/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/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/simple_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 07:07:14,983 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 07:07:14,985 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 07:07:15,018 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-01 07:07:15,031 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-01 07:07:15,032 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-01 07:07:15,033 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-01 07:07:15,034 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-01 07:07:15,035 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-01 07:07:15,036 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-01 07:07:15,037 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-01 07:07:15,039 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-01 07:07:15,041 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-01 07:07:15,043 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-01 07:07:15,044 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-01 07:07:15,045 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-01 07:07:15,048 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-01 07:07:15,062 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-01 07:07:15,063 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-01 07:07:15,064 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-01 07:07:15,071 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-01 07:07:15,091 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 07:07:15,091 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 07:07:15,096 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 07:07:15,097 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 07:07:15,097 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 07:07:15,097 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 07:07:15,097 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 07:07:15,097 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 07:07:15,098 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 07:07:15,098 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 07:07:15,099 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 07:07:15,099 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 07:07:15,099 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 07:07:15,100 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 07:07:15,100 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 07:07:15,100 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 07:07:15,100 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 07:07:15,100 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 07:07:15,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 07:07:15,101 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 07:07:15,101 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-01 07:07:15,101 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-01 07:07:15,101 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-01 07:07:15,101 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 07:07:15,539 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 07:07:15,563 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 07:07:15,566 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 07:07:15,568 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 07:07:15,569 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 07:07:15,570 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/simple_1-2.c [2021-05-01 07:07:15,673 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c36dc108/c0935861680b42be8a6defcffebffc14/FLAG49800408f [2021-05-01 07:07:16,302 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 07:07:16,303 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/simple_1-2.c [2021-05-01 07:07:16,311 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c36dc108/c0935861680b42be8a6defcffebffc14/FLAG49800408f [2021-05-01 07:07:16,687 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c36dc108/c0935861680b42be8a6defcffebffc14 [2021-05-01 07:07:16,691 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 07:07:16,695 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-01 07:07:16,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 07:07:16,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 07:07:16,705 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 07:07:16,706 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 07:07:16" (1/1) ... [2021-05-01 07:07:16,707 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e0f47bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:07:16, skipping insertion in model container [2021-05-01 07:07:16,708 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 07:07:16" (1/1) ... [2021-05-01 07:07:16,717 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 07:07:16,733 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 07:07:16,890 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/simple_1-2.c[322,335] [2021-05-01 07:07:16,905 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 07:07:16,915 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 07:07:16,937 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/simple_1-2.c[322,335] [2021-05-01 07:07:16,942 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 07:07:16,981 INFO L208 MainTranslator]: Completed translation [2021-05-01 07:07:16,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:07:16 WrapperNode [2021-05-01 07:07:16,982 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 07:07:16,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 07:07:16,985 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 07:07:16,985 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 07:07:16,997 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:07:16" (1/1) ... [2021-05-01 07:07:16,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:07:16" (1/1) ... [2021-05-01 07:07:17,006 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:07:16" (1/1) ... [2021-05-01 07:07:17,007 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:07:16" (1/1) ... [2021-05-01 07:07:17,023 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:07:16" (1/1) ... [2021-05-01 07:07:17,036 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:07:16" (1/1) ... [2021-05-01 07:07:17,048 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:07:16" (1/1) ... [2021-05-01 07:07:17,050 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 07:07:17,052 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 07:07:17,052 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 07:07:17,052 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 07:07:17,053 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:07:16" (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 [2021-05-01 07:07:17,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 07:07:17,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 07:07:17,152 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 07:07:17,152 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 07:07:17,152 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 07:07:17,152 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 07:07:17,152 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 07:07:17,153 