/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/loop-invariants/even.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 02:24:56,445 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 02:24:56,449 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 02:24:56,523 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 02:24:56,571 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 02:24:56,575 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 02:24:56,579 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 02:24:56,583 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 02:24:56,588 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 02:24:56,591 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 02:24:56,598 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 02:24:56,623 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 02:24:56,628 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 02:24:56,630 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 02:24:56,633 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 02:24:56,636 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 02:24:56,660 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 02:24:56,683 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 02:24:56,684 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 02:24:56,685 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 02:24:56,687 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-22 02:24:56,703 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 02:24:56,704 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 02:24:56,706 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 02:24:56,707 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 02:24:56,707 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 02:24:56,707 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 02:24:56,707 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 02:24:56,708 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 02:24:56,708 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 02:24:56,708 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 02:24:56,708 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 02:24:56,709 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 02:24:56,709 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 02:24:56,709 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 02:24:56,709 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 02:24:56,710 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 02:24:56,710 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 02:24:56,710 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 02:24:56,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:24:56,711 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 02:24:56,711 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 02:24:56,711 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 02:24:56,711 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 02:24:56,712 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 02:24:57,317 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 02:24:57,369 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 02:24:57,375 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 02:24:57,378 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 02:24:57,379 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 02:24:57,381 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/even.c [2021-02-22 02:24:57,500 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d3e942cb/9433ebd11f7f4f21a4b26d56446a2c7f/FLAG7746d4675 [2021-02-22 02:24:58,445 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 02:24:58,446 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/even.c [2021-02-22 02:24:58,469 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d3e942cb/9433ebd11f7f4f21a4b26d56446a2c7f/FLAG7746d4675 [2021-02-22 02:24:58,728 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d3e942cb/9433ebd11f7f4f21a4b26d56446a2c7f [2021-02-22 02:24:58,732 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 02:24:58,745 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 02:24:58,747 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 02:24:58,747 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 02:24:58,753 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 02:24:58,754 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:24:58" (1/1) ... [2021-02-22 02:24:58,757 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63442433 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:58, skipping insertion in model container [2021-02-22 02:24:58,757 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:24:58" (1/1) ... [2021-02-22 02:24:58,768 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 02:24:58,787 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 02:24:58,962 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/even.c[351,364] [2021-02-22 02:24:58,977 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:24:58,992 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 02:24:59,012 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/even.c[351,364] [2021-02-22 02:24:59,016 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:24:59,040 INFO L208 MainTranslator]: Completed translation [2021-02-22 02:24:59,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:59 WrapperNode [2021-02-22 02:24:59,041 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 02:24:59,043 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 02:24:59,044 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 02:24:59,044 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 02:24:59,066 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:59" (1/1) ... [2021-02-22 02:24:59,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:59" (1/1) ... [2021-02-22 02:24:59,079 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:59" (1/1) ... [2021-02-22 02:24:59,080 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:59" (1/1) ... [2021-02-22 02:24:59,090 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:59" (1/1) ... [2021-02-22 02:24:59,097 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:59" (1/1) ... [2021-02-22 02:24:59,099 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:59" (1/1) ... [2021-02-22 02:24:59,102 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 02:24:59,104 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 02:24:59,105 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 02:24:59,105 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 02:24:59,106 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:24:59,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 02:24:59,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 02:24:59,312 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 02:24:59,312 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-22 02:24:59,312 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 02:24:59,312 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 02:24:59,312 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 02:24:59,313 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 02:24:59,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 02:24:59,316 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-22 02:24:59,316 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-22 02:24:59,316 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 02:24:59,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 02:24:59,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 02:24:59,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 02:24:59,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 02:24:59,318 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 02:24:59,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 