/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_b2_o3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 20:27:04,040 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 20:27:04,043 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 20:27:04,092 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 20:27:04,093 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 20:27:04,096 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 20:27:04,100 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 20:27:04,108 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 20:27:04,112 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 20:27:04,120 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 20:27:04,121 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 20:27:04,122 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 20:27:04,122 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 20:27:04,123 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 20:27:04,124 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 20:27:04,126 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 20:27:04,127 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 20:27:04,128 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 20:27:04,144 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 20:27:04,148 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 20:27:04,152 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 20:27:04,154 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 20:27:04,171 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 20:27:04,173 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 20:27:04,179 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 20:27:04,194 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 20:27:04,195 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 20:27:04,196 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 20:27:04,197 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 20:27:04,209 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 20:27:04,210 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 20:27:04,212 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 20:27:04,212 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 20:27:04,212 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 20:27:04,212 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 20:27:04,213 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 20:27:04,213 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 20:27:04,213 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 20:27:04,213 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 20:27:04,213 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 20:27:04,214 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 20:27:04,214 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 20:27:04,214 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 20:27:04,214 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 20:27:04,214 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 20:27:04,215 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 20:27:04,215 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 20:27:04,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:27:04,215 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 20:27:04,216 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 20:27:04,216 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 20:27:04,216 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 20:27:04,616 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 20:27:04,650 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 20:27:04,654 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 20:27:04,655 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 20:27:04,656 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 20:27:04,657 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_b2_o3.c [2020-10-23 20:27:04,741 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c71fd7949/0f0118f4db214cd092ca0c2b90422387/FLAGbf7776d77 [2020-10-23 20:27:05,413 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 20:27:05,414 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_b2_o3.c [2020-10-23 20:27:05,421 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c71fd7949/0f0118f4db214cd092ca0c2b90422387/FLAGbf7776d77 [2020-10-23 20:27:05,785 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c71fd7949/0f0118f4db214cd092ca0c2b90422387 [2020-10-23 20:27:05,788 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 20:27:05,797 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 20:27:05,799 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 20:27:05,799 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 20:27:05,803 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 20:27:05,804 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:27:05" (1/1) ... [2020-10-23 20:27:05,808 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77708402 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:05, skipping insertion in model container [2020-10-23 20:27:05,808 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:27:05" (1/1) ... [2020-10-23 20:27:05,817 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 20:27:05,831 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 20:27:05,986 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:27:06,000 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 20:27:06,035 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:27:06,051 INFO L208 MainTranslator]: Completed translation [2020-10-23 20:27:06,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:06 WrapperNode [2020-10-23 20:27:06,052 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 20:27:06,053 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 20:27:06,053 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 20:27:06,053 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 20:27:06,067 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:06" (1/1) ... [2020-10-23 20:27:06,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:06" (1/1) ... [2020-10-23 20:27:06,076 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:06" (1/1) ... [2020-10-23 20:27:06,076 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:06" (1/1) ... [2020-10-23 20:27:06,082 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:06" (1/1) ... [2020-10-23 20:27:06,084 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:06" (1/1) ... [2020-10-23 20:27:06,085 