/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/ldv-regression/test29-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 20:39:13,643 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 20:39:13,650 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 20:39:13,715 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 20:39:13,716 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 20:39:13,720 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 20:39:13,724 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 20:39:13,733 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 20:39:13,738 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 20:39:13,745 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 20:39:13,746 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 20:39:13,748 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 20:39:13,749 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 20:39:13,752 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 20:39:13,754 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 20:39:13,757 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 20:39:13,762 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 20:39:13,764 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 20:39:13,773 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 20:39:13,782 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 20:39:13,784 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 20:39:13,786 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 20:39:13,788 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 20:39:13,790 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 20:39:13,801 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 20:39:13,835 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 20:39:13,836 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 20:39:13,836 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 20:39:13,839 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 20:39:13,858 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 20:39:13,859 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 20:39:13,863 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 20:39:13,864 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 20:39:13,864 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 20:39:13,865 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 20:39:13,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 20:39:13,865 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 20:39:13,865 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 20:39:13,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 20:39:13,868 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 20:39:13,868 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 20:39:13,868 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 20:39:13,869 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 20:39:13,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 20:39:13,869 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 20:39:13,870 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 20:39:13,870 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 20:39:13,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 20:39:13,871 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 20:39:13,871 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 20:39:13,872 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 20:39:13,872 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 20:39:14,258 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 20:39:14,289 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 20:39:14,294 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 20:39:14,295 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 20:39:14,296 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 20:39:14,297 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test29-2.c [2021-02-21 20:39:14,386 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b6825a9d/0688099ac58a4c7189169a8fc1fd7db3/FLAG311cf0830 [2021-02-21 20:39:14,984 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 20:39:14,984 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test29-2.c [2021-02-21 20:39:14,991 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b6825a9d/0688099ac58a4c7189169a8fc1fd7db3/FLAG311cf0830 [2021-02-21 20:39:15,337 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b6825a9d/0688099ac58a4c7189169a8fc1fd7db3 [2021-02-21 20:39:15,344 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 20:39:15,360 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 20:39:15,365 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 20:39:15,365 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 20:39:15,369 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 20:39:15,370 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:39:15" (1/1) ... [2021-02-21 20:39:15,372 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ba1f22c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:39:15, skipping insertion in model container [2021-02-21 20:39:15,372 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:39:15" (1/1) ... [2021-02-21 20:39:15,381 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 20:39:15,398 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 20:39:15,591 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test29-2.c[580,593] [2021-02-21 20:39:15,602 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:39:15,618 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 20:39:15,642 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test29-2.c[580,593] [2021-02-21 20:39:15,645 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:39:15,673 INFO L208 MainTranslator]: Completed translation [2021-02-21 20:39:15,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:39:15 WrapperNode [2021-02-21 20:39:15,674 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 20:39:15,675 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 20:39:15,676 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 20:39:15,676 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 20:39:15,693 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:39:15" (1/1) ... [2021-02-21 