/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/sum01-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 21:17:38,973 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 21:17:38,976 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 21:17:39,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 21:17:39,012 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 21:17:39,013 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 21:17:39,015 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 21:17:39,018 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 21:17:39,020 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 21:17:39,021 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 21:17:39,022 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 21:17:39,024 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 21:17:39,025 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 21:17:39,026 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 21:17:39,028 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 21:17:39,030 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 21:17:39,048 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 21:17:39,049 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 21:17:39,051 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 21:17:39,057 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 21:17:39,060 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 21:17:39,066 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 21:17:39,068 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 21:17:39,070 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 21:17:39,077 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 21:17:39,096 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 21:17:39,097 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 21:17:39,098 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 21:17:39,103 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 21:17:39,124 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 21:17:39,124 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 21:17:39,129 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 21:17:39,130 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 21:17:39,130 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 21:17:39,130 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 21:17:39,130 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 21:17:39,131 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 21:17:39,131 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 21:17:39,131 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 21:17:39,132 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 21:17:39,132 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 21:17:39,133 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 21:17:39,133 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 21:17:39,133 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 21:17:39,133 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 21:17:39,134 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 21:17:39,134 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 21:17:39,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 21:17:39,134 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 21:17:39,135 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 21:17:39,135 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 21:17:39,135 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 21:17:39,511 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 21:17:39,557 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 21:17:39,560 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 21:17:39,563 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 21:17:39,564 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 21:17:39,565 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-2.i [2021-02-21 21:17:39,657 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf1481719/c73a9a4f48fc4ae9b6804e7a2e29cb31/FLAGe1a264b3f [2021-02-21 21:17:40,301 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 21:17:40,302 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01-2.i [2021-02-21 21:17:40,310 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf1481719/c73a9a4f48fc4ae9b6804e7a2e29cb31/FLAGe1a264b3f [2021-02-21 21:17:40,651 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf1481719/c73a9a4f48fc4ae9b6804e7a2e29cb31 [2021-02-21 21:17:40,654 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 21:17:40,668 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 21:17:40,670 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 21:17:40,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 21:17:40,674 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 21:17:40,675 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:17:40" (1/1) ... [2021-02-21 21:17:40,677 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@201e2a5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:40, skipping insertion in model container [2021-02-21 21:17:40,677 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:17:40" (1/1) ... [2021-02-21 21:17:40,686 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 21:17:40,703 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 21:17:40,895 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/sum01-2.i[849,862] [2021-02-21 21:17:40,907 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:17:40,916 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 21:17:40,928 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/sum01-2.i[849,862] [2021-02-21 21:17:40,932 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:17:40,949 INFO L208 MainTranslator]: Completed translation [2021-02-21 21:17:40,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:40 WrapperNode [2021-02-21 21:17:40,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 21:17:40,951 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 21:17:40,951 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 21:17:40,951 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 21:17:40,965 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:40" (1/1) ... [2021-02-21 21:17:40,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:40" (1/1) ... [2021-02-21 21:17:40,974 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:40" (1/1) ... [2021-02-21 21:17:40,974 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:40" (1/1) ... [2021-02-21 21:17:40,980 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:40" (1/1) ... [2021-02-21 21:17:40,985 