/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/recursive-simple/fibo_2calls_4-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 00:52:10,961 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 00:52:10,965 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 00:52:11,006 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 00:52:11,006 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 00:52:11,008 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 00:52:11,010 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 00:52:11,012 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 00:52:11,014 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 00:52:11,015 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 00:52:11,016 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 00:52:11,018 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 00:52:11,018 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 00:52:11,020 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 00:52:11,021 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 00:52:11,022 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 00:52:11,023 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 00:52:11,025 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 00:52:11,045 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 00:52:11,059 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 00:52:11,063 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 00:52:11,070 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 00:52:11,072 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 00:52:11,073 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 00:52:11,076 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-24 00:52:11,085 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 00:52:11,086 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 00:52:11,087 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 00:52:11,088 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-24 00:52:11,100 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 00:52:11,101 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 00:52:11,102 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 00:52:11,102 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 00:52:11,103 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 00:52:11,103 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 00:52:11,103 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 00:52:11,103 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 00:52:11,104 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 00:52:11,104 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 00:52:11,104 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 00:52:11,104 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 00:52:11,104 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 00:52:11,105 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 00:52:11,105 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 00:52:11,105 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 00:52:11,105 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 00:52:11,106 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 00:52:11,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 00:52:11,106 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 00:52:11,106 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 00:52:11,107 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 00:52:11,107 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 00:52:11,474 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 00:52:11,505 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 00:52:11,508 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 00:52:11,509 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 00:52:11,510 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 00:52:11,511 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_4-2.c [2020-10-24 00:52:11,578 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67135fcf3/94591d58cc4b416b94fc630afd74bd15/FLAGfc8526154 [2020-10-24 00:52:12,225 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 00:52:12,226 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_4-2.c [2020-10-24 00:52:12,234 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67135fcf3/94591d58cc4b416b94fc630afd74bd15/FLAGfc8526154 [2020-10-24 00:52:12,576 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67135fcf3/94591d58cc4b416b94fc630afd74bd15 [2020-10-24 00:52:12,580 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 00:52:12,588 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 00:52:12,592 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 00:52:12,593 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 00:52:12,597 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 00:52:12,598 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:52:12" (1/1) ... [2020-10-24 00:52:12,601 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c5f405b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:52:12, skipping insertion in model container [2020-10-24 00:52:12,601 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:52:12" (1/1) ... [2020-10-24 00:52:12,610 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 00:52:12,624 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 00:52:12,803 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 00:52:12,815 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 00:52:12,834 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 00:52:12,851 INFO L208 MainTranslator]: Completed translation [2020-10-24 00:52:12,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:52:12 WrapperNode [2020-10-24 00:52:12,852 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 00:52:12,854 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 00:52:12,854 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 00:52:12,854 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 00:52:12,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:52:12" (1/1) ... [2020-10-24 00:52:12,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:52:12" (1/1) ... [2020-10-24 00:52:12,881 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:52:12" (1/1) ... [2020-10-24 00:52:12,882 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:52:12" (1/1) ... [2020-10-24 00:52:12,888 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:52:12" (1/1) ... [2020-10-24 00:52:12,890 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:52:12" (1/1) ... [2020-10-24 00:52:12,892 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:52:12" (1/1) ... [2020-10-24 00:52:12,894 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 00:52:12,895 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 00:52:12,896 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 00:52:12,896 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 00:52:12,897 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:52:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 00:52:12,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 00:52:12,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 00:52:12,996 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 00:52:12,996 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-10-24 00:52:12,997 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-10-24 00:52:12,997 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 00:52:12,997 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-24 00:52:12,997 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 00:52:12,998 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 00:52:12,998 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 00:52:12,998 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 00:52:12,998 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-10-24 00:52:12,998 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-10-24 00:52:12,998 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 00:52:12,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 00:52:12,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 00:52:12,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 00:52:12,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 00:52:12,999 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 00:52:13,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 00:52:13,380 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 00:52:13,381 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-24 