20:39:15,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:39:15" (1/1) ... [2021-02-21 20:39:15,705 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:39:15" (1/1) ... [2021-02-21 20:39:15,705 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:39:15" (1/1) ... [2021-02-21 20:39:15,725 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:39:15" (1/1) ... [2021-02-21 20:39:15,728 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:39:15" (1/1) ... [2021-02-21 20:39:15,735 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:39:15" (1/1) ... [2021-02-21 20:39:15,745 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 20:39:15,750 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 20:39:15,750 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 20:39:15,750 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 20:39:15,751 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:39:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 20:39:15,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 20:39:15,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 20:39:15,881 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 20:39:15,882 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 20:39:15,882 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 20:39:15,882 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 20:39:15,882 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 20:39:15,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 20:39:15,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 20:39:15,883 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 20:39:15,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 20:39:15,884 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 20:39:15,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 20:39:15,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 20:39:15,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 20:39:15,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 20:39:16,267 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 20:39:16,268 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-21 20:39:16,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:39:16 BoogieIcfgContainer [2021-02-21 20:39:16,270 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 20:39:16,272 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 20:39:16,272 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 20:39:16,277 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 20:39:16,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 08:39:15" (1/3) ... [2021-02-21 20:39:16,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@341e4c88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:39:16, skipping insertion in model container [2021-02-21 20:39:16,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:39:15" (2/3) ... [2021-02-21 20:39:16,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@341e4c88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:39:16, skipping insertion in model container [2021-02-21 20:39:16,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:39:16" (3/3) ... [2021-02-21 20:39:16,282 INFO L111 eAbstractionObserver]: Analyzing ICFG test29-2.c [2021-02-21 20:39:16,292 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 20:39:16,302 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 20:39:16,386 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 20:39:16,464 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 20:39:16,465 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 20:39:16,465 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 20:39:16,465 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 20:39:16,465 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 20:39:16,466 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 20:39:16,466 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 20:39:16,466 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 20:39:16,485 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2021-02-21 20:39:16,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-21 20:39:16,495 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:39:16,497 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:39:16,498 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:39:16,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:39:16,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1684913090, now seen corresponding path program 1 times [2021-02-21 20:39:16,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:39:16,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284040337] [2021-02-21 20:39:16,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:39:16,643 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:39:16,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:39:16,908 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:16,911 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:39:16,925 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:16,926 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:39:16,948 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:16,950 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:39:16,965 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:16,969 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:39:17,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:39:17,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:39:17,036 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:17,037 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:39:17,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:39:17,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284040337] [2021-02-21 20:39:17,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:39:17,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 20:39:17,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584552895] [2021-02-21 20:39:17,057 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 20:39:17,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:39:17,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 20:39:17,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-21 20:39:17,076 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 5 states. [2021-02-21 