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:06" (1/1) ... [2020-10-23 20:27:06,087 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 20:27:06,089 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 20:27:06,089 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 20:27:06,089 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 20:27:06,090 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:06" (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 [2020-10-23 20:27:06,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 20:27:06,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 20:27:06,230 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 20:27:06,230 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-10-23 20:27:06,230 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 20:27:06,231 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-23 20:27:06,231 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 20:27:06,231 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 20:27:06,231 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 20:27:06,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 20:27:06,232 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-10-23 20:27:06,233 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 20:27:06,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 20:27:06,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 20:27:06,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 20:27:06,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 20:27:06,234 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 20:27:06,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 20:27:06,626 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 20:27:06,626 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 20:27:06,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:27:06 BoogieIcfgContainer [2020-10-23 20:27:06,628 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 20:27:06,630 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 20:27:06,630 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 20:27:06,633 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 20:27:06,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:27:05" (1/3) ... [2020-10-23 20:27:06,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d1696b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:27:06, skipping insertion in model container [2020-10-23 20:27:06,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:06" (2/3) ... [2020-10-23 20:27:06,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d1696b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:27:06, skipping insertion in model container [2020-10-23 20:27:06,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:27:06" (3/3) ... [2020-10-23 20:27:06,637 INFO L111 eAbstractionObserver]: Analyzing ICFG id_b2_o3.c [2020-10-23 20:27:06,649 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 20:27:06,655 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 20:27:06,670 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 20:27:06,709 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 20:27:06,709 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 20:27:06,709 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 20:27:06,709 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 20:27:06,709 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 20:27:06,710 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 20:27:06,710 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 20:27:06,710 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 20:27:06,728 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-10-23 20:27:06,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-23 20:27:06,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:06,739 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] [2020-10-23 20:27:06,740 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:06,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:06,747 INFO L82 PathProgramCache]: Analyzing trace with hash -891182369, now seen corresponding path program 1 times [2020-10-23 20:27:06,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:06,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420312837] [2020-10-23 20:27:06,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:06,842 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:06,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:07,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:07,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:07,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:27:07,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:07,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:27:07,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420312837] [2020-10-23 20:27:07,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:07,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 20:27:07,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487496051] [2020-10-23 20:27:07,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 20:27:07,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:07,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 20:27:07,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 20:27:07,188 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 6 states. [2020-10-23 20:27:07,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:07,705 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-10-23 20:27:07,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 20:27:07,707 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-23 20:27:07,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:07,718 INFO L225 Difference]: With dead ends: 53 [2020-10-23 20:27:07,718 INFO L226 Difference]: Without dead ends: 34 [2020-10-23 20:27:07,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-23 20:27:07,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-23 20:27:07,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-23 20:27:07,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-23 20:27:07,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-23 20:27:07,778 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 25 [2020-10-23 20:27:07,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:07,779 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-23 20:27:07,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 20:27:07,779 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-23 20:27:07,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-23 