/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_4-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:15:30,503 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:15:30,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:15:30,542 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-06 22:15:30,555 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:15:30,557 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:15:30,558 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:15:30,560 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:15:30,561 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:15:30,571 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:15:30,573 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:15:30,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:15:30,578 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:15:30,582 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:15:30,584 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:15:30,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:15:30,588 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 22:15:30,598 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:15:30,599 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:15:30,600 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:15:30,602 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-06 22:15:30,630 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:15:30,631 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:15:30,632 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:15:30,633 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:15:30,633 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:15:30,633 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:15:30,633 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:15:30,634 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:15:30,634 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:15:30,634 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:15:30,634 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:15:30,634 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:15:30,635 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:15:30,635 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:15:30,635 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:15:30,635 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:15:30,635 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:15:30,636 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:15:30,636 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:15:30,636 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:15:30,636 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:15:30,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:15:30,637 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:15:30,637 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:15:30,637 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:15:30,637 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:15:30,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:15:30,638 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:15:30,638 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:15:30,638 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:15:30,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:15:31,022 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:15:31,025 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:15:31,026 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:15:31,027 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:15:31,028 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_4-1.c [2020-11-06 22:15:31,106 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b9987410/b8fc39b8d39749d3959d7acbf380506a/FLAGd71e21f44 [2020-11-06 22:15:31,672 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:15:31,673 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_4-1.c [2020-11-06 22:15:31,681 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b9987410/b8fc39b8d39749d3959d7acbf380506a/FLAGd71e21f44 [2020-11-06 22:15:32,046 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b9987410/b8fc39b8d39749d3959d7acbf380506a [2020-11-06 22:15:32,049 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:15:32,057 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:15:32,061 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:15:32,061 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:15:32,065 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:15:32,066 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:15:32" (1/1) ... [2020-11-06 22:15:32,070 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1677d6a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:32, skipping insertion in model container [2020-11-06 22:15:32,070 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:15:32" (1/1) ... [2020-11-06 22:15:32,079 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:15:32,094 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:15:32,261 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:15:32,274 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:15:32,294 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:15:32,314 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:15:32,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:32 WrapperNode [2020-11-06 22:15:32,314 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:15:32,316 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:15:32,316 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:15:32,316 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:15:32,331 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:32" (1/1) ... [2020-11-06 22:15:32,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:32" (1/1) ... [2020-11-06 22:15:32,340 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:32" (1/1) ... [2020-11-06 22:15:32,341 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:32" (1/1) ... [2020-11-06 22:15:32,350 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:32" (1/1) ... [2020-11-06 22:15:32,357 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:32" (1/1) ... [2020-11-06 22:15:32,359 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:32" (1/1) ... [2020-11-06 22:15:32,361 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:15:32,362 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:15:32,362 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:15:32,363 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:15:32,364 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:32" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:15:32,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:15:32,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:15:32,451 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:15:32,451 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-11-06 22:15:32,451 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-11-06 22:15:32,452 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:15:32,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:15:32,453 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:15:32,454 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:15:32,454 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:15:32,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:15:32,455 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-11-06 22:15:32,456 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-11-06 22:15:32,457 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:15:32,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:15:32,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:15:32,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:15:32,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:15:32,459 