/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/array_3-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 06:54:39,242 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 06:54:39,244 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 06:54:39,276 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-01 06:54:39,292 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-01 06:54:39,293 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-01 06:54:39,295 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-01 06:54:39,296 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-01 06:54:39,298 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-01 06:54:39,299 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-01 06:54:39,300 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-01 06:54:39,304 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-01 06:54:39,305 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-01 06:54:39,306 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-01 06:54:39,307 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-01 06:54:39,308 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-01 06:54:39,313 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-01 06:54:39,328 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-01 06:54:39,329 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-01 06:54:39,329 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-01 06:54:39,330 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 06:54:39,342 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 06:54:39,342 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 06:54:39,344 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 06:54:39,344 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 06:54:39,345 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 06:54:39,345 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 06:54:39,345 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 06:54:39,345 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 06:54:39,345 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 06:54:39,345 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 06:54:39,346 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 06:54:39,346 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 06:54:39,346 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 06:54:39,346 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 06:54:39,346 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 06:54:39,347 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 06:54:39,347 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 06:54:39,347 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 06:54:39,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 06:54:39,347 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 06:54:39,347 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-01 06:54:39,347 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-01 06:54:39,347 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-01 06:54:39,348 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 06:54:39,617 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 06:54:39,633 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 06:54:39,635 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 06:54:39,636 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 06:54:39,637 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 06:54:39,637 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i [2021-05-01 06:54:39,695 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1391570a/7a0d7ee9cffd42c8933991c581ee9ea7/FLAG31244ff1c [2021-05-01 06:54:40,189 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 06:54:40,190 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-1.i [2021-05-01 06:54:40,194 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1391570a/7a0d7ee9cffd42c8933991c581ee9ea7/FLAG31244ff1c [2021-05-01 06:54:40,675 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1391570a/7a0d7ee9cffd42c8933991c581ee9ea7 [2021-05-01 06:54:40,677 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 06:54:40,678 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-01 06:54:40,680 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 06:54:40,680 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 06:54:40,683 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 06:54:40,683 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 06:54:40" (1/1) ... [2021-05-01 06:54:40,684 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@617d96b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:54:40, skipping insertion in model container [2021-05-01 06:54:40,684 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 06:54:40" (1/1) ... [2021-05-01 06:54:40,689 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 06:54:40,698 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 06:54:40,778 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/array_3-1.i[849,862] [2021-05-01 06:54:40,785 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 06:54:40,799 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 06:54:40,809 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/array_3-1.i[849,862] [2021-05-01 06:54:40,836 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 06:54:40,848 INFO L208 MainTranslator]: Completed translation [2021-05-01 06:54:40,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:54:40 WrapperNode [2021-05-01 06:54:40,848 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 06:54:40,849 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 06:54:40,849 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 06:54:40,850 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 06:54:40,856 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:54:40" (1/1) ... [2021-05-01 06:54:40,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:54:40" (1/1) ... [2021-05-01 06:54:40,860 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:54:40" (1/1) ... [2021-05-01 06:54:40,860 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:54:40" (1/1) ... [2021-05-01 06:54:40,871 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:54:40" (1/1) ... [2021-05-01 06:54:40,875 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:54:40" (1/1) ... [2021-05-01 06:54:40,877 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:54:40" (1/1) ... [2021-05-01 06:54:40,883 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 06:54:40,883 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 06:54:40,883 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 06:54:40,883 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 06:54:40,884 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:54:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 06:54:40,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 06:54:40,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 06:54:40,942 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 06:54:40,942 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 06:54:40,942 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 06:54:40,942 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 06:54:40,942 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 06:54:40,943 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-01 06:54:40,943 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-01 06:54:40,943 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 06:54:40,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 06:54:40,943 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-01 06:54:40,944 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 06:54:40,944 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 06:54:40,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 06:54:40,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 06:54:40,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 06:54:40,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 06:54:40,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 06:54:40,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 06:54:41,158 