20:39:17,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:39:17,313 INFO L93 Difference]: Finished difference Result 89 states and 96 transitions. [2021-02-21 20:39:17,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-21 20:39:17,315 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2021-02-21 20:39:17,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:39:17,331 INFO L225 Difference]: With dead ends: 89 [2021-02-21 20:39:17,332 INFO L226 Difference]: Without dead ends: 46 [2021-02-21 20:39:17,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 20:39:17,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-02-21 20:39:17,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2021-02-21 20:39:17,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-02-21 20:39:17,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-02-21 20:39:17,392 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 29 [2021-02-21 20:39:17,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:39:17,393 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-02-21 20:39:17,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 20:39:17,393 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-02-21 20:39:17,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-21 20:39:17,395 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:39:17,395 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:39:17,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 20:39:17,396 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:39:17,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:39:17,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1911061662, now seen corresponding path program 1 times [2021-02-21 20:39:17,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:39:17,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1980969762] [2021-02-21 20:39:17,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:39:17,401 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:39:17,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:39:17,451 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:17,452 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:39:17,453 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:17,454 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-21 20:39:17,464 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:17,465 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:39:17,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:39:17,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:39:17,520 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:17,521 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:39:17,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:39:17,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1980969762] [2021-02-21 20:39:17,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:39:17,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 20:39:17,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560342278] [2021-02-21 20:39:17,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 20:39:17,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:39:17,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 20:39:17,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 20:39:17,529 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 4 states. [2021-02-21 20:39:17,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:39:17,648 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2021-02-21 20:39:17,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 20:39:17,649 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2021-02-21 20:39:17,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:39:17,650 INFO L225 Difference]: With dead ends: 42 [2021-02-21 20:39:17,651 INFO L226 Difference]: Without dead ends: 37 [2021-02-21 20:39:17,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 20:39:17,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-02-21 20:39:17,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-02-21 20:39:17,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-02-21 20:39:17,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-02-21 20:39:17,662 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 29 [2021-02-21 20:39:17,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:39:17,663 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-02-21 20:39:17,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 20:39:17,663 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-02-21 20:39:17,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-21 20:39:17,664 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:39:17,665 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:39:17,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 20:39:17,665 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:39:17,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:39:17,681 INFO L82 PathProgramCache]: Analyzing trace with hash -2041206465, now seen corresponding path program 1 times [2021-02-21 20:39:17,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:39:17,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545047351] [2021-02-21 20:39:17,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:39:17,688 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:39:17,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:39:17,792 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:17,795 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:39:17,796 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:17,797 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:39:17,802 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:17,803 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 20:39:17,817 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:17,821 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-21 20:39:17,836 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:17,841 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-21 20:39:17,857 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:17,861 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 20:39:17,873 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:17,874 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-21 20:39:17,882 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:17,883 