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:15:32,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:15:32,859 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:15:32,860 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-06 22:15:32,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:15:32 BoogieIcfgContainer [2020-11-06 22:15:32,862 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:15:32,865 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:15:32,865 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:15:32,869 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:15:32,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:15:32" (1/3) ... [2020-11-06 22:15:32,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68cdb1b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:15:32, skipping insertion in model container [2020-11-06 22:15:32,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:32" (2/3) ... [2020-11-06 22:15:32,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68cdb1b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:15:32, skipping insertion in model container [2020-11-06 22:15:32,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:15:32" (3/3) ... [2020-11-06 22:15:32,874 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-1.c [2020-11-06 22:15:32,894 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:15:32,898 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:15:32,913 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:15:32,974 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:15:32,977 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:15:32,977 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:15:32,977 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:15:32,978 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:15:32,978 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:15:32,978 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:15:32,978 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:15:33,008 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-11-06 22:15:33,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-06 22:15:33,019 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:15:33,020 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:15:33,020 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:15:33,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:15:33,036 INFO L82 PathProgramCache]: Analyzing trace with hash 219823047, now seen corresponding path program 1 times [2020-11-06 22:15:33,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:15:33,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229286491] [2020-11-06 22:15:33,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:15:33,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:33,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:15:33,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:33,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:15:33,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:33,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:15:33,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229286491] [2020-11-06 22:15:33,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:15:33,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:15:33,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714306679] [2020-11-06 22:15:33,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:15:33,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:15:33,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:15:33,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:15:33,499 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 6 states. [2020-11-06 22:15:33,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:15:33,893 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2020-11-06 22:15:33,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:15:33,895 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-11-06 22:15:33,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:15:33,907 INFO L225 Difference]: With dead ends: 50 [2020-11-06 22:15:33,907 INFO L226 Difference]: Without dead ends: 32 [2020-11-06 22:15:33,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:15:33,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-06 22:15:34,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-11-06 22:15:34,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-06 22:15:34,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-11-06 22:15:34,038 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 15 [2020-11-06 22:15:34,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:15:34,043 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-11-06 22:15:34,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:15:34,043 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-11-06 22:15:34,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-06 22:15:34,049 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:15:34,049 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:15:34,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:15:34,050 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:15:34,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:15:34,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1220716726, now seen corresponding path program 1 times [2020-11-06 22:15:34,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:15:34,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074499499] [2020-11-06 22:15:34,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:15:34,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:34,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:15:34,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:34,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:15:34,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:34,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:15:34,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074499499] [2020-11-06 22:15:34,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:15:34,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:15:34,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369721517] [2020-11-06 22:15:34,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:15:34,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:15:34,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:15:34,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:15:34,236 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 6 states. [2020-11-06 22:15:34,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:15:34,537 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2020-11-06 22:15:34,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:15:34,538 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-11-06 22:15:34,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:15:34,540 INFO L225 Difference]: With dead ends: 39 [2020-11-06 22:15:34,540 INFO L226 Difference]: Without dead ends: 34 [2020-11-06 22:15:34,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:15:34,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-06 22:15:34,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-11-06 22:15:34,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-06 22:15:34,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-11-06 22:15:34,556 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 16 [2020-11-06 22:15:34,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:15:34,557 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-11-06 