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 06:54:41,163 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-01 06:54:41,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 06:54:41 BoogieIcfgContainer [2021-05-01 06:54:41,164 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 06:54:41,165 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 06:54:41,165 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 06:54:41,167 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 06:54:41,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 06:54:40" (1/3) ... [2021-05-01 06:54:41,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6daa140c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 06:54:41, skipping insertion in model container [2021-05-01 06:54:41,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:54:40" (2/3) ... [2021-05-01 06:54:41,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6daa140c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 06:54:41, skipping insertion in model container [2021-05-01 06:54:41,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 06:54:41" (3/3) ... [2021-05-01 06:54:41,169 INFO L111 eAbstractionObserver]: Analyzing ICFG array_3-1.i [2021-05-01 06:54:41,172 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-01 06:54:41,187 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 06:54:41,197 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 06:54:41,209 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 06:54:41,209 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-01 06:54:41,209 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-01 06:54:41,209 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 06:54:41,209 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 06:54:41,209 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 06:54:41,209 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 06:54:41,209 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 06:54:41,218 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 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 06:54:41,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-01 06:54:41,223 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:54:41,223 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:54:41,223 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:54:41,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:54:41,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1037683284, now seen corresponding path program 1 times [2021-05-01 06:54:41,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:54:41,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132014880] [2021-05-01 06:54:41,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:54:41,271 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:54:41,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:54:41,382 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:54:41,382 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:54:41,383 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:54:41,383 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:54:41,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:54:41,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:54:41,414 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:54:41,414 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:54:41,415 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 06:54:41,417 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:54:41,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132014880] [2021-05-01 06:54:41,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [132014880] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:54:41,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:54:41,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-01 06:54:41,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807463208] [2021-05-01 06:54:41,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-01 06:54:41,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:54:41,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-01 06:54:41,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 06:54:41,432 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 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 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 06:54:41,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:54:41,496 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-05-01 06:54:41,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-01 06:54:41,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 13 [2021-05-01 06:54:41,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:54:41,502 INFO L225 Difference]: With dead ends: 42 [2021-05-01 06:54:41,502 INFO L226 Difference]: Without dead ends: 18 [2021-05-01 06:54:41,505 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 06:54:41,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-01 06:54:41,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-05-01 06:54:41,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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 06:54:41,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-05-01 06:54:41,534 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2021-05-01 06:54:41,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:54:41,535 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-05-01 06:54:41,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 06:54:41,535 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-05-01 06:54:41,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-01 06:54:41,536 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:54:41,536 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:54:41,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 06:54:41,536 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:54:41,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:54:41,537 INFO L82 PathProgramCache]: Analyzing trace with hash -193552662, now seen corresponding path program 1 times [2021-05-01 06:54:41,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:54:41,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703330299] [2021-05-01 06:54:41,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:54:41,547 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:54:41,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:54:41,578 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:54:41,578 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:54:41,579 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:54:41,579 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:54:41,582 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:54:41,583 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:54:41,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:54:41,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:54:41,603 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:54:41,603 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:54:41,604 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 06:54:41,604 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:54:41,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703330299] [2021-05-01 06:54:41,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1703330299] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:54:41,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:54:41,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-01 06:54:41,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338268404] [2021-05-01 06:54:41,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-01 06:54:41,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:54:41,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-01 06:54:41,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-01 06:54:41,613 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 06:54:41,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:54:41,673 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-05-01 06:54:41,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-01 06:54:41,673 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 