00:52:13,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:52:13 BoogieIcfgContainer [2020-10-24 00:52:13,383 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 00:52:13,385 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 00:52:13,385 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 00:52:13,388 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 00:52:13,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:52:12" (1/3) ... [2020-10-24 00:52:13,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b7d5831 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:52:13, skipping insertion in model container [2020-10-24 00:52:13,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:52:12" (2/3) ... [2020-10-24 00:52:13,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b7d5831 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:52:13, skipping insertion in model container [2020-10-24 00:52:13,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:52:13" (3/3) ... [2020-10-24 00:52:13,392 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-2.c [2020-10-24 00:52:13,406 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 00:52:13,412 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 00:52:13,427 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 00:52:13,453 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 00:52:13,454 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 00:52:13,454 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 00:52:13,454 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 00:52:13,454 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 00:52:13,454 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 00:52:13,454 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 00:52:13,455 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 00:52:13,474 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2020-10-24 00:52:13,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-24 00:52:13,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:52:13,485 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] [2020-10-24 00:52:13,486 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:52:13,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:52:13,492 INFO L82 PathProgramCache]: Analyzing trace with hash 775886402, now seen corresponding path program 1 times [2020-10-24 00:52:13,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:52:13,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368688921] [2020-10-24 00:52:13,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:52:13,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:13,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:52:13,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:14,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-24 00:52:14,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:14,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 00:52:14,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368688921] [2020-10-24 00:52:14,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 00:52:14,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-24 00:52:14,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132600616] [2020-10-24 00:52:14,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 00:52:14,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:52:14,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 00:52:14,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-24 00:52:14,073 INFO L87 Difference]: Start difference. First operand 57 states. Second operand 6 states. [2020-10-24 00:52:14,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:52:14,796 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2020-10-24 00:52:14,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-24 00:52:14,798 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-24 00:52:14,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:52:14,810 INFO L225 Difference]: With dead ends: 74 [2020-10-24 00:52:14,810 INFO L226 Difference]: Without dead ends: 51 [2020-10-24 00:52:14,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-24 00:52:14,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-24 00:52:14,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-24 00:52:14,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-24 00:52:14,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2020-10-24 00:52:14,885 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 25 [2020-10-24 00:52:14,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:52:14,886 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2020-10-24 00:52:14,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 00:52:14,886 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2020-10-24 00:52:14,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-24 00:52:14,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:52:14,889 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] [2020-10-24 00:52:14,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 00:52:14,890 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:52:14,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:52:14,891 INFO L82 PathProgramCache]: Analyzing trace with hash 478831265, now seen corresponding path program 1 times [2020-10-24 00:52:14,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:52:14,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118592943] [2020-10-24 00:52:14,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:52:14,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:15,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:52:15,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:15,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-24 00:52:15,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:15,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 00:52:15,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118592943] [2020-10-24 00:52:15,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 00:52:15,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-24 00:52:15,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258147516] [2020-10-24 00:52:15,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 00:52:15,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:52:15,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 00:52:15,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-24 00:52:15,092 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 6 states. [2020-10-24 00:52:15,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:52:15,709 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-10-24 00:52:15,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-24 00:52:15,710 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-24 00:52:15,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:52:15,713 INFO L225 Difference]: With dead ends: 60 [2020-10-24 00:52:15,713 INFO L226 Difference]: Without dead ends: 53 [2020-10-24 00:52:15,714 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 [2020-10-24 00:52:15,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-24 00:52:15,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2020-10-24 00:52:15,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-24 00:52:15,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2020-10-24 00:52:15,735 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 26 [2020-10-24 00:52:15,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:52:15,735 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2020-10-24 00:52:15,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 00:52:15,735 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2020-10-24 00:52:15,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-24 00:52:15,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:52:15,738 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 00:52:15,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 00:52:15,742 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:52:15,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:52:15,743 INFO L82 PathProgramCache]: Analyzing trace with hash -708858972, now seen corresponding path program 1 times [2020-10-24 00:52:15,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:52:15,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709591610] [2020-10-24 00:52:15,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:52:15,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:15,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:52:15,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:15,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-24 