22:15:34,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:15:34,557 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-11-06 22:15:34,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-06 22:15:34,558 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:15:34,559 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-06 22:15:34,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:15:34,559 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:15:34,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:15:34,560 INFO L82 PathProgramCache]: Analyzing trace with hash 2083135015, now seen corresponding path program 1 times [2020-11-06 22:15:34,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:15:34,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566469297] [2020-11-06 22:15:34,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:15:34,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:34,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:15:34,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:34,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:15:34,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:34,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:15:34,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:34,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-06 22:15:34,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:34,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-06 22:15:34,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566469297] [2020-11-06 22:15:34,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770119482] [2020-11-06 22:15:34,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:15:34,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:34,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-06 22:15:34,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:15:34,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-06 22:15:34,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:15:34,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-11-06 22:15:34,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150206891] [2020-11-06 22:15:34,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-06 22:15:34,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:15:34,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-06 22:15:34,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-11-06 22:15:34,978 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 11 states. [2020-11-06 22:15:35,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:15:35,584 INFO L93 Difference]: Finished difference Result 61 states and 81 transitions. [2020-11-06 22:15:35,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-06 22:15:35,586 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-11-06 22:15:35,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:15:35,590 INFO L225 Difference]: With dead ends: 61 [2020-11-06 22:15:35,590 INFO L226 Difference]: Without dead ends: 36 [2020-11-06 22:15:35,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-11-06 22:15:35,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-06 22:15:35,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-11-06 22:15:35,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-06 22:15:35,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2020-11-06 22:15:35,616 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 28 [2020-11-06 22:15:35,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:15:35,616 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2020-11-06 22:15:35,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-06 22:15:35,617 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2020-11-06 22:15:35,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-06 22:15:35,618 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:15:35,618 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] [2020-11-06 22:15:35,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-06 22:15:35,833 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:15:35,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:15:35,835 INFO L82 PathProgramCache]: Analyzing trace with hash 752879968, now seen corresponding path program 1 times [2020-11-06 22:15:35,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:15:35,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437285550] [2020-11-06 22:15:35,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:15:35,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:35,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:15:35,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:35,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:15:35,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:35,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:15:35,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:36,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:15:36,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:36,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-06 22:15:36,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437285550] [2020-11-06 22:15:36,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477979320] [2020-11-06 22:15:36,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:15:36,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:36,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-06 22:15:36,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:15:36,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-06 22:15:36,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:15:36,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2020-11-06 22:15:36,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638724576] [2020-11-06 22:15:36,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-06 22:15:36,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:15:36,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-06 22:15:36,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-11-06 22:15:36,141 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 10 states. [2020-11-06 22:15:36,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:15:36,794 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2020-11-06 22:15:36,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-06 22:15:36,795 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-11-06 22:15:36,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:15:36,798 INFO L225 Difference]: With dead ends: 57 [2020-11-06 22:15:36,799 INFO L226 Difference]: Without dead ends: 52 [2020-11-06 22:15:36,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-11-06 22:15:36,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-11-06 22:15:36,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-11-06 22:15:36,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-11-06 22:15:36,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions. [2020-11-06 22:15:36,816 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 29 [2020-11-06 22:15:36,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:15:36,816 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions. [2020-11-06 22:15:36,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-06 22:15:36,817 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions. [2020-11-06 22:15:36,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-06 22:15:36,819 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:15:36,819 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] [2020-11-06 22:15:37,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:15:37,033 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:15:37,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:15:37,034 INFO