/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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/test22-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 19:05:32,983 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:05:32,986 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:05:33,016 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 19:05:33,017 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 19:05:33,018 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 19:05:33,019 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 19:05:33,021 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 19:05:33,023 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 19:05:33,023 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 19:05:33,024 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 19:05:33,025 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 19:05:33,026 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 19:05:33,027 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 19:05:33,028 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 19:05:33,029 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 19:05:33,029 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 19:05:33,030 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 19:05:33,032 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 19:05:33,033 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 19:05:33,036 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 19:05:33,036 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 19:05:33,037 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 19:05:33,041 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 19:05:33,047 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 19:05:33,054 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 19:05:33,055 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 19:05:33,055 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 19:05:33,056 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 19:05:33,065 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:05:33,065 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:05:33,067 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:05:33,067 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:05:33,067 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:05:33,067 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:05:33,067 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:05:33,068 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:05:33,068 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:05:33,068 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:05:33,068 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:05:33,068 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:05:33,069 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:05:33,069 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:05:33,069 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:05:33,069 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:05:33,069 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:05:33,070 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:05:33,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:05:33,070 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:05:33,070 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:05:33,070 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:05:33,071 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:05:33,374 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:05:33,395 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:05:33,400 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:05:33,402 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:05:33,405 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:05:33,406 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test22-2.c [2020-08-22 19:05:33,481 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a834af3e6/d5dc64e954e94de8a54da781413b65fa/FLAG0f62ea849 [2020-08-22 19:05:33,961 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:05:33,961 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test22-2.c [2020-08-22 19:05:33,969 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a834af3e6/d5dc64e954e94de8a54da781413b65fa/FLAG0f62ea849 [2020-08-22 19:05:34,317 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a834af3e6/d5dc64e954e94de8a54da781413b65fa [2020-08-22 19:05:34,328 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:05:34,330 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:05:34,332 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:05:34,332 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:05:34,336 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:05:34,337 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:05:34" (1/1) ... [2020-08-22 19:05:34,340 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cfe2b64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:05:34, skipping insertion in model container [2020-08-22 19:05:34,340 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:05:34" (1/1) ... [2020-08-22 19:05:34,348 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:05:34,369 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:05:34,600 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:05:34,612 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:05:34,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:05:34,651 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:05:34,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:05:34 WrapperNode [2020-08-22 19:05:34,652 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:05:34,653 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:05:34,653 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:05:34,653 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:05:34,747 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:05:34" (1/1) ... [2020-08-22 19:05:34,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:05:34" (1/1) ... [2020-08-22 19:05:34,755 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:05:34" (1/1) ... [2020-08-22 19:05:34,755 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:05:34" (1/1) ... [2020-08-22 19:05:34,764 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:05:34" (1/1) ... [2020-08-22 19:05:34,769 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:05:34" (1/1) ... [2020-08-22 19:05:34,771 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:05:34" (1/1) ... [2020-08-22 19:05:34,773 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:05:34,774 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:05:34,774 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:05:34,774 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:05:34,775 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:05:34" (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 [2020-08-22 19:05:34,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:05:34,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:05:34,832 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-08-22 19:05:34,832 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dummy [2020-08-22 19:05:34,833 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-08-22 19:05:34,833 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:05:34,833 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:05:34,833 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 19:05:34,833 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-22 19:05:34,833 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-22 19:05:34,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 19:05:34,834 INFO L130 BoogieDeclarations]: Found specification of procedure get_dummy [2020-08-22 19:05:34,834 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-22 19:05:34,834 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 19:05:34,834 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:05:34,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:05:34,834 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 19:05:34,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-22 19:05:34,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:05:34,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 19:05:35,213 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:05:35,213 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 19:05:35,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:05:35 BoogieIcfgContainer [2020-08-22 19:05:35,218 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:05:35,219 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:05:35,220 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:05:35,222 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:05:35,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:05:34" (1/3) ... [2020-08-22 