/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:10:44,143 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:10:44,146 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:10:44,166 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:10:44,166 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:10:44,169 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:10:44,171 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:10:44,181 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:10:44,185 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:10:44,189 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:10:44,191 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:10:44,194 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:10:44,194 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:10:44,196 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:10:44,198 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:10:44,200 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:10:44,201 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:10:44,202 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:10:44,204 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:10:44,209 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:10:44,215 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:10:44,220 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:10:44,221 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:10:44,221 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:10:44,224 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-07 11:10:44,224 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-07 11:10:44,224 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-07 11:10:44,227 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-07 11:10:44,228 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-07 11:10:44,230 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-07 11:10:44,230 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-07 11:10:44,232 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-07 11:10:44,233 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-07 11:10:44,234 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-07 11:10:44,235 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-07 11:10:44,235 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-07 11:10:44,236 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-07 11:10:44,236 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-07 11:10:44,237 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 11:10:44,240 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 11:10:44,241 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 11:10:44,242 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 [2020-07-07 11:10:44,279 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:10:44,280 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:10:44,285 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:10:44,286 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:10:44,286 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:10:44,286 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:10:44,286 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:10:44,287 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:10:44,287 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:10:44,287 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:10:44,287 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:10:44,292 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:10:44,293 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:10:44,293 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:10:44,293 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:10:44,293 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:10:44,293 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:10:44,293 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:10:44,294 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:10:44,294 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:10:44,294 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:10:44,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:10:44,294 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:10:44,294 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:10:44,294 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:10:44,295 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:10:44,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:10:44,295 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:10:44,295 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:10:44,295 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:10:44,571 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:10:44,584 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:10:44,588 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:10:44,589 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:10:44,590 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:10:44,591 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c [2020-07-07 11:10:44,671 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ceb91dad4/718f0cdcfcdd44adb4e034e47f42eae5/FLAG4851fb72a [2020-07-07 11:10:45,158 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:10:45,159 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c [2020-07-07 11:10:45,167 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ceb91dad4/718f0cdcfcdd44adb4e034e47f42eae5/FLAG4851fb72a [2020-07-07 11:10:45,539 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ceb91dad4/718f0cdcfcdd44adb4e034e47f42eae5 [2020-07-07 11:10:45,549 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:10:45,551 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:10:45,553 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:10:45,553 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:10:45,557 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:10:45,558 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:10:45" (1/1) ... [2020-07-07 11:10:45,562 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@650fb0a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:10:45, skipping insertion in model container [2020-07-07 11:10:45,562 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:10:45" (1/1) ... [2020-07-07 11:10:45,570 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:10:45,592 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:10:45,748 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:10:45,753 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:10:45,772 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:10:45,787 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:10:45,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:10:45 WrapperNode [2020-07-07 11:10:45,788 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:10:45,789 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:10:45,789 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:10:45,790 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:10:45,804 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:10:45" (1/1) ... [2020-07-07 11:10:45,805 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:10:45" (1/1) ... [2020-07-07 11:10:45,811 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:10:45" (1/1) ... [2020-07-07 11:10:45,811 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:10:45" (1/1) ... [2020-07-07 11:10:45,905 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:10:45" (1/1) ... [2020-07-07 11:10:45,908 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:10:45" (1/1) ... [2020-07-07 11:10:45,914 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:10:45" (1/1) ... [2020-07-07 11:10:45,916 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:10:45,916 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:10:45,917 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:10:45,917 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:10:45,918 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:10:45" (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 [2020-07-07 11:10:45,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:10:45,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:10:45,988 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-07 11:10:45,988 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-07 11:10:45,988 