20:27:07,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:07,782 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 20:27:07,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 20:27:07,783 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:07,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:07,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1768365674, now seen corresponding path program 1 times [2020-10-23 20:27:07,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:07,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997870106] [2020-10-23 20:27:07,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:07,788 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:07,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:07,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:07,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:07,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:27:07,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:07,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:07,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:08,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 20:27:08,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997870106] [2020-10-23 20:27:08,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:08,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 20:27:08,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776682208] [2020-10-23 20:27:08,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 20:27:08,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:08,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 20:27:08,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 20:27:08,023 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 6 states. [2020-10-23 20:27:08,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:08,326 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-10-23 20:27:08,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 20:27:08,327 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2020-10-23 20:27:08,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:08,329 INFO L225 Difference]: With dead ends: 53 [2020-10-23 20:27:08,329 INFO L226 Difference]: Without dead ends: 40 [2020-10-23 20:27:08,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-23 20:27:08,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-23 20:27:08,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-10-23 20:27:08,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-23 20:27:08,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-23 20:27:08,346 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 34 [2020-10-23 20:27:08,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:08,347 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-23 20:27:08,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 20:27:08,347 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-23 20:27:08,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-23 20:27:08,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:08,349 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 20:27:08,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 20:27:08,349 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:08,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:08,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1897653930, now seen corresponding path program 1 times [2020-10-23 20:27:08,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:08,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716821128] [2020-10-23 20:27:08,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:08,354 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:08,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:08,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:08,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:08,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:27:08,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:08,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:08,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:08,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 20:27:08,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716821128] [2020-10-23 20:27:08,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:08,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-23 20:27:08,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112707945] [2020-10-23 20:27:08,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 20:27:08,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:08,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 20:27:08,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-23 20:27:08,560 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 9 states. [2020-10-23 20:27:09,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:09,046 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-10-23 20:27:09,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 20:27:09,047 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-23 20:27:09,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:09,048 INFO L225 Difference]: With dead ends: 46 [2020-10-23 20:27:09,049 INFO L226 Difference]: Without dead ends: 40 [2020-10-23 20:27:09,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-10-23 20:27:09,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-23 20:27:09,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-23 20:27:09,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-23 20:27:09,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-10-23 20:27:09,063 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 34 [2020-10-23 20:27:09,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:09,063 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-10-23 20:27:09,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 20:27:09,064 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-10-23 20:27:09,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-23 20:27:09,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:09,065 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 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] [2020-10-23 20:27:09,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 20:27:09,066 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:09,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:09,067 INFO L82 PathProgramCache]: Analyzing trace with hash -530753177, now seen corresponding path program 1 times [2020-10-23 20:27:09,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:09,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847624976] [2020-10-23 