/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/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/n.c11.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 18:47:59,140 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 18:47:59,143 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 18:47:59,203 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 18:47:59,311 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 18:47:59,312 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 18:47:59,313 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 18:47:59,319 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 18:47:59,346 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 18:47:59,347 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 18:47:59,351 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 18:47:59,351 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 18:47:59,351 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 18:47:59,352 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 18:47:59,352 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 18:47:59,352 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 18:47:59,352 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 18:47:59,352 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 18:47:59,353 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 18:47:59,354 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 18:47:59,354 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 18:47:59,355 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 18:47:59,355 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 18:47:59,355 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 18:47:59,355 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 18:47:59,356 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 18:47:59,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 18:47:59,356 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 18:47:59,356 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 18:47:59,357 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 18:47:59,357 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 18:47:59,756 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 18:47:59,787 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 18:47:59,791 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 18:47:59,792 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 18:47:59,793 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 18:47:59,794 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/n.c11.c [2021-02-23 18:47:59,891 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cde96d657/7dc5e81fb5744e08be04b7d3253e623f/FLAG44bb010e6 [2021-02-23 18:48:00,615 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 18:48:00,616 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c11.c [2021-02-23 18:48:00,623 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cde96d657/7dc5e81fb5744e08be04b7d3253e623f/FLAG44bb010e6 [2021-02-23 18:48:00,986 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cde96d657/7dc5e81fb5744e08be04b7d3253e623f [2021-02-23 18:48:00,995 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 18:48:01,011 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 18:48:01,019 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 18:48:01,019 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 18:48:01,023 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 18:48:01,024 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:48:00" (1/1) ... [2021-02-23 18:48:01,026 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6535505d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:01, skipping insertion in model container [2021-02-23 18:48:01,026 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:48:00" (1/1) ... [2021-02-23 18:48:01,036 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 18:48:01,055 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 18:48:01,248 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c11.c[317,330] [2021-02-23 18:48:01,265 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:48:01,276 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 18:48:01,291 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c11.c[317,330] [2021-02-23 18:48:01,296 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:48:01,314 INFO L208 MainTranslator]: Completed translation [2021-02-23 18:48:01,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:01 WrapperNode [2021-02-23 18:48:01,315 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 18:48:01,317 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 18:48:01,317 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 18:48:01,317 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 18:48:01,334 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:01" (1/1) ... [2021-02-23 18:48:01,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:01" (1/1) ... [2021-02-23 18:48:01,343 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:01" (1/1) ... [2021-02-23 18:48:01,344 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:01" (1/1) ... [2021-02-23 18:48:01,350 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:01" (1/1) ... [2021-02-23 18:48:01,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:01" (1/1) ... [2021-02-23 18:48:01,357 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:01" (1/1) ... [2021-02-23 18:48:01,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 18:48:01,360 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 18:48:01,360 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 18:48:01,361 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 18:48:01,362 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:01" (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 18:48:01,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 18:48:01,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 18:48:01,485 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 18:48:01,485 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-23 18:48:01,485 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 18:48:01,486 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 18:48:01,486 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 18:48:01,486 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 18:48:01,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 18:48:01,486 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-23 18:48:01,487 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-02-23 18:48:01,487 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 18:48:01,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 18:48:01,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 18:48:01,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 18:48:01,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 18:48:01,489 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 18:48:01,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 18:48:01,969 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 18:48:01,970 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-23 18:48:01,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:48:01 BoogieIcfgContainer [2021-02-23 18:48:01,975 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 18:48:01,999 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 18:48:01,999 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 18:48:02,005 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 18:48:02,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 06:48:00" (1/3) ... [2021-02-23 18:48:02,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b1499e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:48:02, skipping insertion in model container [2021-02-23 18:48:02,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:01" (2/3) ... [2021-02-23 18:48:02,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b1499e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:48:02, skipping insertion in model container [2021-02-23 