/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/test06.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 01:04:29,355 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 01:04:29,360 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 01:04:29,402 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-24 01:04:29,416 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 01:04:29,418 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 01:04:29,419 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 01:04:29,421 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 01:04:29,422 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 01:04:29,432 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 01:04:29,434 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 01:04:29,440 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 01:04:29,442 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 01:04:29,448 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 01:04:29,449 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 01:04:29,451 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 01:04:29,454 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-24 01:04:29,465 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 01:04:29,466 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 01:04:29,467 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 01:04:29,472 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-24 01:04:29,495 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 01:04:29,496 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 01:04:29,498 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 01:04:29,499 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 01:04:29,501 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 01:04:29,501 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 01:04:29,501 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 01:04:29,501 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 01:04:29,501 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 01:04:29,501 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 01:04:29,503 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 01:04:29,503 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 01:04:29,503 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 01:04:29,503 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 01:04:29,503 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 01:04:29,504 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 01:04:29,504 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 01:04:29,504 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 01:04:29,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 01:04:29,504 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 01:04:29,505 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 01:04:29,505 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 01:04:29,505 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 01:04:29,966 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 01:04:30,021 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 01:04:30,025 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 01:04:30,028 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 01:04:30,029 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 01:04:30,030 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test06.c [2020-10-24 01:04:30,132 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5d99c5a1/5781bafda0fd4cfb88a1e929f9880597/FLAG0818c640e [2020-10-24 01:04:30,811 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 01:04:30,812 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test06.c [2020-10-24 01:04:30,819 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5d99c5a1/5781bafda0fd4cfb88a1e929f9880597/FLAG0818c640e [2020-10-24 01:04:31,202 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5d99c5a1/5781bafda0fd4cfb88a1e929f9880597 [2020-10-24 01:04:31,206 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 01:04:31,216 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 01:04:31,222 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 01:04:31,222 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 01:04:31,227 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 01:04:31,228 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 01:04:31" (1/1) ... [2020-10-24 01:04:31,239 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@96723c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:04:31, skipping insertion in model container [2020-10-24 01:04:31,239 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 01:04:31" (1/1) ... [2020-10-24 01:04:31,251 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 01:04:31,272 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 01:04:31,520 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 01:04:31,533 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 01:04:31,554 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 01:04:31,572 INFO L208 MainTranslator]: Completed translation [2020-10-24 01:04:31,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:04:31 WrapperNode [2020-10-24 01:04:31,573 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 01:04:31,574 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 01:04:31,575 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 01:04:31,575 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 01:04:31,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:04:31" (1/1) ... [2020-10-24 01:04:31,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:04:31" (1/1) ... [2020-10-24 01:04:31,598 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:04:31" (1/1) ... [2020-10-24 01:04:31,599 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:04:31" (1/1) ... [2020-10-24 01:04:31,608 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:04:31" (1/1) ... [2020-10-24 01:04:31,611 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:04:31" (1/1) ... [2020-10-24 01:04:31,613 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:04:31" (1/1) ... [2020-10-24 01:04:31,616 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 01:04:31,617 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 01:04:31,617 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 01:04:31,617 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 01:04:31,618 