L82 PathProgramCache]: Analyzing trace with hash 2070859795, now seen corresponding path program 1 times [2020-11-06 22:15:37,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:15:37,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422870887] [2020-11-06 22:15:37,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:15:37,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:37,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:15:37,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:37,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:15:37,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:37,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:15:37,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:37,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:15:37,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:37,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-06 22:15:37,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:37,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-11-06 22:15:37,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:37,272 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-06 22:15:37,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422870887] [2020-11-06 22:15:37,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564573454] [2020-11-06 22:15:37,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:15:37,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:37,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-06 22:15:37,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:15:37,461 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-06 22:15:37,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:15:37,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2020-11-06 22:15:37,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907386286] [2020-11-06 22:15:37,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-06 22:15:37,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:15:37,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-06 22:15:37,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-11-06 22:15:37,465 INFO L87 Difference]: Start difference. First operand 50 states and 67 transitions. Second operand 12 states. [2020-11-06 22:15:38,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:15:38,421 INFO L93 Difference]: Finished difference Result 111 states and 173 transitions. [2020-11-06 22:15:38,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-06 22:15:38,423 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-11-06 22:15:38,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:15:38,426 INFO L225 Difference]: With dead ends: 111 [2020-11-06 22:15:38,426 INFO L226 Difference]: Without dead ends: 68 [2020-11-06 22:15:38,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2020-11-06 22:15:38,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-11-06 22:15:38,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-11-06 22:15:38,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-11-06 22:15:38,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 97 transitions. [2020-11-06 22:15:38,447 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 97 transitions. Word has length 41 [2020-11-06 22:15:38,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:15:38,447 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 97 transitions. [2020-11-06 22:15:38,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-06 22:15:38,447 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 97 transitions. [2020-11-06 22:15:38,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-06 22:15:38,450 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:15:38,450 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] [2020-11-06 22:15:38,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:15:38,660 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:15:38,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:15:38,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1960607334, now seen corresponding path program 1 times [2020-11-06 22:15:38,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:15:38,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165387493] [2020-11-06 22:15:38,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:15:38,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:38,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:15:38,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:38,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:15:38,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:38,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:15:38,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:38,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:15:38,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:38,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:15:38,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:38,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:15:38,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:38,831 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-06 22:15:38,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165387493] [2020-11-06 22:15:38,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289941260] [2020-11-06 22:15:38,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:15:38,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:38,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-06 22:15:38,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:15:39,048 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-06 22:15:39,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:15:39,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-11-06 22:15:39,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939078743] [2020-11-06 22:15:39,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-06 22:15:39,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:15:39,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-06 22:15:39,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-11-06 22:15:39,051 INFO L87 Difference]: Start difference. First operand 68 states and 97 transitions. Second operand 14 states. [2020-11-06 22:15:40,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:15:40,548 INFO L93 Difference]: Finished difference Result 183 states and 327 transitions. [2020-11-06 22:15:40,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-06 22:15:40,549 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-11-06 22:15:40,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:15:40,554 INFO L225 Difference]: With dead ends: 183 [2020-11-06 22:15:40,555 INFO L226 Difference]: Without dead ends: 122 [2020-11-06 22:15:40,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2020-11-06 22:15:40,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-11-06 22:15:40,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 108. [2020-11-06 22:15:40,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-11-06 22:15:40,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 171 transitions. [2020-11-06 22:15:40,618 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 171 transitions. Word has length 42 [2020-11-06 22:15:40,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:15:40,619 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 171 transitions. [2020-11-06 22:15:40,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-06 22:15:40,621 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 171 transitions. [2020-11-06 22:15:40,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-06 22:15:40,634 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:15:40,634 