/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/loop-invariants/mod4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 06:50:31,875 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 06:50:31,878 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 06:50:31,932 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 06:50:31,963 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 06:50:31,971 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 06:50:31,973 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 06:50:31,976 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 06:50:31,978 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 06:50:31,981 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 06:50:32,007 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 06:50:32,015 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 06:50:32,019 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 06:50:32,022 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 06:50:32,024 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 06:50:32,028 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 06:50:32,038 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 06:50:32,051 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 06:50:32,052 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 06:50:32,053 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 06:50:32,055 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 06:50:32,080 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 06:50:32,081 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 06:50:32,088 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 06:50:32,088 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 06:50:32,088 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 06:50:32,089 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 06:50:32,089 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 06:50:32,089 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 06:50:32,089 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 06:50:32,090 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 06:50:32,091 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 06:50:32,092 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 06:50:32,092 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 06:50:32,093 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 06:50:32,093 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 06:50:32,093 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 06:50:32,094 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 06:50:32,094 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 06:50:32,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 06:50:32,095 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 06:50:32,096 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 06:50:32,102 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 06:50:32,102 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 06:50:32,588 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 06:50:32,630 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 06:50:32,634 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 06:50:32,636 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 06:50:32,637 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 06:50:32,638 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/mod4.c [2020-11-07 06:50:32,735 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26d5bf6a4/fb47e396f4f34799b0eec8f6060444ef/FLAGb873e3cc8 [2020-11-07 06:50:33,494 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 06:50:33,495 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/mod4.c [2020-11-07 06:50:33,504 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26d5bf6a4/fb47e396f4f34799b0eec8f6060444ef/FLAGb873e3cc8 [2020-11-07 06:50:33,834 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26d5bf6a4/fb47e396f4f34799b0eec8f6060444ef [2020-11-07 06:50:33,837 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 06:50:33,846 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 06:50:33,848 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 06:50:33,848 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 06:50:33,853 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 06:50:33,854 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:50:33" (1/1) ... [2020-11-07 06:50:33,858 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3536e044 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:50:33, skipping insertion in model container [2020-11-07 06:50:33,859 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:50:33" (1/1) ... [2020-11-07 06:50:33,868 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 06:50:33,885 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 06:50:34,086 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:50:34,099 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 06:50:34,118 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:50:34,138 INFO L208 MainTranslator]: Completed translation [2020-11-07 06:50:34,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:50:34 WrapperNode [2020-11-07 06:50:34,139 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 06:50:34,141 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 06:50:34,141 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 06:50:34,141 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 06:50:34,157 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:50:34" (1/1) ... [2020-11-07 06:50:34,157 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:50:34" (1/1) ... [2020-11-07 06:50:34,166 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:50:34" (1/1) ... [2020-11-07 06:50:34,167 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:50:34" (1/1) ... [2020-11-07 06:50:34,174 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:50:34" (1/1) ... [2020-11-07 06:50:34,180 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:50:34" (1/1) ... [2020-11-07 06:50:34,182 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:50:34" (1/1) ... [2020-11-07 06:50:34,185 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 06:50:34,186 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 06:50:34,186 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 06:50:34,186 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 06:50:34,187 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:50:34" (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 [2020-11-07 06:50:34,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 