/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-acceleration/multivar_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 02:21:35,305 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 02:21:35,309 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 02:21:35,371 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-22 02:21:35,371 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-22 02:21:35,375 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-22 02:21:35,379 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-22 02:21:35,387 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-22 02:21:35,391 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-22 02:21:35,397 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-22 02:21:35,398 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-22 02:21:35,400 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-22 02:21:35,401 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 02:21:35,405 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 02:21:35,407 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 02:21:35,409 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 02:21:35,413 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 02:21:35,426 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 02:21:35,435 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 02:21:35,438 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 02:21:35,442 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 02:21:35,444 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 02:21:35,446 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 02:21:35,448 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 02:21:35,459 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-22 02:21:35,460 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-22 02:21:35,463 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-22 02:21:35,465 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-22 02:21:35,467 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-22 02:21:35,468 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-22 02:21:35,468 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-22 02:21:35,469 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-22 02:21:35,471 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-22 02:21:35,473 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-22 02:21:35,474 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-22 02:21:35,474 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-22 02:21:35,475 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-22 02:21:35,475 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-22 02:21:35,475 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 02:21:35,476 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 02:21:35,477 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 02:21:35,483 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 02:21:35,510 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 02:21:35,510 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 02:21:35,515 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 02:21:35,516 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 02:21:35,516 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 02:21:35,516 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 02:21:35,516 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 02:21:35,517 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 02:21:35,517 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 02:21:35,517 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 02:21:35,518 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 02:21:35,519 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 02:21:35,519 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 02:21:35,520 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 02:21:35,520 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 02:21:35,520 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 02:21:35,520 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 02:21:35,521 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 02:21:35,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:21:35,521 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 02:21:35,521 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 02:21:35,521 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 02:21:35,522 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 02:21:35,522 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 02:21:35,954 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 02:21:35,984 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 02:21:35,987 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 02:21:35,989 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 02:21:35,990 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 02:21:35,991 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/multivar_1-1.c [2021-02-22 02:21:36,087 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f21e3ba66/1baa724dccb94a0cb82fd82f49a2a489/FLAG8ad504d70 [2021-02-22 02:21:36,725 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 02:21:36,726 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/multivar_1-1.c [2021-02-22 02:21:36,732 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f21e3ba66/1baa724dccb94a0cb82fd82f49a2a489/FLAG8ad504d70 [2021-02-22 02:21:37,101 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f21e3ba66/1baa724dccb94a0cb82fd82f49a2a489 [2021-02-22 02:21:37,105 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 02:21:37,118 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 02:21:37,120 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 02:21:37,120 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 02:21:37,127 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 02:21:37,128 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:21:37" (1/1) ... [2021-02-22 02:21:37,130 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5acfef23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:37, skipping insertion in model container [2021-02-22 02:21:37,130 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:21:37" (1/1) ... [2021-02-22 02:21:37,140 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 02:21:37,157 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 02:21:37,347 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-acceleration/multivar_1-1.c[374,387] [2021-02-22 02:21:37,366 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:21:37,374 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 02:21:37,388 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-acceleration/multivar_1-1.c[374,387] [2021-02-22 02:21:37,391 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:21:37,405 INFO L208 MainTranslator]: Completed translation [2021-02-22 02:21:37,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:37 WrapperNode [2021-02-22 02:21:37,406 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 02:21:37,407 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 02:21:37,407 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 