20:27:09,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:09,070 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:09,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:09,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:09,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:09,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:27:09,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:09,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:09,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:09,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:09,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:09,322 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-23 20:27:09,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1847624976] [2020-10-23 20:27:09,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:09,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-23 20:27:09,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039462838] [2020-10-23 20:27:09,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 20:27:09,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:09,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 20:27:09,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-23 20:27:09,325 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 9 states. [2020-10-23 20:27:09,744 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-10-23 20:27:09,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:09,966 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2020-10-23 20:27:09,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 20:27:09,969 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2020-10-23 20:27:09,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:09,971 INFO L225 Difference]: With dead ends: 59 [2020-10-23 20:27:09,971 INFO L226 Difference]: Without dead ends: 46 [2020-10-23 20:27:09,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-23 20:27:09,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-23 20:27:09,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-10-23 20:27:09,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-23 20:27:09,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-23 20:27:09,989 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 43 [2020-10-23 20:27:09,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:09,989 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-23 20:27:09,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 20:27:09,989 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-23 20:27:09,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-23 20:27:09,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:09,991 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 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] [2020-10-23 20:27:09,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 20:27:09,992 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:09,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:09,992 INFO L82 PathProgramCache]: Analyzing trace with hash -660041433, now seen corresponding path program 2 times [2020-10-23 20:27:09,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:09,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144259562] [2020-10-23 20:27:09,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:09,996 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:10,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:10,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:10,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:10,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:27:10,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:10,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:10,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:10,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:10,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:10,281 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-23 20:27:10,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144259562] [2020-10-23 20:27:10,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:10,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-23 20:27:10,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360130802] [2020-10-23 20:27:10,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 20:27:10,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:10,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 20:27:10,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-23 20:27:10,284 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 12 states. [2020-10-23 20:27:11,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:11,242 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2020-10-23 20:27:11,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-23 20:27:11,243 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-10-23 20:27:11,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:11,245 INFO L225 Difference]: With dead ends: 54 [2020-10-23 20:27:11,246 INFO L226 Difference]: Without dead ends: 48 [2020-10-23 20:27:11,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2020-10-23 20:27:11,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-23 20:27:11,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-10-23 20:27:11,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-23 20:27:11,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-10-23 20:27:11,262 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 43 [2020-10-23 20:27:11,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:11,263 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-10-23 20:27:11,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 20:27:11,263 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-10-23 20:27:11,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-23 20:27:11,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:11,264 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 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] [2020-10-23 20:27:11,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 20:27:11,265 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:11,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:11,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1818492638, now seen corresponding path program 3 times [2020-10-23 20:27:11,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:11,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413057948] [2020-10-23 20:27:11,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:11,269 