/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/ldv-regression/test13.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 23:05:10,809 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 23:05:10,812 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 23:05:10,848 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 23:05:10,927 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 23:05:10,928 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 23:05:10,929 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 23:05:10,935 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 23:05:10,960 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 23:05:10,960 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 23:05:10,965 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 23:05:10,966 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 23:05:10,966 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 23:05:10,966 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 23:05:10,966 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 23:05:10,966 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 23:05:10,966 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 23:05:10,967 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 23:05:10,968 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 23:05:10,968 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 23:05:10,968 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 23:05:10,969 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 23:05:10,969 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 23:05:10,969 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 23:05:10,969 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 23:05:10,969 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 23:05:10,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 23:05:10,970 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 23:05:10,970 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 23:05:10,970 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 23:05:10,970 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-23 23:05:11,388 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 23:05:11,419 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 23:05:11,422 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 23:05:11,424 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 23:05:11,425 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 23:05:11,426 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test13.c [2021-02-23 23:05:11,515 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4fd7de53/71c7993dc9d84d1482aa8c09cb3cb5d7/FLAGcc0ac2e75 [2021-02-23 23:05:12,179 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 23:05:12,179 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test13.c [2021-02-23 23:05:12,187 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4fd7de53/71c7993dc9d84d1482aa8c09cb3cb5d7/FLAGcc0ac2e75 [2021-02-23 23:05:12,535 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4fd7de53/71c7993dc9d84d1482aa8c09cb3cb5d7 [2021-02-23 23:05:12,539 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 23:05:12,553 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 23:05:12,554 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 23:05:12,555 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 23:05:12,560 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 23:05:12,561 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:05:12" (1/1) ... [2021-02-23 23:05:12,563 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e908ede and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:12, skipping insertion in model container [2021-02-23 23:05:12,563 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:05:12" (1/1) ... [2021-02-23 23:05:12,573 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 23:05:12,591 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 23:05:12,732 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/test13.c[377,390] [2021-02-23 23:05:12,740 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 23:05:12,757 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 23:05:12,769 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/test13.c[377,390] [2021-02-23 23:05:12,771 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 23:05:12,789 INFO L208 MainTranslator]: Completed translation [2021-02-23 23:05:12,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:12 WrapperNode [2021-02-23 23:05:12,789 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 23:05:12,791 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 23:05:12,791 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 23:05:12,791 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 23:05:12,806 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:12" (1/1) ... [2021-02-23 23:05:12,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:12" (1/1) ... [2021-02-23 23:05:12,815 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:12" (1/1) ... [2021-02-23 23:05:12,816 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:12" (1/1) ... [2021-02-23 23:05:12,822 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:12" (1/1) ... [2021-02-23 23:05:12,825 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:12" (1/1) ... [2021-02-23 23:05:12,826 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:12" (1/1) ... [2021-02-23 23:05:12,829 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 23:05:12,830 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 23:05:12,830 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 23:05:12,830 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 