/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.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 02:23:35,331 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 02:23:35,335 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 02:23:35,378 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 02:23:35,402 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 02:23:35,403 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 02:23:35,405 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 02:23:35,407 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 02:23:35,409 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 02:23:35,410 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 02:23:35,413 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 02:23:35,420 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 02:23:35,422 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 02:23:35,427 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 02:23:35,432 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 02:23:35,434 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 02:23:35,439 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 02:23:35,460 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 02:23:35,462 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 02:23:35,463 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 02:23:35,469 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-22 02:23:35,503 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 02:23:35,503 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 02:23:35,510 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 02:23:35,510 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 02:23:35,510 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 02:23:35,510 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 02:23:35,511 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 02:23:35,511 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 02:23:35,511 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 02:23:35,511 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 02:23:35,512 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 02:23:35,513 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 02:23:35,513 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 02:23:35,513 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 02:23:35,513 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 02:23:35,514 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 02:23:35,514 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 02:23:35,514 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 02:23:35,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:23:35,514 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 02:23:35,515 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 02:23:35,515 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 02:23:35,515 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 02:23:35,515 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 02:23:35,984 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 02:23:36,042 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 02:23:36,047 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 02:23:36,049 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 02:23:36,050 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 02:23:36,051 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+cfa-reducer.c [2021-02-22 02:23:36,149 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d706471f7/f5ae7e7376c64a1c851c0c4fb8993569/FLAG22151cc9c [2021-02-22 02:23:37,002 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 02:23:37,003 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+cfa-reducer.c [2021-02-22 02:23:37,015 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d706471f7/f5ae7e7376c64a1c851c0c4fb8993569/FLAG22151cc9c [2021-02-22 02:23:37,326 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d706471f7/f5ae7e7376c64a1c851c0c4fb8993569 [2021-02-22 02:23:37,332 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 02:23:37,348 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 02:23:37,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 02:23:37,356 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 02:23:37,361 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 02:23:37,362 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:23:37" (1/1) ... [2021-02-22 02:23:37,364 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3490b228 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:37, skipping insertion in model container [2021-02-22 02:23:37,365 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:23:37" (1/1) ... [2021-02-22 02:23:37,374 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 02:23:37,394 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 02:23:37,578 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.v+cfa-reducer.c[986,999] [2021-02-22 02:23:37,583 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:23:37,599 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 02:23:37,636 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.v+cfa-reducer.c[986,999] [2021-02-22 02:23:37,640 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:23:37,670 INFO L208 MainTranslator]: Completed translation [2021-02-22 02:23:37,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:37 WrapperNode [2021-02-22 02:23:37,671 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 02:23:37,673 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 02:23:37,674 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 02:23:37,675 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 02:23:37,691 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:37" (1/1) ... [2021-02-22 02:23:37,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:37" (1/1) ... [2021-02-22 02:23:37,702 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:37" (1/1) ... [2021-02-22 02:23:37,703 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:37" (1/1) ... [2021-02-22 02:23:37,721 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:37" (1/1) ... [2021-02-22 02:23:37,734 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:37" (1/1) ... [2021-02-22 02:23:37,736 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:37" (1/1) ... [2021-02-22 02:23:37,745 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 02:23:37,749 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 02:23:37,750 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 02:23:37,750 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 02:23:37,751 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:23:37,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 02:23:37,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 02:23:37,889 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 02:23:37,889 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-22 02:23:37,890 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 02:23:37,890 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 02:23:37,890 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 02:23:37,891 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 02:23:37,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 02:23:37,891 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-22 02:23:37,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-22 02:23:37,892 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-22 02:23:37,892 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 02:23:37,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 02:23:37,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 02:23:37,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 02:23:37,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 02:23:37,893 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 02:23:37,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 02:23:38,311 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 02:23:38,312 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-22 02:23:38,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:23:38 BoogieIcfgContainer [2021-02-22 02:23:38,314 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 02:23:38,317 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 02:23:38,317 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 02:23:38,322 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 02:23:38,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:23:37" (1/3) ... [2021-02-22 02:23:38,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2130f5e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:23:38, skipping insertion in model container [2021-02-22 02:23:38,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:37" (2/3) ... [2021-02-22 02:23:38,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2130f5e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:23:38, skipping