00:52:15,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:15,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-24 00:52:15,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:16,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-24 00:52:16,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:16,030 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-24 00:52:16,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709591610] [2020-10-24 00:52:16,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:52:16,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-24 00:52:16,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367642344] [2020-10-24 00:52:16,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-24 00:52:16,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:52:16,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-24 00:52:16,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-24 00:52:16,040 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 7 states. [2020-10-24 00:52:16,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:52:16,404 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2020-10-24 00:52:16,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-24 00:52:16,404 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-10-24 00:52:16,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:52:16,407 INFO L225 Difference]: With dead ends: 92 [2020-10-24 00:52:16,407 INFO L226 Difference]: Without dead ends: 55 [2020-10-24 00:52:16,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-24 00:52:16,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-24 00:52:16,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2020-10-24 00:52:16,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-24 00:52:16,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2020-10-24 00:52:16,427 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 42 [2020-10-24 00:52:16,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:52:16,428 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2020-10-24 00:52:16,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-24 00:52:16,428 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2020-10-24 00:52:16,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-24 00:52:16,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:52:16,430 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 00:52:16,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 00:52:16,431 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:52:16,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:52:16,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1629720462, now seen corresponding path program 1 times [2020-10-24 00:52:16,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:52:16,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342414665] [2020-10-24 00:52:16,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:52:16,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:16,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:52:16,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:16,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-24 00:52:16,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:16,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-24 00:52:16,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:16,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-24 00:52:16,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:16,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-24 00:52:16,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342414665] [2020-10-24 00:52:16,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:52:16,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-24 00:52:16,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804212468] [2020-10-24 00:52:16,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-24 00:52:16,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:52:16,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-24 00:52:16,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-24 00:52:16,592 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 8 states. [2020-10-24 00:52:17,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:52:17,116 INFO L93 Difference]: Finished difference Result 84 states and 104 transitions. [2020-10-24 00:52:17,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-24 00:52:17,117 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2020-10-24 00:52:17,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:52:17,120 INFO L225 Difference]: With dead ends: 84 [2020-10-24 00:52:17,120 INFO L226 Difference]: Without dead ends: 77 [2020-10-24 00:52:17,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-10-24 00:52:17,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-24 00:52:17,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2020-10-24 00:52:17,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-24 00:52:17,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2020-10-24 00:52:17,145 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 43 [2020-10-24 00:52:17,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:52:17,145 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2020-10-24 00:52:17,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-24 00:52:17,146 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2020-10-24 00:52:17,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-24 00:52:17,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:52:17,149 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 00:52:17,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 00:52:17,149 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:52:17,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:52:17,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1688308117, now seen corresponding path program 1 times [2020-10-24 00:52:17,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:52:17,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349100195] [2020-10-24 00:52:17,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:52:17,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:17,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:52:17,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:17,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-24 00:52:17,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:17,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-24 00:52:17,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:17,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-24 00:52:17,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:17,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-24 00:52:17,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:17,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-24 00:52:17,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:17,330 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-24 00:52:17,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349100195] [2020-10-24 00:52:17,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:52:17,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-24 00:52:17,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45148687] [2020-10-24 00:52:17,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-24 00:52:17,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:52:17,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-24 00:52:17,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-24 00:52:17,334 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand 7 states. [2020-10-24 00:52:17,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:52:17,628 INFO L93 Difference]: Finished difference Result 140 states and 188 transitions. [2020-10-24 00:52:17,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-24 00:52:17,628 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-10-24 00:52:17,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:52:17,633 INFO L225 Difference]: With dead ends: 140 [2020-10-24 00:52:17,633 INFO L226 Difference]: Without dead ends: 79 [2020-10-24 00:52:17,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-24 00:52:17,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-24 00:52:17,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-24 00:52:17,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-24 00:52:17,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 