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:04:31" (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 [2020-10-24 01:04:31,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 01:04:31,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 01:04:31,710 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 01:04:31,710 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2020-10-24 01:04:31,710 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-10-24 01:04:31,711 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 01:04:31,711 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 01:04:31,711 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 01:04:31,711 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 01:04:31,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 01:04:31,712 INFO L130 BoogieDeclarations]: Found specification of procedure g [2020-10-24 01:04:31,712 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-24 01:04:31,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-24 01:04:31,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 01:04:31,712 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-10-24 01:04:31,713 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 01:04:31,713 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 01:04:31,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 01:04:31,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 01:04:31,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 01:04:31,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 01:04:32,260 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 01:04:32,261 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-24 01:04:32,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 01:04:32 BoogieIcfgContainer [2020-10-24 01:04:32,263 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 01:04:32,265 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 01:04:32,265 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 01:04:32,269 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 01:04:32,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 01:04:31" (1/3) ... [2020-10-24 01:04:32,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11d58905 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 01:04:32, skipping insertion in model container [2020-10-24 01:04:32,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:04:31" (2/3) ... [2020-10-24 01:04:32,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11d58905 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 01:04:32, skipping insertion in model container [2020-10-24 01:04:32,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 01:04:32" (3/3) ... [2020-10-24 01:04:32,272 INFO L111 eAbstractionObserver]: Analyzing ICFG test06.c [2020-10-24 01:04:32,286 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 01:04:32,292 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 01:04:32,306 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 01:04:32,345 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 01:04:32,345 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 01:04:32,346 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 01:04:32,346 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 01:04:32,346 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 01:04:32,346 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 01:04:32,347 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 01:04:32,347 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 01:04:32,375 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2020-10-24 01:04:32,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-24 01:04:32,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:04:32,390 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:04:32,391 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:04:32,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:04:32,403 INFO L82 PathProgramCache]: Analyzing trace with hash 690686334, now seen corresponding path program 1 times [2020-10-24 01:04:32,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:04:32,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180115284] [2020-10-24 01:04:32,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:04:32,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:04:33,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:04:33,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:04:33,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-24 01:04:33,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:04:33,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:04:33,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180115284] [2020-10-24 01:04:33,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:04:33,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-24 01:04:33,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682078495] [2020-10-24 01:04:33,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-24 01:04:33,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:04:33,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-24 01:04:33,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-24 01:04:33,236 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 11 states. [2020-10-24 01:04:33,992 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-10-24 01:04:34,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:04:34,539 INFO L93 Difference]: Finished difference Result 115 states and 117 transitions. [2020-10-24 01:04:34,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-24 01:04:34,541 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-10-24 01:04:34,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:04:34,550 INFO L225 Difference]: With dead ends: 115 [2020-10-24 01:04:34,550 INFO L226 Difference]: Without dead ends: 58 [2020-10-24 01:04:34,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-10-24 01:04:34,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-24 01:04:34,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-24 01:04:34,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-24 01:04:34,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 57 transitions. [2020-10-24 01:04:34,606 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 57 transitions. Word has length 45 [2020-10-24 01:04:34,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:04:34,607 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 57 transitions. [2020-10-24 