14 [2021-05-01 06:54:41,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:54:41,675 INFO L225 Difference]: With dead ends: 35 [2021-05-01 06:54:41,675 INFO L226 Difference]: Without dead ends: 25 [2021-05-01 06:54:41,675 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-01 06:54:41,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-01 06:54:41,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-05-01 06:54:41,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 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 06:54:41,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-05-01 06:54:41,680 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2021-05-01 06:54:41,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:54:41,680 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-05-01 06:54:41,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 06:54:41,680 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-05-01 06:54:41,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-01 06:54:41,681 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:54:41,681 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:54:41,681 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 06:54:41,681 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:54:41,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:54:41,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1156315956, now seen corresponding path program 1 times [2021-05-01 06:54:41,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:54:41,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025420665] [2021-05-01 06:54:41,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:54:41,694 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:54:41,695 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:54:41,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:54:41,710 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:54:41,711 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:54:41,711 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:54:41,711 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:54:41,714 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:54:41,714 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:54:41,717 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:54:41,717 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:54:41,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:54:41,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:54:41,735 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:54:41,735 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:54:41,736 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 06:54:41,736 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:54:41,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025420665] [2021-05-01 06:54:41,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2025420665] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:54:41,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:54:41,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-01 06:54:41,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248395669] [2021-05-01 06:54:41,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-01 06:54:41,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:54:41,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-01 06:54:41,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-01 06:54:41,737 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 06:54:41,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:54:41,793 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2021-05-01 06:54:41,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-01 06:54:41,794 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 16 [2021-05-01 06:54:41,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:54:41,795 INFO L225 Difference]: With dead ends: 45 [2021-05-01 06:54:41,795 INFO L226 Difference]: Without dead ends: 32 [2021-05-01 06:54:41,796 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.1ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-01 06:54:41,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-01 06:54:41,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2021-05-01 06:54:41,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 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 06:54:41,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-05-01 06:54:41,810 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2021-05-01 06:54:41,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:54:41,810 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-05-01 06:54:41,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 06:54:41,810 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-05-01 06:54:41,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-01 06:54:41,811 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:54:41,811 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:54:41,811 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-01 06:54:41,811 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:54:41,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:54:41,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1341094446, now seen corresponding path program 2 times [2021-05-01 06:54:41,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:54:41,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538431135] [2021-05-01 06:54:41,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:54:41,821 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:54:41,822 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:54:41,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:54:41,855 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:54:41,855 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:54:41,859 INFO L142 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-05-01 06:54:41,860 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:54:41,862 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:54:41,862 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:54:41,865 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:54:41,866 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:54:41,872 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:54:41,872 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:54:41,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:54:41,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:54:41,907 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:54:41,907 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:54:41,907 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 06:54:41,908 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:54:41,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538431135] [2021-05-01 06:54:41,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [538431135] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:54:41,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:54:41,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-01 06:54:41,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736574345] [2021-05-01 06:54:41,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-01 06:54:41,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:54:41,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-01 06:54:41,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-01 06:54:41,909 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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 06:54:41,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:54:41,994 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2021-05-01 06:54:41,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-01 06:54:41,995 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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 18 [2021-05-01 06:54:41,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:54:41,997 INFO L225 Difference]: With dead ends: 33 [2021-05-01 06:54:41,998 INFO L226 Difference]: Without dead ends: 28 [2021-05-01 06:54:41,998 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 68.0ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-01 