23:05:12,831 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:12" (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 [2021-02-23 23:05:12,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 23:05:12,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 23:05:12,966 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 23:05:12,966 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2021-02-23 23:05:12,967 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 23:05:12,967 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 23:05:12,968 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 23:05:12,968 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 23:05:12,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 23:05:12,968 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-02-23 23:05:12,969 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 23:05:12,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 23:05:12,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 23:05:12,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 23:05:12,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 23:05:12,971 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 23:05:12,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 23:05:13,313 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 23:05:13,314 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-23 23:05:13,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:05:13 BoogieIcfgContainer [2021-02-23 23:05:13,316 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 23:05:13,318 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 23:05:13,318 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 23:05:13,322 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 23:05:13,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 11:05:12" (1/3) ... [2021-02-23 23:05:13,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cd03e2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:05:13, skipping insertion in model container [2021-02-23 23:05:13,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:12" (2/3) ... [2021-02-23 23:05:13,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cd03e2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:05:13, skipping insertion in model container [2021-02-23 23:05:13,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:05:13" (3/3) ... [2021-02-23 23:05:13,327 INFO L111 eAbstractionObserver]: Analyzing ICFG test13.c [2021-02-23 23:05:13,336 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 23:05:13,342 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 23:05:13,367 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 23:05:13,502 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 23:05:13,503 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 23:05:13,503 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-23 23:05:13,503 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 23:05:13,503 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 23:05:13,503 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 23:05:13,503 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 23:05:13,504 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 23:05:13,527 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2021-02-23 23:05:13,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-23 23:05:13,538 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:05:13,539 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:05:13,540 INFO L428 AbstractCegarLoop]: === Iteration 1 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:05:13,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:05:13,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1258297951, now seen corresponding path program 1 times [2021-02-23 23:05:13,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:05:13,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15967157] [2021-02-23 23:05:13,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:05:13,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:05:13,886 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:13,889 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:05:13,931 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:13,932 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:05:13,944 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:13,945 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:05:13,958 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:13,960 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:05:13,973 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:13,974 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:14,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:05:14,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:05:14,097 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:14,098 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:14,099 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:14,100 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:05:14,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:05:14,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15967157] [2021-02-23 23:05:14,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:05:14,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-23 23:05:14,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113972420] [2021-02-23 23:05:14,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-23 23:05:14,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:05:14,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-23 23:05:14,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-23 23:05:14,154 