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:39:17,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:39:17,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:39:17,957 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:17,961 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:39:17,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:39:17,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545047351] [2021-02-21 20:39:17,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:39:17,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-21 20:39:17,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293247662] [2021-02-21 20:39:17,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-21 20:39:17,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:39:17,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-21 20:39:17,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-21 20:39:17,973 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 9 states. [2021-02-21 20:39:18,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:39:18,226 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-02-21 20:39:18,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-21 20:39:18,227 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2021-02-21 20:39:18,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:39:18,228 INFO L225 Difference]: With dead ends: 46 [2021-02-21 20:39:18,228 INFO L226 Difference]: Without dead ends: 32 [2021-02-21 20:39:18,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-02-21 20:39:18,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-02-21 20:39:18,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-02-21 20:39:18,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-02-21 20:39:18,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 31 transitions. [2021-02-21 20:39:18,237 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 31 transitions. Word has length 31 [2021-02-21 20:39:18,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:39:18,237 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 31 transitions. [2021-02-21 20:39:18,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-21 20:39:18,237 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 31 transitions. [2021-02-21 20:39:18,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-21 20:39:18,238 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:39:18,239 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:39:18,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 20:39:18,239 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:39:18,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:39:18,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1860060673, now seen corresponding path program 1 times [2021-02-21 20:39:18,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:39:18,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385990571] [2021-02-21 20:39:18,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:39:18,243 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:39:18,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:39:18,277 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:18,278 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:39:18,279 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:18,280 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:39:18,288 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:18,289 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:39:18,299 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:18,300 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-21 20:39:18,312 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:18,313 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:39:18,322 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:18,322 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:39:18,331 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:18,332 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-21 20:39:18,343 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:18,344 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:39:18,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:39:18,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:39:18,388 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:18,389 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:39:18,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:39:18,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385990571] [2021-02-21 20:39:18,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:39:18,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-21 20:39:18,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182477850] [2021-02-21 20:39:18,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-21 20:39:18,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:39:18,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-21 20:39:18,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-21 20:39:18,394 INFO L87 Difference]: Start difference. First operand 32 states and 31 transitions. Second operand 9 states. [2021-02-21 20:39:18,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:39:18,528 INFO L93 Difference]: Finished difference Result 32 states and 31 transitions. [2021-02-21 20:39:18,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-21 20:39:18,528 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2021-02-21 20:39:18,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:39:18,529 INFO L225 Difference]: With dead ends: 32 [2021-02-21 20:39:18,529 INFO L226 Difference]: Without dead ends: 0 [2021-02-21 20:39:18,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-02-21 20:39:18,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-21 20:39:18,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-21 20:39:18,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-21 20:39:18,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-21 20:39:18,532 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2021-02-21 20:39:18,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:39:18,532 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-21 20:39:18,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-21 20:39:18,532 