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 07:07:17,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 07:07:17,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 07:07:17,153 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 07:07:17,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 07:07:17,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 07:07:17,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 07:07:17,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 07:07:17,153 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 07:07:17,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 07:07:17,474 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 07:07:17,475 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-01 07:07:17,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 07:07:17 BoogieIcfgContainer [2021-05-01 07:07:17,476 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 07:07:17,478 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 07:07:17,478 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 07:07:17,481 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 07:07:17,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 07:07:16" (1/3) ... [2021-05-01 07:07:17,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a7c2c2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 07:07:17, skipping insertion in model container [2021-05-01 07:07:17,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:07:16" (2/3) ... [2021-05-01 07:07:17,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a7c2c2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 07:07:17, skipping insertion in model container [2021-05-01 07:07:17,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 07:07:17" (3/3) ... [2021-05-01 07:07:17,485 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_1-2.c [2021-05-01 07:07:17,491 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-01 07:07:17,494 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 07:07:17,511 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 07:07:17,531 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 07:07:17,531 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-01 07:07:17,531 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-01 07:07:17,531 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 07:07:17,531 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 07:07:17,531 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 07:07:17,531 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 07:07:17,532 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 07:07:17,545 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-01 07:07:17,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-01 07:07:17,555 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 07:07:17,557 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 07:07:17,557 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 07:07:17,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 07:07:17,563 INFO L82 PathProgramCache]: Analyzing trace with hash -219174432, now seen corresponding path program 1 times [2021-05-01 07:07:17,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 07:07:17,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792237305] [2021-05-01 07:07:17,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 07:07:17,658 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 07:07:17,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:07:17,807 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:17,809 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:07:17,812 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:17,814 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:07:17,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 07:07:17,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:07:17,978 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:17,979 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:07:17,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 07:07:17,983 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 07:07:17,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792237305] [2021-05-01 07:07:17,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1792237305] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 07:07:17,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 07:07:17,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-01 07:07:17,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255955622] [2021-05-01 07:07:17,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-01 07:07:17,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 07:07:18,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-01 07:07:18,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 07:07:18,006 INFO L87 Difference]: Start difference. First operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-01 07:07:18,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 07:07:18,102 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-05-01 07:07:18,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-01 07:07:18,107 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-01 07:07:18,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 07:07:18,117 INFO L225 Difference]: With dead ends: 29 [2021-05-01 07:07:18,118 INFO L226 Difference]: Without dead ends: 12 [2021-05-01 07:07:18,123 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 115.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 07:07:18,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-05-01 07:07:18,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-05-01 07:07:18,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-01 07:07:18,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2021-05-01 07:07:18,173 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 11 [2021-05-01 07:07:18,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 07:07:18,174 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2021-05-01 07:07:18,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-01 07:07:18,175 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2021-05-01 07:07:18,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-01 07:07:18,177 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 07:07:18,177 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 07:07:18,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 07:07:18,178 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 07:07:18,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 07:07:18,179 INFO L82 PathProgramCache]: Analyzing trace with hash -222868516, now seen corresponding path program 1 times [2021-05-01 07:07:18,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 07:07:18,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626069277] [2021-05-01 07:07:18,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 07:07:18,194 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 07:07:18,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:07:18,254 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:18,255 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:07:18,257 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:18,258 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 07:07:18,276 INFO L142 QuantifierPusher]: treesize reduction 1, result has 97.4 percent of original