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:40" (1/1) ... [2021-02-21 21:17:40,986 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:40" (1/1) ... [2021-02-21 21:17:40,989 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 21:17:40,990 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 21:17:40,990 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 21:17:40,990 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 21:17:40,991 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:40" (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 [2021-02-21 21:17:41,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 21:17:41,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 21:17:41,121 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 21:17:41,121 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-21 21:17:41,121 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 21:17:41,121 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 21:17:41,121 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 21:17:41,122 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-21 21:17:41,122 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-21 21:17:41,122 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 21:17:41,123 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 21:17:41,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-21 21:17:41,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 21:17:41,124 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 21:17:41,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 21:17:41,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 21:17:41,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 21:17:41,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 21:17:41,127 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 21:17:41,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 21:17:41,568 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 21:17:41,569 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-21 21:17:41,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:17:41 BoogieIcfgContainer [2021-02-21 21:17:41,571 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 21:17:41,574 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 21:17:41,574 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 21:17:41,582 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 21:17:41,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 09:17:40" (1/3) ... [2021-02-21 21:17:41,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e7bbf2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:17:41, skipping insertion in model container [2021-02-21 21:17:41,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:40" (2/3) ... [2021-02-21 21:17:41,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e7bbf2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:17:41, skipping insertion in model container [2021-02-21 21:17:41,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:17:41" (3/3) ... [2021-02-21 21:17:41,591 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01-2.i [2021-02-21 21:17:41,604 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 21:17:41,609 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 21:17:41,629 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 21:17:41,667 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 21:17:41,667 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 21:17:41,667 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 21:17:41,668 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 21:17:41,668 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 21:17:41,668 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 21:17:41,668 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 21:17:41,668 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 21:17:41,691 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2021-02-21 21:17:41,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-21 21:17:41,702 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:17:41,703 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] [2021-02-21 21:17:41,703 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:17:41,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:17:41,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1347732111, now seen corresponding path program 1 times [2021-02-21 21:17:41,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:17:41,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804680954] [2021-02-21 21:17:41,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:17:41,818 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:17:41,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:41,972 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:41,974 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:41,975 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:41,976 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:42,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:17:42,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:42,042 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:42,043 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:42,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:17:42,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804680954] [2021-02-21 21:17:42,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:17:42,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-21 21:17:42,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540502846] [2021-02-21 21:17:42,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-21 21:17:42,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:17:42,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-21 21:17:42,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-21 21:17:42,083 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2021-02-21 21:17:42,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:17:42,200 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2021-02-21 21:17:42,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-21 21:17:42,202 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2021-02-21 21:17:42,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:17:42,211 INFO L225 Difference]: With dead ends: 47 [2021-02-21 21:17:42,211 INFO L226 Difference]: Without dead ends: 28 [2021-02-21 21:17:42,215 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 [2021-02-21 21:17:42,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-02-21 21:17:42,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-02-21 