02:21:37,407 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 02:21:37,420 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:37" (1/1) ... [2021-02-22 02:21:37,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:37" (1/1) ... [2021-02-22 02:21:37,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:37" (1/1) ... [2021-02-22 02:21:37,429 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:37" (1/1) ... [2021-02-22 02:21:37,435 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:37" (1/1) ... [2021-02-22 02:21:37,439 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:37" (1/1) ... [2021-02-22 02:21:37,441 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:37" (1/1) ... [2021-02-22 02:21:37,443 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 02:21:37,444 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 02:21:37,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 02:21:37,445 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 02:21:37,446 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:37" (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 02:21:37,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 02:21:37,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 02:21:37,566 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 02:21:37,566 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-22 02:21:37,567 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 02:21:37,567 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 02:21:37,567 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 02:21:37,568 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 02:21:37,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 02:21:37,569 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-22 02:21:37,569 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-22 02:21:37,570 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 02:21:37,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 02:21:37,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 02:21:37,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 02:21:37,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 02:21:37,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 02:21:37,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 02:21:38,027 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 02:21:38,027 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-22 02:21:38,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:21:38 BoogieIcfgContainer [2021-02-22 02:21:38,030 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 02:21:38,031 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 02:21:38,032 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 02:21:38,035 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 02:21:38,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:21:37" (1/3) ... [2021-02-22 02:21:38,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d519a8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:21:38, skipping insertion in model container [2021-02-22 02:21:38,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:37" (2/3) ... [2021-02-22 02:21:38,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d519a8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:21:38, skipping insertion in model container [2021-02-22 02:21:38,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:21:38" (3/3) ... [2021-02-22 02:21:38,061 INFO L111 eAbstractionObserver]: Analyzing ICFG multivar_1-1.c [2021-02-22 02:21:38,069 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 02:21:38,074 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 02:21:38,110 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 02:21:38,157 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 02:21:38,157 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 02:21:38,158 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 02:21:38,158 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 02:21:38,161 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 02:21:38,161 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 02:21:38,161 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 02:21:38,162 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 02:21:38,186 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2021-02-22 02:21:38,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-22 02:21:38,196 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:21:38,197 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] [2021-02-22 02:21:38,198 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:21:38,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:21:38,205 INFO L82 PathProgramCache]: Analyzing trace with hash -483578508, now seen corresponding path program 1 times [2021-02-22 02:21:38,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:21:38,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001292925] [2021-02-22 02:21:38,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:21:38,306 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:21:38,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:38,488 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:38,491 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:38,493 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:38,494 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:38,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:21:38,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:38,613 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:38,614 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:38,619 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 02:21:38,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001292925] [2021-02-22 02:21:38,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:21:38,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-22 02:21:38,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897090411] [2021-02-22 02:21:38,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-22 02:21:38,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:21:38,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-22 02:21:38,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 02:21:38,650 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 3 states. [2021-02-22 02:21:38,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:21:38,758 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2021-02-22 02:21:38,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-22 02:21:38,760 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2021-02-22 02:21:38,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:21:38,768 INFO L225 Difference]: With dead ends: 45 [2021-02-22 02:21:38,769 INFO L226 Difference]: Without dead ends: 27 [2021-02-22 02:21:38,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 02:21:38,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-02-22 02:21:38,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-02-22 02:21:38,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-02-22 02:21:38,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-02-22 02:21:38,829 