size [2021-05-01 07:07:18,279 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-01 07:07:18,283 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:18,284 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:07:18,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 07:07:18,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:07:18,323 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:18,324 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:07:18,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 07:07:18,325 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 07:07:18,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626069277] [2021-05-01 07:07:18,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [626069277] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 07:07:18,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 07:07:18,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-01 07:07:18,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765267402] [2021-05-01 07:07:18,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-01 07:07:18,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 07:07:18,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-01 07:07:18,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-01 07:07:18,329 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-01 07:07:18,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 07:07:18,394 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-05-01 07:07:18,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-01 07:07:18,395 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-01 07:07:18,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 07:07:18,396 INFO L225 Difference]: With dead ends: 18 [2021-05-01 07:07:18,396 INFO L226 Difference]: Without dead ends: 13 [2021-05-01 07:07:18,397 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-01 07:07:18,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-05-01 07:07:18,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-05-01 07:07:18,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-01 07:07:18,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-05-01 07:07:18,403 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2021-05-01 07:07:18,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 07:07:18,403 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-05-01 07:07:18,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-01 07:07:18,404 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-05-01 07:07:18,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-01 07:07:18,404 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 07:07:18,404 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 07:07:18,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 07:07:18,405 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 07:07:18,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 07:07:18,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1717471862, now seen corresponding path program 1 times [2021-05-01 07:07:18,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 07:07:18,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141363730] [2021-05-01 07:07:18,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 07:07:18,453 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:18,468 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 07:07:18,469 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~x~0_8 4294967296) 268435455) InVars {main_~x~0=v_main_~x~0_8} OutVars{main_~x~0=v_main_~x~0_8} AuxVars[] AssignedVars[] [2021-05-01 07:07:18,485 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.5 percent of original size [2021-05-01 07:07:18,512 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:18,517 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:18,522 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:18,525 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:18,611 INFO L108 tifierPushTermWalker]: treesize reduction 13, result has 7.1 percent of original size [2021-05-01 07:07:18,637 INFO L108 tifierPushTermWalker]: treesize reduction 2, result has 33.3 percent of original size [2021-05-01 07:07:18,669 INFO L108 tifierPushTermWalker]: treesize reduction 13, result has 7.1 percent of original size [2021-05-01 07:07:18,681 INFO L108 tifierPushTermWalker]: treesize reduction 28, result has 3.4 percent of original size [2021-05-01 07:07:18,691 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:18,695 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-01 07:07:18,709 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:18,724 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:18,730 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:18,742 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:18,748 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:18,750 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.5 percent of original size 58 [2021-05-01 07:07:18,804 INFO L142 QuantifierPusher]: treesize reduction 8, result has 90.8 percent of original size [2021-05-01 07:07:18,805 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 79 [2021-05-01 07:07:18,806 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-01 07:07:18,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:07:18,904 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:18,905 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:07:18,906 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:18,906 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 07:07:18,910 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:18,911 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-05-01 07:07:18,924 INFO L142 QuantifierPusher]: treesize reduction 1, result has 98.2 percent of original size [2021-05-01 07:07:18,926 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-05-01 07:07:18,932 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:18,932 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 07:07:18,936 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:18,937 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 07:07:18,941 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:18,942 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:07:18,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 07:07:18,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:07:18,971 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:18,972 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:07:18,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 07:07:18,981 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:18,985 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-05-01 07:07:19,060 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:19,062 INFO L147 QuantifierPusher]: treesize reduction 2, result has 96.5 percent of original size 55 [2021-05-01 07:07:19,097 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:19,098 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:07:19,098 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 07:07:19,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141363730] [2021-05-01 07:07:19,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2141363730] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 07:07:19,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 07:07:19,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-01 