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:11,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:11,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:11,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:11,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:27:11,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:11,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:11,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:11,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:11,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:11,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:11,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:11,566 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-23 20:27:11,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [413057948] [2020-10-23 20:27:11,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:11,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-23 20:27:11,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818934987] [2020-10-23 20:27:11,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 20:27:11,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:11,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 20:27:11,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-23 20:27:11,569 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 12 states. [2020-10-23 20:27:12,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:12,389 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2020-10-23 20:27:12,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-23 20:27:12,390 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2020-10-23 20:27:12,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:12,391 INFO L225 Difference]: With dead ends: 54 [2020-10-23 20:27:12,391 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 20:27:12,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2020-10-23 20:27:12,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 20:27:12,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 20:27:12,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 20:27:12,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 20:27:12,393 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 52 [2020-10-23 20:27:12,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:12,394 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 20:27:12,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 20:27:12,394 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 20:27:12,394 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 20:27:12,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 20:27:12,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 20:27:13,069 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 28 [2020-10-23 20:27:13,270 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 28 [2020-10-23 20:27:13,413 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 21 [2020-10-23 20:27:13,779 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 24 [2020-10-23 20:27:13,786 INFO L277 CegarLoopResult]: At program point reach_errorEXIT(line 4) the Hoare annotation is: true [2020-10-23 20:27:13,786 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 4) the Hoare annotation is: true [2020-10-23 20:27:13,786 INFO L277 CegarLoopResult]: At program point reach_errorFINAL(line 4) the Hoare annotation is: true [2020-10-23 20:27:13,787 INFO L277 CegarLoopResult]: At program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) the Hoare annotation is: true [2020-10-23 20:27:13,787 INFO L277 CegarLoopResult]: At program point L4-3(line 4) the Hoare annotation is: true [2020-10-23 20:27:13,787 INFO L277 CegarLoopResult]: At program point L4-4(line 4) the Hoare annotation is: true [2020-10-23 20:27:13,787 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 20:27:13,787 INFO L277 CegarLoopResult]: At program point L-1-1(line -1) the Hoare annotation is: true [2020-10-23 20:27:13,787 INFO L277 CegarLoopResult]: At program point ULTIMATE.initFINAL(line 4) the Hoare annotation is: true [2020-10-23 20:27:13,788 INFO L270 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|)) [2020-10-23 20:27:13,788 INFO L277 CegarLoopResult]: At program point L4(line 4) the Hoare annotation is: true [2020-10-23 20:27:13,788 INFO L277 CegarLoopResult]: At program point L4-1(line 4) the Hoare annotation is: true [2020-10-23 20:27:13,788 INFO L277 CegarLoopResult]: At program point L4-2(line 4) the Hoare annotation is: true [2020-10-23 20:27:13,788 INFO L277 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-10-23 20:27:13,788 INFO L277 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-10-23 20:27:13,789 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 20:27:13,789 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 20:27:13,789 INFO L277 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-10-23 20:27:13,789 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 13 19) the Hoare annotation is: true [2020-10-23 20:27:13,789 INFO L277 CegarLoopResult]: At program point mainEXIT(lines 13 19) the Hoare annotation is: true [2020-10-23 20:27:13,789 INFO L270 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: false [2020-10-23 20:27:13,790 INFO L270 CegarLoopResult]: At program point L16(lines 16 18) the Hoare annotation is: (and (<= main_~result~0 2) (< 0 (+ (div main_~result~0 4294967296) 1))) [2020-10-23 20:27:13,790 INFO L270 CegarLoopResult]: At program point L17-1(line 17) the Hoare annotation is: false [2020-10-23 20:27:13,790 INFO L277 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-10-23 20:27:13,790 INFO L277 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: true [2020-10-23 20:27:13,790 INFO L270 CegarLoopResult]: At program point L15-1(line 15) the Hoare annotation is: (or (and (<= 1 |main_#t~ret9|) (<= |main_#t~ret9| 1)) (and (<= |main_#t~ret9| 2) (<= 2 |main_#t~ret9|)) (= |main_#t~ret9| 0)) [2020-10-23 20:27:13,790 INFO L277 CegarLoopResult]: At program point L16-2(lines 13 19) the Hoare annotation is: true [2020-10-23 20:27:13,790 INFO L270 CegarLoopResult]: At program point L15-2(line 15) the Hoare annotation is: (let ((.cse0 (< 0 (+ (div main_~result~0 4294967296) 1)))) (or (and (<= 1 |main_#t~ret9|) (<= main_~result~0 1) (<= |main_#t~ret9| 1) .cse0) (and (= main_~result~0 0) (= |main_#t~ret9| 0)) (and (<= main_~result~0 2) (<= |main_#t~ret9| 2) (<= 2 |main_#t~ret9|) .cse0))) [2020-10-23 20:27:13,791 INFO L270 CegarLoopResult]: At program point idFINAL(lines 6 11) the Hoare annotation is: (let ((.cse0 (and (<= |id_#res| 1) (<= id_~ret~0 1) (<= 1 |id_#res|) (<= 1 id_~ret~0))) (.cse1 (and (<= 0 |id_#res|) (<= |id_#res| 0)))) (and (or (and (<= id_~ret~0 2) (<= 2 id_~ret~0)) (and (<= 3 id_~ret~0) (<= (div id_~ret~0 4294967296) 0)) .cse0 .cse1) (or .cse0 .cse1 (and (<= 2 |id_#res|) (<= |id_#res| 2))))) [2020-10-23 20:27:13,791 INFO L270 CegarLoopResult]: At program point idEXIT(lines 6 11) the Hoare annotation is: (let ((.cse0 (and (<= |id_#res| 1) (<= id_~ret~0 1) (<= 1 |id_#res|) (<= 1 id_~ret~0))) (.cse1 (and (<= 0 |id_#res|) (<= |id_#res| 0)))) (and (or (and (<= id_~ret~0 2) (<= 2 id_~ret~0)) (and (<= 3 id_~ret~0) (<= (div id_~ret~0 4294967296) 0)) .cse0 .cse1) (or .cse0 .cse1 (and (<= 2 |id_#res|) (<= |id_#res| 2))))) [2020-10-23 20:27:13,791 INFO L277 CegarLoopResult]: At program point idENTRY(lines 6 11) the Hoare annotation is: true [2020-10-23 20:27:13,791 INFO L270 CegarLoopResult]: At program point L10(line 10) the Hoare annotation is: (or (and (<= id_~ret~0 2) (<= 2 id_~ret~0)) (and (<= id_~ret~0 1) (<= 1 id_~ret~0))) [2020-10-23 20:27:13,792 INFO L270 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: (or (and (<= id_~ret~0 2) (<= 2 id_~ret~0)) (and (<= 3 id_~ret~0) (<= (div id_~ret~0 4294967296) 0)) (and (<= id_~ret~0 1) (<= 1 id_~ret~0))) [2020-10-23 20:27:13,792 INFO L277 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: true [2020-10-23 20:27:13,792 INFO L270 CegarLoopResult]: At program point L9-1(line 9) the Hoare annotation is: (and (<= 3 id_~ret~0) (<= (div id_~ret~0 4294967296) 0)) [2020-10-23 20:27:13,792 INFO L277 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: true [2020-10-23 20:27:13,792 INFO L270 CegarLoopResult]: At program point L8-1(line 8) the Hoare annotation is: (or (and (<= |id_#t~ret7| 1) (<= 1 |id_#t~ret7|)) (and (<= |id_#t~ret7| 2) (<= 2 |id_#t~ret7|)) (and (<= 0 |id_#t~ret7|) (<= |id_#t~ret7| 0))) [2020-10-23 20:27:13,792 INFO L277 CegarLoopResult]: At program point L7-1(line 7) the Hoare annotation is: true [2020-10-23 20:27:13,793 INFO L270 CegarLoopResult]: At program point L8-2(line 8) the Hoare annotation is: (or (and (<= 3 id_~ret~0) (<= (div id_~ret~0 4294967296) 0) (<= |id_#t~ret7| 2) (<= 2 |id_#t~ret7|)) (and (<= id_~ret~0 2) (<= |id_#t~ret7| 1) (<= 1 |id_#t~ret7|) (<= 2 id_~ret~0)) (and (<= 0 |id_#t~ret7|) (<= id_~ret~0 1) (<= |id_#t~ret7| 0) (<= 1 id_~ret~0))) [2020-10-23 20:27:13,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:27:13 BoogieIcfgContainer [2020-10-23 20:27:13,813 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 20:27:13,815 INFO L168 Benchmark]: Toolchain (without parser) took 8023.32 ms. Allocated memory was 157.3 MB in the beginning and 226.5 MB in the end (delta: 69.2 MB). Free memory was 115.1 MB in the beginning and 148.0 MB in the end (delta: -33.0 MB). Peak memory consumption was 108.3 MB. Max. memory is 8.0 GB. [2020-10-23 20:27:13,818 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 157.3 MB. Free memory is still 131.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 20:27:13,818 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.18 ms. Allocated memory is still 157.3 MB. Free memory was 114.4 MB in the beginning and 140.5 MB in the end (delta: -26.0 MB). Peak memory consumption was 12.7 MB. Max. memory is 8.0 GB. [2020-10-23 20:27:13,820 INFO L168 Benchmark]: Boogie Preprocessor took 34.51 ms. Allocated memory is still 157.3 MB. Free memory was 140.5 MB in the beginning and 138.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 20:27:13,821 INFO L168 Benchmark]: RCFGBuilder took 539.57 ms. Allocated memory is still 157.3 MB. Free memory was 138.8 MB in the beginning and 128.4 MB in the end (delta: 10.4 MB). Peak memory consumption was 11.7 MB. Max. memory is 8.0 GB. [2020-10-23 20:27:13,824 INFO L168 Benchmark]: TraceAbstraction took 7183.61 ms. Allocated memory was 157.3 MB in the beginning and 226.5 MB in the end (delta: 69.2 MB). Free memory was 127.7 MB in the beginning and 148.0 MB in the end (delta: -20.3 MB). Peak memory consumption was 120.6 MB. Max. memory is 8.0 GB. [2020-10-23 20:27:13,829 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 157.3 MB. Free memory is still 131.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 253.18 ms. Allocated memory is still 157.3 MB. Free memory was 114.4 MB in the beginning and 140.5 MB in the end (delta: -26.0 MB). Peak memory consumption was 12.7 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.51 ms. Allocated memory is still 157.3 MB. Free memory was 140.5 MB in the beginning and 138.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 539.57 ms. Allocated memory is still 157.3 MB. Free memory was 138.8 MB in the beginning and 128.4 MB in the end (delta: 10.4 MB). Peak memory consumption was 11.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7183.61 ms. Allocated memory was 157.3 MB in the beginning and 226.5 MB in the end (delta: 69.2 MB). Free memory was 127.7 MB in the beginning and 148.0 MB in the end (delta: -20.3 MB). Peak memory consumption was 120.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: 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 - ProcedureContractResult [Line: 4]: Procedure Contract for reach_error Derived contract for procedure reach_error: 1 - ProcedureContractResult [Line: 13]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 6]: Procedure Contract for id Derived contract for procedure id: ((((ret <= 2 && 2 <= ret) || (3 <= ret && ret / 4294967296 <= 0)) || (((\result <= 1 && ret <= 1) && 1 <= \result) && 1 <= ret)) || (0 <= \result && \result <= 0)) && (((((\result <= 1 && ret <= 1) && 1 <= \result) && 1 <= ret) || (0 <= \result && \result <= 0)) || (2 <= \result && \result <= 2)) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.6s, OverallIterations: 6, TraceHistogramMax: 4, AutomataDifference: 3.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 183 SDtfs, 189 SDslu, 556 SDs, 0 SdLazy, 887 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 143 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 3.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=5, 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, 6 MinimizatonAttempts, 8 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 39 LocationsWithAnnotation, 70 PreInvPairs, 130 NumberOfFragments, 374 HoareAnnotationTreeSize, 70 FomulaSimplifications, 6276 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 39 FomulaSimplificationsInter, 1398 FormulaSimplificationTreeSizeReductionInter, 1.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...