/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/recursive/BallRajamani-SPIN2000-Fig1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 01:32:43,594 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 01:32:43,598 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 01:32:43,634 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 01:32:43,652 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 01:32:43,655 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 01:32:43,661 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 01:32:43,663 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 01:32:43,665 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 01:32:43,688 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 01:32:43,697 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 01:32:43,701 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 01:32:43,705 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 01:32:43,707 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 01:32:43,710 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 01:32:43,712 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 01:32:43,721 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 01:32:43,740 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 01:32:43,741 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 01:32:43,742 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 01:32:43,743 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 01:32:43,768 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 01:32:43,768 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 01:32:43,773 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 01:32:43,773 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 01:32:43,773 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 01:32:43,773 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 01:32:43,774 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 01:32:43,774 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 01:32:43,774 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 01:32:43,774 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 01:32:43,776 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 01:32:43,776 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 01:32:43,776 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 01:32:43,777 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 01:32:43,777 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 01:32:43,777 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 01:32:43,777 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 01:32:43,777 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 01:32:43,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 01:32:43,778 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 01:32:43,778 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 01:32:43,778 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 01:32:43,779 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 01:32:43,779 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 01:32:44,256 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 01:32:44,285 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 01:32:44,289 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 01:32:44,290 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 01:32:44,291 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 01:32:44,292 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c [2021-02-22 01:32:44,379 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9cd700c54/794987385b714db68184de81aac5c9c9/FLAG4280d6f9d [2021-02-22 01:32:45,110 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 01:32:45,111 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c [2021-02-22 01:32:45,119 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9cd700c54/794987385b714db68184de81aac5c9c9/FLAG4280d6f9d [2021-02-22 01:32:45,467 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9cd700c54/794987385b714db68184de81aac5c9c9 [2021-02-22 01:32:45,470 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 01:32:45,484 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 01:32:45,486 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 01:32:45,487 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 01:32:45,491 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 01:32:45,492 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 01:32:45" (1/1) ... [2021-02-22 01:32:45,494 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f0ee4ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:32:45, skipping insertion in model container [2021-02-22 01:32:45,494 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 01:32:45" (1/1) ... [2021-02-22 01:32:45,503 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 01:32:45,520 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 01:32:45,688 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c[718,731] [2021-02-22 01:32:45,692 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 01:32:45,703 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 01:32:45,721 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c[718,731] [2021-02-22 01:32:45,721 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 01:32:45,739 INFO L208 MainTranslator]: Completed translation [2021-02-22 01:32:45,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:32:45 WrapperNode [2021-02-22 01:32:45,740 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 01:32:45,741 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 01:32:45,741 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 01:32:45,741 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 01:32:45,755 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:32:45" (1/1) ... [2021-02-22 01:32:45,756 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:32:45" (1/1) ... [2021-02-22 01:32:45,764 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:32:45" (1/1) ... [2021-02-22 01:32:45,765 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:32:45" (1/1) ... [2021-02-22 01:32:45,771 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:32:45" (1/1) ... [2021-02-22 01:32:45,773 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:32:45" (1/1) ... [2021-02-22 01:32:45,775 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:32:45" (1/1) ... [2021-02-22 01:32:45,777 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 01:32:45,778 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 01:32:45,779 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 01:32:45,779 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 01:32:45,780 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:32:45" (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 01:32:45,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 01:32:45,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 01:32:45,883 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 01:32:45,884 INFO L138 BoogieDeclarations]: Found implementation of procedure A [2021-02-22 01:32:45,884 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 01:32:45,884 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 01:32:45,884 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 01:32:45,884 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 01:32:45,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 01:32:45,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-22 01:32:45,885 INFO L130 BoogieDeclarations]: Found specification of procedure A [2021-02-22 01:32:45,885 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 01:32:45,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 01:32:45,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 01:32:45,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 01:32:45,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 01:32:45,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 01:32:45,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 01:32:46,259 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 01:32:46,259 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-22 01:32:46,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 01:32:46 BoogieIcfgContainer [2021-02-22 01:32:46,261 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 01:32:46,263 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 01:32:46,263 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 01:32:46,267 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 01:32:46,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 01:32:45" (1/3) ... [2021-02-22 01:32:46,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20f8b5e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 01:32:46, skipping insertion in model container [2021-02-22 01:32:46,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:32:45" (2/3) ... [2021-02-22 01:32:46,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20f8b5e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 01:32:46, skipping insertion in model container [2021-02-22 01:32:46,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 01:32:46" (3/3) ... [2021-02-22 01:32:46,278 INFO L111 eAbstractionObserver]: Analyzing ICFG BallRajamani-SPIN2000-Fig1.c [2021-02-22 01:32:46,287 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 01:32:46,293 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 01:32:46,319 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 01:32:46,348 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 01:32:46,349 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 01:32:46,349 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 01:32:46,349 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 01:32:46,349 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 01:32:46,349 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 01:32:46,350 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 01:32:46,350 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 01:32:46,368 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2021-02-22 01:32:46,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-22 01:32:46,380 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:32:46,381 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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] [2021-02-22 01:32:46,382 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:32:46,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:32:46,389 INFO L82 PathProgramCache]: Analyzing trace with hash -278226396, now seen corresponding path program 1 times [2021-02-22 01:32:46,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:32:46,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403680496] [2021-02-22 01:32:46,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:32:46,486 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:32:46,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:32:46,725 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:32:46,727 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:32:46,741 WARN L141 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-02-22 01:32:46,742 WARN L147 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size 9 [2021-02-22 01:32:46,764 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:32:46,765 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:32:46,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:32:46,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:32:46,853 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:32:46,854 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:32:46,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-22 01:32:46,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:32:46,888 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:32:46,889 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:32:46,903 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:32:46,904 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:32:46,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-02-22 01:32:46,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:32:46,929 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:32:46,930 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:32:46,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-22 01:32:46,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403680496] [2021-02-22 01:32:46,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:32:46,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-22 01:32:46,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69402985] [2021-02-22 01:32:46,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-22 01:32:46,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:32:46,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-22 01:32:46,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-22 01:32:46,978 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 7 states. [2021-02-22 01:32:47,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:32:47,494 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2021-02-22 01:32:47,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-22 01:32:47,496 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2021-02-22 01:32:47,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:32:47,507 INFO L225 Difference]: With dead ends: 69 [2021-02-22 01:32:47,507 INFO L226 Difference]: Without dead ends: 37 [2021-02-22 01:32:47,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-02-22 01:32:47,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-02-22 01:32:47,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-02-22 01:32:47,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-02-22 01:32:47,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-02-22 01:32:47,567 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 37 [2021-02-22 01:32:47,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:32:47,568 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-02-22 01:32:47,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-22 01:32:47,568 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-02-22 01:32:47,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-22 01:32:47,571 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:32:47,572 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 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] [2021-02-22 01:32:47,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 01:32:47,573 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:32:47,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:32:47,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1413678012, now seen corresponding path program 1 times [2021-02-22 01:32:47,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:32:47,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2143392756] [2021-02-22 01:32:47,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:32:47,579 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:32:47,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 01:32:47,613 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 01:32:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 01:32:47,647 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 01:32:47,687 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-22 01:32:47,687 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-22 01:32:47,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 01:32:47,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 01:32:47 BoogieIcfgContainer [2021-02-22 01:32:47,706 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 01:32:47,707 INFO L168 Benchmark]: Toolchain (without parser) took 2234.84 ms. Allocated memory is still 151.0 MB. Free memory was 127.7 MB in the beginning and 116.0 MB in the end (delta: 11.7 MB). Peak memory consumption was 12.0 MB. Max. memory is 8.0 GB. [2021-02-22 01:32:47,708 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 124.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 01:32:47,709 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.71 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 117.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-22 01:32:47,710 INFO L168 Benchmark]: Boogie Preprocessor took 36.25 ms. Allocated memory is still 151.0 MB. Free memory was 117.3 MB in the beginning and 116.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-22 01:32:47,711 INFO L168 Benchmark]: RCFGBuilder took 483.02 ms. Allocated memory is still 151.0 MB. Free memory was 115.9 MB in the beginning and 132.7 MB in the end (delta: -16.8 MB). Peak memory consumption was 16.3 MB. Max. memory is 8.0 GB. [2021-02-22 01:32:47,712 INFO L168 Benchmark]: TraceAbstraction took 1442.84 ms. Allocated memory is still 151.0 MB. Free memory was 132.7 MB in the beginning and 116.0 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 8.0 GB. [2021-02-22 01:32:47,716 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 124.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 253.71 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 117.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.25 ms. Allocated memory is still 151.0 MB. Free memory was 117.3 MB in the beginning and 116.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 483.02 ms. Allocated memory is still 151.0 MB. Free memory was 115.9 MB in the beginning and 132.7 MB in the end (delta: -16.8 MB). Peak memory consumption was 16.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1442.84 ms. Allocated memory is still 151.0 MB. Free memory was 132.7 MB in the beginning and 116.0 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 33]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L16] int g; [L28] int g = __VERIFIER_nondet_int(); [L29] int h = !g; [L30] CALL A(g,h) [L19] COND TRUE \read(a1) [L20] CALL A(a2,a1) [L19] COND FALSE !(\read(a1)) [L22] g = a2 [L20] RET A(a2,a1) [L30] RET A(g,h) [L31] CALL A(g,h) [L19] COND TRUE \read(a1) [L20] CALL A(a2,a1) [L19] COND FALSE !(\read(a1)) [L22] g = a2 [L20] RET A(a2,a1) [L31] RET A(g,h) [L32] COND TRUE \read(g) [L33] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.3s, OverallIterations: 2, TraceHistogramMax: 4, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 36 SDtfs, 27 SDslu, 91 SDs, 0 SdLazy, 83 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred 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 proved your program to be incorrect! Received shutdown request...