18:48:02,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:48:01" (3/3) ... [2021-02-23 18:48:02,012 INFO L111 eAbstractionObserver]: Analyzing ICFG n.c11.c [2021-02-23 18:48:02,023 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 18:48:02,039 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 18:48:02,097 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 18:48:02,142 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 18:48:02,143 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 18:48:02,143 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 18:48:02,143 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 18:48:02,143 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 18:48:02,143 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 18:48:02,143 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 18:48:02,144 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 18:48:02,167 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2021-02-23 18:48:02,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-23 18:48:02,180 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:48:02,182 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] [2021-02-23 18:48:02,182 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:48:02,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:48:02,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1083844101, now seen corresponding path program 1 times [2021-02-23 18:48:02,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:48:02,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [39225378] [2021-02-23 18:48:02,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:48:02,301 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:48:02,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:48:02,488 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:02,491 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:02,492 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:02,493 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:02,615 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-02-23 18:48:02,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:48:02,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:48:02,671 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:02,672 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:02,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:48:02,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [39225378] [2021-02-23 18:48:02,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:48:02,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-23 18:48:02,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079353091] [2021-02-23 18:48:02,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-23 18:48:02,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:48:02,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-23 18:48:02,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 18:48:02,719 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2021-02-23 18:48:02,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:48:02,873 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-02-23 18:48:02,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-23 18:48:02,876 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2021-02-23 18:48:02,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:48:02,892 INFO L225 Difference]: With dead ends: 49 [2021-02-23 18:48:02,893 INFO L226 Difference]: Without dead ends: 29 [2021-02-23 18:48:02,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 18:48:02,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-02-23 18:48:02,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-02-23 18:48:02,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-02-23 18:48:02,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-02-23 18:48:02,970 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 20 [2021-02-23 18:48:02,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:48:02,970 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-02-23 18:48:02,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-23 18:48:02,971 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-02-23 18:48:02,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-23 18:48:02,973 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:48:02,973 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] [2021-02-23 18:48:02,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 18:48:02,974 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:48:02,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:48:02,975 INFO L82 PathProgramCache]: Analyzing trace with hash 232671822, now seen corresponding path program 1 times [2021-02-23 18:48:02,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:48:02,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [711048999] [2021-02-23 18:48:02,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:48:02,990 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:48:03,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:48:03,072 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:03,073 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:03,076 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:03,077 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:03,086 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:03,087 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:48:03,097 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:03,099 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:48:03,113 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:03,115 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:03,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:48:03,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:48:03,195 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:03,196 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:03,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:48:03,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [711048999] [2021-02-23 18:48:03,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:48:03,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 18:48:03,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963941559] [2021-02-23 18:48:03,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 18:48:03,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:48:03,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 18:48:03,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 18:48:03,202 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 6 states. [2021-02-23 18:48:03,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:48:03,549 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2021-02-23 18:48:03,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 18:48:03,550 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2021-02-23 18:48:03,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:48:03,551 INFO L225 Difference]: With dead ends: 53 [2021-02-23 18:48:03,552 INFO L226 Difference]: Without dead ends: 35 [2021-02-23 18:48:03,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-23 18:48:03,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-02-23 18:48:03,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-02-23 18:48:03,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-02-23 18:48:03,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-02-23 18:48:03,565 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 21 [2021-02-23 18:48:03,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:48:03,566 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-02-23 18:48:03,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 18:48:03,566 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-02-23 18:48:03,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-23 18:48:03,567 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:48:03,567 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:48:03,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 18:48:03,568 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:48:03,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:48:03,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1436452214, now seen corresponding path program 1 times [2021-02-23 18:48:03,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:48:03,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544023798] [2021-02-23 18:48:03,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:48:04,335 WARN L202 SmtUtils]: Spent 745.