21:17:42,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-02-21 21:17:42,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-02-21 21:17:42,267 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 23 [2021-02-21 21:17:42,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:17:42,268 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-02-21 21:17:42,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-21 21:17:42,268 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-02-21 21:17:42,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-21 21:17:42,269 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:17:42,269 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] [2021-02-21 21:17:42,270 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 21:17:42,270 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:17:42,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:17:42,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1339420422, now seen corresponding path program 1 times [2021-02-21 21:17:42,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:17:42,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574929857] [2021-02-21 21:17:42,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:17:42,275 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:17:42,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:42,423 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:42,424 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:42,434 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:42,436 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:17:42,445 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:42,446 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:17:42,453 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:42,454 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:17:42,463 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:42,464 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:42,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:17:42,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:42,513 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:42,514 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:42,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:17:42,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574929857] [2021-02-21 21:17:42,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:17:42,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 21:17:42,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368696073] [2021-02-21 21:17:42,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 21:17:42,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:17:42,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 21:17:42,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-21 21:17:42,521 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 6 states. [2021-02-21 21:17:42,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:17:42,807 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2021-02-21 21:17:42,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-21 21:17:42,808 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2021-02-21 21:17:42,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:17:42,809 INFO L225 Difference]: With dead ends: 35 [2021-02-21 21:17:42,809 INFO L226 Difference]: Without dead ends: 30 [2021-02-21 21:17:42,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-21 21:17:42,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-02-21 21:17:42,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-02-21 21:17:42,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-02-21 21:17:42,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-02-21 21:17:42,824 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 23 [2021-02-21 21:17:42,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:17:42,824 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-02-21 21:17:42,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 21:17:42,825 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-02-21 21:17:42,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-21 21:17:42,826 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:17:42,826 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] [2021-02-21 21:17:42,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 21:17:42,826 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:17:42,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:17:42,827 INFO L82 PathProgramCache]: Analyzing trace with hash -924971526, now seen corresponding path program 1 times [2021-02-21 21:17:42,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:17:42,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448510494] [2021-02-21 21:17:42,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:17:44,972 WARN L141 QuantifierPusher]: treesize reduction 58, result has 59.7 percent of original size [2021-02-21 21:17:45,007 WARN L147 QuantifierPusher]: treesize reduction 58, result has 59.7 percent of original size 86 [2021-02-21 21:17:45,008 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-21 21:17:45,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:45,091 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:45,092 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:45,093 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:45,094 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:45,098 WARN L141 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size [2021-02-21 21:17:45,099 WARN L147 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size 7 [2021-02-21 21:17:45,111 WARN L141 QuantifierPusher]: treesize reduction 48, result has 34.2 percent of original size [2021-02-21 21:17:45,112 WARN L147 QuantifierPusher]: treesize reduction 48, result has 34.2 percent of original size 25 [2021-02-21 21:17:45,133 WARN L141 QuantifierPusher]: treesize reduction 41, result has 29.3 percent of original size [2021-02-21 21:17:45,135 WARN L147 QuantifierPusher]: treesize reduction 41, result has 29.3 percent of original size 17 [2021-02-21 21:17:45,151 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:45,152 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:17:45,159 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:45,160 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:17:45,171 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:45,172 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:45,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:17:45,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:45,236 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:45,236 