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:10:45,988 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 11:10:45,988 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:10:45,988 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-07 11:10:45,989 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-07 11:10:45,989 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:10:45,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:10:45,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:10:46,194 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:10:46,194 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 11:10:46,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:10:46 BoogieIcfgContainer [2020-07-07 11:10:46,200 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:10:46,201 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:10:46,201 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:10:46,205 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:10:46,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:10:45" (1/3) ... [2020-07-07 11:10:46,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b2a3807 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:10:46, skipping insertion in model container [2020-07-07 11:10:46,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:10:45" (2/3) ... [2020-07-07 11:10:46,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b2a3807 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:10:46, skipping insertion in model container [2020-07-07 11:10:46,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:10:46" (3/3) ... [2020-07-07 11:10:46,209 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-1.c [2020-07-07 11:10:46,221 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:10:46,231 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:10:46,262 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:10:46,317 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:10:46,320 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:10:46,321 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:10:46,321 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:10:46,321 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:10:46,321 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:10:46,321 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:10:46,321 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:10:46,355 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-07 11:10:46,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-07 11:10:46,372 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:10:46,374 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:10:46,374 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:10:46,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:10:46,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-07 11:10:46,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:10:46,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934444167] [2020-07-07 11:10:46,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:10:46,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:46,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:46,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:46,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:10:46,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934444167] [2020-07-07 11:10:46,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:10:46,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:10:46,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536700858] [2020-07-07 11:10:46,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:10:46,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:10:46,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:10:46,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:10:46,640 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-07 11:10:46,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:10:46,766 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-07 11:10:46,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:10:46,768 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-07 11:10:46,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:10:46,786 INFO L225 Difference]: With dead ends: 44 [2020-07-07 11:10:46,787 INFO L226 Difference]: Without dead ends: 30 [2020-07-07 11:10:46,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:10:46,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-07 11:10:46,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-07 11:10:46,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-07 11:10:46,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-07 11:10:46,853 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-07 11:10:46,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:10:46,854 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-07 11:10:46,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:10:46,854 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-07 11:10:46,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-07 11:10:46,856 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:10:46,857 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:10:46,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:10:46,857 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:10:46,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:10:46,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-07 11:10:46,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:10:46,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408141381] [2020-07-07 11:10:46,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:10:46,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:46,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:46,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:46,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:10:46,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408141381] [2020-07-07 11:10:46,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:10:46,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:10:46,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316562164] [2020-07-07 11:10:46,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:10:46,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:10:46,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:10:46,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:10:46,928 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-07 11:10:46,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:10:46,996 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-07 11:10:46,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:10:46,997 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-07 11:10:46,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:10:46,999 INFO L225 Difference]: With dead ends: 36 [2020-07-07 11:10:46,999 INFO L226 Difference]: Without dead ends: 32 [2020-07-07 11:10:47,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:10:47,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-07 11:10:47,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-07 11:10:47,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-07 11:10:47,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-07 11:10:47,011 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-07 11:10:47,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:10:47,012 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-07 11:10:47,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:10:47,012 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-07 11:10:47,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-07 11:10:47,014 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:10:47,014 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] [2020-07-07 11:10:47,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 11:10:47,014 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:10:47,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:10:47,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-07 11:10:47,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:10:47,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618864475] [2020-07-07 11:10:47,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:10:47,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:47,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:47,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:47,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:47,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:47,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-07 