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-02-23 18:48:04,350 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:48:04,353 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:48:04,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:48:04,469 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:04,471 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:04,472 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:04,473 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:04,479 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:04,480 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:04,503 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-23 18:48:04,506 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-23 18:48:04,569 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:04,571 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:48:04,585 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:04,586 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:48:04,599 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:04,601 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:04,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:48:04,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:48:04,672 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:04,673 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:04,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:48:04,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544023798] [2021-02-23 18:48:04,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:48:04,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-23 18:48:04,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131244712] [2021-02-23 18:48:04,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 18:48:04,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:48:04,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 18:48:04,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-02-23 18:48:04,681 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 8 states. [2021-02-23 18:48:05,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:48:05,307 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2021-02-23 18:48:05,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-23 18:48:05,308 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2021-02-23 18:48:05,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:48:05,310 INFO L225 Difference]: With dead ends: 60 [2021-02-23 18:48:05,310 INFO L226 Difference]: Without dead ends: 42 [2021-02-23 18:48:05,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-02-23 18:48:05,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-02-23 18:48:05,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2021-02-23 18:48:05,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-02-23 18:48:05,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-02-23 18:48:05,325 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 28 [2021-02-23 18:48:05,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:48:05,326 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-02-23 18:48:05,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 18:48:05,326 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-02-23 18:48:05,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-23 18:48:05,328 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:48:05,328 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-23 18:48:05,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 18:48:05,328 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:48:05,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:48:05,329 INFO L82 PathProgramCache]: Analyzing trace with hash -161157810, now seen corresponding path program 2 times [2021-02-23 18:48:05,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:48:05,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784417734] [2021-02-23 18:48:05,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:48:05,939 WARN L202 SmtUtils]: Spent 600.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-02-23 18:48:06,561 WARN L202 SmtUtils]: Spent 613.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-02-23 18:48:06,564 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:48:06,570 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:48:06,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:48:06,688 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:06,689 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:06,690 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:06,691 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:06,696 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:06,697 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:06,703 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:06,704 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:48:06,718 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:06,720 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:48:06,737 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-23 18:48:06,740 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-23 18:48:06,773 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:06,774 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:48:06,788 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:06,789 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:48:06,804 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:06,805 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:06,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:48:06,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:48:06,871 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:06,872 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:06,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:48:06,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784417734] [2021-02-23 18:48:06,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:48:06,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-23 18:48:06,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063175672] [2021-02-23 18:48:06,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-23 18:48:06,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:48:06,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-23 18:48:06,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-23 18:48:06,889 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 10 states. [2021-02-23 18:48:07,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:48:07,772 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2021-02-23 18:48:07,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-23 18:48:07,773 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2021-02-23 18:48:07,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:48:07,774 INFO L225 Difference]: With dead ends: 74 [2021-02-23 18:48:07,774 INFO L226 Difference]: Without dead ends: 49 [2021-02-23 18:48:07,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-02-23 18:48:07,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-02-23 18:48:07,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2021-02-23 18:48:07,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-02-23 18:48:07,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2021-02-23 18:48:07,791 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 35 [2021-02-23 18:48:07,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:48:07,791 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2021-02-23 18:48:07,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-23 18:48:07,791 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2021-02-23 18:48:07,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-23 18:48:07,793 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:48:07,793 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:48:07,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 18:48:07,793 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:48:07,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:48:07,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1240105590, now seen corresponding path program 3 times [2021-02-23 18:48:07,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:48:07,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1290343826] [2021-02-23 18:48:07,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:48:08,467 WARN L202 SmtUtils]: Spent 665.