/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 22:38:05,399 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 22:38:05,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 22:38:05,457 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 22:38:05,458 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 22:38:05,463 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 22:38:05,468 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 22:38:05,477 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 22:38:05,480 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 22:38:05,488 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 22:38:05,490 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 22:38:05,491 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 22:38:05,491 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 22:38:05,495 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 22:38:05,497 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 22:38:05,499 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 22:38:05,503 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 22:38:05,524 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 22:38:05,530 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 22:38:05,534 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 22:38:05,536 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 22:38:05,537 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 22:38:05,538 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 22:38:05,541 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 22:38:05,549 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-23 22:38:05,549 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-23 22:38:05,550 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-23 22:38:05,551 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-23 22:38:05,553 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-23 22:38:05,554 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-23 22:38:05,554 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-23 22:38:05,555 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-23 22:38:05,557 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-23 22:38:05,558 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-23 22:38:05,559 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-23 22:38:05,559 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-23 22:38:05,560 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-23 22:38:05,560 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-23 22:38:05,560 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 22:38:05,561 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 22:38:05,562 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 22:38:05,563 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 22:38:05,580 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 22:38:05,580 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 22:38:05,585 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 22:38:05,585 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 22:38:05,586 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 22:38:05,586 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 22:38:05,586 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 22:38:05,586 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 22:38:05,587 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 22:38:05,587 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 22:38:05,588 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 22:38:05,588 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 22:38:05,589 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 22:38:05,589 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 22:38:05,589 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 22:38:05,589 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 22:38:05,590 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 22:38:05,590 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 22:38:05,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 22:38:05,590 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 22:38:05,590 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 22:38:05,591 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 22:38:05,591 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-23 22:38:05,984 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 22:38:06,012 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 22:38:06,016 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 22:38:06,018 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 22:38:06,019 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 22:38:06,020 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c [2021-02-23 22:38:06,096 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/222d66eb7/46e2b560c0ba4c819dc994f48cdc6347/FLAG49dba6a40 [2021-02-23 22:38:06,697 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 22:38:06,698 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c [2021-02-23 22:38:06,710 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/222d66eb7/46e2b560c0ba4c819dc994f48cdc6347/FLAG49dba6a40 [2021-02-23 22:38:07,066 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/222d66eb7/46e2b560c0ba4c819dc994f48cdc6347 [2021-02-23 22:38:07,070 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 22:38:07,089 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 22:38:07,092 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 22:38:07,092 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 22:38:07,097 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 22:38:07,098 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:38:07" (1/1) ... [2021-02-23 22:38:07,100 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63442433 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:38:07, skipping insertion in model container [2021-02-23 22:38:07,100 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:38:07" (1/1) ... [2021-02-23 22:38:07,112 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 22:38:07,129 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 22:38:07,362 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] [2021-02-23 22:38:07,370 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 22:38:07,387 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 22:38:07,404 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] [2021-02-23 22:38:07,405 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 22:38:07,422 INFO L208 MainTranslator]: Completed translation [2021-02-23 22:38:07,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:38:07 WrapperNode [2021-02-23 22:38:07,423 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 22:38:07,424 