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:45,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:17:45,246 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:45,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:17:45,252 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:45,253 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:17:45,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:17:45,259 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:45,260 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-21 21:17:45,264 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 137 [2021-02-21 21:17:45,379 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-02-21 21:17:45,473 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:45,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:17:45,478 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:45,480 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-21 21:17:45,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:17:45,486 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:45,490 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:17:45,495 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 87 [2021-02-21 21:17:45,636 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:45,642 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-02-21 21:17:45,716 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:45,718 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-02-21 21:17:45,799 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:45,804 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-02-21 21:17:45,912 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:45,915 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-02-21 21:17:45,999 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:46,000 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:46,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448510494] [2021-02-21 21:17:46,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:17:46,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-02-21 21:17:46,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655701759] [2021-02-21 21:17:46,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-21 21:17:46,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:17:46,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-21 21:17:46,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-02-21 21:17:46,004 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 13 states. [2021-02-21 21:17:46,847 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2021-02-21 21:17:47,020 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 48 [2021-02-21 21:17:47,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:17:47,110 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-02-21 21:17:47,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-21 21:17:47,111 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2021-02-21 21:17:47,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:17:47,112 INFO L225 Difference]: With dead ends: 30 [2021-02-21 21:17:47,113 INFO L226 Difference]: Without dead ends: 0 [2021-02-21 21:17:47,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-02-21 21:17:47,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-21 21:17:47,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-21 21:17:47,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-21 21:17:47,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-21 21:17:47,118 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2021-02-21 21:17:47,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:17:47,118 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-21 21:17:47,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-02-21 21:17:47,119 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-21 21:17:47,119 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-21 21:17:47,119 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 21:17:47,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-21 21:17:47,855 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2021-02-21 21:17:47,856 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2021-02-21 21:17:47,856 INFO L189 CegarLoopUtils]: For program point L12-1(line 12) no Hoare annotation was computed. [2021-02-21 21:17:47,856 INFO L189 CegarLoopUtils]: For program point L12-2(line 12) no Hoare annotation was computed. [2021-02-21 21:17:47,856 INFO L189 CegarLoopUtils]: For program point L12-3(line 12) no Hoare annotation was computed. [2021-02-21 21:17:47,856 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-21 21:17:47,857 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-21 21:17:47,858 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 12) the Hoare annotation is: true [2021-02-21 21:17:47,858 INFO L192 CegarLoopUtils]: At program point L12(line 12) the Hoare annotation is: true [2021-02-21 21:17:47,858 INFO L192 CegarLoopUtils]: At program point L12-1(line 12) the Hoare annotation is: true [2021-02-21 21:17:47,858 INFO L192 CegarLoopUtils]: At program point L12-2(line 12) the Hoare annotation is: true [2021-02-21 21:17:47,858 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2021-02-21 21:17:47,858 INFO L192 CegarLoopUtils]: At program point L12-3(line 12) the Hoare annotation is: true [2021-02-21 21:17:47,859 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-21 21:17:47,859 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-21 21:17:47,859 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-21 21:17:47,859 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-21 21:17:47,859 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-21 21:17:47,859 INFO L185 CegarLoopUtils]: At program point L25(line 25) the Hoare annotation is: (= main_~sn~0 0) [2021-02-21 21:17:47,860 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 22 29) the Hoare annotation is: true [2021-02-21 21:17:47,860 INFO L192 CegarLoopUtils]: At program point L23(line 23) the Hoare annotation is: true [2021-02-21 21:17:47,861 INFO L192 CegarLoopUtils]: At program point L23-1(line 23) the Hoare annotation is: true [2021-02-21 21:17:47,861 INFO L185 CegarLoopUtils]: At program point L25-3(lines 25 27) the Hoare annotation is: (and (or (and (<= 2 main_~i~0) (<= main_~sn~0 4) (<= main_~i~0 2) (<= 4 main_~sn~0)) (and (= main_~i~0 1) (= 2 main_~sn~0)) (and (<= (+ (div (+ (* main_~sn~0 (- 1)) 6) (- 2)) 3) main_~i~0) (<= 3 main_~i~0) (<= main_~i~0 (+ (div (+ main_~sn~0 (- 6)) 2) 3)))) (<= main_~i~0 main_~n~0)) [2021-02-21 21:17:47,861 INFO L192 CegarLoopUtils]: At program point L23-2(line 23) the