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-02-23 18:48:09,176 WARN L202 SmtUtils]: Spent 698.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-02-23 18:48:09,179 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:48:09,180 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:48:09,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:48:09,260 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:09,261 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:09,262 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:09,263 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:09,268 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:09,269 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:09,275 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:09,277 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:48:09,293 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:09,295 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:48:09,315 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:09,317 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:48:09,338 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:09,340 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:48:09,369 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-23 18:48:09,370 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-23 18:48:09,421 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:09,422 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:48:09,442 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:09,443 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:48:09,468 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:09,470 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:09,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:48:09,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:48:09,552 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:09,553 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:09,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:48:09,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1290343826] [2021-02-23 18:48:09,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:48:09,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-02-23 18:48:09,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508029254] [2021-02-23 18:48:09,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-23 18:48:09,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:48:09,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-23 18:48:09,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-02-23 18:48:09,562 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 12 states. [2021-02-23 18:48:10,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:48:10,737 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2021-02-23 18:48:10,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-23 18:48:10,739 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2021-02-23 18:48:10,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:48:10,740 INFO L225 Difference]: With dead ends: 88 [2021-02-23 18:48:10,740 INFO L226 Difference]: Without dead ends: 56 [2021-02-23 18:48:10,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-02-23 18:48:10,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-02-23 18:48:10,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2021-02-23 18:48:10,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-02-23 18:48:10,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-02-23 18:48:10,758 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 42 [2021-02-23 18:48:10,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:48:10,759 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-02-23 18:48:10,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-23 18:48:10,759 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-02-23 18:48:10,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-02-23 18:48:10,760 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:48:10,761 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:48:10,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 18:48:10,761 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:48:10,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:48:10,762 INFO L82 PathProgramCache]: Analyzing trace with hash 823283790, now seen corresponding path program 4 times [2021-02-23 18:48:10,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:48:10,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846124836] [2021-02-23 18:48:10,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:48:11,434 WARN L202 SmtUtils]: Spent 664.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-02-23 18:48:12,086 WARN L202 SmtUtils]: Spent 643.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-02-23 18:48:12,088 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:48:12,090 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:48:12,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:48:12,187 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:12,188 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:12,189 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:12,190 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:12,197 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:12,197 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:12,205 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:12,206 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:48:12,220 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:12,221 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:48:12,236 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:12,238 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:48:12,255 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:12,256 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:48:12,276 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:12,277 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:48:12,297 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:12,298 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:48:12,322 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-23 18:48:12,323 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-23 18:48:12,375 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:12,376 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:48:12,402 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:12,403 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:48:12,439 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:12,440 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:12,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:48:12,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:48:12,546 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:12,549 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:12,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:48:12,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846124836] [2021-02-23 18:48:12,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:48:12,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-02-23 18:48:12,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312278986] [2021-02-23 18:48:12,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-23 