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 22:38:07,424 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 22:38:07,425 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 22:38:07,439 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:38:07" (1/1) ... [2021-02-23 22:38:07,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:38:07" (1/1) ... [2021-02-23 22:38:07,447 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:38:07" (1/1) ... [2021-02-23 22:38:07,447 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:38:07" (1/1) ... [2021-02-23 22:38:07,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:38:07" (1/1) ... [2021-02-23 22:38:07,456 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:38:07" (1/1) ... [2021-02-23 22:38:07,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:38:07" (1/1) ... [2021-02-23 22:38:07,459 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 22:38:07,461 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 22:38:07,461 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 22:38:07,461 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 22:38:07,462 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:38:07" (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 [2021-02-23 22:38:07,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 22:38:07,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 22:38:07,564 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 22:38:07,564 INFO L138 BoogieDeclarations]: Found implementation of procedure A [2021-02-23 22:38:07,564 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 22:38:07,565 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 22:38:07,565 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 22:38:07,565 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 22:38:07,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 22:38:07,565 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 22:38:07,566 INFO L130 BoogieDeclarations]: Found specification of procedure A [2021-02-23 22:38:07,566 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 22:38:07,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 22:38:07,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 22:38:07,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 22:38:07,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 22:38:07,567 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 22:38:07,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 22:38:07,904 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 22:38:07,904 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-23 22:38:07,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:38:07 BoogieIcfgContainer [2021-02-23 22:38:07,906 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 22:38:07,908 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 22:38:07,909 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 22:38:07,912 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 22:38:07,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 10:38:07" (1/3) ... [2021-02-23 22:38:07,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@338d739 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:38:07, skipping insertion in model container [2021-02-23 22:38:07,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:38:07" (2/3) ... [2021-02-23 22:38:07,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@338d739 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:38:07, skipping insertion in model container [2021-02-23 22:38:07,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:38:07" (3/3) ... [2021-02-23 22:38:07,916 INFO L111 eAbstractionObserver]: Analyzing ICFG BallRajamani-SPIN2000-Fig1.c [2021-02-23 22:38:07,924 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 22:38:07,929 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 22:38:07,950 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 22:38:07,977 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 22:38:07,978 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 22:38:07,978 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-23 22:38:07,978 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 22:38:07,978 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 22:38:07,978 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 22:38:07,978 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 22:38:07,979 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 22:38:07,995 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2021-02-23 22:38:08,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-23 22:38:08,007 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:38:08,008 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] [2021-02-23 22:38:08,008 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:38:08,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:38:08,015 INFO L82 PathProgramCache]: Analyzing trace with hash -278226396, now seen corresponding path program 1 times [2021-02-23 22:38:08,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:38:08,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699687224] [2021-02-23 22:38:08,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:38:08,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:08,336 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:08,338 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:08,353 WARN L141 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-02-23 22:38:08,354 WARN L147 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size 9 [2021-02-23 22:38:08,373 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:08,374 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:08,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:38:08,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:08,436 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:08,437 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:08,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-23 22:38:08,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:08,469 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:08,470 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:38:08,479 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:08,480 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:38:08,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-02-23 22:38:08,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:08,523 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:08,524 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:08,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-23 22:38:08,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699687224] [2021-02-23 22:38:08,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:38:08,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-02-23 