11:10:47,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618864475] [2020-07-07 11:10:47,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948690608] [2020-07-07 11:10:47,174 INFO L94 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 [2020-07-07 11:10:47,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:47,230 INFO L264 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-07 11:10:47,237 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:10:47,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-07 11:10:47,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:10:47,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-07 11:10:47,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299285459] [2020-07-07 11:10:47,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 11:10:47,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:10:47,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 11:10:47,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-07-07 11:10:47,331 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-07 11:10:47,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:10:47,590 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-07-07 11:10:47,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-07 11:10:47,592 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-07 11:10:47,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:10:47,593 INFO L225 Difference]: With dead ends: 58 [2020-07-07 11:10:47,593 INFO L226 Difference]: Without dead ends: 34 [2020-07-07 11:10:47,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-07 11:10:47,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-07 11:10:47,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-07-07 11:10:47,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-07 11:10:47,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-07-07 11:10:47,616 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-07-07 11:10:47,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:10:47,620 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-07-07 11:10:47,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 11:10:47,621 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-07-07 11:10:47,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-07 11:10:47,623 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:10:47,625 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] [2020-07-07 11:10:47,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-07 11:10:47,841 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:10:47,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:10:47,842 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-07 11:10:47,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:10:47,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262039471] [2020-07-07 11:10:47,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:10:47,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:47,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:47,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:47,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:47,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:47,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-07 11:10:47,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262039471] [2020-07-07 11:10:47,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563395372] [2020-07-07 11:10:47,955 INFO L94 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) [2020-07-07 11:10:47,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:47,989 INFO L264 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:10:47,992 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:10:48,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-07 11:10:48,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:10:48,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2020-07-07 11:10:48,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657258830] [2020-07-07 11:10:48,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 11:10:48,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:10:48,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 11:10:48,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-07 11:10:48,041 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 10 states. [2020-07-07 11:10:48,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:10:48,240 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2020-07-07 11:10:48,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 11:10:48,241 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-07 11:10:48,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:10:48,245 INFO L225 Difference]: With dead ends: 54 [2020-07-07 11:10:48,246 INFO L226 Difference]: Without dead ends: 50 [2020-07-07 11:10:48,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:10:48,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-07 11:10:48,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-07-07 11:10:48,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-07 11:10:48,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-07-07 11:10:48,269 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 27 [2020-07-07 11:10:48,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:10:48,270 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-07-07 11:10:48,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 11:10:48,270 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-07-07 11:10:48,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-07 11:10:48,272 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:10:48,272 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] [2020-07-07 11:10:48,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:10:48,474 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:10:48,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:10:48,474 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-07 11:10:48,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:10:48,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827658409] [2020-07-07 11:10:48,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:10:48,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:48,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:48,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:48,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:48,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:48,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:48,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:48,567 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 11:10:48,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827658409] [2020-07-07 11:10:48,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213682109] [2020-07-07 11:10:48,568 INFO L94 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) [2020-07-07 11:10:48,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:10:48,603 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-07 11:10:48,605 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:10:48,678 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-07 11:10:48,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:10:48,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2020-07-07 11:10:48,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716590582] [2020-07-07 11:10:48,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 11:10:48,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:10:48,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 11:10:48,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:10:48,681 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 11 states. [2020-07-07 11:10:49,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:10:49,029 INFO L93 Difference]: Finished difference Result 108 states and 170 transitions. [2020-07-07 11:10:49,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-07 11:10:49,031 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-07 11:10:49,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:10:49,037 INFO L225 Difference]: With dead ends: 108 [2020-07-07 11:10:49,038 INFO L226 Difference]: Without dead ends: 66 [2020-07-07 11:10:49,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-07-07 