18:48:12,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:48:12,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-23 18:48:12,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-02-23 18:48:12,565 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 14 states. [2021-02-23 18:48:14,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:48:14,168 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2021-02-23 18:48:14,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-23 18:48:14,170 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2021-02-23 18:48:14,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:48:14,175 INFO L225 Difference]: With dead ends: 70 [2021-02-23 18:48:14,175 INFO L226 Difference]: Without dead ends: 64 [2021-02-23 18:48:14,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-02-23 18:48:14,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-02-23 18:48:14,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2021-02-23 18:48:14,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-02-23 18:48:14,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2021-02-23 18:48:14,195 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 49 [2021-02-23 18:48:14,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:48:14,195 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2021-02-23 18:48:14,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-23 18:48:14,196 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2021-02-23 18:48:14,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-02-23 18:48:14,197 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:48:14,198 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:48:14,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 18:48:14,198 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:48:14,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:48:14,199 INFO L82 PathProgramCache]: Analyzing trace with hash 922206070, now seen corresponding path program 5 times [2021-02-23 18:48:14,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:48:14,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061715191] [2021-02-23 18:48:14,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:48:14,822 WARN L202 SmtUtils]: Spent 615.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-02-23 18:48:15,487 WARN L202 SmtUtils]: Spent 655.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-02-23 18:48:15,489 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:48:15,490 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:48:15,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:48:15,575 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:15,576 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:15,576 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:15,577 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:15,582 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:15,583 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:15,591 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:15,592 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:48:15,605 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:15,606 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:48:15,622 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:15,623 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:48:15,641 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:15,645 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:48:15,675 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:15,677 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:48:15,699 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:15,701 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:48:15,732 WARN L141 QuantifierPusher]: treesize reduction 13, result has 82.9 percent of original size [2021-02-23 18:48:15,738 WARN L147 QuantifierPusher]: treesize reduction 13, result has 82.9 percent of original size 63 [2021-02-23 18:48:15,810 WARN L141 QuantifierPusher]: treesize reduction 25, result has 66.2 percent of original size [2021-02-23 18:48:15,813 WARN L147 QuantifierPusher]: treesize reduction 25, result has 66.2 percent of original size 49 [2021-02-23 18:48:15,817 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:15,818 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:15,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:48:15,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:48:15,889 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:15,890 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:15,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:48:15,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1061715191] [2021-02-23 18:48:15,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:48:15,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-02-23 18:48:15,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892641906] [2021-02-23 18:48:15,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-23 18:48:15,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:48:15,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-23 18:48:15,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-02-23 18:48:15,900 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 12 states. [2021-02-23 18:48:17,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:48:17,079 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2021-02-23 18:48:17,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-23 18:48:17,080 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56 [2021-02-23 18:48:17,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:48:17,081 INFO L225 Difference]: With dead ends: 87 [2021-02-23 18:48:17,081 INFO L226 Difference]: Without dead ends: 0 [2021-02-23 18:48:17,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-02-23 18:48:17,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-23 18:48:17,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-23 18:48:17,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-23 18:48:17,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-23 18:48:17,083 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 56 [2021-02-23 18:48:17,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:48:17,084 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-23 18:48:17,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-23 18:48:17,084 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-23 18:48:17,084 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-23 18:48:17,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 18:48:17,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-23 18:48:17,911 WARN L202 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2021-02-23 18:48:18,252 WARN L202 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 25 [2021-02-23 18:48:18,364 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 10 [2021-02-23 18:48:18,547 WARN L202 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 16 [2021-02-23 18:48:18,719 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 15 [2021-02-23 18:48:18,998 WARN L202 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 16 [2021-02-23 18:48:19,001 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-23 18:48:19,001 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-23 18:48:19,002 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-23 18:48:19,002 INFO L192 CegarLoopUtils]: At program point L3-2(line 3) the Hoare annotation is: true [2021-02-23 18:48:19,002 INFO L192 CegarLoopUtils]: At program point L3-3(line 3) the Hoare annotation is: true [2021-02-23 18:48:19,002 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 18:48:19,002 INFO L192 CegarLoopUtils]: At program point L3-4(line 3) the Hoare annotation is: true [2021-02-23 18:48:19,002 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-23 18:48:19,003 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 3) the Hoare annotation is: true [2021-02-23 18:48:19,003 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|)) [2021-02-23 18:48:19,003 INFO L192 CegarLoopUtils]: At program point L3(line 3) the Hoare annotation is: true [2021-02-23 18:48:19,003 INFO L192 CegarLoopUtils]: At program point L3-1(line 3) the Hoare annotation is: true [2021-02-23 18:48:19,003 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-23 18:48:19,003 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-23 18:48:19,004 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 18:48:19,004 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-23 18:48:19,004 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-23 18:48:19,004 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 14 34) the Hoare annotation is: true [2021-02-23 18:48:19,004 INFO L185 CegarLoopUtils]: At program point L23(lines 23 24) the Hoare annotation is: (or (and (<= 4 main_~len~0) (<= main_~len~0 4)) (and (<= main_~len~0 3) (< 0 (+ (div main_~len~0 4294967296) 1)))) [2021-02-23 18:48:19,004 INFO L185 CegarLoopUtils]: At program point L23-2(lines 23 24) the Hoare annotation is: (or (= main_~len~0 0) (and (<= main_~len~0 1) (<= 1 main_~len~0)) (and (<= main_~len~0 2) (<= 2 main_~len~0)) (and (<= main_~len~0 3) (<= 3 main_~len~0))) [2021-02-23 18:48:19,005 INFO L185 CegarLoopUtils]: At program point L21-1(line 21) the Hoare annotation is: (and (< 0 (+ (div main_~len~0 4294967296) 1)) (<= main_~len~0 4)) [2021-02-23 18:48:19,005 INFO L185 CegarLoopUtils]: At program point L21-3(line 21) the Hoare annotation is: (or (and (<= 4 main_~len~0) (<= main_~len~0 4)) (and (<= main_~len~0 3) (< 0 (+ (div main_~len~0 4294967296) 1)))) [2021-02-23 18:48:19,005 INFO L185 CegarLoopUtils]: At program point L21-4(lines 21 29) the Hoare annotation is: (and (< 0 (+ (div main_~len~0 4294967296) 1)) (<= main_~len~0 4)) [2021-02-23 18:48:19,005 INFO L185 CegarLoopUtils]: At program point L21-5(lines 21 29) the Hoare annotation is: (and (< 0 (+ (div main_~len~0 4294967296) 1)) (<= main_~len~0 4)) [2021-02-23 18:48:19,005 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 14 34) the Hoare annotation is: true [2021-02-23 18:48:19,005 INFO L192 CegarLoopUtils]: At program point L30(line 30) the Hoare annotation is: true [2021-02-23 18:48:19,006 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 14 34) the Hoare annotation is: true [2021-02-23 18:48:19,006 INFO L185 CegarLoopUtils]: At program point L28(line 28) the Hoare annotation is: (or (= main_~len~0 0) (and (<= main_~len~0 1) (<= 1 main_~len~0)) (and (<= main_~len~0 2) (<= 2 main_~len~0)) (and (<= main_~len~0 3) (<= 3 main_~len~0))) [2021-02-23 18:48:19,006 INFO L185 CegarLoopUtils]: At program point L28-1(line 28) the Hoare annotation is: (or (and (<= main_~len~0 2) (<= 2 |main_#t~post8|) (<= 2 main_~len~0) (<= |main_#t~post8| 2)) (and (= |main_#t~post8| 0) (= main_~len~0 0)) (and (<= |main_#t~post8| 3) (<= main_~len~0 3) (<= 3 main_~len~0) (<= 3 |main_#t~post8|)) (and (<= |main_#t~post8| 1) (<= 1 |main_#t~post8|) (<= main_~len~0 1) (<= 1 main_~len~0))) [2021-02-23 18:48:19,006 INFO L185 CegarLoopUtils]: At program point L28-2(line 28) the Hoare annotation is: (or (and (<= |main_#t~post8| 3) (<= 4 main_~len~0) (<= main_~len~0 4) (<= 3 |main_#t~post8|)) (and (<= main_~len~0 2) (<= 2 main_~len~0) (<= |main_#t~post8| 1) (<= 1 |main_#t~post8|)) (and (<= 2 |main_#t~post8|) (<= main_~len~0 3) (<= |main_#t~post8| 2) (<= 3 main_~len~0)) (and (= |main_#t~post8| 0) (<= main_~len~0 1) (<= 1 main_~len~0))) [2021-02-23 18:48:19,006 INFO L185 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: (and (<= 4 main_~len~0) (<= main_~len~0 4)) [2021-02-23 18:48:19,007 INFO L185 CegarLoopUtils]: At program point L18(line 18) the Hoare annotation is: (= main_~len~0 0) [2021-02-23 18:48:19,007 INFO L192 CegarLoopUtils]: At program point L16(line 16) the Hoare annotation is: true [2021-02-23 18:48:19,007 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2021-02-23 18:48:19,007 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 5 10) the Hoare annotation is: true [2021-02-23 18:48:19,007 INFO L185 CegarLoopUtils]: At program point L7(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-23 18:48:19,007 INFO L185 CegarLoopUtils]: At program point L6(lines 6 8) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-02-23 18:48:19,008 INFO L185 CegarLoopUtils]: At program point L7-1(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-23 18:48:19,008 INFO L192 CegarLoopUtils]: At program point L6-2(lines 5 10) the Hoare annotation is: true [2021-02-23 18:48:19,008 INFO L185 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-23 18:48:19,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 06:48:19 BoogieIcfgContainer [2021-02-23 18:48:19,026 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 18:48:19,028 INFO L168 Benchmark]: Toolchain (without parser) took 18030.35 ms. Allocated memory was 160.4 MB in the beginning and 198.2 MB in the end (delta: 37.7 MB). Free memory was 137.6 MB in the beginning and 92.8 MB in the end (delta: 44.9 MB). Peak memory consumption was 107.8 MB. Max. memory is 8.0 GB. [2021-02-23 18:48:19,028 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 160.4 MB. Free memory is still 136.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 18:48:19,029 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.96 ms. Allocated memory is still 160.4 MB. Free memory was 136.7 MB in the beginning and 127.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 18:48:19,029 INFO L168 Benchmark]: Boogie Preprocessor took 42.75 ms. Allocated memory is still 160.4 MB. Free memory was 127.4 MB in the beginning and 126.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 18:48:19,029 INFO L168 Benchmark]: RCFGBuilder took 615.15 ms. Allocated memory is still 160.4 MB. Free memory was 126.0 MB in the beginning and 112.1 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-02-23 18:48:19,030 INFO L168 Benchmark]: TraceAbstraction took 17027.81 ms. Allocated memory was 160.4 MB in the beginning and 198.2 MB in the end (delta: 37.7 MB). Free memory was 144.5 MB in the beginning and 92.8 MB in the end (delta: 51.7 MB). Peak memory consumption was 113.6 MB. Max. memory is 8.0 GB. [2021-02-23 18:48:19,032 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 160.4 MB. Free memory is still 136.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 296.96 ms. Allocated memory is still 160.4 MB. Free memory was 136.7 MB in the beginning and 127.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.75 ms. Allocated memory is still 160.4 MB. Free memory was 127.4 MB in the beginning and 126.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 615.15 ms. Allocated memory is still 160.4 MB. Free memory was 126.0 MB in the beginning and 112.1 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 17027.81 ms. Allocated memory was 160.4 MB in the beginning and 198.2 MB in the end (delta: 37.7 MB). Free memory was 144.5 MB in the beginning and 92.8 MB in the end (delta: 51.7 MB). Peak memory consumption was 113.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: 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: 21]: Loop Invariant Derived loop invariant: 0 < len / 4294967296 + 1 && len <= 4 - ProcedureContractResult [Line: 14]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 5]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 14.9s, OverallIterations: 7, TraceHistogramMax: 5, AutomataDifference: 6.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 209 SDtfs, 335 SDslu, 567 SDs, 0 SdLazy, 1248 SolverSat, 69 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 131 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 5.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=58occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 18 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 37 LocationsWithAnnotation, 107 PreInvPairs, 174 NumberOfFragments, 297 HoareAnnotationTreeSize, 107 FomulaSimplifications, 5598 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 37 FomulaSimplificationsInter, 1808 FormulaSimplificationTreeSizeReductionInter, 1.6s 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...