06:54:41,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-01 06:54:42,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-01 06:54:42,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 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 06:54:42,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-05-01 06:54:42,007 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 18 [2021-05-01 06:54:42,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:54:42,007 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-05-01 06:54:42,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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 06:54:42,007 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-05-01 06:54:42,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-01 06:54:42,008 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:54:42,009 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:54:42,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-01 06:54:42,009 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:54:42,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:54:42,009 INFO L82 PathProgramCache]: Analyzing trace with hash -746180299, now seen corresponding path program 1 times [2021-05-01 06:54:42,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:54:42,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436603590] [2021-05-01 06:54:42,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:54:42,014 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:54:42,015 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:54:42,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:54:42,045 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:54:42,045 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:54:42,046 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:54:42,046 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:54:42,049 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:54:42,049 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:54:42,052 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:54:42,052 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:54:42,055 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:54:42,056 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:54:42,060 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:54:42,060 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:54:42,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:54:42,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:54:42,081 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:54:42,081 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:54:42,082 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 06:54:42,082 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:54:42,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436603590] [2021-05-01 06:54:42,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [436603590] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:54:42,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:54:42,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-01 06:54:42,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420439398] [2021-05-01 06:54:42,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-01 06:54:42,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:54:42,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-01 06:54:42,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-01 06:54:42,084 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 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 06:54:42,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:54:42,179 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2021-05-01 06:54:42,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-01 06:54:42,180 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 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 22 [2021-05-01 06:54:42,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:54:42,180 INFO L225 Difference]: With dead ends: 35 [2021-05-01 06:54:42,180 INFO L226 Difference]: Without dead ends: 30 [2021-05-01 06:54:42,181 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 65.0ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-01 06:54:42,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-01 06:54:42,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-05-01 06:54:42,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 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 06:54:42,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-05-01 06:54:42,184 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2021-05-01 06:54:42,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:54:42,184 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-05-01 06:54:42,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 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 06:54:42,185 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-05-01 06:54:42,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-01 06:54:42,185 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:54:42,185 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:54:42,185 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-01 06:54:42,185 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:54:42,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:54:42,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1353970500, now seen corresponding path program 2 times [2021-05-01 06:54:42,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:54:42,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130776035] [2021-05-01 06:54:42,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:54:42,190 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-01 06:54:42,191 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:54:42,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:54:42,208 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:54:42,208 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:54:42,209 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:54:42,209 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:54:42,211 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:54:42,212 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:54:42,214 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:54:42,215 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:54:42,218 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:54:42,218 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 06:54:42,222 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:54:42,222 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:54:42,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:54:42,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:54:42,240 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:54:42,240 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:54:42,240 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 06:54:42,241 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:54:42,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130776035] [2021-05-01 06:54:42,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2130776035] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:54:42,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:54:42,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-01 06:54:42,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106863935] [2021-05-01 06:54:42,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-01 06:54:42,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:54:42,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-01 06:54:42,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-01 06:54:42,242 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 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 06:54:42,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:54:42,309 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-05-01 06:54:42,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-01 06:54:42,310 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 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 