11:10:49,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-07 11:10:49,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-07-07 11:10:49,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-07 11:10:49,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 95 transitions. [2020-07-07 11:10:49,070 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 95 transitions. Word has length 39 [2020-07-07 11:10:49,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:10:49,073 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 95 transitions. [2020-07-07 11:10:49,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 11:10:49,074 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 95 transitions. [2020-07-07 11:10:49,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-07 11:10:49,076 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:10:49,079 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] [2020-07-07 11:10:49,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:10:49,295 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:10:49,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:10:49,296 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-07 11:10:49,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:10:49,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131415232] [2020-07-07 11:10:49,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:10:49,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:49,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:49,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:49,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:49,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:49,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:49,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:49,431 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-07 11:10:49,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131415232] [2020-07-07 11:10:49,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164424378] [2020-07-07 11:10:49,432 INFO L94 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) [2020-07-07 11:10:49,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:10:49,468 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-07 11:10:49,471 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:10:49,536 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 11:10:49,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:10:49,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2020-07-07 11:10:49,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657889534] [2020-07-07 11:10:49,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-07 11:10:49,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:10:49,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-07 11:10:49,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-07-07 11:10:49,539 INFO L87 Difference]: Start difference. First operand 66 states and 95 transitions. Second operand 14 states. [2020-07-07 11:10:49,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:10:49,941 INFO L93 Difference]: Finished difference Result 180 states and 324 transitions. [2020-07-07 11:10:49,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-07 11:10:49,942 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2020-07-07 11:10:49,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:10:49,945 INFO L225 Difference]: With dead ends: 180 [2020-07-07 11:10:49,945 INFO L226 Difference]: Without dead ends: 120 [2020-07-07 11:10:49,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2020-07-07 11:10:49,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-07-07 11:10:49,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 106. [2020-07-07 11:10:49,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-07 11:10:49,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 169 transitions. [2020-07-07 11:10:49,985 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 169 transitions. Word has length 40 [2020-07-07 11:10:49,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:10:49,985 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 169 transitions. [2020-07-07 11:10:49,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-07 11:10:49,985 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 169 transitions. [2020-07-07 11:10:49,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-07 11:10:49,992 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:10:49,992 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] [2020-07-07 11:10:50,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:10:50,193 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:10:50,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:10:50,194 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-07 11:10:50,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:10:50,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872009804] [2020-07-07 11:10:50,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:10:50,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:50,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:50,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:50,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:50,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:50,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:50,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:50,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:50,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:50,379 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-07-07 11:10:50,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872009804] [2020-07-07 11:10:50,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116192383] [2020-07-07 11:10:50,380 INFO L94 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 [2020-07-07 11:10:50,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:50,432 INFO L264 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-07 11:10:50,441 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:10:50,555 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-07 11:10:50,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:10:50,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-07-07 11:10:50,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937601697] [2020-07-07 11:10:50,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-07 11:10:50,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:10:50,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-07 11:10:50,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-07-07 11:10:50,560 INFO L87 Difference]: Start difference. First operand 106 states and 169 transitions. Second operand 15 states. [2020-07-07 11:10:51,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:10:51,101 INFO L93 Difference]: Finished difference Result 258 states and 498 transitions. [2020-07-07 11:10:51,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-07 11:10:51,103 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 54 [2020-07-07 11:10:51,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:10:51,106 INFO L225 Difference]: With dead ends: 258 [2020-07-07 11:10:51,106 INFO L226 Difference]: Without dead ends: 158 [2020-07-07 11:10:51,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2020-07-07 11:10:51,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-07-07 11:10:51,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 112. [2020-07-07 11:10:51,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-07-07 11:10:51,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 180 transitions. [2020-07-07 11:10:51,134 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 180 transitions. Word has length 54 [2020-07-07 11:10:51,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:10:51,135 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 180 transitions. [2020-07-07 11:10:51,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-07 11:10:51,135 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 180 transitions. [2020-07-07 11:10:51,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-07 11:10:51,139 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:10:51,139 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:10:51,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-07 11:10:51,353 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:10:51,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:10:51,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1229769625, now seen corresponding path program 1 times [2020-07-07 11:10:51,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:10:51,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321349564] [2020-07-07 11:10:51,355 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:10:51,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:51,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:51,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:51,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:51,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:51,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:51,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:51,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:51,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:51,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:51,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:51,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:51,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:51,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:51,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:51,750 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 40 proven. 