22:38:08,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298648148] [2021-02-23 22:38:08,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-23 22:38:08,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:38:08,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-23 22:38:08,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-23 22:38:08,582 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 7 states. [2021-02-23 22:38:09,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:38:09,041 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2021-02-23 22:38:09,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-23 22:38:09,043 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2021-02-23 22:38:09,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:38:09,053 INFO L225 Difference]: With dead ends: 69 [2021-02-23 22:38:09,053 INFO L226 Difference]: Without dead ends: 37 [2021-02-23 22:38:09,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-02-23 22:38:09,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-02-23 22:38:09,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-02-23 22:38:09,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-02-23 22:38:09,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-02-23 22:38:09,112 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 37 [2021-02-23 22:38:09,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:38:09,113 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-02-23 22:38:09,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-23 22:38:09,113 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-02-23 22:38:09,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-23 22:38:09,117 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:38:09,117 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] [2021-02-23 22:38:09,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 22:38:09,118 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:38:09,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:38:09,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1413678012, now seen corresponding path program 1 times [2021-02-23 22:38:09,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:38:09,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [753219873] [2021-02-23 22:38:09,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:38:09,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 22:38:09,163 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 22:38:09,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 22:38:09,200 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 22:38:09,239 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 22:38:09,241 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 22:38:09,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 22:38:09,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 10:38:09 BoogieIcfgContainer [2021-02-23 22:38:09,331 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 22:38:09,333 INFO L168 Benchmark]: Toolchain (without parser) took 2257.48 ms. Allocated memory is still 151.0 MB. Free memory was 127.1 MB in the beginning and 115.5 MB in the end (delta: 11.7 MB). Peak memory consumption was 13.1 MB. Max. memory is 8.0 GB. [2021-02-23 22:38:09,334 INFO L168 Benchmark]: CDTParser took 0.27 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. [2021-02-23 22:38:09,336 INFO L168 Benchmark]: CACSL2BoogieTranslator took 331.35 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 116.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 22:38:09,339 INFO L168 Benchmark]: Boogie Preprocessor took 35.61 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 115.4 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 22:38:09,340 INFO L168 Benchmark]: RCFGBuilder took 445.65 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 132.5 MB in the end (delta: -17.1 MB). Peak memory consumption was 18.6 MB. Max. memory is 8.0 GB. [2021-02-23 22:38:09,342 INFO L168 Benchmark]: TraceAbstraction took 1422.98 ms. Allocated memory is still 151.0 MB. Free memory was 132.0 MB in the beginning and 115.5 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 8.0 GB. [2021-02-23 22:38:09,349 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 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 331.35 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 116.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.61 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 115.4 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 445.65 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 132.5 MB in the end (delta: -17.1 MB). Peak memory consumption was 18.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1422.98 ms. Allocated memory is still 151.0 MB. Free memory was 132.0 MB in the beginning and 115.5 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 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; VAL [\old(g)=52, g=0] [L28] int g = __VERIFIER_nondet_int(); VAL [\old(g)=0, __VERIFIER_nondet_int()=6, g=0, g=6] [L29] int h = !g; VAL [\old(g)=0, g=6, g=0, h=0] [L30] CALL A(g,h) VAL [\old(a1)=6, \old(a2)=0, \old(g)=0, g=0] [L19] COND TRUE \read(a1) VAL [\old(a1)=6, \old(a2)=0, \old(g)=0, a1=6, a2=0, g=0] [L20] CALL A(a2,a1) VAL [\old(a1)=0, \old(a2)=6, \old(g)=0, g=0] [L19] COND FALSE !(\read(a1)) VAL [\old(a1)=0, \old(a2)=6, \old(g)=0, a1=0, a2=6, g=0] [L22] g = a2 VAL [\old(a1)=0, \old(a2)=6, \old(g)=0, a1=0, a2=6, g=6] [L20] RET A(a2,a1) VAL [\old(a1)=6, \old(a2)=0, \old(g)=0, A(a2,a1)=-1, a1=6, a2=0, g=6] [L30] RET A(g,h) VAL [\old(g)=0, A(g,h)=-2, g=6, g=6, h=0] [L31] CALL A(g,h) VAL [\old(a1)=6, \old(a2)=0, \old(g)=6, g=6] [L19] COND TRUE \read(a1) VAL [\old(a1)=6, \old(a2)=0, \old(g)=6, a1=6, a2=0, g=6] [L20] CALL A(a2,a1) VAL [\old(a1)=0, \old(a2)=6, \old(g)=6, g=6] [L19] COND FALSE !(\read(a1)) VAL [\old(a1)=0, \old(a2)=6, \old(g)=6, a1=0, a2=6, g=6] [L22] g = a2 VAL [\old(a1)=0, \old(a2)=6, \old(g)=6, a1=0, a2=6, g=6] [L20] RET A(a2,a1) VAL [\old(a1)=6, \old(a2)=0, \old(g)=6, A(a2,a1)=-3, a1=6, a2=0, g=6] [L31] RET A(g,h) VAL [\old(g)=0, A(g,h)=-4, g=6, g=6, h=0] [L32] COND TRUE \read(g) VAL [\old(g)=0, g=6, g=6, h=0] [L33] reach_error() VAL [\old(g)=0, g=6, g=6, h=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 2, TraceHistogramMax: 4, AutomataDifference: 0.4s, 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, 0.2s 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: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 90 NumberOfCodeBlocks, 90 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 4716 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 0 PerfectInterpolantSequences, 1/6 InterpolantCoveringCapability, 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...