02:25:00,011 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 02:25:00,011 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-22 02:25:00,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:25:00 BoogieIcfgContainer [2021-02-22 02:25:00,015 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 02:25:00,020 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 02:25:00,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 02:25:00,028 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 02:25:00,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:24:58" (1/3) ... [2021-02-22 02:25:00,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d417323 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:25:00, skipping insertion in model container [2021-02-22 02:25:00,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:59" (2/3) ... [2021-02-22 02:25:00,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d417323 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:25:00, skipping insertion in model container [2021-02-22 02:25:00,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:25:00" (3/3) ... [2021-02-22 02:25:00,035 INFO L111 eAbstractionObserver]: Analyzing ICFG even.c [2021-02-22 02:25:00,045 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 02:25:00,052 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 02:25:00,082 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 02:25:00,128 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 02:25:00,129 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 02:25:00,129 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 02:25:00,131 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 02:25:00,132 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 02:25:00,132 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 02:25:00,132 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 02:25:00,132 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 02:25:00,165 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2021-02-22 02:25:00,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-22 02:25:00,185 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:25:00,187 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] [2021-02-22 02:25:00,188 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:25:00,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:25:00,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1714919044, now seen corresponding path program 1 times [2021-02-22 02:25:00,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:25:00,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [477624627] [2021-02-22 02:25:00,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:25:00,344 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:25:00,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:00,551 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:00,553 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:00,555 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:00,559 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:00,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:25:00,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:00,682 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:00,685 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:00,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:25:00,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [477624627] [2021-02-22 02:25:00,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:25:00,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-22 02:25:00,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225286850] [2021-02-22 02:25:00,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-22 02:25:00,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:25:00,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-22 02:25:00,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 02:25:00,752 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2021-02-22 02:25:00,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:25:00,954 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2021-02-22 02:25:00,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-22 02:25:00,958 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2021-02-22 02:25:00,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:25:00,968 INFO L225 Difference]: With dead ends: 50 [2021-02-22 02:25:00,969 INFO L226 Difference]: Without dead ends: 30 [2021-02-22 02:25:00,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 02:25:00,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-02-22 02:25:01,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-02-22 02:25:01,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-02-22 02:25:01,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2021-02-22 02:25:01,060 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 25 [2021-02-22 02:25:01,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:25:01,061 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2021-02-22 02:25:01,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-22 02:25:01,062 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2021-02-22 02:25:01,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-22 02:25:01,063 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:25:01,063 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:25:01,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 02:25:01,064 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:25:01,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:25:01,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1521130299, now seen corresponding path program 1 times [2021-02-22 02:25:01,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:25:01,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835413026] [2021-02-22 02:25:01,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:25:01,070 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:25:01,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:01,203 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:01,204 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:01,209 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:01,211 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:25:01,221 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:01,225 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:25:01,234 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:01,235 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:25:01,248 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:01,251 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:01,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:25:01,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:01,388 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:01,392 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:01,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:25:01,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835413026] [2021-02-22 02:25:01,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:25:01,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-22 02:25:01,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204524701] [2021-02-22 02:25:01,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-22 02:25:01,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:25:01,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-22 02:25:01,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-22 02:25:01,400 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 6 states. [2021-02-22 02:25:01,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:25:01,770 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-02-22 02:25:01,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-22 02:25:01,771 