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 20 [2021-02-22 02:21:38,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:21:38,829 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-02-22 02:21:38,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-22 02:21:38,830 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-02-22 02:21:38,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-22 02:21:38,831 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:21:38,831 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] [2021-02-22 02:21:38,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 02:21:38,831 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:21:38,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:21:38,833 INFO L82 PathProgramCache]: Analyzing trace with hash -492813718, now seen corresponding path program 1 times [2021-02-22 02:21:38,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:21:38,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784490819] [2021-02-22 02:21:38,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:21:38,837 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:21:38,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:38,969 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:38,970 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:38,973 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:38,975 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:21:38,997 WARN L141 QuantifierPusher]: treesize reduction 6, result has 92.1 percent of original size [2021-02-22 02:21:39,000 WARN L147 QuantifierPusher]: treesize reduction 6, result has 92.1 percent of original size 70 [2021-02-22 02:21:39,011 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:39,012 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:21:39,017 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:39,018 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:21:39,023 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:39,024 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:39,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:21:39,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:39,065 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:39,066 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:39,068 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 02:21:39,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784490819] [2021-02-22 02:21:39,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:21:39,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-22 02:21:39,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939078780] [2021-02-22 02:21:39,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-22 02:21:39,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:21:39,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-22 02:21:39,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-22 02:21:39,073 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 6 states. [2021-02-22 02:21:39,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:21:39,339 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2021-02-22 02:21:39,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-22 02:21:39,340 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2021-02-22 02:21:39,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:21:39,345 INFO L225 Difference]: With dead ends: 35 [2021-02-22 02:21:39,345 INFO L226 Difference]: Without dead ends: 30 [2021-02-22 02:21:39,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-22 02:21:39,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-02-22 02:21:39,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-02-22 02:21:39,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-02-22 02:21:39,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-02-22 02:21:39,373 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 20 [2021-02-22 02:21:39,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:21:39,373 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-02-22 02:21:39,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-22 02:21:39,374 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-02-22 02:21:39,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-22 02:21:39,375 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:21:39,375 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] [2021-02-22 02:21:39,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 02:21:39,375 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:21:39,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:21:39,376 INFO L82 PathProgramCache]: Analyzing trace with hash 2112061736, now seen corresponding path program 1 times [2021-02-22 02:21:39,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:21:39,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144815783] [2021-02-22 02:21:39,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:21:39,511 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:39,541 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-22 02:21:39,554 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:39,561 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-22 02:21:39,576 WARN L141 QuantifierPusher]: treesize reduction 6, result has 76.0 percent of original size [2021-02-22 02:21:39,598 INFO L723 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2021-02-22 02:21:39,622 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:39,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:39,630 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:39,648 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-22 02:21:39,655 WARN L147 QuantifierPusher]: treesize reduction 6, result has 76.0 percent of original size 19 [2021-02-22 02:21:39,663 WARN L141 QuantifierPusher]: treesize reduction 10, result has 79.6 percent of original size [2021-02-22 02:21:39,675 WARN L147 QuantifierPusher]: treesize reduction 10, result has 79.6 percent of original size 39 [2021-02-22 02:21:39,679 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:39,688 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-22 02:21:39,695 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:39,700 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-22 02:21:39,710 WARN L141 QuantifierPusher]: treesize reduction 6, result has 76.0 percent of original size [2021-02-22 02:21:39,713 INFO L723 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2021-02-22 02:21:39,720 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:39,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:39,725 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:39,735 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-22 02:21:39,739 WARN L147 QuantifierPusher]: treesize reduction 6, result has 76.0 percent of original size 19 [2021-02-22 02:21:39,748 WARN L141 QuantifierPusher]: treesize reduction 10, result has 79.6 percent of original size [2021-02-22 02:21:39,758 WARN L147 QuantifierPusher]: treesize reduction 10, result has 79.6 percent of original size 39 [2021-02-22 02:21:39,763 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:39,768 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-22 