04:49:17,127 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 04:49:17,155 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 04:49:17,158 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 04:49:17,159 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 04:49:17,160 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 04:49:17,161 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gsv2008.c.i.p+cfa-reducer.c [2021-02-24 04:49:17,239 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3b86cc87/d04b1e53a2dd4bdcb8c1d0a5e91c6ea9/FLAG43b8c71bc [2021-02-24 04:49:17,828 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 04:49:17,829 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gsv2008.c.i.p+cfa-reducer.c [2021-02-24 04:49:17,836 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3b86cc87/d04b1e53a2dd4bdcb8c1d0a5e91c6ea9/FLAG43b8c71bc [2021-02-24 04:49:18,207 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3b86cc87/d04b1e53a2dd4bdcb8c1d0a5e91c6ea9 [2021-02-24 04:49:18,210 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 04:49:18,224 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 04:49:18,228 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 04:49:18,228 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 04:49:18,233 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 04:49:18,234 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:49:18" (1/1) ... [2021-02-24 04:49:18,235 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58a09f05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:49:18, skipping insertion in model container [2021-02-24 04:49:18,235 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:49:18" (1/1) ... [2021-02-24 04:49:18,244 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 04:49:18,263 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 04:49:18,425 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gsv2008.c.i.p+cfa-reducer.c[989,1002] [2021-02-24 04:49:18,429 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:49:18,440 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 04:49:18,460 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gsv2008.c.i.p+cfa-reducer.c[989,1002] [2021-02-24 04:49:18,461 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:49:18,479 INFO L208 MainTranslator]: Completed translation [2021-02-24 04:49:18,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:49:18 WrapperNode [2021-02-24 04:49:18,480 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 04:49:18,481 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 04:49:18,481 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 04:49:18,481 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 04:49:18,496 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:49:18" (1/1) ... [2021-02-24 04:49:18,496 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:49:18" (1/1) ... [2021-02-24 04:49:18,505 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:49:18" (1/1) ... [2021-02-24 04:49:18,505 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:49:18" (1/1) ... [2021-02-24 04:49:18,511 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:49:18" (1/1) ... [2021-02-24 04:49:18,514 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:49:18" (1/1) ... [2021-02-24 04:49:18,515 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:49:18" (1/1) ... [2021-02-24 04:49:18,517 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 04:49:18,518 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 04:49:18,519 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 04:49:18,519 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 04:49:18,520 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:49:18" (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 04:49:18,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 04:49:18,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 04:49:18,641 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 04:49:18,641 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-24 04:49:18,641 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 04:49:18,642 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 04:49:18,642 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 04:49:18,642 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 04:49:18,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 04:49:18,643 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-24 04:49:18,643 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 04:49:18,644 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 04:49:18,644 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 04:49:18,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 04:49:18,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 04:49:18,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 04:49:18,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 04:49:18,646 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 04:49:18,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 04:49:19,211 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 04:49:19,212 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-24 04:49:19,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:49:19 BoogieIcfgContainer [2021-02-24 04:49:19,214 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 04:49:19,215 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 04:49:19,216 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 04:49:19,219 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 04:49:19,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:49:18" (1/3) ... [2021-02-24 04:49:19,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f47a153 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:49:19, skipping insertion in model container [2021-02-24 04:49:19,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:49:18" (2/3) ... [2021-02-24 04:49:19,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f47a153 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:49:19, skipping insertion in model container [2021-02-24 04:49:19,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:49:19" (3/3) ... [2021-02-24 04:49:19,223 INFO L111 eAbstractionObserver]: Analyzing ICFG gsv2008.c.i.p+cfa-reducer.c [2021-02-24 04:49:19,233 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 04:49:19,243 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 04:49:19,266 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 04:49:19,307 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 04:49:19,307 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 04:49:19,307 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-24 04:49:19,308 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 04:49:19,308 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 04:49:19,308 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 04:49:19,308 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 04:49:19,308 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 04:49:19,331 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2021-02-24 04:49:19,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-24 04:49:19,348 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:49:19,349 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] [2021-02-24 04:49:19,350 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:49:19,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:49:19,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1684338299, now seen corresponding path program 1 times [2021-02-24 04:49:19,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:49:19,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1293510067] [2021-02-24 04:49:19,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:49:19,473 