insertion in model container [2021-02-22 02:23:38,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:23:38" (3/3) ... [2021-02-22 02:23:38,326 INFO L111 eAbstractionObserver]: Analyzing ICFG gsv2008.c.i.v+cfa-reducer.c [2021-02-22 02:23:38,337 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 02:23:38,351 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 02:23:38,389 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 02:23:38,465 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 02:23:38,465 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 02:23:38,465 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 02:23:38,465 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 02:23:38,466 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 02:23:38,466 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 02:23:38,466 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 02:23:38,466 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 02:23:38,486 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2021-02-22 02:23:38,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-22 02:23:38,498 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:23:38,499 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] [2021-02-22 02:23:38,500 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:23:38,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:23:38,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1684338299, now seen corresponding path program 1 times [2021-02-22 02:23:38,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:23:38,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940011680] [2021-02-22 02:23:38,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:23:38,622 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:23:38,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:23:38,883 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:38,885 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:23:38,888 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:38,890 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-22 02:23:38,921 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:38,923 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:23:39,079 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-02-22 02:23:39,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:23:39,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:23:39,151 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:39,153 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:23:39,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:23:39,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940011680] [2021-02-22 02:23:39,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:23:39,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-22 02:23:39,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987666973] [2021-02-22 02:23:39,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-22 02:23:39,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:23:39,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-22 02:23:39,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-22 02:23:39,211 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 4 states. [2021-02-22 02:23:39,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:23:39,605 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2021-02-22 02:23:39,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-22 02:23:39,608 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2021-02-22 02:23:39,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:23:39,621 INFO L225 Difference]: With dead ends: 59 [2021-02-22 02:23:39,621 INFO L226 Difference]: Without dead ends: 35 [2021-02-22 02:23:39,625 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 [2021-02-22 02:23:39,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-02-22 02:23:39,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-02-22 02:23:39,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-02-22 02:23:39,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2021-02-22 02:23:39,688 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 29 [2021-02-22 02:23:39,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:23:39,689 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2021-02-22 02:23:39,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-22 02:23:39,690 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2021-02-22 02:23:39,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-22 02:23:39,691 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:23:39,691 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] [2021-02-22 02:23:39,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 02:23:39,692 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:23:39,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:23:39,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1669681219, now seen corresponding path program 1 times [2021-02-22 02:23:39,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:23:39,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784082246] [2021-02-22 02:23:39,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:23:39,727 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:39,752 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-22 02:23:39,761 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:39,766 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-22 02:23:39,776 WARN L141 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size [2021-02-22 02:23:39,799 WARN L147 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size 13 [2021-02-22 02:23:39,808 WARN L141 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size [2021-02-22 02:23:39,813 WARN L147 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size 34 [2021-02-22 02:23:39,815 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-22 02:23:39,839 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-02-22 02:23:39,839 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-22 02:23:39,846 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 02:23:39,864 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-02-22 02:23:39,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 02:23:39 BoogieIcfgContainer [2021-02-22 02:23:39,865 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 02:23:39,867 INFO L168 Benchmark]: Toolchain (without parser) took 2531.67 ms. Allocated memory is still 161.5 MB. Free memory was 138.8 MB in the beginning and 94.6 MB in the end (delta: 44.2 MB). Peak memory consumption was 44.1 MB. Max. memory is 8.0 GB. [2021-02-22 02:23:39,868 INFO L168 Benchmark]: CDTParser took 0.39 ms. Allocated memory is still 161.5 MB. Free memory was 133.9 MB in the beginning and 133.7 MB in the end (delta: 215.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:23:39,869 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.44 ms. Allocated memory is still 161.5 MB. Free memory was 137.8 MB in the beginning and 128.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-22 02:23:39,870 INFO L168 Benchmark]: Boogie Preprocessor took 72.42 ms. Allocated memory is still 161.5 MB. Free memory was 128.1 MB in the beginning and 126.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-22 02:23:39,871 INFO L168 Benchmark]: RCFGBuilder took 565.29 ms. Allocated memory is still 161.5 MB. Free memory was 126.5 MB in the beginning and 111.4 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-02-22 02:23:39,872 INFO L168 Benchmark]: TraceAbstraction took 1548.76 ms. Allocated memory is still 161.5 MB. Free memory was 111.0 MB in the beginning and 94.6 MB in the end (delta: 16.4 MB). Peak memory consumption was 16.9 MB. Max. memory is 8.0 GB. [2021-02-22 02:23:39,876 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39 ms. Allocated memory is still 161.5 MB. Free memory was 133.9 MB in the beginning and 133.7 MB in the end (delta: 215.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 316.44 ms. Allocated memory is still 161.5 MB. Free memory was 137.8 MB in the beginning and 128.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 72.42 ms. Allocated memory is still 161.5 MB. Free memory was 128.1 MB in the beginning and 126.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 565.29 ms. Allocated memory is still 161.5 MB. Free memory was 126.5 MB in the beginning and 111.4 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1548.76 ms. Allocated memory is still 161.5 MB. Free memory was 111.0 MB in the beginning and 94.6 MB in the end (delta: 16.4 MB). Peak memory consumption was 16.9 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_65; [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: 1.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.4s, 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, 0.1s 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...