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 7 states. [2021-02-23 23:05:14,498 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-02-23 23:05:14,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:05:14,809 INFO L93 Difference]: Finished difference Result 39 states and 38 transitions. [2021-02-23 23:05:14,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 23:05:14,811 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2021-02-23 23:05:14,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:05:14,819 INFO L225 Difference]: With dead ends: 39 [2021-02-23 23:05:14,820 INFO L226 Difference]: Without dead ends: 0 [2021-02-23 23:05:14,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-02-23 23:05:14,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-23 23:05:14,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-23 23:05:14,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-23 23:05:14,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-23 23:05:14,854 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2021-02-23 23:05:14,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:05:14,855 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-23 23:05:14,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-23 23:05:14,855 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-23 23:05:14,855 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-23 23:05:14,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 23:05:14,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-23 23:05:15,532 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-23 23:05:15,532 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-23 23:05:15,532 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-23 23:05:15,533 INFO L192 CegarLoopUtils]: At program point L3-2(line 3) the Hoare annotation is: true [2021-02-23 23:05:15,533 INFO L192 CegarLoopUtils]: At program point L3-3(line 3) the Hoare annotation is: true [2021-02-23 23:05:15,533 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 23:05:15,533 INFO L192 CegarLoopUtils]: At program point L3-4(line 3) the Hoare annotation is: true [2021-02-23 23:05:15,533 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-23 23:05:15,533 INFO L192 CegarLoopUtils]: At program point L3-5(line 3) the Hoare annotation is: true [2021-02-23 23:05:15,533 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: (and (= ~pa~0.base |~#a~0.base|) (= ~pa~0.offset |~#a~0.offset|)) [2021-02-23 23:05:15,534 INFO L185 CegarLoopUtils]: At program point L17(line 17) the Hoare annotation is: (and (= ~pa~0.base |~#a~0.base|) (= ~pa~0.offset |~#a~0.offset|)) [2021-02-23 23:05:15,534 INFO L192 CegarLoopUtils]: At program point L16(line 16) the Hoare annotation is: true [2021-02-23 23:05:15,534 INFO L192 CegarLoopUtils]: At program point L16-1(line 16) the Hoare annotation is: true [2021-02-23 23:05:15,534 INFO L192 CegarLoopUtils]: At program point L16-2(line 16) the Hoare annotation is: true [2021-02-23 23:05:15,534 INFO L192 CegarLoopUtils]: At program point L16-3(line 16) the Hoare annotation is: true [2021-02-23 23:05:15,535 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.offset| |old(#t~string5.offset)|) (= ~pa~0.base |old(~pa~0.base)|) (= ~pa~0.offset |old(~pa~0.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |~#a~0.offset| |old(~#a~0.offset)|) (= |~#b~0.base| |old(~#b~0.base)|) (= |~#a~0.base| |old(~#a~0.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |old(#valid)| |#valid|) (= |#t~string5.base| |old(#t~string5.base)|) (= ~pb~0.base |old(~pb~0.base)|) (= |~#b~0.offset| |old(~#b~0.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= ~pb~0.offset |old(~pb~0.offset)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2021-02-23 23:05:15,535 INFO L192 CegarLoopUtils]: At program point L3(line 3) the Hoare annotation is: true [2021-02-23 23:05:15,535 INFO L192 CegarLoopUtils]: At program point L3-1(line 3) the Hoare annotation is: true [2021-02-23 23:05:15,535 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: (and (= ~pa~0.base |~#a~0.base|) (= ~pa~0.offset |~#a~0.offset|)) [2021-02-23 23:05:15,536 INFO L185 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: (and (= ~pa~0.base |~#a~0.base|) (= ~pa~0.offset |~#a~0.offset|)) [2021-02-23 23:05:15,536 INFO L185 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (and (= ~pa~0.base |~#a~0.base|) (= ~pa~0.offset |~#a~0.offset|)) [2021-02-23 23:05:15,536 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-23 23:05:15,536 INFO L185 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: (and (= ~pa~0.base |~#a~0.base|) (= ~pa~0.offset |~#a~0.offset|)) [2021-02-23 23:05:15,536 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 19 22) the Hoare annotation is: true [2021-02-23 23:05:15,537 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 19 22) the Hoare annotation is: true [2021-02-23 23:05:15,537 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 19 22) the Hoare annotation is: true [2021-02-23 23:05:15,537 INFO L192 CegarLoopUtils]: At program point L20(line 20) the Hoare annotation is: true [2021-02-23 23:05:15,537 INFO L192 CegarLoopUtils]: At program point checkENTRY(lines 6 14) the Hoare annotation is: true [2021-02-23 23:05:15,537 INFO L185 CegarLoopUtils]: At program point L12(line 12) the Hoare annotation is: (or (not (= |~#a~0.offset| ~pa~0.offset)) (not (= |~#a~0.base| ~pa~0.base)) (not (= |check_#in~b.offset| |check_#in~a.offset|)) (not (= |check_#in~a.base| |check_#in~b.base|))) [2021-02-23 23:05:15,538 INFO L185 CegarLoopUtils]: At program point L8(lines 6 14) the Hoare annotation is: (or (not (= |~#a~0.offset| ~pa~0.offset)) (not (= |~#a~0.base| ~pa~0.base)) (not (= |check_#in~b.offset| |check_#in~a.offset|)) (not (= |check_#in~a.base| |check_#in~b.base|))) [2021-02-23 23:05:15,538 INFO L185 CegarLoopUtils]: At program point checkErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) the Hoare annotation is: (or (not (= |~#a~0.offset| ~pa~0.offset)) (not (= |~#a~0.base| ~pa~0.base)) (not (= |check_#in~b.offset| |check_#in~a.offset|)) (not (= |check_#in~a.base| |check_#in~b.base|))) [2021-02-23 23:05:15,538 INFO L185 CegarLoopUtils]: At program point L7(lines 7 9) the Hoare annotation is: (or (not (= ~pa~0.base |~#a~0.base|)) (and (= check_~a.base check_~b.base) (= check_~a.base |check_#in~b.base|) (= |check_#in~b.offset| check_~a.offset) (= check_~a.offset check_~b.offset)) (not (= |check_#in~b.offset| |check_#in~a.offset|)) (not (= ~pa~0.offset |~#a~0.offset|)) (not (= |check_#in~a.base| |check_#in~b.base|))) [2021-02-23 23:05:15,539 INFO L185 CegarLoopUtils]: At program point checkFINAL(lines 6 14) the Hoare annotation is: (or (not (= ~pa~0.base |~#a~0.base|)) (and (= check_~a.base check_~b.base) (= check_~a.base |check_#in~b.base|) (= |check_#in~b.offset| check_~a.offset) (= check_~a.offset check_~b.offset)) (not (= |check_#in~b.offset| |check_#in~a.offset|)) (not (= ~pa~0.offset |~#a~0.offset|)) (not (= |check_#in~a.base| |check_#in~b.base|))) [2021-02-23 23:05:15,539 INFO L185 CegarLoopUtils]: At program point L6(lines 6 14) the Hoare annotation is: (or (and (= check_~a.base |check_#in~b.base|) (= |check_#in~b.offset| check_~a.offset)) (not (= ~pa~0.base |~#a~0.base|)) (not (= |check_#in~b.offset| |check_#in~a.offset|)) (not (= ~pa~0.offset |~#a~0.offset|)) (not (= |check_#in~a.base| |check_#in~b.base|))) [2021-02-23 23:05:15,539 INFO L185 CegarLoopUtils]: At program point checkEXIT(lines 6 14) the Hoare annotation is: (or (not (= ~pa~0.base |~#a~0.base|)) (and (= check_~a.base check_~b.base) (= check_~a.base |check_#in~b.base|) (= |check_#in~b.offset| check_~a.offset) (= check_~a.offset check_~b.offset)) (not (= |check_#in~b.offset| |check_#in~a.offset|)) (not (= ~pa~0.offset |~#a~0.offset|)) (not (= |check_#in~a.base| |check_#in~b.base|))) [2021-02-23 23:05:15,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 11:05:15 BoogieIcfgContainer [2021-02-23 23:05:15,562 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 23:05:15,564 INFO L168 Benchmark]: Toolchain (without parser) took 3022.30 ms. Allocated memory was 151.0 MB in the beginning and 204.5 MB in the end (delta: 53.5 MB). Free memory was 128.1 MB in the beginning and 163.5 MB in the end (delta: -35.3 MB). Peak memory consumption was 103.5 MB. Max. memory is 8.0 GB. [2021-02-23 23:05:15,565 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 151.0 MB. Free memory is still 124.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 23:05:15,566 INFO L168 Benchmark]: CACSL2BoogieTranslator took 235.45 ms. Allocated memory is still 151.0 MB. Free memory was 127.0 MB in the beginning and 117.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 23:05:15,567 INFO L168 Benchmark]: Boogie Preprocessor took 38.26 ms. Allocated memory is still 151.0 MB. Free memory was 117.9 MB in the beginning and 116.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 23:05:15,568 INFO L168 Benchmark]: RCFGBuilder took 486.01 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 102.1 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-02-23 23:05:15,569 INFO L168 Benchmark]: TraceAbstraction took 2243.97 ms. Allocated memory was 151.0 MB in the beginning and 204.5 MB in the end (delta: 53.5 MB). Free memory was 101.7 MB in the beginning and 163.5 MB in the end (delta: -61.8 MB). Peak memory consumption was 76.2 MB. Max. memory is 8.0 GB. [2021-02-23 23:05:15,573 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 151.0 MB. Free memory is still 124.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 235.45 ms. Allocated memory is still 151.0 MB. Free memory was 127.0 MB in the beginning and 117.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.26 ms. Allocated memory is still 151.0 MB. Free memory was 117.9 MB in the beginning and 116.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 486.01 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 102.1 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2243.97 ms. Allocated memory was 151.0 MB in the beginning and 204.5 MB in the end (delta: 53.5 MB). Free memory was 101.7 MB in the beginning and 163.5 MB in the end (delta: -61.8 MB). Peak memory consumption was 76.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: 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: 6]: Loop Invariant Derived loop invariant: ((!(a == pa) || !(a == pa)) || !(b == a)) || !(a == b) - ProcedureContractResult [Line: 19]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 6]: Procedure Contract for check Derived contract for procedure check: (((!(pa == a) || (((a == b && a == b) && b == a) && a == b)) || !(b == a)) || !(pa == a)) || !(a == b) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.3s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 23 SDtfs, 22 SDslu, 72 SDs, 0 SdLazy, 36 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 32 LocationsWithAnnotation, 32 PreInvPairs, 39 NumberOfFragments, 280 HoareAnnotationTreeSize, 32 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 32 FomulaSimplificationsInter, 623 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 23 NumberOfCodeBlocks, 23 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 22 ConstructedInterpolants, 0 QuantifiedInterpolants, 2728 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, 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...