57 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-07-07 11:10:51,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321349564] [2020-07-07 11:10:51,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748559332] [2020-07-07 11:10:51,752 INFO L94 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 [2020-07-07 11:10:51,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:51,810 INFO L264 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-07 11:10:51,824 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:10:51,890 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2020-07-07 11:10:51,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:10:51,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2020-07-07 11:10:51,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227028928] [2020-07-07 11:10:51,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-07 11:10:51,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:10:51,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-07 11:10:51,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-07-07 11:10:51,893 INFO L87 Difference]: Start difference. First operand 112 states and 180 transitions. Second operand 16 states. [2020-07-07 11:10:52,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:10:52,360 INFO L93 Difference]: Finished difference Result 244 states and 474 transitions. [2020-07-07 11:10:52,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-07 11:10:52,362 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 96 [2020-07-07 11:10:52,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:10:52,364 INFO L225 Difference]: With dead ends: 244 [2020-07-07 11:10:52,364 INFO L226 Difference]: Without dead ends: 123 [2020-07-07 11:10:52,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2020-07-07 11:10:52,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-07-07 11:10:52,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 101. [2020-07-07 11:10:52,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-07-07 11:10:52,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 154 transitions. [2020-07-07 11:10:52,383 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 154 transitions. Word has length 96 [2020-07-07 11:10:52,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:10:52,384 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 154 transitions. [2020-07-07 11:10:52,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-07 11:10:52,384 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 154 transitions. [2020-07-07 11:10:52,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-07-07 11:10:52,387 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:10:52,387 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 7, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:10:52,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:10:52,601 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:10:52,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:10:52,602 INFO L82 PathProgramCache]: Analyzing trace with hash 465900404, now seen corresponding path program 1 times [2020-07-07 11:10:52,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:10:52,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408526292] [2020-07-07 11:10:52,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:10:52,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:52,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:52,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:52,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:52,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:52,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:52,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:52,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:52,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:52,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:52,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:52,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:52,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:52,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:52,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:52,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:52,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:52,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:52,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:52,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:52,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:52,930 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 63 proven. 163 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2020-07-07 11:10:52,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408526292] [2020-07-07 11:10:52,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006443679] [2020-07-07 11:10:52,931 INFO L94 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 [2020-07-07 11:10:52,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:52,999 INFO L264 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-07 11:10:53,003 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:10:53,147 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 60 proven. 100 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2020-07-07 11:10:53,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:10:53,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 20 [2020-07-07 11:10:53,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387812729] [2020-07-07 11:10:53,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-07 11:10:53,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:10:53,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-07 11:10:53,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-07-07 11:10:53,153 INFO L87 Difference]: Start difference. First operand 101 states and 154 transitions. Second operand 20 states. [2020-07-07 11:10:53,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:10:53,894 INFO L93 Difference]: Finished difference Result 249 states and 477 transitions. [2020-07-07 11:10:53,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-07 11:10:53,895 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 138 [2020-07-07 11:10:53,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:10:53,898 INFO L225 Difference]: With dead ends: 249 [2020-07-07 11:10:53,898 INFO L226 Difference]: Without dead ends: 114 [2020-07-07 11:10:53,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2020-07-07 11:10:53,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-07-07 11:10:53,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 101. [2020-07-07 11:10:53,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-07-07 11:10:53,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 143 transitions. [2020-07-07 11:10:53,916 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 143 transitions. Word has length 138 [2020-07-07 11:10:53,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:10:53,917 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 143 transitions. [2020-07-07 11:10:53,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-07 11:10:53,917 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 