02:21:39,772 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:39,777 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-22 02:21:39,788 WARN L141 QuantifierPusher]: treesize reduction 8, result has 72.4 percent of original size [2021-02-22 02:21:39,794 INFO L723 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2021-02-22 02:21:39,798 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:39,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:39,802 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:39,813 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-22 02:21:39,817 WARN L147 QuantifierPusher]: treesize reduction 8, result has 72.4 percent of original size 21 [2021-02-22 02:21:39,831 WARN L141 QuantifierPusher]: treesize reduction 10, result has 80.8 percent of original size [2021-02-22 02:21:39,839 WARN L147 QuantifierPusher]: treesize reduction 10, result has 80.8 percent of original size 42 [2021-02-22 02:21:39,841 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-22 02:21:39,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:40,072 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:40,074 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:40,074 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:40,075 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:21:40,083 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:40,085 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-22 02:21:40,090 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:40,091 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:21:40,104 WARN L141 QuantifierPusher]: treesize reduction 27, result has 91.3 percent of original size [2021-02-22 02:21:40,113 WARN L147 QuantifierPusher]: treesize reduction 27, result has 91.3 percent of original size 283 [2021-02-22 02:21:40,211 WARN L141 QuantifierPusher]: treesize reduction 27, result has 92.2 percent of original size [2021-02-22 02:21:40,220 WARN L147 QuantifierPusher]: treesize reduction 27, result has 92.2 percent of original size 319 [2021-02-22 02:21:40,235 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:40,236 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:21:40,244 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:40,245 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:21:40,253 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:40,254 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:40,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:21:40,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:40,313 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:40,314 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:40,318 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 02:21:40,322 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.7 percent of original size [2021-02-22 02:21:40,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:40,326 WARN L141 QuantifierPusher]: treesize reduction 4, result has 84.0 percent of original size [2021-02-22 02:21:40,328 WARN L147 QuantifierPusher]: treesize reduction 4, result has 84.0 percent of original size 21 [2021-02-22 02:21:40,330 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.7 percent of original size 42 [2021-02-22 02:21:40,332 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.4 percent of original size [2021-02-22 02:21:40,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:40,336 WARN L141 QuantifierPusher]: treesize reduction 4, result has 84.0 percent of original size [2021-02-22 02:21:40,338 WARN L147 QuantifierPusher]: treesize reduction 4, result has 84.0 percent of original size 21 [2021-02-22 02:21:40,339 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.4 percent of original size 38 [2021-02-22 02:21:40,366 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:40,367 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-22 02:21:40,380 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:40,381 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-22 02:21:40,399 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:40,402 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-22 02:21:40,423 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:40,424 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-22 02:21:40,443 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:40,444 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-22 02:21:40,467 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:40,469 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-02-22 02:21:40,495 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:40,496 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-22 02:21:40,522 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:40,523 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:40,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144815783] [2021-02-22 02:21:40,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:21:40,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-02-22 02:21:40,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158472927] [2021-02-22 02:21:40,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-22 02:21:40,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:21:40,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-22 02:21:40,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-02-22 02:21:40,527 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 14 states. [2021-02-22 02:21:41,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:21:41,105 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-02-22 02:21:41,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-22 02:21:41,106 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2021-02-22 02:21:41,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:21:41,107 INFO L225 Difference]: With dead ends: 30 [2021-02-22 02:21:41,107 INFO L226 Difference]: Without dead ends: 0 [2021-02-22 02:21:41,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-02-22 02:21:41,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-22 02:21:41,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-22 02:21:41,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-22 02:21:41,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-22 02:21:41,109 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2021-02-22 02:21:41,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:21:41,109 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-22 02:21:41,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-22 02:21:41,110 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-22 02:21:41,110 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-22 02:21:41,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-22 02:21:41,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-22 02:21:41,449 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-22 02:21:41,449 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-22 02:21:41,449 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-22 02:21:41,450 INFO L192 CegarLoopUtils]: At program point L3-2(line 3) the Hoare annotation is: true [2021-02-22 02:21:41,450 INFO L192 