01:04:34,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-24 01:04:34,607 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 57 transitions. [2020-10-24 01:04:34,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-24 01:04:34,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:04:34,609 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, 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] [2020-10-24 01:04:34,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 01:04:34,610 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:04:34,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:04:34,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1893205753, now seen corresponding path program 1 times [2020-10-24 01:04:34,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:04:34,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529083441] [2020-10-24 01:04:34,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:04:34,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 01:04:34,727 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 01:04:34,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 01:04:34,875 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 01:04:34,925 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-24 01:04:34,926 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 01:04:34,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 01:04:34,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 01:04:34 BoogieIcfgContainer [2020-10-24 01:04:34,988 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 01:04:34,990 INFO L168 Benchmark]: Toolchain (without parser) took 3779.21 ms. Allocated memory was 165.7 MB in the beginning and 199.2 MB in the end (delta: 33.6 MB). Free memory was 141.2 MB in the beginning and 112.8 MB in the end (delta: 28.4 MB). Peak memory consumption was 63.0 MB. Max. memory is 8.0 GB. [2020-10-24 01:04:34,991 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 165.7 MB. Free memory is still 139.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-24 01:04:34,992 INFO L168 Benchmark]: CACSL2BoogieTranslator took 351.84 ms. Allocated memory is still 165.7 MB. Free memory was 140.4 MB in the beginning and 131.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-24 01:04:34,993 INFO L168 Benchmark]: Boogie Preprocessor took 41.42 ms. Allocated memory is still 165.7 MB. Free memory was 131.1 MB in the beginning and 129.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-24 01:04:34,994 INFO L168 Benchmark]: RCFGBuilder took 646.53 ms. Allocated memory is still 165.7 MB. Free memory was 129.4 MB in the beginning and 145.2 MB in the end (delta: -15.8 MB). Peak memory consumption was 23.8 MB. Max. memory is 8.0 GB. [2020-10-24 01:04:34,996 INFO L168 Benchmark]: TraceAbstraction took 2722.82 ms. Allocated memory was 165.7 MB in the beginning and 199.2 MB in the end (delta: 33.6 MB). Free memory was 144.7 MB in the beginning and 112.8 MB in the end (delta: 31.9 MB). Peak memory consumption was 65.4 MB. Max. memory is 8.0 GB. [2020-10-24 01:04:35,002 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 165.7 MB. Free memory is still 139.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 351.84 ms. Allocated memory is still 165.7 MB. Free memory was 140.4 MB in the beginning and 131.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.42 ms. Allocated memory is still 165.7 MB. Free memory was 131.1 MB in the beginning and 129.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 646.53 ms. Allocated memory is still 165.7 MB. Free memory was 129.4 MB in the beginning and 145.2 MB in the end (delta: -15.8 MB). Peak memory consumption was 23.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2722.82 ms. Allocated memory was 165.7 MB in the beginning and 199.2 MB in the end (delta: 33.6 MB). Free memory was 144.7 MB in the beginning and 112.8 MB in the end (delta: 31.9 MB). Peak memory consumption was 65.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L23] int a, b; VAL [a={10:0}, b={11:0}] [L24] int *p1, *p2; VAL [a={10:0}, b={11:0}, p1={13:0}, p2={3:0}] [L26] p1 = &a VAL [a={10:0}, b={11:0}, p1={13:0}, p2={3:0}] [L27] p2 = &b VAL [a={10:0}, b={11:0}, p1={13:0}, p2={3:0}] [L29] b = 1 VAL [a={10:0}, b={11:0}, p1={13:0}, p2={3:0}] [L30] a = 5 VAL [a={10:0}, b={11:0}, p1={13:0}, p2={3:0}] [L32] EXPR \read(a) VAL [\read(a)=5, a={10:0}, b={11:0}, p1={13:0}, p2={3:0}] [L32] a-- VAL [\read(a)=5, a={10:0}, a--=5, b={11:0}, p1={13:0}, p2={3:0}] [L34] EXPR \read(a) VAL [\read(a)=4, a={10:0}, b={11:0}, p1={13:0}, p2={3:0}] [L34] CALL, EXPR f(a, &p1, &p2) VAL [\old(a)=4, p1={13:0}, p2={3:0}] [L14] COND TRUE a == 4 VAL [\old(a)=4, a=4, p1={13:0}, p1={13:0}, p2={3:0}, p2={3:0}] [L15] CALL g(p1, p2) VAL [p1={13:0}, p2={3:0}] [L7] EXPR \read(**p2) VAL [\read(**p2)={11:0}, p1={13:0}, p1={13:0}, p2={3:0}, p2={3:0}] [L7] int *pq = *p2; VAL [\read(**p2)={11:0}, p1={13:0}, p1={13:0}, p2={3:0}, p2={3:0}, pq={11:0}] [L9] EXPR \read(**p2) VAL [\read(**p2)={11:0}, p1={13:0}, p1={13:0}, p2={3:0}, p2={3:0}, pq={11:0}] [L9] *p1 = *p2 VAL [\read(**p2)={11:0}, p1={13:0}, p1={13:0}, p2={3:0}, p2={3:0}, pq={11:0}] [L10] *pq = 0 VAL [p1={13:0}, p1={13:0}, p2={3:0}, p2={3:0}, pq={11:0}] [L15] RET g(p1, p2) VAL [\old(a)=4, a=4, p1={13:0}, p1={13:0}, p2={3:0}, p2={3:0}] [L16] return 1; VAL [\old(a)=4, \result=1, a=4, p1={13:0}, p1={13:0}, p2={3:0}, p2={3:0}] [L34] RET, EXPR f(a, &p1, &p2) VAL [\read(a)=4, a={10:0}, b={11:0}, f(a, &p1, &p2)=1, p1={13:0}, p2={3:0}] [L34] a = f(a, &p1, &p2) VAL [\read(a)=4, a={10:0}, b={11:0}, f(a, &p1, &p2)=1, p1={13:0}, p2={3:0}] [L36] EXPR \read(*p1) VAL [\read(*p1)={11:0}, \read(*p1)=0, a={10:0}, b={11:0}, p1={13:0}, p2={3:0}] [L36] COND TRUE *p1 == 0 VAL [\read(*p1)={11:0}, \read(*p1)=0, a={10:0}, b={11:0}, p1={13:0}, p2={3:0}] [L42] CALL reach_error() [L3] __assert_fail("0", "test06.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 86 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 59 SDtfs, 58 SDslu, 262 SDs, 0 SdLazy, 335 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=86occurred 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: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 102 NumberOfCodeBlocks, 102 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 44 ConstructedInterpolants, 0 QuantifiedInterpolants, 5632 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 incorrect! Received shutdown request...