06:50:34,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 06:50:34,276 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 06:50:34,276 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 06:50:34,276 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 06:50:34,276 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 06:50:34,277 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 06:50:34,277 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 06:50:34,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 06:50:34,277 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 06:50:34,277 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 06:50:34,277 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 06:50:34,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 06:50:34,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 06:50:34,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 06:50:34,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 06:50:34,278 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 06:50:34,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 06:50:34,569 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 06:50:34,570 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-07 06:50:34,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:50:34 BoogieIcfgContainer [2020-11-07 06:50:34,574 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 06:50:34,578 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 06:50:34,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 06:50:34,585 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 06:50:34,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:50:33" (1/3) ... [2020-11-07 06:50:34,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fd4ba1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:50:34, skipping insertion in model container [2020-11-07 06:50:34,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:50:34" (2/3) ... [2020-11-07 06:50:34,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fd4ba1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:50:34, skipping insertion in model container [2020-11-07 06:50:34,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:50:34" (3/3) ... [2020-11-07 06:50:34,592 INFO L111 eAbstractionObserver]: Analyzing ICFG mod4.c [2020-11-07 06:50:34,667 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 06:50:34,681 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 06:50:34,723 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 06:50:34,770 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 06:50:34,771 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 06:50:34,771 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 06:50:34,771 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 06:50:34,771 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 06:50:34,772 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 06:50:34,772 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 06:50:34,772 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 06:50:34,793 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-11-07 06:50:34,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-07 06:50:34,809 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:50:34,810 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] [2020-11-07 06:50:34,811 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:50:34,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:50:34,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1544472207, now seen corresponding path program 1 times [2020-11-07 06:50:34,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:50:34,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544831642] [2020-11-07 06:50:34,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:50:35,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:50:35,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:50:35,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:50:35,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:50:35,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544831642] [2020-11-07 06:50:35,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:50:35,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 06:50:35,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720910271] [2020-11-07 06:50:35,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 06:50:35,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:50:35,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 06:50:35,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 06:50:35,319 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2020-11-07 06:50:35,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:50:35,455 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2020-11-07 06:50:35,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 06:50:35,458 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-11-07 06:50:35,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:50:35,470 INFO L225 Difference]: With dead ends: 54 [2020-11-07 06:50:35,470 INFO L226 Difference]: Without dead ends: 31 [2020-11-07 06:50:35,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 06:50:35,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-07 06:50:35,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-11-07 06:50:35,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-07 06:50:35,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-11-07 06:50:35,539 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 26 [2020-11-07 06:50:35,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:50:35,540 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-11-07 06:50:35,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 06:50:35,540 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-11-07 06:50:35,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-07 06:50:35,541 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:50:35,541 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] [2020-11-07 06:50:35,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 06:50:35,542 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:50:35,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:50:35,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1541524328, now seen corresponding path program 1 times [2020-11-07 06:50:35,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:50:35,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339557125] [2020-11-07 