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-11-06 22:15:40,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:15:40,851 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:15:40,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:15:40,852 INFO L82 PathProgramCache]: Analyzing trace with hash -751460799, now seen corresponding path program 1 times [2020-11-06 22:15:40,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:15:40,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939459186] [2020-11-06 22:15:40,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:15:40,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:40,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:15:40,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:40,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:15:40,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:40,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:15:40,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:41,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:15:41,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:41,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:15:41,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:41,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:15:41,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:41,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:15:41,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:41,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-06 22:15:41,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:41,107 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-11-06 22:15:41,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939459186] [2020-11-06 22:15:41,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096231547] [2020-11-06 22:15:41,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:15:41,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:41,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-06 22:15:41,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:15:41,336 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-11-06 22:15:41,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:15:41,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2020-11-06 22:15:41,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458792730] [2020-11-06 22:15:41,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-06 22:15:41,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:15:41,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-06 22:15:41,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-11-06 22:15:41,340 INFO L87 Difference]: Start difference. First operand 108 states and 171 transitions. Second operand 13 states. [2020-11-06 22:15:42,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:15:42,495 INFO L93 Difference]: Finished difference Result 268 states and 514 transitions. [2020-11-06 22:15:42,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-06 22:15:42,496 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2020-11-06 22:15:42,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:15:42,503 INFO L225 Difference]: With dead ends: 268 [2020-11-06 22:15:42,504 INFO L226 Difference]: Without dead ends: 167 [2020-11-06 22:15:42,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2020-11-06 22:15:42,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-11-06 22:15:42,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 144. [2020-11-06 22:15:42,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-11-06 22:15:42,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 246 transitions. [2020-11-06 22:15:42,577 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 246 transitions. Word has length 56 [2020-11-06 22:15:42,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:15:42,577 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 246 transitions. [2020-11-06 22:15:42,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-06 22:15:42,578 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 246 transitions. [2020-11-06 22:15:42,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-11-06 22:15:42,580 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:15:42,581 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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] [2020-11-06 22:15:42,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-06 22:15:42,794 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:15:42,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:15:42,795 INFO L82 PathProgramCache]: Analyzing trace with hash -2073039210, now seen corresponding path program 1 times [2020-11-06 22:15:42,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:15:42,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719339225] [2020-11-06 22:15:42,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:15:42,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:42,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:15:42,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:42,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:15:42,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:42,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:15:42,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:43,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:15:43,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:43,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:15:43,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:43,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:15:43,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:43,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:15:43,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:43,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-06 22:15:43,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:43,119 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-11-06 22:15:43,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719339225] [2020-11-06 22:15:43,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289288455] [2020-11-06 22:15:43,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:15:43,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:43,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-06 22:15:43,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:15:43,239 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-11-06 22:15:43,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:15:43,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 14 [2020-11-06 22:15:43,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074557664] [2020-11-06 22:15:43,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-06 22:15:43,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:15:43,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-06 22:15:43,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-11-06 22:15:43,241 INFO L87 Difference]: Start difference. First operand 144 states and 246 transitions. Second operand 14 states. [2020-11-06 22:15:44,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:15:44,491 INFO L93 Difference]: Finished difference Result 307 states and 586 transitions. [2020-11-06 22:15:44,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-06 22:15:44,492 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 57 [2020-11-06 22:15:44,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:15:44,498 INFO L225 Difference]: With dead ends: 307 [2020-11-06 22:15:44,498 INFO L226 Difference]: Without dead ends: 103 [2020-11-06 22:15:44,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2020-11-06 22:15:44,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-06 