19:05:35,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76ed65cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:05:35, skipping insertion in model container [2020-08-22 19:05:35,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:05:34" (2/3) ... [2020-08-22 19:05:35,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76ed65cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:05:35, skipping insertion in model container [2020-08-22 19:05:35,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:05:35" (3/3) ... [2020-08-22 19:05:35,226 INFO L109 eAbstractionObserver]: Analyzing ICFG test22-2.c [2020-08-22 19:05:35,236 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:05:35,242 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 19:05:35,257 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 19:05:35,281 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:05:35,281 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:05:35,281 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:05:35,281 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:05:35,281 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:05:35,282 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:05:35,282 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:05:35,282 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:05:35,299 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states. [2020-08-22 19:05:35,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-22 19:05:35,311 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:05:35,312 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:05:35,312 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:05:35,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:05:35,317 INFO L82 PathProgramCache]: Analyzing trace with hash 2026025413, now seen corresponding path program 1 times [2020-08-22 19:05:35,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:05:35,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521445885] [2020-08-22 19:05:35,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:05:35,382 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:05:35,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:35,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:05:35,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:35,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-22 19:05:35,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:35,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 19:05:35,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:35,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-22 19:05:35,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:35,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-22 19:05:35,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:35,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-22 19:05:35,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:35,741 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 19:05:35,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521445885] [2020-08-22 19:05:35,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:05:35,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 19:05:35,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111970286] [2020-08-22 19:05:35,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 19:05:35,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:05:35,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 19:05:35,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 19:05:35,772 INFO L87 Difference]: Start difference. First operand 88 states. Second operand 4 states. [2020-08-22 19:05:36,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:05:36,183 INFO L93 Difference]: Finished difference Result 107 states and 114 transitions. [2020-08-22 19:05:36,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 19:05:36,185 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-08-22 19:05:36,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:05:36,195 INFO L225 Difference]: With dead ends: 107 [2020-08-22 19:05:36,195 INFO L226 Difference]: Without dead ends: 79 [2020-08-22 19:05:36,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 19:05:36,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-22 19:05:36,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-08-22 19:05:36,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-22 19:05:36,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2020-08-22 19:05:36,269 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 83 [2020-08-22 19:05:36,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:05:36,271 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2020-08-22 19:05:36,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 19:05:36,272 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2020-08-22 19:05:36,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-22 19:05:36,275 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:05:36,276 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:05:36,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:05:36,276 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:05:36,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:05:36,277 INFO L82 PathProgramCache]: Analyzing trace with hash 177245466, now seen corresponding path program 1 times [2020-08-22 19:05:36,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:05:36,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769093277] [2020-08-22 19:05:36,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:05:36,281 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:05:36,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:36,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:05:36,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:36,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-22 19:05:36,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:36,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 19:05:36,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:36,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-22 19:05:36,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:36,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-22 19:05:36,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:36,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 19:05:36,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:36,462 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 19:05:36,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769093277] [2020-08-22 19:05:36,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:05:36,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 19:05:36,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605749844] [2020-08-22 19:05:36,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 19:05:36,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:05:36,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 19:05:36,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 19:05:36,466 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 5 states. [2020-08-22 19:05:36,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:05:36,775 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2020-08-22 19:05:36,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 19:05:36,776 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 85 [2020-08-22 19:05:36,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:05:36,778 INFO L225 Difference]: With dead ends: 106 [2020-08-22 19:05:36,779 INFO L226 Difference]: Without dead ends: 79 [2020-08-22 19:05:36,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-22 19:05:36,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-22 19:05:36,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-08-22 19:05:36,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-22 19:05:36,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2020-08-22 19:05:36,800 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 85 [2020-08-22 19:05:36,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:05:36,801 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2020-08-22 19:05:36,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 19:05:36,801 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2020-08-22 19:05:36,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-22 19:05:36,803 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:05:36,803 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:05:36,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:05:36,803 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:05:36,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:05:36,804 INFO L82 PathProgramCache]: Analyzing trace with hash 679818391, now seen corresponding path program 1 times [2020-08-22 19:05:36,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:05:36,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421397689] [2020-08-22 