07:07:19,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391177429] [2021-05-01 07:07:19,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-01 07:07:19,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 07:07:19,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-01 07:07:19,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-01 07:07:19,100 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-01 07:07:19,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 07:07:19,328 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2021-05-01 07:07:19,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-01 07:07:19,328 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-01 07:07:19,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 07:07:19,329 INFO L225 Difference]: With dead ends: 17 [2021-05-01 07:07:19,329 INFO L226 Difference]: Without dead ends: 0 [2021-05-01 07:07:19,330 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 287.5ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-05-01 07:07:19,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-01 07:07:19,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-01 07:07:19,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-01 07:07:19,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-01 07:07:19,330 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2021-05-01 07:07:19,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 07:07:19,331 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-01 07:07:19,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-01 07:07:19,331 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-01 07:07:19,331 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-01 07:07:19,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-01 07:07:19,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-01 07:07:19,488 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-05-01 07:07:19,489 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-05-01 07:07:19,489 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-05-01 07:07:19,489 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2021-05-01 07:07:19,489 INFO L194 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|)) [2021-05-01 07:07:19,489 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-05-01 07:07:19,490 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-05-01 07:07:19,490 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-01 07:07:19,490 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-01 07:07:19,490 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-05-01 07:07:19,490 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 12 20) the Hoare annotation is: true [2021-05-01 07:07:19,490 INFO L201 CegarLoopUtils]: At program point mainEXIT(lines 12 20) the Hoare annotation is: true [2021-05-01 07:07:19,490 INFO L194 CegarLoopUtils]: At program point L15-2(lines 15 17) the Hoare annotation is: (<= main_~x~0 (* 2 (div main_~x~0 2))) [2021-05-01 07:07:19,490 INFO L201 CegarLoopUtils]: At program point mainFINAL(lines 12 20) the Hoare annotation is: true [2021-05-01 07:07:19,491 INFO L194 CegarLoopUtils]: At program point L15-3(lines 15 17) the Hoare annotation is: (<= main_~x~0 (* 2 (div main_~x~0 2))) [2021-05-01 07:07:19,491 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2021-05-01 07:07:19,491 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 5 10) the Hoare annotation is: true [2021-05-01 07:07:19,491 INFO L194 CegarLoopUtils]: At program point L7(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-05-01 07:07:19,491 INFO L194 CegarLoopUtils]: At program point L6(lines 6 8) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-05-01 07:07:19,491 INFO L201 CegarLoopUtils]: At program point L6-2(lines 5 10) the Hoare annotation is: true [2021-05-01 07:07:19,491 INFO L194 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-05-01 07:07:19,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 07:07:19 BoogieIcfgContainer [2021-05-01 07:07:19,503 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 07:07:19,504 INFO L168 Benchmark]: Toolchain (without parser) took 2810.01 ms. Allocated memory is still 178.3 MB. Free memory was 143.1 MB in the beginning and 138.2 MB in the end (delta: 4.9 MB). Peak memory consumption was 65.1 MB. Max. memory is 8.0 GB. [2021-05-01 07:07:19,505 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 178.3 MB. Free memory is still 159.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 07:07:19,505 INFO L168 Benchmark]: CACSL2BoogieTranslator took 281.55 ms. Allocated memory is still 178.3 MB. Free memory was 142.8 MB in the beginning and 161.9 MB in the end (delta: -19.1 MB). Peak memory consumption was 12.8 MB. Max. memory is 8.0 GB. [2021-05-01 07:07:19,506 INFO L168 Benchmark]: Boogie Preprocessor took 66.40 ms. Allocated memory is still 178.3 MB. Free memory was 161.9 MB in the beginning and 160.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-01 07:07:19,506 INFO L168 Benchmark]: RCFGBuilder took 424.69 ms. Allocated memory is still 178.3 MB. Free memory was 160.6 MB in the beginning and 147.5 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-05-01 07:07:19,507 INFO L168 Benchmark]: TraceAbstraction took 2025.34 ms. Allocated memory is still 178.3 MB. Free memory was 147.5 MB in the beginning and 138.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 69.1 MB. Max. memory is 8.0 GB. [2021-05-01 07:07:19,508 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 178.3 MB. Free memory is still 159.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 281.55 ms. Allocated memory is still 178.3 MB. Free memory was 142.8 MB in the beginning and 161.9 MB in the end (delta: -19.1 MB). Peak memory consumption was 12.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 66.40 ms. Allocated memory is still 178.3 MB. Free memory was 161.9 MB in the beginning and 160.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 424.69 ms. Allocated memory is still 178.3 MB. Free memory was 160.6 MB in the beginning and 147.5 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2025.34 ms. Allocated memory is still 178.3 MB. Free memory was 147.5 MB in the beginning and 138.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 69.1 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1803.7ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 16.6ms, AutomataDifference: 429.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 155.9ms, InitialAbstractionConstructionTime: 9.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 32 SDtfs, 20 SDslu, 31 SDs, 0 SdLazy, 39 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 97.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 461.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, InterpolantAutomatonStates: 15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 38.4ms AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 18 LocationsWithAnnotation, 36 PreInvPairs, 49 NumberOfFragments, 71 HoareAnnotationTreeSize, 36 FomulaSimplifications, 41 FormulaSimplificationTreeSizeReduction, 49.9ms HoareSimplificationTime, 18 FomulaSimplificationsInter, 362 FormulaSimplificationTreeSizeReductionInter, 96.0ms 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: x <= 2 * (x / 2) - ProcedureContractResult [Line: 12]: 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...