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-21 20:39:18,532 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-21 20:39:18,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 20:39:18,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-21 20:39:18,919 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-21 20:39:18,920 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-21 20:39:18,920 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-21 20:39:18,920 INFO L192 CegarLoopUtils]: At program point L3-2(line 3) the Hoare annotation is: true [2021-02-21 20:39:18,920 INFO L192 CegarLoopUtils]: At program point L3-3(line 3) the Hoare annotation is: true [2021-02-21 20:39:18,921 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-21 20:39:18,921 INFO L192 CegarLoopUtils]: At program point L3-4(line 3) the Hoare annotation is: true [2021-02-21 20:39:18,921 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-21 20:39:18,921 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 3) the Hoare annotation is: true [2021-02-21 20:39:18,921 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-21 20:39:18,922 INFO L192 CegarLoopUtils]: At program point L3(line 3) the Hoare annotation is: true [2021-02-21 20:39:18,922 INFO L192 CegarLoopUtils]: At program point L3-1(line 3) the Hoare annotation is: true [2021-02-21 20:39:18,922 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-21 20:39:18,922 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-21 20:39:18,922 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-21 20:39:18,923 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-21 20:39:18,923 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-21 20:39:18,923 INFO L192 CegarLoopUtils]: At program point L27(line 27) the Hoare annotation is: true [2021-02-21 20:39:18,923 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 13 31) the Hoare annotation is: true [2021-02-21 20:39:18,923 INFO L185 CegarLoopUtils]: At program point L23(line 23) the Hoare annotation is: (let ((.cse0 (= (select |#valid| |main_~#d1~0.base|) 1)) (.cse1 (not (= |main_~#d1~0.base| |main_~#d2~0.base|)))) (or (and .cse0 .cse1 (= |main_~#d1~0.base| main_~pd~0.base) (not |main_#t~short10|)) (and .cse0 (= |main_~#d2~0.offset| main_~pd~0.offset) (= main_~pd~0.base |main_~#d2~0.base|) (= (select (select |#memory_int| |main_~#d2~0.base|) |main_~#d2~0.offset|) 0) .cse1))) [2021-02-21 20:39:18,924 INFO L185 CegarLoopUtils]: At program point L23-1(line 23) the Hoare annotation is: (and (= (select |#valid| |main_~#d1~0.base|) 1) (= |main_~#d2~0.offset| main_~pd~0.offset) (= main_~pd~0.base |main_~#d2~0.base|) (= (select (select |#memory_int| |main_~#d2~0.base|) |main_~#d2~0.offset|) 0) (not (= |main_~#d1~0.base| |main_~#d2~0.base|))) [2021-02-21 20:39:18,924 INFO L185 CegarLoopUtils]: At program point L23-2(line 23) the Hoare annotation is: (and (= (select |#valid| |main_~#d1~0.base|) 1) (= |main_#t~mem9| 0) (= |main_~#d2~0.offset| main_~pd~0.offset) (= main_~pd~0.base |main_~#d2~0.base|) (= (select (select |#memory_int| |main_~#d2~0.base|) |main_~#d2~0.offset|) 0) (not (= |main_~#d1~0.base| |main_~#d2~0.base|))) [2021-02-21 20:39:18,924 INFO L185 CegarLoopUtils]: At program point L19(line 19) the Hoare annotation is: (and (= (select |#valid| |main_~#d1~0.base|) 1) (= |main_~#d1~0.offset| main_~pd~0.offset) (not (= |main_~#d1~0.base| |main_~#d2~0.base|)) (= |main_~#d1~0.base| main_~pd~0.base)) [2021-02-21 20:39:18,924 INFO L185 CegarLoopUtils]: At program point L23-4(lines 23 25) the Hoare annotation is: (not |main_#t~short10|) [2021-02-21 20:39:18,925 INFO L185 CegarLoopUtils]: At program point L23-5(line 23) the Hoare annotation is: false [2021-02-21 20:39:18,925 INFO L185 CegarLoopUtils]: At program point L23-6(line 23) the Hoare annotation is: false [2021-02-21 20:39:18,925 INFO L192 CegarLoopUtils]: At program point L23-7(line 23) the Hoare annotation is: true [2021-02-21 20:39:18,925 INFO L185 CegarLoopUtils]: At program point L15(line 15) the Hoare annotation is: (= (select |#valid| |main_~#d1~0.base|) 1) [2021-02-21 20:39:18,925 INFO L192 CegarLoopUtils]: At program point L23-8(line 23) the Hoare annotation is: true [2021-02-21 20:39:18,926 INFO L185 CegarLoopUtils]: At program point L15-1(line 15) the Hoare annotation is: (and (= (select |#valid| |main_~#d1~0.base|) 1) (not (= |main_~#d1~0.base| |main_~#d2~0.base|))) [2021-02-21 20:39:18,926 INFO L192 CegarLoopUtils]: At program point L15-2(line 15) the Hoare annotation is: true [2021-02-21 20:39:18,926 INFO L192 CegarLoopUtils]: At program point L15-3(line 15) the Hoare annotation is: true [2021-02-21 20:39:18,926 INFO L192 CegarLoopUtils]: At program point L15-4(line 15) the Hoare annotation is: true [2021-02-21 20:39:18,926 INFO L192 CegarLoopUtils]: At program point L15-5(line 15) the Hoare annotation is: true [2021-02-21 20:39:18,926 INFO L185 CegarLoopUtils]: At program point L15-6(line 15) the Hoare annotation is: false [2021-02-21 20:39:18,927 INFO L185 CegarLoopUtils]: At program point L15-7(line 15) the Hoare annotation is: false [2021-02-21 20:39:18,927 INFO L185 CegarLoopUtils]: At program point L15-8(line 15) the Hoare annotation is: false [2021-02-21 20:39:18,927 INFO L185 CegarLoopUtils]: At program point L15-9(line 15) the Hoare annotation is: false [2021-02-21 20:39:18,927 INFO L185 CegarLoopUtils]: At program point L24(lines 14 31) the Hoare annotation is: false [2021-02-21 20:39:18,927 INFO L185 CegarLoopUtils]: At program point L16(line 16) the Hoare annotation is: (and (= (select |#valid| |main_~#d1~0.base|) 1) (not (= |main_~#d1~0.base| |main_~#d2~0.base|))) [2021-02-21 20:39:18,928 INFO L185 CegarLoopUtils]: At program point L16-1(line 16) the Hoare annotation is: (and (= (select |#valid| |main_~#d1~0.base|) 1) (not (= |main_~#d1~0.base| |main_~#d2~0.base|))) [2021-02-21 20:39:18,928 INFO L185 CegarLoopUtils]: At program point L29(line 29) the Hoare annotation is: false [2021-02-21 20:39:18,928 INFO L185 CegarLoopUtils]: At program point L21(line 21) the Hoare annotation is: (and (= (select |#valid| |main_~#d1~0.base|) 1) (= |main_~#d2~0.offset| main_~pd~0.offset) (= main_~pd~0.base |main_~#d2~0.base|) (not (= |main_~#d1~0.base| |main_~#d2~0.base|))) [2021-02-21 20:39:18,928 INFO L185 CegarLoopUtils]: At program point L21-1(lines 