143 transitions. [2020-07-07 11:10:53,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-07-07 11:10:53,920 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:10:53,920 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:10:54,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:10:54,136 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:10:54,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:10:54,137 INFO L82 PathProgramCache]: Analyzing trace with hash 2011292190, now seen corresponding path program 2 times [2020-07-07 11:10:54,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:10:54,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377861040] [2020-07-07 11:10:54,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:10:54,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:54,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:54,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:54,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:54,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:54,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:54,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:54,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:54,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:54,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:54,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:54,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:54,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:54,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:54,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:54,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:54,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:54,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:54,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:54,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:54,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:54,716 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 92 proven. 147 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2020-07-07 11:10:54,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377861040] [2020-07-07 11:10:54,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219108764] [2020-07-07 11:10:54,718 INFO L92 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 [2020-07-07 11:10:54,784 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:10:54,784 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:10:54,786 INFO L264 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-07 11:10:54,794 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:10:54,906 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 131 proven. 51 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2020-07-07 11:10:54,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:10:54,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10] total 24 [2020-07-07 11:10:54,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605112745] [2020-07-07 11:10:54,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-07 11:10:54,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:10:54,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-07 11:10:54,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2020-07-07 11:10:54,914 INFO L87 Difference]: Start difference. First operand 101 states and 143 transitions. Second operand 24 states. [2020-07-07 11:10:55,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:10:55,689 INFO L93 Difference]: Finished difference Result 233 states and 370 transitions. [2020-07-07 11:10:55,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-07 11:10:55,689 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 136 [2020-07-07 11:10:55,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:10:55,692 INFO L225 Difference]: With dead ends: 233 [2020-07-07 11:10:55,692 INFO L226 Difference]: Without dead ends: 135 [2020-07-07 11:10:55,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=1191, Unknown=0, NotChecked=0, Total=1406 [2020-07-07 11:10:55,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-07-07 11:10:55,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 111. [2020-07-07 11:10:55,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-07-07 11:10:55,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 153 transitions. [2020-07-07 11:10:55,709 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 153 transitions. Word has length 136 [2020-07-07 11:10:55,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:10:55,709 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 153 transitions. [2020-07-07 11:10:55,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-07 11:10:55,710 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 153 transitions. [2020-07-07 11:10:55,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-07-07 11:10:55,711 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:10:55,712 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:10:55,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-07 11:10:55,926 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:10:55,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:10:55,927 INFO L82 PathProgramCache]: Analyzing trace with hash -46122593, now seen corresponding path program 3 times [2020-07-07 11:10:55,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:10:55,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448178089] [2020-07-07 11:10:55,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:10:55,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:55,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:55,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:55,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:56,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:56,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:56,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:56,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:56,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:56,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:56,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:56,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:56,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:56,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:56,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:56,202 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 60 proven. 49 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-07-07 11:10:56,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448178089] [2020-07-07 11:10:56,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447117895] [2020-07-07 11:10:56,203 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-07-07 11:10:56,239 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-07-07 11:10:56,240 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:10:56,241 INFO L264 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-07 11:10:56,243 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:10:56,321 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 13 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-07-07 11:10:56,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:10:56,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8] total 20 [2020-07-07 11:10:56,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653887885] [2020-07-07 11:10:56,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-07 11:10:56,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:10:56,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-07 11:10:56,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2020-07-07 11:10:56,324 INFO L87 Difference]: Start difference. First operand 111 states and 153 transitions. Second operand 20 states. [2020-07-07 11:10:56,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:10:56,804 INFO L93 Difference]: Finished difference Result 224 states and 317 transitions. [2020-07-07 11:10:56,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-07 11:10:56,807 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 95 [2020-07-07 11:10:56,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:10:56,810 INFO L225 Difference]: With dead ends: 224 [2020-07-07 11:10:56,810 INFO L226 Difference]: Without dead ends: 126 [2020-07-07 11:10:56,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2020-07-07 