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:49:19,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:49:19,719 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:49:19,721 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:49:19,723 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:49:19,725 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 04:49:19,748 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:49:19,750 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:49:19,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:49:19,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:49:19,929 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:49:19,932 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:49:19,947 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 04:49:19,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1293510067] [2021-02-24 04:49:19,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:49:19,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-24 04:49:19,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274721496] [2021-02-24 04:49:19,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-24 04:49:19,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:49:19,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-24 04:49:19,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-24 04:49:19,977 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 4 states. [2021-02-24 04:49:20,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:49:20,225 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2021-02-24 04:49:20,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-24 04:49:20,228 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2021-02-24 04:49:20,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:49:20,237 INFO L225 Difference]: With dead ends: 59 [2021-02-24 04:49:20,238 INFO L226 Difference]: Without dead ends: 35 [2021-02-24 04:49:20,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-24 04:49:20,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-02-24 04:49:20,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-02-24 04:49:20,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-02-24 04:49:20,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2021-02-24 04:49:20,299 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 29 [2021-02-24 04:49:20,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:49:20,299 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2021-02-24 04:49:20,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-24 04:49:20,300 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2021-02-24 04:49:20,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-24 04:49:20,301 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:49:20,301 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] [2021-02-24 04:49:20,302 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 04:49:20,302 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:49:20,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:49:20,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1669681219, now seen corresponding path program 1 times [2021-02-24 04:49:20,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:49:20,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418175297] [2021-02-24 04:49:20,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:49:20,331 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:49:20,350 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-24 04:49:20,358 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:49:20,362 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-24 04:49:20,371 WARN L141 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size [2021-02-24 04:49:20,388 WARN L147 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size 13 [2021-02-24 04:49:20,395 WARN L141 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size [2021-02-24 04:49:20,400 WARN L147 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size 34 [2021-02-24 04:49:20,404 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-24 04:49:20,434 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-02-24 04:49:20,434 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 04:49:20,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 04:49:20,456 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-02-24 04:49:20,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 04:49:20 BoogieIcfgContainer [2021-02-24 04:49:20,457 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 04:49:20,458 INFO L168 Benchmark]: Toolchain (without parser) took 2245.97 ms. Allocated memory is still 151.0 MB. Free memory was 127.7 MB in the beginning and 78.4 MB in the end (delta: 49.3 MB). Peak memory consumption was 49.3 MB. Max. memory is 8.0 GB. [2021-02-24 04:49:20,459 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory was 124.6 MB in the beginning and 124.2 MB in the end (delta: 435.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 04:49:20,460 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.49 ms. Allocated memory is still 151.0 MB. Free memory was 126.7 MB in the beginning and 116.5 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-24 04:49:20,461 INFO L168 Benchmark]: Boogie Preprocessor took 36.72 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 115.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 04:49:20,462 INFO L168 Benchmark]: RCFGBuilder took 695.41 ms. Allocated memory is still 151.0 MB. Free memory was 115.1 MB in the beginning and 130.9 MB in the end (delta: -15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-02-24 04:49:20,463 INFO L168 Benchmark]: TraceAbstraction took 1241.63 ms. Allocated memory is still 151.0 MB. Free memory was 130.3 MB in the beginning and 78.4 MB in the end (delta: 51.9 MB). Peak memory consumption was 52.4 MB. Max. memory is 8.0 GB. [2021-02-24 04:49:20,467 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory was 124.6 MB in the beginning and 124.2 MB in the end (delta: 435.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 252.49 ms. Allocated memory is still 151.0 MB. Free memory was 126.7 MB in the beginning and 116.5 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.72 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 115.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 695.41 ms. Allocated memory is still 151.0 MB. Free memory was 115.1 MB in the beginning and 130.9 MB in the end (delta: -15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1241.63 ms. Allocated memory is still 151.0 MB. Free memory was 130.3 MB in the beginning and 78.4 MB in the end (delta: 51.9 MB). Peak memory consumption was 52.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 48]: 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: [L1] int __return_main; [L12] int __return_144; [L15] int main__x; [L16] int main__y; [L17] main__x = -50 [L18] main__y = __VERIFIER_nondet_int() [L19] COND FALSE !(!(-1000 < main__y)) [L25] COND FALSE !(!(main__y < 1000000)) [L32] COND TRUE main__x < 0 [L34] main__x = main__x + main__y [L35] int main____CPAchecker_TMP_0 = main__y; [L36] main__y = main__y + 1 [L32] COND FALSE !(main__x < 0) [L42] int __tmp_1; [L43] __tmp_1 = main__y > 0 [L44] int __VERIFIER_assert__cond; [L45] __VERIFIER_assert__cond = __tmp_1 [L46] COND TRUE __VERIFIER_assert__cond == 0 [L48] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 50 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 1.1s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 39 SDtfs, 32 SDslu, 22 SDs, 0 SdLazy, 32 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred 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, 1 StatesRemovedByMinimization, 1 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...