Hoare annotation is: true [2021-02-21 21:17:47,861 INFO L185 CegarLoopUtils]: At program point L25-4(line 25) the Hoare annotation is: (and (or (and (<= 2 main_~i~0) (<= main_~sn~0 4) (<= main_~i~0 2) (<= 4 main_~sn~0)) (and (= main_~i~0 1) (= 2 main_~sn~0)) (and (<= (+ (div (+ (* main_~sn~0 (- 1)) 6) (- 2)) 3) main_~i~0) (<= 3 main_~i~0) (<= main_~i~0 (+ (div (+ main_~sn~0 (- 6)) 2) 3)))) (= |main_#t~post4| main_~i~0) (<= main_~i~0 main_~n~0)) [2021-02-21 21:17:47,861 INFO L192 CegarLoopUtils]: At program point L23-3(line 23) the Hoare annotation is: true [2021-02-21 21:17:47,862 INFO L185 CegarLoopUtils]: At program point L25-5(line 25) the Hoare annotation is: (and (or (and (= 2 main_~sn~0) (= |main_#t~post4| 1)) (and (<= |main_#t~post4| (+ (div (+ main_~sn~0 (- 6)) 2) 3)) (<= 3 |main_#t~post4|) (<= (+ (div (+ (* main_~sn~0 (- 1)) 6) (- 2)) 3) |main_#t~post4|)) (and (<= main_~sn~0 4) (<= |main_#t~post4| 2) (<= 4 main_~sn~0) (<= 2 |main_#t~post4|))) (= main_~i~0 (+ |main_#t~post4| 1)) (<= |main_#t~post4| main_~n~0)) [2021-02-21 21:17:47,862 INFO L185 CegarLoopUtils]: At program point L25-6(lines 25 27) the Hoare annotation is: (or (and (or (and (<= (+ (div (+ (* main_~sn~0 (- 1)) 6) (- 2)) 4) main_~i~0) (<= 4 main_~i~0) (<= main_~i~0 (+ (div (+ main_~sn~0 (- 6)) 2) 4))) (and (<= main_~sn~0 4) (<= 3 main_~i~0) (<= main_~i~0 3) (<= 4 main_~sn~0)) (and (= main_~i~0 2) (= 2 main_~sn~0))) (<= main_~i~0 (+ main_~n~0 1))) (and (= main_~sn~0 0) (= main_~i~0 1))) [2021-02-21 21:17:47,862 INFO L185 CegarLoopUtils]: At program point L25-7(lines 25 27) the Hoare annotation is: (or (= main_~sn~0 0) (= main_~sn~0 (* main_~n~0 2))) [2021-02-21 21:17:47,862 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 22 29) the Hoare annotation is: true [2021-02-21 21:17:47,862 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 22 29) the Hoare annotation is: true [2021-02-21 21:17:47,863 INFO L185 CegarLoopUtils]: At program point L26(line 26) the Hoare annotation is: (let ((.cse0 (<= main_~i~0 main_~n~0))) (or (and (= main_~sn~0 0) .cse0 (= main_~i~0 1)) (and (or (= 2 main_~sn~0) (<= 4 main_~sn~0)) (<= (+ (div (+ (* main_~sn~0 (- 1)) 4) (- 2)) 3) main_~i~0) .cse0 (<= main_~i~0 (+ (div (+ main_~sn~0 (- 4)) 2) 3))))) [2021-02-21 21:17:47,863 INFO L185 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: (= main_~sn~0 0) [2021-02-21 21:17:47,863 INFO L192 CegarLoopUtils]: At program point L24-1(line 24) the Hoare annotation is: true [2021-02-21 21:17:47,864 INFO L185 CegarLoopUtils]: At program point L17(line 17) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-21 21:17:47,867 INFO L185 CegarLoopUtils]: At program point L16(lines 16 18) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-02-21 21:17:47,869 INFO L185 CegarLoopUtils]: At program point L17-1(line 17) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-21 21:17:47,869 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 15 20) the Hoare annotation is: true [2021-02-21 21:17:47,870 INFO L192 CegarLoopUtils]: At program point L16-2(lines 15 20) the Hoare annotation is: true [2021-02-21 21:17:47,871 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 15 20) the Hoare annotation is: true [2021-02-21 21:17:47,871 INFO L185 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-21 21:17:47,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 09:17:47 BoogieIcfgContainer [2021-02-21 21:17:47,908 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 21:17:47,910 INFO L168 Benchmark]: Toolchain (without parser) took 7253.83 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 128.1 MB in the beginning and 73.4 MB in the end (delta: 54.7 MB). Peak memory consumption was 97.5 MB. Max. memory is 8.0 GB. [2021-02-21 21:17:47,911 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 151.0 MB. Free memory is still 124.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 21:17:47,911 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.02 ms. Allocated memory is still 151.0 MB. Free memory was 126.9 MB in the beginning and 117.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-21 21:17:47,912 INFO L168 Benchmark]: Boogie Preprocessor took 38.24 ms. Allocated memory is still 151.0 MB. Free memory was 117.4 MB in the beginning and 115.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-21 21:17:47,913 INFO L168 Benchmark]: RCFGBuilder took 583.03 ms. Allocated memory is still 151.0 MB. Free memory was 115.8 MB in the beginning and 101.4 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-02-21 21:17:47,914 INFO L168 Benchmark]: TraceAbstraction took 6334.13 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 101.2 MB in the beginning and 73.4 MB in the end (delta: 27.7 MB). Peak memory consumption was 70.2 MB. Max. memory is 8.0 GB. [2021-02-21 21:17:47,917 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 151.0 MB. Free memory is still 124.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 280.02 ms. Allocated memory is still 151.0 MB. Free memory was 126.9 MB in the beginning and 117.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.24 ms. Allocated memory is still 151.0 MB. Free memory was 117.4 MB in the beginning and 115.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 583.03 ms. Allocated memory is still 151.0 MB. Free memory was 115.8 MB in the beginning and 101.4 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6334.13 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 101.2 MB in the beginning and 73.4 MB in the end (delta: 27.7 MB). Peak memory consumption was 70.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: 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: 25]: Loop Invariant Derived loop invariant: ((((((sn * -1 + 6) / -2 + 4 <= i && 4 <= i) && i <= (sn + -6) / 2 + 4) || (((sn <= 4 && 3 <= i) && i <= 3) && 4 <= sn)) || (i == 2 && 2 == sn)) && i <= n + 1) || (sn == 0 && i == 1) - ProcedureContractResult [Line: 22]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 15]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.4s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 78 SDtfs, 66 SDslu, 116 SDs, 0 SdLazy, 168 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred 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, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 36 LocationsWithAnnotation, 50 PreInvPairs, 62 NumberOfFragments, 336 HoareAnnotationTreeSize, 50 FomulaSimplifications, 153 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 36 FomulaSimplificationsInter, 624 FormulaSimplificationTreeSizeReductionInter, 0.5s 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...