18 22) the Hoare annotation is: (let ((.cse0 (= (select |#valid| |main_~#d1~0.base|) 1)) (.cse1 (not (= |main_~#d1~0.base| |main_~#d2~0.base|)))) (or (and .cse0 (= |main_~#d2~0.offset| main_~pd~0.offset) (= main_~pd~0.base |main_~#d2~0.base|) (= (select (select |#memory_int| |main_~#d2~0.base|) |main_~#d2~0.offset|) 0) .cse1) (and .cse0 .cse1 (= |main_~#d1~0.base| main_~pd~0.base)))) [2021-02-21 20:39:18,929 INFO L185 CegarLoopUtils]: At program point L17(line 17) the Hoare annotation is: (and (= (select |#valid| |main_~#d1~0.base|) 1) (not (= |main_~#d1~0.base| |main_~#d2~0.base|))) [2021-02-21 20:39:18,929 INFO L185 CegarLoopUtils]: At program point L17-1(line 17) the Hoare annotation is: (and (= (select |#valid| |main_~#d1~0.base|) 1) (not (= |main_~#d1~0.base| |main_~#d2~0.base|))) [2021-02-21 20:39:18,929 INFO L185 CegarLoopUtils]: At program point L17-3(line 17) the Hoare annotation is: (and (= (select |#valid| |main_~#d1~0.base|) 1) (not (= |main_~#d1~0.base| |main_~#d2~0.base|))) [2021-02-21 20:39:18,929 INFO L185 CegarLoopUtils]: At program point L17-4(line 17) the Hoare annotation is: (let ((.cse0 (= (select |#valid| |main_~#d1~0.base|) 1)) (.cse1 (not (= |main_~#d1~0.base| |main_~#d2~0.base|)))) (or (and .cse0 (= |main_#t~ite8.base| |main_~#d2~0.base|) (= |main_~#d2~0.offset| |main_#t~ite8.offset|) .cse1) (and (= |main_~#d1~0.offset| |main_#t~ite8.offset|) .cse0 (= |main_~#d1~0.base| |main_#t~ite8.base|) .cse1))) [2021-02-21 20:39:18,929 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 13 31) the Hoare annotation is: true [2021-02-21 20:39:18,930 INFO L185 CegarLoopUtils]: At program point L17-5(line 17) the Hoare annotation is: (let ((.cse0 (= (select |#valid| |main_~#d1~0.base|) 1)) (.cse1 (not (= |main_~#d1~0.base| |main_~#d2~0.base|)))) (or (and .cse0 (= |main_~#d2~0.offset| main_~pd~0.offset) (= main_~pd~0.base |main_~#d2~0.base|) (= |main_#t~ite8.base| |main_~#d2~0.base|) (= |main_~#d2~0.offset| |main_#t~ite8.offset|) .cse1) (and (= |main_~#d1~0.offset| |main_#t~ite8.offset|) .cse0 (= |main_~#d1~0.offset| main_~pd~0.offset) (= |main_~#d1~0.base| |main_#t~ite8.base|) .cse1 (= |main_~#d1~0.base| main_~pd~0.base)))) [2021-02-21 20:39:18,930 INFO L185 CegarLoopUtils]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 29) the Hoare annotation is: false [2021-02-21 20:39:18,930 INFO L185 CegarLoopUtils]: At program point L30(line 30) the Hoare annotation is: false [2021-02-21 20:39:18,930 INFO L185 CegarLoopUtils]: At program point mainENTRY(lines 13 31) the Hoare annotation is: (and (= |old(#length)| |#length|) (= |old(#valid)| |#valid|)) [2021-02-21 20:39:18,931 INFO L185 CegarLoopUtils]: At program point L18(lines 18 22) the Hoare annotation is: (let ((.cse0 (= (select |#valid| |main_~#d1~0.base|) 1)) (.cse1 (not (= |main_~#d1~0.base| |main_~#d2~0.base|)))) (or (and .cse0 (= |main_~#d1~0.offset| main_~pd~0.offset) .cse1 (= |main_~#d1~0.base| main_~pd~0.base)) (and .cse0 (= |main_~#d2~0.offset| main_~pd~0.offset) (= main_~pd~0.base |main_~#d2~0.base|) .cse1))) [2021-02-21 20:39:18,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 08:39:18 BoogieIcfgContainer [2021-02-21 20:39:18,943 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 20:39:18,945 INFO L168 Benchmark]: Toolchain (without parser) took 3598.25 ms. Allocated memory was 154.1 MB in the beginning and 196.1 MB in the end (delta: 41.9 MB). Free memory was 131.3 MB in the beginning and 140.4 MB in the end (delta: -9.2 MB). Peak memory consumption was 82.2 MB. Max. memory is 8.0 GB. [2021-02-21 20:39:18,946 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 154.1 MB. Free memory is still 130.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 20:39:18,947 INFO L168 Benchmark]: CACSL2BoogieTranslator took 309.74 ms. Allocated memory is still 154.1 MB. Free memory was 130.2 MB in the beginning and 120.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-21 20:39:18,947 INFO L168 Benchmark]: Boogie Preprocessor took 69.77 ms. Allocated memory is still 154.1 MB. Free memory was 120.8 MB in the beginning and 119.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-21 20:39:18,948 INFO L168 Benchmark]: RCFGBuilder took 520.79 ms. Allocated memory is still 154.1 MB. Free memory was 119.2 MB in the beginning and 103.0 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-02-21 20:39:18,949 INFO L168 Benchmark]: TraceAbstraction took 2671.68 ms. Allocated memory was 154.1 MB in the beginning and 196.1 MB in the end (delta: 41.9 MB). Free memory was 102.6 MB in the beginning and 140.4 MB in the end (delta: -37.8 MB). Peak memory consumption was 53.9 MB. Max. memory is 8.0 GB. [2021-02-21 20:39:18,952 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 154.1 MB. Free memory is still 130.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 309.74 ms. Allocated memory is still 154.1 MB. Free memory was 130.2 MB in the beginning and 120.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 69.77 ms. Allocated memory is still 154.1 MB. Free memory was 120.8 MB in the beginning and 119.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 520.79 ms. Allocated memory is still 154.1 MB. Free memory was 119.2 MB in the beginning and 103.0 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2671.68 ms. Allocated memory was 154.1 MB in the beginning and 196.1 MB in the end (delta: 41.9 MB). Free memory was 102.6 MB in the beginning and 140.4 MB in the end (delta: -37.8 MB). Peak memory consumption was 53.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 29]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 0 - ProcedureContractResult [Line: 13]: Procedure Contract for main Derived contract for procedure main: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 54 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.0s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 121 SDtfs, 79 SDslu, 293 SDs, 0 SdLazy, 248 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 9 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 51 LocationsWithAnnotation, 51 PreInvPairs, 79 NumberOfFragments, 405 HoareAnnotationTreeSize, 51 FomulaSimplifications, 29 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 51 FomulaSimplificationsInter, 24 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...