22:15:44,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 85. [2020-11-06 22:15:44,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-11-06 22:15:44,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 128 transitions. [2020-11-06 22:15:44,528 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 128 transitions. Word has length 57 [2020-11-06 22:15:44,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:15:44,528 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 128 transitions. [2020-11-06 22:15:44,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-06 22:15:44,529 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 128 transitions. [2020-11-06 22:15:44,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-11-06 22:15:44,533 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:15:44,534 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:15:44,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:15:44,738 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:15:44,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:15:44,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1406199094, now seen corresponding path program 1 times [2020-11-06 22:15:44,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:15:44,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93487520] [2020-11-06 22:15:44,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:15:44,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:44,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:15:44,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:44,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:15:44,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:44,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:15:44,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:45,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:15:45,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:45,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:15:45,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:45,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:15:45,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:45,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:15:45,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:45,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-06 22:15:45,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:45,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:15:45,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:45,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:15:45,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:45,322 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-11-06 22:15:45,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93487520] [2020-11-06 22:15:45,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949605798] [2020-11-06 22:15:45,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:15:45,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:45,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 39 conjunts are in the unsatisfiable core [2020-11-06 22:15:45,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:15:45,734 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-11-06 22:15:45,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:15:45,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 22 [2020-11-06 22:15:45,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609363939] [2020-11-06 22:15:45,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-06 22:15:45,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:15:45,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-06 22:15:45,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2020-11-06 22:15:45,739 INFO L87 Difference]: Start difference. First operand 85 states and 128 transitions. Second operand 22 states. [2020-11-06 22:15:47,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:15:47,365 INFO L93 Difference]: Finished difference Result 133 states and 223 transitions. [2020-11-06 22:15:47,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-06 22:15:47,365 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 70 [2020-11-06 22:15:47,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:15:47,368 INFO L225 Difference]: With dead ends: 133 [2020-11-06 22:15:47,368 INFO L226 Difference]: Without dead ends: 128 [2020-11-06 22:15:47,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 84 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=127, Invalid=1279, Unknown=0, NotChecked=0, Total=1406 [2020-11-06 22:15:47,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-11-06 22:15:47,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 95. [2020-11-06 22:15:47,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-11-06 22:15:47,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 153 transitions. [2020-11-06 22:15:47,387 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 153 transitions. Word has length 70 [2020-11-06 22:15:47,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:15:47,388 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 153 transitions. [2020-11-06 22:15:47,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-06 22:15:47,388 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 153 transitions. [2020-11-06 22:15:47,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-06 22:15:47,390 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:15:47,390 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 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] [2020-11-06 22:15:47,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:15:47,605 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:15:47,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:15:47,606 INFO L82 PathProgramCache]: Analyzing trace with hash 2097538675, now seen corresponding path program 2 times [2020-11-06 22:15:47,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:15:47,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572324321] [2020-11-06 22:15:47,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:15:47,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:47,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:15:47,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:47,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:15:47,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:47,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:15:47,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:47,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:15:47,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:47,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:15:47,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:47,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:15:47,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:47,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:15:47,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:47,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-06 22:15:47,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:47,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:15:47,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:47,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:15:47,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:47,884 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 35 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-11-06 22:15:47,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572324321] [2020-11-06 22:15:47,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946928498] [2020-11-06 