11:10:56,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-07-07 11:10:56,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 114. [2020-07-07 11:10:56,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-07-07 11:10:56,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 152 transitions. [2020-07-07 11:10:56,837 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 152 transitions. Word has length 95 [2020-07-07 11:10:56,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:10:56,839 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 152 transitions. [2020-07-07 11:10:56,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-07 11:10:56,839 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 152 transitions. [2020-07-07 11:10:56,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-07 11:10:56,842 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:10:56,842 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:10:57,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:10:57,057 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:10:57,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:10:57,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1540036056, now seen corresponding path program 4 times [2020-07-07 11:10:57,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:10:57,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025342981] [2020-07-07 11:10:57,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:10:57,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:57,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:57,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:57,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:57,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:57,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:57,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:57,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:57,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:57,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:57,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:57,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:57,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:57,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:57,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:57,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:57,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:57,756 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-07-07 11:10:57,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025342981] [2020-07-07 11:10:57,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304859249] [2020-07-07 11:10:57,757 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:10:57,810 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 11:10:57,811 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:10:57,813 INFO L264 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 63 conjunts are in the unsatisfiable core [2020-07-07 11:10:57,819 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:10:58,242 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-07-07 11:10:58,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:10:58,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 28 [2020-07-07 11:10:58,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064365471] [2020-07-07 11:10:58,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-07 11:10:58,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:10:58,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-07 11:10:58,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-07-07 11:10:58,244 INFO L87 Difference]: Start difference. First operand 114 states and 152 transitions. Second operand 28 states. [2020-07-07 11:10:58,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:10:58,493 INFO L93 Difference]: Finished difference Result 121 states and 159 transitions. [2020-07-07 11:10:58,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-07 11:10:58,494 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 109 [2020-07-07 11:10:58,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:10:58,496 INFO L225 Difference]: With dead ends: 121 [2020-07-07 11:10:58,497 INFO L226 Difference]: Without dead ends: 117 [2020-07-07 11:10:58,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 138 SyntacticMatches, 9 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-07-07 11:10:58,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-07-07 11:10:58,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 114. [2020-07-07 11:10:58,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-07-07 11:10:58,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 151 transitions. [2020-07-07 11:10:58,523 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 151 transitions. Word has length 109 [2020-07-07 11:10:58,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:10:58,526 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 151 transitions. [2020-07-07 11:10:58,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-07 11:10:58,526 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 151 transitions. [2020-07-07 11:10:58,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-07-07 11:10:58,530 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:10:58,530 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:10:58,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:10:58,745 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:10:58,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:10:58,745 INFO L82 PathProgramCache]: Analyzing trace with hash 2040957224, now seen corresponding path program 1 times [2020-07-07 11:10:58,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:10:58,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679106808] [2020-07-07 11:10:58,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:10:58,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:58,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:58,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:58,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:58,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:58,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:58,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:58,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:58,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:58,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:58,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:58,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:58,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:58,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:59,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:59,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:59,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:59,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:59,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:59,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:59,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:59,046 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 61 proven. 138 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2020-07-07 11:10:59,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679106808] [2020-07-07 11:10:59,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004721602] [2020-07-07 11:10:59,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:10:59,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:59,103 INFO L264 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-07 11:10:59,106 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:10:59,245 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 49 proven. 