98 transitions. [2020-10-24 00:52:17,668 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 98 transitions. Word has length 59 [2020-10-24 00:52:17,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:52:17,669 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 98 transitions. [2020-10-24 00:52:17,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-24 00:52:17,669 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 98 transitions. [2020-10-24 00:52:17,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-24 00:52:17,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:52:17,672 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 00:52:17,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-24 00:52:17,673 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:52:17,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:52:17,673 INFO L82 PathProgramCache]: Analyzing trace with hash -439427312, now seen corresponding path program 1 times [2020-10-24 00:52:17,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:52:17,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971245806] [2020-10-24 00:52:17,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:52:17,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:17,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:52:17,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:17,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-24 00:52:17,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:17,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-24 00:52:17,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:17,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-24 00:52:17,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:17,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-24 00:52:17,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:17,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-24 00:52:17,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:17,833 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 00:52:17,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971245806] [2020-10-24 00:52:17,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:52:17,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-24 00:52:17,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342217391] [2020-10-24 00:52:17,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-24 00:52:17,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:52:17,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-24 00:52:17,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-24 00:52:17,836 INFO L87 Difference]: Start difference. First operand 79 states and 98 transitions. Second operand 8 states. [2020-10-24 00:52:18,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:52:18,273 INFO L93 Difference]: Finished difference Result 152 states and 207 transitions. [2020-10-24 00:52:18,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-24 00:52:18,274 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 60 [2020-10-24 00:52:18,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:52:18,277 INFO L225 Difference]: With dead ends: 152 [2020-10-24 00:52:18,277 INFO L226 Difference]: Without dead ends: 87 [2020-10-24 00:52:18,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-24 00:52:18,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-24 00:52:18,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 81. [2020-10-24 00:52:18,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-24 00:52:18,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 101 transitions. [2020-10-24 00:52:18,303 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 101 transitions. Word has length 60 [2020-10-24 00:52:18,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:52:18,304 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 101 transitions. [2020-10-24 00:52:18,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-24 00:52:18,304 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 101 transitions. [2020-10-24 00:52:18,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-24 00:52:18,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:52:18,306 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 00:52:18,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-24 00:52:18,307 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:52:18,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:52:18,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1841264646, now seen corresponding path program 1 times [2020-10-24 00:52:18,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:52:18,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155740482] [2020-10-24 00:52:18,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:52:18,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:18,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:52:18,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:18,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-24 00:52:18,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:18,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-24 00:52:18,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:18,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-24 00:52:18,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:18,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-24 00:52:18,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:18,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-24 00:52:18,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:18,469 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-24 00:52:18,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155740482] [2020-10-24 00:52:18,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:52:18,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-24 00:52:18,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805433835] [2020-10-24 00:52:18,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-24 00:52:18,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:52:18,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-24 00:52:18,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-24 00:52:18,472 INFO L87 Difference]: Start difference. First operand 81 states and 101 transitions. Second operand 9 states. [2020-10-24 00:52:19,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:52:19,095 INFO L93 Difference]: Finished difference Result 128 states and 168 transitions. [2020-10-24 00:52:19,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-24 00:52:19,097 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-10-24 00:52:19,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:52:19,103 INFO L225 Difference]: With dead ends: 128 [2020-10-24 00:52:19,104 INFO L226 Difference]: Without dead ends: 121 [2020-10-24 00:52:19,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-24 00:52:19,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-24 00:52:19,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 115. [2020-10-24 00:52:19,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-24 00:52:19,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 154 transitions. [2020-10-24 00:52:19,168 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 154 transitions. Word has length 61 [2020-10-24 00:52:19,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:52:19,170 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 154 transitions. [2020-10-24 00:52:19,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-24 00:52:19,170 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 154 transitions. [2020-10-24 00:52:19,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-24 00:52:19,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:52:19,174 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 00:52:19,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-24 00:52:19,175 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:52:19,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:52:19,176 INFO L82 PathProgramCache]: Analyzing trace with hash 942662771, now seen corresponding path program 1 times [2020-10-24 00:52:19,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:52:19,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935370721] [2020-10-24 00:52:19,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:52:19,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:19,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:52:19,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:19,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-24 