22:15:47,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:15:47,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:15:47,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:15:47,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-06 22:15:48,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:15:48,138 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 8 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-11-06 22:15:48,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:15:48,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 17 [2020-11-06 22:15:48,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072417125] [2020-11-06 22:15:48,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-06 22:15:48,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:15:48,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-06 22:15:48,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2020-11-06 22:15:48,143 INFO L87 Difference]: Start difference. First operand 95 states and 153 transitions. Second operand 17 states. [2020-11-06 22:15:49,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:15:49,892 INFO L93 Difference]: Finished difference Result 197 states and 354 transitions. [2020-11-06 22:15:49,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-06 22:15:49,893 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2020-11-06 22:15:49,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:15:49,896 INFO L225 Difference]: With dead ends: 197 [2020-11-06 22:15:49,896 INFO L226 Difference]: Without dead ends: 101 [2020-11-06 22:15:49,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2020-11-06 22:15:49,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-11-06 22:15:49,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 92. [2020-11-06 22:15:49,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-11-06 22:15:49,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 124 transitions. [2020-11-06 22:15:49,911 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 124 transitions. Word has length 71 [2020-11-06 22:15:49,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:15:49,911 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 124 transitions. [2020-11-06 22:15:49,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-06 22:15:49,911 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 124 transitions. [2020-11-06 22:15:49,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-06 22:15:49,913 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:15:49,913 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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] [2020-11-06 22:15:50,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-06 22:15:50,128 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:15:50,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:15:50,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1529278937, now seen corresponding path program 1 times [2020-11-06 22:15:50,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:15:50,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400385226] [2020-11-06 22:15:50,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:15:50,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:50,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:15:50,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:50,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:15:50,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:50,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:15:50,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:50,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:15:50,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:50,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:15:50,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:50,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:15:50,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:50,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-11-06 22:15:50,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:50,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-11-06 22:15:50,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:50,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:15:50,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:50,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:15:50,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:50,275 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 16 proven. 22 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-11-06 22:15:50,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400385226] [2020-11-06 22:15:50,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677485707] [2020-11-06 22:15:50,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:15:50,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:50,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-06 22:15:50,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:15:50,429 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-11-06 22:15:50,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:15:50,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2020-11-06 22:15:50,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346597407] [2020-11-06 22:15:50,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-06 22:15:50,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:15:50,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-06 22:15:50,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-11-06 22:15:50,432 INFO L87 Difference]: Start difference. First operand 92 states and 124 transitions. Second operand 13 states. [2020-11-06 22:15:51,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:15:51,232 INFO L93 Difference]: Finished difference Result 164 states and 239 transitions. [2020-11-06 22:15:51,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-06 22:15:51,233 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 71 [2020-11-06 22:15:51,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:15:51,234 INFO L225 Difference]: With dead ends: 164 [2020-11-06 22:15:51,234 INFO L226 Difference]: Without dead ends: 0 [2020-11-06 22:15:51,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2020-11-06 22:15:51,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-06 22:15:51,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-06 22:15:51,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-06 22:15:51,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-06 22:15:51,237 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 71 [2020-11-06 22:15:51,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:15:51,237 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-06 22:15:51,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-06 22:15:51,238 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-06 22:15:51,238 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-06 22:15:51,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:15:51,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-06 22:15:52,331 WARN L194 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 16 [2020-11-06 22:15:52,700 WARN L194 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 23 [2020-11-06 22:15:52,974 INFO L266 CegarLoopResult]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2020-11-06 22:15:52,974 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 4) the Hoare annotation is: true [2020-11-06 22:15:52,974 INFO L266 CegarLoopResult]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2020-11-06 22:15:52,974 INFO L266 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-06 22:15:52,974 INFO L266 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:15:52,975 INFO L262 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-11-06 22:15:52,975 INFO L266 