06:50:35,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:50:35,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:50:35,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:50:35,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:50:35,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:50:35,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339557125] [2020-11-07 06:50:35,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:50:35,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 06:50:35,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732124161] [2020-11-07 06:50:35,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 06:50:35,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:50:35,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 06:50:35,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 06:50:35,754 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 6 states. [2020-11-07 06:50:36,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:50:36,096 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-11-07 06:50:36,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 06:50:36,097 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-11-07 06:50:36,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:50:36,101 INFO L225 Difference]: With dead ends: 42 [2020-11-07 06:50:36,102 INFO L226 Difference]: Without dead ends: 35 [2020-11-07 06:50:36,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-07 06:50:36,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-07 06:50:36,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2020-11-07 06:50:36,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-07 06:50:36,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-11-07 06:50:36,133 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 28 [2020-11-07 06:50:36,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:50:36,133 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-11-07 06:50:36,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 06:50:36,135 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-11-07 06:50:36,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-07 06:50:36,138 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:50:36,139 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-07 06:50:36,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 06:50:36,140 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:50:36,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:50:36,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1480037631, now seen corresponding path program 1 times [2020-11-07 06:50:36,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:50:36,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270577146] [2020-11-07 06:50:36,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:50:36,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:50:36,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:50:36,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:50:36,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:50:36,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270577146] [2020-11-07 06:50:36,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:50:36,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-07 06:50:36,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75100247] [2020-11-07 06:50:36,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 06:50:36,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:50:36,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 06:50:36,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-07 06:50:36,390 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 7 states. [2020-11-07 06:50:36,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:50:36,643 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-11-07 06:50:36,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 06:50:36,643 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-11-07 06:50:36,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:50:36,644 INFO L225 Difference]: With dead ends: 35 [2020-11-07 06:50:36,644 INFO L226 Difference]: Without dead ends: 0 [2020-11-07 06:50:36,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-07 06:50:36,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-07 06:50:36,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-07 06:50:36,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-07 06:50:36,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-07 06:50:36,647 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2020-11-07 06:50:36,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:50:36,647 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-07 06:50:36,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 06:50:36,648 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-07 06:50:36,648 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-07 06:50:36,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 06:50:36,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-07 06:50:37,346 INFO L269 CegarLoopResult]: At program point reach_errorEXIT(line 3) the Hoare annotation is: true [2020-11-07 06:50:37,347 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-11-07 06:50:37,347 INFO L269 CegarLoopResult]: At program point reach_errorFINAL(line 3) the Hoare annotation is: true [2020-11-07 06:50:37,347 INFO L269 CegarLoopResult]: At program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) the Hoare annotation is: true [2020-11-07 06:50:37,347 INFO L269 CegarLoopResult]: At program point L3-2(line 3) the Hoare annotation is: true [2020-11-07 06:50:37,348 INFO L269 CegarLoopResult]: At program point L3-3(line 3) the Hoare annotation is: true [2020-11-07 06:50:37,348 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-07 06:50:37,348 INFO L269 CegarLoopResult]: At program point L3-4(line 3) the Hoare annotation is: true [2020-11-07 06:50:37,349 INFO L269 CegarLoopResult]: At program point L-1-1(line -1) the Hoare annotation is: true [2020-11-07 06:50:37,349 INFO L269 CegarLoopResult]: At program point L3-5(line 3) the Hoare annotation is: true [2020-11-07 06:50:37,350 INFO L269 CegarLoopResult]: At program point ULTIMATE.initFINAL(line 3) the Hoare annotation is: true [2020-11-07 06:50:37,350 INFO L269 CegarLoopResult]: At program point L3-6(line 3) the Hoare annotation is: true [2020-11-07 06:50:37,351 INFO L269 CegarLoopResult]: At program point L3-7(line 3) the Hoare annotation is: true [2020-11-07 06:50:37,351 INFO L269 CegarLoopResult]: At program point L3-8(line 3) the Hoare annotation is: true [2020-11-07 06:50:37,351 INFO L269 CegarLoopResult]: At program point L3-9(line 3) the Hoare annotation is: true [2020-11-07 06:50:37,352 INFO L269 CegarLoopResult]: At