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2021-02-22 02:25:01,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:25:01,773 INFO L225 Difference]: With dead ends: 40 [2021-02-22 02:25:01,773 INFO L226 Difference]: Without dead ends: 34 [2021-02-22 02:25:01,780 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 [2021-02-22 02:25:01,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-02-22 02:25:01,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-02-22 02:25:01,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-02-22 02:25:01,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2021-02-22 02:25:01,815 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 27 [2021-02-22 02:25:01,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:25:01,818 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2021-02-22 02:25:01,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-22 02:25:01,818 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2021-02-22 02:25:01,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-22 02:25:01,819 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:25:01,819 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:25:01,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 02:25:01,822 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:25:01,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:25:01,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1827953076, now seen corresponding path program 1 times [2021-02-22 02:25:01,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:25:01,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608522910] [2021-02-22 02:25:01,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:25:01,870 WARN L141 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size [2021-02-22 02:25:01,892 WARN L147 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size 15 [2021-02-22 02:25:01,903 WARN L141 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size [2021-02-22 02:25:01,906 WARN L147 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size 15 [2021-02-22 02:25:01,920 WARN L141 QuantifierPusher]: treesize reduction 9, result has 47.1 percent of original size [2021-02-22 02:25:01,941 WARN L147 QuantifierPusher]: treesize reduction 9, result has 47.1 percent of original size 8 [2021-02-22 02:25:01,946 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:01,953 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-22 02:25:01,957 WARN L141 QuantifierPusher]: treesize reduction 5, result has 72.2 percent of original size [2021-02-22 02:25:01,961 WARN L147 QuantifierPusher]: treesize reduction 5, result has 72.2 percent of original size 13 [2021-02-22 02:25:01,967 WARN L141 QuantifierPusher]: treesize reduction 5, result has 72.2 percent of original size [2021-02-22 02:25:01,970 WARN L147 QuantifierPusher]: treesize reduction 5, result has 72.2 percent of original size 13 [2021-02-22 02:25:01,978 WARN L141 QuantifierPusher]: treesize reduction 2, result has 88.2 percent of original size [2021-02-22 02:25:01,983 WARN L147 QuantifierPusher]: treesize reduction 2, result has 88.2 percent of original size 15 [2021-02-22 02:25:01,987 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:01,993 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-02-22 02:25:01,994 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-22 02:25:02,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:02,210 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:02,211 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:02,213 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:02,214 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:25:02,221 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:02,223 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:25:02,239 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.1 percent of original size [2021-02-22 02:25:02,245 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.1 percent of original size 34 [2021-02-22 02:25:02,313 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.8 percent of original size [2021-02-22 02:25:02,317 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.8 percent of original size 30 [2021-02-22 02:25:02,366 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:02,367 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:25:02,379 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:02,380 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:25:02,393 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:02,397 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:02,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:25:02,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:02,521 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:02,522 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:02,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:25:02,538 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:02,548 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-02-22 02:25:02,558 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:02,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:25:02,565 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:02,574 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 61 [2021-02-22 02:25:02,584 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-02-22 02:25:02,614 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:02,617 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-22 02:25:02,649 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:02,652 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 02:25:02,681 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:02,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:25:02,686 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:02,693 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:25:02,697 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-22 02:25:02,707 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:02,710 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:25:02,728 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:02,729 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:02,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608522910] [2021-02-22 02:25:02,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:25:02,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-22 02:25:02,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262694060] [2021-02-22 02:25:02,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-22 02:25:02,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:25:02,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-22 02:25:02,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-02-22 02:25:02,738 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 11 states. [2021-02-22 02:25:03,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:25:03,394 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-02-22 02:25:03,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-22 02:25:03,395 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2021-02-22 02:25:03,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:25:03,397 INFO L225 Difference]: With dead ends: 40 [2021-02-22 02:25:03,397 INFO L226 Difference]: Without dead ends: 0 [2021-02-22 02:25:03,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-02-22 02:25:03,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-22 02:25:03,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-22 02:25:03,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-22 02:25:03,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-22 02:25:03,405 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2021-02-22 02:25:03,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:25:03,405 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-22 