26 [2021-05-01 06:54:42,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:54:42,310 INFO L225 Difference]: With dead ends: 28 [2021-05-01 06:54:42,310 INFO L226 Difference]: Without dead ends: 0 [2021-05-01 06:54:42,311 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 54.1ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-01 06:54:42,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-01 06:54:42,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-01 06:54:42,311 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 06:54:42,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-01 06:54:42,311 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2021-05-01 06:54:42,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:54:42,311 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-01 06:54:42,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 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 06:54:42,312 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-01 06:54:42,312 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-01 06:54:42,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-01 06:54:42,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-01 06:54:42,436 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2021-05-01 06:54:42,436 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2021-05-01 06:54:42,436 INFO L198 CegarLoopUtils]: For program point L12-1(line 12) no Hoare annotation was computed. [2021-05-01 06:54:42,436 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2021-05-01 06:54:42,437 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2021-05-01 06:54:42,437 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-05-01 06:54:42,437 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-05-01 06:54:42,437 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-01 06:54:42,437 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-01 06:54:42,437 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-05-01 06:54:42,437 INFO L201 CegarLoopUtils]: At program point L33(line 33) the Hoare annotation is: true [2021-05-01 06:54:42,437 INFO L194 CegarLoopUtils]: At program point L29(lines 29 31) the Hoare annotation is: (<= main_~i~0 1023) [2021-05-01 06:54:42,437 INFO L201 CegarLoopUtils]: At program point mainEXIT(lines 20 34) the Hoare annotation is: true [2021-05-01 06:54:42,437 INFO L201 CegarLoopUtils]: At program point mainFINAL(lines 20 34) the Hoare annotation is: true [2021-05-01 06:54:42,437 INFO L194 CegarLoopUtils]: At program point mainENTRY(lines 20 34) the Hoare annotation is: (and (= |old(#length)| |#length|) (= |old(#valid)| |#valid|)) [2021-05-01 06:54:42,437 INFO L194 CegarLoopUtils]: At program point L28-1(lines 28 32) the Hoare annotation is: (<= main_~i~0 1023) [2021-05-01 06:54:42,438 INFO L194 CegarLoopUtils]: At program point L28-3(lines 28 32) the Hoare annotation is: (<= main_~i~0 1022) [2021-05-01 06:54:42,438 INFO L194 CegarLoopUtils]: At program point L28-4(lines 28 32) the Hoare annotation is: (<= main_~i~0 1023) [2021-05-01 06:54:42,438 INFO L194 CegarLoopUtils]: At program point L28-5(lines 28 32) the Hoare annotation is: (<= main_~i~0 1024) [2021-05-01 06:54:42,438 INFO L194 CegarLoopUtils]: At program point L24-2(lines 24 26) the Hoare annotation is: (<= main_~i~0 1023) [2021-05-01 06:54:42,438 INFO L201 CegarLoopUtils]: At program point L24-3(lines 24 26) the Hoare annotation is: true [2021-05-01 06:54:42,438 INFO L201 CegarLoopUtils]: At program point L24-4(lines 24 26) the Hoare annotation is: true [2021-05-01 06:54:42,438 INFO L194 CegarLoopUtils]: At program point L16(line 16) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-05-01 06:54:42,438 INFO L194 CegarLoopUtils]: At program point L15(lines 15 17) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-05-01 06:54:42,438 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 14 19) the Hoare annotation is: true [2021-05-01 06:54:42,438 INFO L201 CegarLoopUtils]: At program point L15-2(lines 14 19) the Hoare annotation is: true [2021-05-01 06:54:42,438 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 14 19) the Hoare annotation is: true [2021-05-01 06:54:42,439 INFO L194 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-05-01 06:54:42,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 06:54:42 BoogieIcfgContainer [2021-05-01 06:54:42,448 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 06:54:42,452 INFO L168 Benchmark]: Toolchain (without parser) took 1773.54 ms. Allocated memory was 208.7 MB in the beginning and 250.6 MB in the end (delta: 41.9 MB). Free memory was 173.3 MB in the beginning and 164.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 52.0 MB. Max. memory is 8.0 GB. [2021-05-01 06:54:42,452 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 208.7 MB. Free memory is still 189.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 06:54:42,452 INFO L168 Benchmark]: CACSL2BoogieTranslator took 168.51 ms. Allocated memory is still 208.7 MB. Free memory was 173.1 MB in the beginning and 191.4 MB in the end (delta: -18.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-01 06:54:42,453 INFO L168 Benchmark]: Boogie Preprocessor took 33.82 ms. Allocated memory is still 208.7 MB. Free memory was 191.4 MB in the beginning and 189.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-01 06:54:42,453 INFO L168 Benchmark]: RCFGBuilder took 281.09 ms. Allocated memory is still 208.7 MB. Free memory was 189.8 MB in the beginning and 175.2 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-01 06:54:42,453 INFO L168 Benchmark]: TraceAbstraction took 1285.89 ms. Allocated memory was 208.7 MB in the beginning and 250.6 MB in the end (delta: 41.9 MB). Free memory was 174.6 MB in the beginning and 164.1 MB in the end (delta: 10.6 MB). Peak memory consumption was 54.1 MB. Max. memory is 8.0 GB. [2021-05-01 06:54:42,455 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 208.7 MB. Free memory is still 189.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 168.51 ms. Allocated memory is still 208.7 MB. Free memory was 173.1 MB in the beginning and 191.4 MB in the end (delta: -18.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.82 ms. Allocated memory is still 208.7 MB. Free memory was 191.4 MB in the beginning and 189.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 281.09 ms. Allocated memory is still 208.7 MB. Free memory was 189.8 MB in the beginning and 175.2 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1285.89 ms. Allocated memory was 208.7 MB in the beginning and 250.6 MB in the end (delta: 41.9 MB). Free memory was 174.6 MB in the beginning and 164.1 MB in the end (delta: 10.6 MB). Peak memory consumption was 54.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: 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, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1104.8ms, OverallIterations: 6, TraceHistogramMax: 3, EmptinessCheckTime: 11.3ms, AutomataDifference: 459.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 123.5ms, InitialAbstractionConstructionTime: 5.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 84 SDtfs, 55 SDslu, 123 SDs, 0 SdLazy, 250 SolverSat, 33 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 185.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 241.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=3, InterpolantAutomatonStates: 32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 50.5ms AutomataMinimizationTime, 6 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 25 LocationsWithAnnotation, 55 PreInvPairs, 88 NumberOfFragments, 78 HoareAnnotationTreeSize, 55 FomulaSimplifications, 48 FormulaSimplificationTreeSizeReduction, 50.9ms HoareSimplificationTime, 25 FomulaSimplificationsInter, 194 FormulaSimplificationTreeSizeReductionInter, 64.5ms 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: 28]: Loop Invariant Derived loop invariant: i <= 1023 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - ProcedureContractResult [Line: 20]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 RESULT: Ultimate proved your program to be correct! Received shutdown request...