19:05:36,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:05:36,807 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:05:36,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:36,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:05:36,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:37,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-22 19:05:37,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:37,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 19:05:37,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:37,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-22 19:05:37,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:37,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-22 19:05:37,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:37,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-22 19:05:37,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:37,108 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 19:05:37,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421397689] [2020-08-22 19:05:37,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:05:37,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-22 19:05:37,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103023578] [2020-08-22 19:05:37,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 19:05:37,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:05:37,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 19:05:37,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-22 19:05:37,123 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 14 states. [2020-08-22 19:05:38,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:05:38,533 INFO L93 Difference]: Finished difference Result 167 states and 178 transitions. [2020-08-22 19:05:38,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 19:05:38,534 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 87 [2020-08-22 19:05:38,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:05:38,544 INFO L225 Difference]: With dead ends: 167 [2020-08-22 19:05:38,545 INFO L226 Difference]: Without dead ends: 153 [2020-08-22 19:05:38,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2020-08-22 19:05:38,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-08-22 19:05:38,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 108. [2020-08-22 19:05:38,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-22 19:05:38,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 117 transitions. [2020-08-22 19:05:38,605 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 117 transitions. Word has length 87 [2020-08-22 19:05:38,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:05:38,608 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 117 transitions. [2020-08-22 19:05:38,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 19:05:38,608 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 117 transitions. [2020-08-22 19:05:38,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-22 19:05:38,616 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:05:38,617 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:05:38,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 19:05:38,617 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:05:38,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:05:38,618 INFO L82 PathProgramCache]: Analyzing trace with hash -2022406921, now seen corresponding path program 1 times [2020-08-22 19:05:38,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:05:38,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716182817] [2020-08-22 19:05:38,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:05:38,623 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:05:38,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 19:05:38,661 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 19:05:38,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 19:05:38,688 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 19:05:38,724 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 19:05:38,724 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 19:05:38,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 19:05:38,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 07:05:38 BoogieIcfgContainer [2020-08-22 19:05:38,746 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 19:05:38,749 INFO L168 Benchmark]: Toolchain (without parser) took 4418.14 ms. Allocated memory was 138.9 MB in the beginning and 247.5 MB in the end (delta: 108.5 MB). Free memory was 102.6 MB in the beginning and 106.7 MB in the end (delta: -4.0 MB). Peak memory consumption was 104.5 MB. Max. memory is 7.1 GB. [2020-08-22 19:05:38,750 INFO L168 Benchmark]: CDTParser took 0.89 ms. Allocated memory is still 138.9 MB. Free memory was 121.5 MB in the beginning and 121.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 19:05:38,751 INFO L168 Benchmark]: CACSL2BoogieTranslator took 320.46 ms. Allocated memory is still 138.9 MB. Free memory was 102.4 MB in the beginning and 92.0 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-22 19:05:38,752 INFO L168 Benchmark]: Boogie Preprocessor took 120.73 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 92.0 MB in the beginning and 179.1 MB in the end (delta: -87.2 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-08-22 19:05:38,753 INFO L168 Benchmark]: RCFGBuilder took 444.39 ms. Allocated memory is still 201.9 MB. Free memory was 179.1 MB in the beginning and 156.6 MB in the end (delta: 22.5 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. [2020-08-22 19:05:38,754 INFO L168 Benchmark]: TraceAbstraction took 3526.93 ms. Allocated memory was 201.9 MB in the beginning and 247.5 MB in the end (delta: 45.6 MB). Free memory was 155.9 MB in the beginning and 106.7 MB in the end (delta: 49.2 MB). Peak memory consumption was 94.9 MB. Max. memory is 7.1 GB. [2020-08-22 19:05:38,758 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.89 ms. Allocated memory is still 138.9 MB. Free memory was 121.5 MB in the beginning and 121.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 320.46 ms. Allocated memory is still 138.9 MB. Free memory was 102.4 MB in the beginning and 92.0 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 120.73 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 92.0 MB in the beginning and 179.1 MB in the end (delta: -87.2 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 444.39 ms. Allocated memory is still 201.9 MB. Free memory was 179.1 MB in the beginning and 156.6 MB in the end (delta: 22.5 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3526.93 ms. Allocated memory was 201.9 MB in the beginning and 247.5 MB in the end (delta: 45.6 MB). Free memory was 155.9 MB in the beginning and 106.7 MB in the end (delta: 49.2 MB). Peak memory consumption was 94.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 48]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L9] struct dummy d1, d2; [L32] CALL init() [L13] d1.a = __VERIFIER_nondet_int() [L14] d1.b = __VERIFIER_nondet_int() [L16] d2.a = __VERIFIER_nondet_int() [L17] d2.b = __VERIFIER_nondet_int() [L32] RET init() [L33] CALL, EXPR get_dummy() [L22] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 [L22] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L33] RET, EXPR get_dummy() [L33] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(), *pd3 = get_dummy(); [L33] CALL, EXPR get_dummy() [L22] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 [L22] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L33] RET, EXPR get_dummy() [L33] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(), *pd3 = get_dummy(); [L33] CALL, EXPR get_dummy() [L22] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 [L22] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L33] RET, EXPR get_dummy() [L33] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(), *pd3 = get_dummy(); [L34] int i = __VERIFIER_nondet_int(); [L35] pd1 != 0 && pd1 == pd2 && (*pd2).a > 0 [L35] EXPR (*pd2).a [L35] pd1 != 0 && pd1 == pd2 && (*pd2).a > 0 [L35] COND TRUE pd1 != 0 && pd1 == pd2 && (*pd2).a > 0 [L36] int *pa = &pd1->a; [L37] EXPR pd3->a [L37] i = pd3->a - 10 [L38] EXPR \read(*pa) [L38] COND FALSE !(i < *pa) [L41] CALL, EXPR check(pd2, i) [L27] EXPR s1->a [L27] return s1->a == i; [L41] RET, EXPR check(pd2, i) [L41] COND TRUE !check(pd2, i) [L48] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 88 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.4s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 209 SDtfs, 396 SDslu, 76 SDs, 0 SdLazy, 1267 SolverSat, 62 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=108occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 45 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, 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 incorrect! Received shutdown request...