02:25:03,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-22 02:25:03,406 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-22 02:25:03,406 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-22 02:25:03,407 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-22 02:25:03,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-22 02:25:04,111 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-22 02:25:04,112 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-22 02:25:04,112 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-22 02:25:04,113 INFO L192 CegarLoopUtils]: At program point L3-2(line 3) the Hoare annotation is: true [2021-02-22 02:25:04,113 INFO L192 CegarLoopUtils]: At program point L3-3(line 3) the Hoare annotation is: true [2021-02-22 02:25:04,115 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-22 02:25:04,115 INFO L192 CegarLoopUtils]: At program point L3-4(line 3) the Hoare annotation is: true [2021-02-22 02:25:04,117 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-22 02:25:04,117 INFO L192 CegarLoopUtils]: At program point L3-5(line 3) the Hoare annotation is: true [2021-02-22 02:25:04,118 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 3) the Hoare annotation is: true [2021-02-22 02:25:04,120 INFO L192 CegarLoopUtils]: At program point L3-6(line 3) the Hoare annotation is: true [2021-02-22 02:25:04,120 INFO L192 CegarLoopUtils]: At program point L3-7(line 3) the Hoare annotation is: true [2021-02-22 02:25:04,120 INFO L192 CegarLoopUtils]: At program point L3-8(line 3) the Hoare annotation is: true [2021-02-22 02:25:04,121 INFO L192 CegarLoopUtils]: At program point L3-9(line 3) the Hoare annotation is: true [2021-02-22 02:25:04,121 INFO L192 CegarLoopUtils]: At program point L3-10(line 3) the Hoare annotation is: true [2021-02-22 02:25:04,121 INFO L192 CegarLoopUtils]: At program point L3-11(line 3) the Hoare annotation is: true [2021-02-22 02:25:04,121 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-22 02:25:04,121 INFO L192 CegarLoopUtils]: At program point L3(line 3) the Hoare annotation is: true [2021-02-22 02:25:04,122 INFO L192 CegarLoopUtils]: At program point L3-1(line 3) the Hoare annotation is: true [2021-02-22 02:25:04,122 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-22 02:25:04,122 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-22 02:25:04,122 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-22 02:25:04,122 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-22 02:25:04,122 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-22 02:25:04,123 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2021-02-22 02:25:04,123 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 11 18) the Hoare annotation is: true [2021-02-22 02:25:04,123 INFO L192 CegarLoopUtils]: At program point L16(line 16) the Hoare annotation is: true [2021-02-22 02:25:04,123 INFO L185 CegarLoopUtils]: At program point L14(line 14) the Hoare annotation is: (and (<= main_~x~0 (* 2 (div main_~x~0 2))) (<= 0 main_~x~0)) [2021-02-22 02:25:04,124 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 11 18) the Hoare annotation is: true [2021-02-22 02:25:04,125 INFO L185 CegarLoopUtils]: At program point L13-1(lines 13 15) the Hoare annotation is: (and (<= main_~x~0 (* 2 (div main_~x~0 2))) (<= 0 main_~x~0)) [2021-02-22 02:25:04,126 INFO L185 CegarLoopUtils]: At program point L13-2(line 13) the Hoare annotation is: (and (<= main_~x~0 (* 2 (div main_~x~0 2))) (<= 0 main_~x~0)) [2021-02-22 02:25:04,131 INFO L185 CegarLoopUtils]: At program point L13-4(line 13) the Hoare annotation is: (and (<= main_~x~0 (* 2 (div main_~x~0 2))) (<= 0 main_~x~0)) [2021-02-22 02:25:04,132 INFO L185 CegarLoopUtils]: At program point L13-5(lines 13 15) the Hoare annotation is: (and (<= main_~x~0 (* 2 (div main_~x~0 2))) (<= 0 main_~x~0)) [2021-02-22 02:25:04,132 INFO L185 CegarLoopUtils]: At program point L13-6(lines 13 15) the Hoare annotation is: (and (<= main_~x~0 (* 2 (div main_~x~0 2))) (<= 0 main_~x~0)) [2021-02-22 02:25:04,133 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2021-02-22 02:25:04,139 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 5 10) the Hoare annotation is: true [2021-02-22 02:25:04,139 INFO L185 CegarLoopUtils]: At program point L7(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-22 02:25:04,139 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))) [2021-02-22 02:25:04,140 INFO L185 CegarLoopUtils]: At program point L7-1(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-22 02:25:04,140 INFO L192 CegarLoopUtils]: At program point L6-2(lines 5 10) the Hoare annotation is: true [2021-02-22 02:25:04,144 INFO L185 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-22 02:25:04,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 02:25:04 BoogieIcfgContainer [2021-02-22 02:25:04,174 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 02:25:04,182 INFO L168 Benchmark]: Toolchain (without parser) took 5441.18 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 133.4 MB in the beginning and 133.7 MB in the end (delta: -267.6 kB). Peak memory consumption was 98.1 MB. Max. memory is 8.0 GB. [2021-02-22 02:25:04,183 INFO L168 Benchmark]: CDTParser took 0.42 ms. Allocated memory is still 151.0 MB. Free memory is still 125.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:25:04,186 INFO L168 Benchmark]: CACSL2BoogieTranslator took 295.16 ms. Allocated memory is still 151.0 MB. Free memory was 132.4 MB in the beginning and 123.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-22 02:25:04,194 INFO L168 Benchmark]: Boogie Preprocessor took 59.25 ms. Allocated memory is still 151.0 MB. Free memory was 123.0 MB in the beginning and 121.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-22 02:25:04,195 INFO L168 Benchmark]: RCFGBuilder took 910.95 ms. Allocated memory is still 151.0 MB. Free memory was 121.5 MB in the beginning and 122.3 MB in the end (delta: -789.1 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-22 02:25:04,196 INFO L168 Benchmark]: TraceAbstraction took 4154.06 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 121.9 MB in the beginning and 133.7 MB in the end (delta: -11.8 MB). Peak memory consumption was 87.0 MB. Max. memory is 8.0 GB. [2021-02-22 02:25:04,203 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.42 ms. Allocated memory is still 151.0 MB. Free memory is still 125.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 295.16 ms. Allocated memory is still 151.0 MB. Free memory was 132.4 MB in the beginning and 123.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 59.25 ms. Allocated memory is still 151.0 MB. Free memory was 123.0 MB in the beginning and 121.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 910.95 ms. Allocated memory is still 151.0 MB. Free memory was 121.5 MB in the beginning and 122.3 MB in the end (delta: -789.1 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4154.06 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 121.9 MB in the beginning and 133.7 MB in the end (delta: -11.8 MB). Peak memory consumption was 87.0 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: 13]: Loop Invariant Derived loop invariant: x <= 2 * (x / 2) && 0 <= x - ProcedureContractResult [Line: 11]: 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, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.2s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 92 SDtfs, 65 SDslu, 188 SDs, 0 SdLazy, 130 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 38 LocationsWithAnnotation, 59 PreInvPairs, 83 NumberOfFragments, 141 HoareAnnotationTreeSize, 59 FomulaSimplifications, 396 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 38 FomulaSimplificationsInter, 875 FormulaSimplificationTreeSizeReductionInter, 0.4s 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...