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:15:52,975 INFO L266 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:15:52,975 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-06 22:15:52,975 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-06 22:15:52,975 INFO L266 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:15:52,975 INFO L269 CegarLoopResult]: At program point mainENTRY(lines 37 44) the Hoare annotation is: true [2020-11-06 22:15:52,976 INFO L266 CegarLoopResult]: For program point mainEXIT(lines 37 44) no Hoare annotation was computed. [2020-11-06 22:15:52,976 INFO L266 CegarLoopResult]: For program point mainFINAL(lines 37 44) no Hoare annotation was computed. [2020-11-06 22:15:52,976 INFO L262 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: false [2020-11-06 22:15:52,976 INFO L266 CegarLoopResult]: For program point L40(lines 40 42) no Hoare annotation was computed. [2020-11-06 22:15:52,976 INFO L266 CegarLoopResult]: For program point L41-1(line 41) no Hoare annotation was computed. [2020-11-06 22:15:52,976 INFO L262 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: (and (<= 4 main_~x~0) (<= main_~x~0 4)) [2020-11-06 22:15:52,976 INFO L266 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-11-06 22:15:52,976 INFO L266 CegarLoopResult]: For program point L40-2(lines 40 42) no Hoare annotation was computed. [2020-11-06 22:15:52,977 INFO L269 CegarLoopResult]: At program point fibo2ENTRY(lines 19 27) the Hoare annotation is: true [2020-11-06 22:15:52,977 INFO L262 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2020-11-06 22:15:52,977 INFO L266 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-11-06 22:15:52,977 INFO L262 CegarLoopResult]: At program point L25-2(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (or (and (<= |fibo2_#t~ret9| 1) (< 1 fibo2_~n) (<= 1 |fibo2_#t~ret9|) (<= |fibo2_#in~n| 2)) (not (<= |fibo2_#in~n| 3)))) [2020-11-06 22:15:52,977 INFO L266 CegarLoopResult]: For program point L22(lines 22 26) no Hoare annotation was computed. [2020-11-06 22:15:52,977 INFO L266 CegarLoopResult]: For program point L25-3(line 25) no Hoare annotation was computed. [2020-11-06 22:15:52,978 INFO L266 CegarLoopResult]: For program point L20(lines 20 26) no Hoare annotation was computed. [2020-11-06 22:15:52,978 INFO L266 CegarLoopResult]: For program point fibo2FINAL(lines 19 27) no Hoare annotation was computed. [2020-11-06 22:15:52,978 INFO L266 CegarLoopResult]: For program point fibo2EXIT(lines 19 27) no Hoare annotation was computed. [2020-11-06 22:15:52,978 INFO L269 CegarLoopResult]: At program point fibo1ENTRY(lines 9 17) the Hoare annotation is: true [2020-11-06 22:15:52,978 INFO L262 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: (and (<= |fibo1_#in~n| fibo1_~n) (not (<= |fibo1_#in~n| 2)) (<= fibo1_~n |fibo1_#in~n|)) [2020-11-06 22:15:52,978 INFO L266 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2020-11-06 22:15:52,978 INFO L262 CegarLoopResult]: At program point L15-2(line 15) the Hoare annotation is: (and (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= 4 fibo1_~n) .cse0 (<= |fibo1_#t~ret7| 2) (<= 2 |fibo1_#t~ret7|)) (and (<= |fibo1_#in~n| 3) (<= 1 |fibo1_#t~ret7|) (<= |fibo1_#t~ret7| 1) .cse0) (and (<= 5 |fibo1_#in~n|) .cse0))) (not (<= |fibo1_#in~n| 2))) [2020-11-06 22:15:52,979 INFO L266 CegarLoopResult]: For program point L12(lines 12 16) no Hoare annotation was computed. [2020-11-06 22:15:52,979 INFO L266 CegarLoopResult]: For program point L15-3(line 15) no Hoare annotation was computed. [2020-11-06 22:15:52,979 INFO L266 CegarLoopResult]: For program point fibo1FINAL(lines 9 17) no Hoare annotation was computed. [2020-11-06 22:15:52,979 INFO L266 CegarLoopResult]: For program point L10(lines 10 16) no Hoare annotation was computed. [2020-11-06 22:15:52,979 INFO L266 CegarLoopResult]: For program point fibo1EXIT(lines 9 17) no Hoare annotation was computed. [2020-11-06 22:15:52,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:15:52 BoogieIcfgContainer [2020-11-06 22:15:52,986 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:15:52,988 INFO L168 Benchmark]: Toolchain (without parser) took 20936.09 ms. Allocated memory was 160.4 MB in the beginning and 345.0 MB in the end (delta: 184.5 MB). Free memory was 135.4 MB in the beginning and 185.6 MB in the end (delta: -50.2 MB). Peak memory consumption was 199.7 MB. Max. memory is 8.0 GB. [2020-11-06 22:15:52,988 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 160.4 MB. Free memory is still 133.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:15:52,989 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.40 ms. Allocated memory is still 160.4 MB. Free memory was 134.9 MB in the beginning and 125.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:15:52,990 INFO L168 Benchmark]: Boogie Preprocessor took 45.55 ms. Allocated memory is still 160.4 MB. Free memory was 125.5 MB in the beginning and 124.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:15:52,990 INFO L168 Benchmark]: RCFGBuilder took 500.34 ms. Allocated memory is still 160.4 MB. Free memory was 124.2 MB in the beginning and 110.0 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-11-06 22:15:52,991 INFO L168 Benchmark]: TraceAbstraction took 20121.93 ms. Allocated memory was 160.4 MB in the beginning and 345.0 MB in the end (delta: 184.5 MB). Free memory was 109.5 MB in the beginning and 185.6 MB in the end (delta: -76.0 MB). Peak memory consumption was 173.5 MB. Max. memory is 8.0 GB. [2020-11-06 22:15:52,994 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 160.4 MB. Free memory is still 133.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 254.40 ms. Allocated memory is still 160.4 MB. Free memory was 134.9 MB in the beginning and 125.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 45.55 ms. Allocated memory is still 160.4 MB. Free memory was 125.5 MB in the beginning and 124.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 500.34 ms. Allocated memory is still 160.4 MB. Free memory was 124.2 MB in the beginning and 110.0 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 20121.93 ms. Allocated memory was 160.4 MB in the beginning and 345.0 MB in the end (delta: 184.5 MB). Free memory was 109.5 MB in the beginning and 185.6 MB in the end (delta: -76.0 MB). Peak memory consumption was 173.5 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 18.4s, OverallIterations: 11, TraceHistogramMax: 5, AutomataDifference: 11.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 325 SDtfs, 630 SDslu, 924 SDs, 0 SdLazy, 4107 SolverSat, 610 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 841 GetRequests, 596 SyntacticMatches, 9 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 7.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=144occurred in iteration=7, 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, 11 MinimizatonAttempts, 103 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 13 LocationsWithAnnotation, 422 PreInvPairs, 511 NumberOfFragments, 124 HoareAnnotationTreeSize, 422 FomulaSimplifications, 3975 FormulaSimplificationTreeSizeReduction, 0.7s HoareSimplificationTime, 13 FomulaSimplificationsInter, 2912 FormulaSimplificationTreeSizeReductionInter, 0.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 3.8s InterpolantComputationTime, 961 NumberOfCodeBlocks, 961 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 941 ConstructedInterpolants, 0 QuantifiedInterpolants, 124223 SizeOfPredicates, 31 NumberOfNonLiveVariables, 1596 ConjunctsInSsa, 99 ConjunctsInUnsatCore, 20 InterpolantComputations, 2 PerfectInterpolantSequences, 549/762 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...