program point L3-10(line 3) the Hoare annotation is: true [2020-11-07 06:50:37,352 INFO L269 CegarLoopResult]: At program point L3-11(line 3) the Hoare annotation is: true [2020-11-07 06:50:37,352 INFO L262 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-11-07 06:50:37,352 INFO L269 CegarLoopResult]: At program point L3(line 3) the Hoare annotation is: true [2020-11-07 06:50:37,352 INFO L269 CegarLoopResult]: At program point L3-1(line 3) the Hoare annotation is: true [2020-11-07 06:50:37,352 INFO L269 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-11-07 06:50:37,353 INFO L269 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-11-07 06:50:37,353 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-07 06:50:37,353 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-07 06:50:37,353 INFO L269 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-11-07 06:50:37,353 INFO L269 CegarLoopResult]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2020-11-07 06:50:37,353 INFO L269 CegarLoopResult]: At program point mainEXIT(lines 11 18) the Hoare annotation is: true [2020-11-07 06:50:37,354 INFO L269 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: true [2020-11-07 06:50:37,354 INFO L262 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (or (let ((.cse0 (div main_~x~0 4))) (and (<= main_~x~0 (* 4 .cse0)) (< 0 .cse0))) (= main_~x~0 0)) [2020-11-07 06:50:37,354 INFO L269 CegarLoopResult]: At program point mainFINAL(lines 11 18) the Hoare annotation is: true [2020-11-07 06:50:37,354 INFO L262 CegarLoopResult]: At program point L13-1(lines 13 15) the Hoare annotation is: (or (let ((.cse0 (div main_~x~0 4))) (and (<= main_~x~0 (* 4 .cse0)) (< 0 .cse0))) (= main_~x~0 0)) [2020-11-07 06:50:37,355 INFO L262 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (or (let ((.cse0 (div main_~x~0 4))) (and (<= main_~x~0 (* 4 .cse0)) (< 0 .cse0))) (= main_~x~0 0)) [2020-11-07 06:50:37,355 INFO L262 CegarLoopResult]: At program point L13-4(line 13) the Hoare annotation is: (or (let ((.cse0 (div main_~x~0 4))) (and (<= main_~x~0 (* 4 .cse0)) (< 0 .cse0))) (= main_~x~0 0)) [2020-11-07 06:50:37,355 INFO L262 CegarLoopResult]: At program point L13-5(lines 13 15) the Hoare annotation is: (or (let ((.cse0 (div main_~x~0 4))) (and (<= main_~x~0 (* 4 .cse0)) (< 0 .cse0))) (= main_~x~0 0)) [2020-11-07 06:50:37,355 INFO L262 CegarLoopResult]: At program point L13-6(lines 13 15) the Hoare annotation is: (or (let ((.cse0 (div main_~x~0 4))) (and (<= main_~x~0 (* 4 .cse0)) (< 0 .cse0))) (= main_~x~0 0)) [2020-11-07 06:50:37,355 INFO L269 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2020-11-07 06:50:37,356 INFO L269 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 5 10) the Hoare annotation is: true [2020-11-07 06:50:37,356 INFO L262 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-11-07 06:50:37,357 INFO L262 CegarLoopResult]: At program point L6(lines 6 8) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-11-07 06:50:37,357 INFO L262 CegarLoopResult]: At program point L7-1(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-11-07 06:50:37,357 INFO L269 CegarLoopResult]: At program point L6-2(lines 5 10) the Hoare annotation is: true [2020-11-07 06:50:37,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:50:37 BoogieIcfgContainer [2020-11-07 06:50:37,385 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 06:50:37,395 INFO L168 Benchmark]: Toolchain (without parser) took 3547.97 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 127.5 MB in the beginning and 95.9 MB in the end (delta: 31.6 MB). Peak memory consumption was 69.6 MB. Max. memory is 8.0 GB. [2020-11-07 06:50:37,398 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 151.0 MB. Free memory is still 125.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 06:50:37,400 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.85 ms. Allocated memory is still 151.0 MB. Free memory was 126.9 MB in the beginning and 117.8 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-07 06:50:37,401 INFO L168 Benchmark]: Boogie Preprocessor took 43.97 ms. Allocated memory is still 151.0 MB. Free memory was 117.6 MB in the beginning and 116.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-07 06:50:37,403 INFO L168 Benchmark]: RCFGBuilder took 388.20 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 102.4 MB in the end (delta: 13.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-11-07 06:50:37,405 INFO L168 Benchmark]: TraceAbstraction took 2807.77 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 102.1 MB in the beginning and 95.9 MB in the end (delta: 6.1 MB). Peak memory consumption was 44.5 MB. Max. memory is 8.0 GB. [2020-11-07 06:50:37,417 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 151.0 MB. Free memory is still 125.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 291.85 ms. Allocated memory is still 151.0 MB. Free memory was 126.9 MB in the beginning and 117.8 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.97 ms. Allocated memory is still 151.0 MB. Free memory was 117.6 MB in the beginning and 116.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 388.20 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 102.4 MB in the end (delta: 13.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2807.77 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 102.1 MB in the beginning and 95.9 MB in the end (delta: 6.1 MB). Peak memory consumption was 44.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: (x <= 4 * (x / 4) && 0 < x / 4) || x == 0 - ProcedureContractResult [Line: 3]: Procedure Contract for reach_error Derived contract for procedure reach_error: 1 - ProcedureContractResult [Line: 11]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 5]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.8s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 95 SDtfs, 46 SDslu, 151 SDs, 0 SdLazy, 114 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred 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, 3 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 41 LocationsWithAnnotation, 61 PreInvPairs, 77 NumberOfFragments, 178 HoareAnnotationTreeSize, 61 FomulaSimplifications, 264 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 41 FomulaSimplificationsInter, 627 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 86 NumberOfCodeBlocks, 86 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 83 ConstructedInterpolants, 0 QuantifiedInterpolants, 7105 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 0/2 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...