00:52:19,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:19,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-24 00:52:19,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:19,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-24 00:52:19,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:19,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-24 00:52:19,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:19,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-24 00:52:19,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:19,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-24 00:52:19,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:19,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-24 00:52:19,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:19,485 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-24 00:52:19,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935370721] [2020-10-24 00:52:19,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:52:19,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-24 00:52:19,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000448786] [2020-10-24 00:52:19,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-24 00:52:19,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:52:19,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-24 00:52:19,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-24 00:52:19,499 INFO L87 Difference]: Start difference. First operand 115 states and 154 transitions. Second operand 9 states. [2020-10-24 00:52:20,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:52:20,099 INFO L93 Difference]: Finished difference Result 237 states and 358 transitions. [2020-10-24 00:52:20,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-24 00:52:20,101 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 78 [2020-10-24 00:52:20,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:52:20,106 INFO L225 Difference]: With dead ends: 237 [2020-10-24 00:52:20,106 INFO L226 Difference]: Without dead ends: 136 [2020-10-24 00:52:20,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-10-24 00:52:20,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-24 00:52:20,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 124. [2020-10-24 00:52:20,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-24 00:52:20,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 170 transitions. [2020-10-24 00:52:20,183 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 170 transitions. Word has length 78 [2020-10-24 00:52:20,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:52:20,184 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 170 transitions. [2020-10-24 00:52:20,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-24 00:52:20,184 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 170 transitions. [2020-10-24 00:52:20,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-24 00:52:20,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:52:20,189 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 00:52:20,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-24 00:52:20,189 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:52:20,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:52:20,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1118264142, now seen corresponding path program 1 times [2020-10-24 00:52:20,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:52:20,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820410030] [2020-10-24 00:52:20,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:52:20,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:20,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:52:20,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:20,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-24 00:52:20,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:20,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-24 00:52:20,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:20,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-24 00:52:20,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:20,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-24 00:52:20,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:20,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-24 00:52:20,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:20,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-24 00:52:20,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:20,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-24 00:52:20,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:20,455 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-24 00:52:20,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820410030] [2020-10-24 00:52:20,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:52:20,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-24 00:52:20,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91446965] [2020-10-24 00:52:20,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-24 00:52:20,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:52:20,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-24 00:52:20,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-24 00:52:20,459 INFO L87 Difference]: Start difference. First operand 124 states and 170 transitions. Second operand 11 states. [2020-10-24 00:52:21,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:52:21,140 INFO L93 Difference]: Finished difference Result 267 states and 410 transitions. [2020-10-24 00:52:21,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-24 00:52:21,140 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 79 [2020-10-24 00:52:21,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:52:21,143 INFO L225 Difference]: With dead ends: 267 [2020-10-24 00:52:21,144 INFO L226 Difference]: Without dead ends: 160 [2020-10-24 00:52:21,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-24 00:52:21,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-24 00:52:21,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 142. [2020-10-24 00:52:21,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-24 00:52:21,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 200 transitions. [2020-10-24 00:52:21,181 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 200 transitions. Word has length 79 [2020-10-24 00:52:21,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:52:21,181 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 200 transitions. [2020-10-24 00:52:21,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-24 00:52:21,181 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 200 transitions. [2020-10-24 00:52:21,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-24 00:52:21,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:52:21,184 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-24 00:52:21,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-24 00:52:21,185 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:52:21,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:52:21,185 INFO L82 PathProgramCache]: Analyzing trace with hash -443839068, now seen corresponding path program 2 times [2020-10-24 00:52:21,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:52:21,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169455016] [2020-10-24 00:52:21,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:52:21,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:21,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:52:21,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:21,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-24 00:52:21,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:21,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-24 00:52:21,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:21,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-24 00:52:21,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:21,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-24 00:52:21,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:21,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-24 00:52:21,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:21,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-24 00:52:21,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:21,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-24 00:52:21,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:21,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-24 