CegarLoopUtils]: At program point L3-3(line 3) the Hoare annotation is: true [2021-02-22 02:21:41,450 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-22 02:21:41,450 INFO L192 CegarLoopUtils]: At program point L3-4(line 3) the Hoare annotation is: true [2021-02-22 02:21:41,450 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-22 02:21:41,450 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 3) the Hoare annotation is: true [2021-02-22 02:21:41,451 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-22 02:21:41,451 INFO L192 CegarLoopUtils]: At program point L3(line 3) the Hoare annotation is: true [2021-02-22 02:21:41,451 INFO L192 CegarLoopUtils]: At program point L3-1(line 3) the Hoare annotation is: true [2021-02-22 02:21:41,451 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-22 02:21:41,451 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-22 02:21:41,451 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-22 02:21:41,452 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-22 02:21:41,452 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-22 02:21:41,452 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 13 23) the Hoare annotation is: true [2021-02-22 02:21:41,452 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 13 23) the Hoare annotation is: true [2021-02-22 02:21:41,452 INFO L185 CegarLoopUtils]: At program point L19(line 19) the Hoare annotation is: (and (< (mod main_~y~0 4294967296) 1024) (= main_~x~0 (+ main_~y~0 1))) [2021-02-22 02:21:41,452 INFO L185 CegarLoopUtils]: At program point L18(line 18) the Hoare annotation is: (and (< (mod main_~x~0 4294967296) 1024) (= main_~y~0 main_~x~0)) [2021-02-22 02:21:41,453 INFO L185 CegarLoopUtils]: At program point L19-1(line 19) the Hoare annotation is: (and (< (mod main_~y~0 4294967296) 1024) (= |main_#t~post9| main_~y~0) (= main_~x~0 (+ main_~y~0 1))) [2021-02-22 02:21:41,453 INFO L185 CegarLoopUtils]: At program point L18-1(line 18) the Hoare annotation is: (and (< (mod main_~x~0 4294967296) 1024) (= |main_#t~post8| main_~x~0) (= main_~y~0 main_~x~0)) [2021-02-22 02:21:41,453 INFO L185 CegarLoopUtils]: At program point L19-2(line 19) the Hoare annotation is: (let ((.cse0 (+ |main_#t~post9| 1))) (and (= main_~x~0 .cse0) (< (mod |main_#t~post9| 4294967296) 1024) (= main_~y~0 .cse0))) [2021-02-22 02:21:41,453 INFO L185 CegarLoopUtils]: At program point L18-2(line 18) the Hoare annotation is: (and (= |main_#t~post8| main_~y~0) (= main_~x~0 (+ |main_#t~post8| 1)) (< (mod |main_#t~post8| 4294967296) 1024)) [2021-02-22 02:21:41,454 INFO L192 CegarLoopUtils]: At program point L15(line 15) the Hoare annotation is: true [2021-02-22 02:21:41,454 INFO L185 CegarLoopUtils]: At program point L17-2(lines 17 20) the Hoare annotation is: (= main_~y~0 main_~x~0) [2021-02-22 02:21:41,454 INFO L192 CegarLoopUtils]: At program point L14(line 14) the Hoare annotation is: true [2021-02-22 02:21:41,454 INFO L185 CegarLoopUtils]: At program point L17-3(lines 17 20) the Hoare annotation is: (= main_~y~0 main_~x~0) [2021-02-22 02:21:41,454 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 13 23) the Hoare annotation is: true [2021-02-22 02:21:41,454 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2021-02-22 02:21:41,455 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 6 11) the Hoare annotation is: true [2021-02-22 02:21:41,455 INFO L185 CegarLoopUtils]: At program point L8(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-22 02:21:41,455 INFO L185 CegarLoopUtils]: At program point L7(lines 7 9) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-02-22 02:21:41,455 INFO L185 CegarLoopUtils]: At program point L8-1(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-22 02:21:41,455 INFO L192 CegarLoopUtils]: At program point L7-2(lines 6 11) the Hoare annotation is: true [2021-02-22 02:21:41,455 INFO L185 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-22 02:21:41,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 02:21:41 BoogieIcfgContainer [2021-02-22 02:21:41,473 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 02:21:41,475 INFO L168 Benchmark]: Toolchain (without parser) took 4367.64 ms. Allocated memory was 155.2 MB in the beginning and 186.6 MB in the end (delta: 31.5 MB). Free memory was 131.9 MB in the beginning and 79.0 MB in the end (delta: 52.9 MB). Peak memory consumption was 84.9 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:41,475 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 155.2 MB. Free memory is still 129.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:21:41,476 INFO L168 Benchmark]: CACSL2BoogieTranslator took 285.82 ms. Allocated memory is still 155.2 MB. Free memory was 130.9 MB in the beginning and 121.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:41,477 INFO L168 Benchmark]: Boogie Preprocessor took 36.67 ms. Allocated memory is still 155.2 MB. Free memory was 121.6 MB in the beginning and 120.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:41,477 INFO L168 Benchmark]: RCFGBuilder took 585.42 ms. Allocated memory is still 155.2 MB. Free memory was 120.1 MB in the beginning and 106.8 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:41,478 INFO L168 Benchmark]: TraceAbstraction took 3441.72 ms. Allocated memory was 155.2 MB in the beginning and 186.6 MB in the end (delta: 31.5 MB). Free memory was 106.2 MB in the beginning and 79.0 MB in the end (delta: 27.3 MB). Peak memory consumption was 59.7 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:41,481 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 155.2 MB. Free memory is still 129.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 285.82 ms. Allocated memory is still 155.2 MB. Free memory was 130.9 MB in the beginning and 121.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.67 ms. Allocated memory is still 155.2 MB. Free memory was 121.6 MB in the beginning and 120.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 585.42 ms. Allocated memory is still 155.2 MB. Free memory was 120.1 MB in the beginning and 106.8 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3441.72 ms. Allocated memory was 155.2 MB in the beginning and 186.6 MB in the end (delta: 31.5 MB). Free memory was 106.2 MB in the beginning and 79.0 MB in the end (delta: 27.3 MB). Peak memory consumption was 59.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: y == x - ProcedureContractResult [Line: 13]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 6]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.9s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 73 SDtfs, 59 SDslu, 125 SDs, 0 SdLazy, 164 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred 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, 3 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 34 LocationsWithAnnotation, 48 PreInvPairs, 61 NumberOfFragments, 151 HoareAnnotationTreeSize, 48 FomulaSimplifications, 361 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 34 FomulaSimplificationsInter, 620 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, 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 correct! Received shutdown request...