165 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2020-07-07 11:10:59,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:10:59,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2020-07-07 11:10:59,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334503242] [2020-07-07 11:10:59,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-07 11:10:59,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:10:59,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-07 11:10:59,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2020-07-07 11:10:59,249 INFO L87 Difference]: Start difference. First operand 114 states and 151 transitions. Second operand 19 states. [2020-07-07 11:10:59,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:10:59,665 INFO L93 Difference]: Finished difference Result 221 states and 311 transitions. [2020-07-07 11:10:59,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-07 11:10:59,665 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 136 [2020-07-07 11:10:59,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:10:59,666 INFO L225 Difference]: With dead ends: 221 [2020-07-07 11:10:59,667 INFO L226 Difference]: Without dead ends: 0 [2020-07-07 11:10:59,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2020-07-07 11:10:59,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-07 11:10:59,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-07 11:10:59,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-07 11:10:59,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-07 11:10:59,669 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 136 [2020-07-07 11:10:59,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:10:59,670 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-07 11:10:59,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-07 11:10:59,670 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-07 11:10:59,670 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-07 11:10:59,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-07 11:10:59,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-07 11:11:00,763 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 6 [2020-07-07 11:11:00,886 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 6 [2020-07-07 11:11:01,202 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 23 [2020-07-07 11:11:01,208 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-07 11:11:01,208 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-07 11:11:01,208 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-07 11:11:01,208 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-07 11:11:01,208 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-07 11:11:01,209 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-07 11:11:01,209 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-07-07 11:11:01,209 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-07-07 11:11:01,209 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-07-07 11:11:01,209 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-07-07 11:11:01,210 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-07-07 11:11:01,210 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-07-07 11:11:01,210 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= main_~x~0 5) (<= 5 main_~x~0)) [2020-07-07 11:11:01,210 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-07-07 11:11:01,210 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-07-07 11:11:01,210 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-07-07 11:11:01,211 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (not (<= |fibo2_#in~n| 3)) (= fibo2_~n |fibo2_#in~n|)) [2020-07-07 11:11:01,211 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-07-07 11:11:01,211 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (and (<= 5 |fibo2_#in~n|) (= fibo2_~n |fibo2_#in~n|)) [2020-07-07 11:11:01,211 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-07-07 11:11:01,211 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-07-07 11:11:01,211 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-07-07 11:11:01,211 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-07-07 11:11:01,212 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-07-07 11:11:01,212 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-07-07 11:11:01,212 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (< 1 fibo1_~n) (= fibo1_~n |fibo1_#in~n|)) [2020-07-07 11:11:01,212 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-07-07 11:11:01,212 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (and (= fibo1_~n |fibo1_#in~n|) (or (and (< 1 fibo1_~n) (<= |fibo1_#t~ret0| 1)) (not (<= |fibo1_#in~n| 4))) (or (<= 6 |fibo1_#in~n|) (and (<= 3 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 3)) (and (<= 1 |fibo1_#t~ret0|) (<= fibo1_~n 3)))) [2020-07-07 11:11:01,213 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-07-07 11:11:01,213 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-07-07 11:11:01,213 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-07-07 11:11:01,213 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-07-07 11:11:01,213 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-07-07 11:11:01,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 11:11:01 BoogieIcfgContainer [2020-07-07 11:11:01,220 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 11:11:01,222 INFO L168 Benchmark]: Toolchain (without parser) took 15671.72 ms. Allocated memory was 139.5 MB in the beginning and 391.1 MB in the end (delta: 251.7 MB). Free memory was 102.7 MB in the beginning and 299.2 MB in the end (delta: -196.4 MB). Peak memory consumption was 232.8 MB. Max. memory is 7.1 GB. [2020-07-07 11:11:01,223 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 139.5 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-07 11:11:01,224 INFO L168 Benchmark]: CACSL2BoogieTranslator took 236.16 ms. Allocated memory is still 139.5 MB. Free memory was 102.5 MB in the beginning and 92.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-07 11:11:01,224 INFO L168 Benchmark]: Boogie Preprocessor took 126.68 ms. Allocated memory was 139.5 MB in the beginning and 204.5 MB in the end (delta: 65.0 MB). Free memory was 92.9 MB in the beginning and 183.4 MB in the end (delta: -90.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-07-07 11:11:01,225 INFO L168 Benchmark]: RCFGBuilder took 283.28 ms. Allocated memory is still 204.5 MB. Free memory was 183.4 MB in the beginning and 170.0 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. [2020-07-07 11:11:01,226 INFO L168 Benchmark]: TraceAbstraction took 15019.55 ms. Allocated memory was 204.5 MB in the beginning and 391.1 MB in the end (delta: 186.6 MB). Free memory was 169.4 MB in the beginning and 299.2 MB in the end (delta: -129.7 MB). Peak memory consumption was 234.4 MB. Max. memory is 7.1 GB. [2020-07-07 11:11:01,229 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 139.5 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 236.16 ms. Allocated memory is still 139.5 MB. Free memory was 102.5 MB in the beginning and 92.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 126.68 ms. Allocated memory was 139.5 MB in the beginning and 204.5 MB in the end (delta: 65.0 MB). Free memory was 92.9 MB in the beginning and 183.4 MB in the end (delta: -90.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 283.28 ms. Allocated memory is still 204.5 MB. Free memory was 183.4 MB in the beginning and 170.0 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 15019.55 ms. Allocated memory was 204.5 MB in the beginning and 391.1 MB in the end (delta: 186.6 MB). Free memory was 169.4 MB in the beginning and 299.2 MB in the end (delta: -129.7 MB). Peak memory consumption was 234.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: 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 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.5s, OverallIterations: 13, TraceHistogramMax: 12, AutomataDifference: 5.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 433 SDtfs, 590 SDslu, 3618 SDs, 0 SdLazy, 4047 SolverSat, 603 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1412 GetRequests, 1156 SyntacticMatches, 9 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 3.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=114occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 13 MinimizatonAttempts, 140 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 527 PreInvPairs, 743 NumberOfFragments, 69 HoareAnnotationTreeSize, 527 FomulaSimplifications, 4711 FormulaSimplificationTreeSizeReduction, 0.5s HoareSimplificationTime, 11 FomulaSimplificationsInter, 4316 FormulaSimplificationTreeSizeReductionInter, 0.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 4.5s InterpolantComputationTime, 1819 NumberOfCodeBlocks, 1778 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 1795 ConstructedInterpolants, 0 QuantifiedInterpolants, 376005 SizeOfPredicates, 46 NumberOfNonLiveVariables, 1910 ConjunctsInSsa, 153 ConjunctsInUnsatCore, 24 InterpolantComputations, 2 PerfectInterpolantSequences, 3006/4176 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...