00:52:21,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:21,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-24 00:52:21,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:21,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-24 00:52:21,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:21,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-24 00:52:21,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:52:21,498 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 59 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-10-24 00:52:21,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169455016] [2020-10-24 00:52:21,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:52:21,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-24 00:52:21,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366743288] [2020-10-24 00:52:21,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-24 00:52:21,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:52:21,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-24 00:52:21,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-24 00:52:21,501 INFO L87 Difference]: Start difference. First operand 142 states and 200 transitions. Second operand 13 states. [2020-10-24 00:52:22,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:52:22,756 INFO L93 Difference]: Finished difference Result 275 states and 430 transitions. [2020-10-24 00:52:22,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-24 00:52:22,757 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 114 [2020-10-24 00:52:22,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:52:22,766 INFO L225 Difference]: With dead ends: 275 [2020-10-24 00:52:22,766 INFO L226 Difference]: Without dead ends: 125 [2020-10-24 00:52:22,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2020-10-24 00:52:22,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-24 00:52:22,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 112. [2020-10-24 00:52:22,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-24 00:52:22,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 136 transitions. [2020-10-24 00:52:22,804 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 136 transitions. Word has length 114 [2020-10-24 00:52:22,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:52:22,804 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 136 transitions. [2020-10-24 00:52:22,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-24 00:52:22,804 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 136 transitions. [2020-10-24 00:52:22,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-24 00:52:22,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:52:22,806 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2020-10-24 00:52:22,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-24 00:52:22,807 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:52:22,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:52:22,807 INFO L82 PathProgramCache]: Analyzing trace with hash 693727952, now seen corresponding path program 1 times [2020-10-24 00:52:22,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:52:22,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671627606] [2020-10-24 00:52:22,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:52:22,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 00:52:22,831 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 00:52:22,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 00:52:22,851 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 00:52:22,899 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-24 00:52:22,899 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 00:52:22,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-24 00:52:23,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 12:52:23 BoogieIcfgContainer [2020-10-24 00:52:23,007 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 00:52:23,010 INFO L168 Benchmark]: Toolchain (without parser) took 10426.90 ms. Allocated memory was 151.0 MB in the beginning and 270.5 MB in the end (delta: 119.5 MB). Free memory was 127.8 MB in the beginning and 109.9 MB in the end (delta: 18.0 MB). Peak memory consumption was 137.9 MB. Max. memory is 8.0 GB. [2020-10-24 00:52:23,011 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 151.0 MB. Free memory is still 125.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-24 00:52:23,012 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.21 ms. Allocated memory is still 151.0 MB. Free memory was 127.2 MB in the beginning and 117.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-24 00:52:23,013 INFO L168 Benchmark]: Boogie Preprocessor took 41.09 ms. Allocated memory is still 151.0 MB. Free memory was 117.8 MB in the beginning and 116.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-24 00:52:23,014 INFO L168 Benchmark]: RCFGBuilder took 487.46 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 132.4 MB in the end (delta: -16.1 MB). Peak memory consumption was 17.3 MB. Max. memory is 8.0 GB. [2020-10-24 00:52:23,015 INFO L168 Benchmark]: TraceAbstraction took 9622.53 ms. Allocated memory was 151.0 MB in the beginning and 270.5 MB in the end (delta: 119.5 MB). Free memory was 131.9 MB in the beginning and 109.9 MB in the end (delta: 22.0 MB). Peak memory consumption was 141.6 MB. Max. memory is 8.0 GB. [2020-10-24 00:52:23,020 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 151.0 MB. Free memory is still 125.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 260.21 ms. Allocated memory is still 151.0 MB. Free memory was 127.2 MB in the beginning and 117.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.09 ms. Allocated memory is still 151.0 MB. Free memory was 117.8 MB in the beginning and 116.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 487.46 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 132.4 MB in the end (delta: -16.1 MB). Peak memory consumption was 17.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 9622.53 ms. Allocated memory was 151.0 MB in the beginning and 270.5 MB in the end (delta: 119.5 MB). Free memory was 131.9 MB in the beginning and 109.9 MB in the end (delta: 22.0 MB). Peak memory consumption was 141.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L38] int x = 4; VAL [x=4] [L39] CALL, EXPR fibo1(x) VAL [\old(n)=4] [L10] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L12] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L20] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L22] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 VAL [\old(n)=0, n=0] [L21] return 0; VAL [\old(n)=0, \result=0, n=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L15] return fibo2(n-1) + fibo2(n-2); VAL [\old(n)=2, \result=1, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L25] return fibo1(n-1) + fibo1(n-2); VAL [\old(n)=3, \result=2, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=4, fibo2(n-1)=2, n=4] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 VAL [\old(n)=0, n=0] [L11] return 0; VAL [\old(n)=0, \result=0, n=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L25] return fibo1(n-1) + fibo1(n-2); VAL [\old(n)=2, \result=1, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=4, fibo2(n-1)=2, fibo2(n-2)=1, n=4] [L15] return fibo2(n-1) + fibo2(n-2); VAL [\old(n)=4, \result=3, fibo2(n-1)=2, fibo2(n-2)=1, n=4] [L39] RET, EXPR fibo1(x) VAL [fibo1(x)=3, x=4] [L39] int result = fibo1(x); VAL [fibo1(x)=3, result=3, x=4] [L40] COND TRUE result == 3 VAL [result=3, x=4] [L41] CALL reach_error() [L4] __assert_fail("0", "fibo_2calls_4-2.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 57 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.4s, OverallIterations: 11, TraceHistogramMax: 6, AutomataDifference: 6.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 506 SDtfs, 742 SDslu, 851 SDs, 0 SdLazy, 2356 SolverSat, 303 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 283 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 3.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=142occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 10 MinimizatonAttempts, 61 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 683 NumberOfCodeBlocks, 683 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 577 ConstructedInterpolants, 0 QuantifiedInterpolants, 86657 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 207/306 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...