/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 --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i20_o20-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 01:26:14,131 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 01:26:14,133 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 01:26:14,152 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 01:26:14,153 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 01:26:14,155 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 01:26:14,157 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 01:26:14,167 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 01:26:14,172 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 01:26:14,176 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 01:26:14,177 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 01:26:14,179 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 01:26:14,179 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 01:26:14,181 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 01:26:14,183 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 01:26:14,184 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 01:26:14,184 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 01:26:14,188 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 01:26:14,190 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 01:26:14,195 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 01:26:14,200 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 01:26:14,204 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 01:26:14,205 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 01:26:14,206 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 01:26:14,209 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 01:26:14,220 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 01:26:14,220 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 01:26:14,222 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 01:26:14,223 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 [2020-07-20 01:26:14,257 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 01:26:14,258 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 01:26:14,259 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 01:26:14,259 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 01:26:14,259 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 01:26:14,260 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 01:26:14,260 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 01:26:14,260 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 01:26:14,260 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 01:26:14,260 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 01:26:14,261 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 01:26:14,261 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 01:26:14,261 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 01:26:14,261 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 01:26:14,261 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 01:26:14,262 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 01:26:14,262 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 01:26:14,262 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 01:26:14,262 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 01:26:14,263 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 01:26:14,263 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 01:26:14,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 01:26:14,263 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 01:26:14,263 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 01:26:14,264 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 01:26:14,264 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 01:26:14,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 01:26:14,264 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 01:26:14,264 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 01:26:14,265 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 01:26:14,571 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 01:26:14,585 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 01:26:14,589 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 01:26:14,590 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 01:26:14,591 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 01:26:14,591 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i20_o20-1.c [2020-07-20 01:26:14,657 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e555a0b9/329241c2383e4aa094b63a26f784221a/FLAG22f5126c6 [2020-07-20 01:26:15,147 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 01:26:15,148 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i20_o20-1.c [2020-07-20 01:26:15,154 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e555a0b9/329241c2383e4aa094b63a26f784221a/FLAG22f5126c6 [2020-07-20 01:26:15,551 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e555a0b9/329241c2383e4aa094b63a26f784221a [2020-07-20 01:26:15,561 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 01:26:15,564 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 01:26:15,565 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 01:26:15,565 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 01:26:15,569 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 01:26:15,570 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:26:15" (1/1) ... [2020-07-20 01:26:15,573 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dc8f716 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:26:15, skipping insertion in model container [2020-07-20 01:26:15,574 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:26:15" (1/1) ... [2020-07-20 01:26:15,583 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 01:26:15,600 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 01:26:15,764 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:26:15,769 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 01:26:15,784 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:26:15,797 INFO L208 MainTranslator]: Completed translation [2020-07-20 01:26:15,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:26:15 WrapperNode [2020-07-20 01:26:15,798 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 01:26:15,798 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 01:26:15,798 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 01:26:15,799 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 01:26:15,808 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:26:15" (1/1) ... [2020-07-20 01:26:15,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:26:15" (1/1) ... [2020-07-20 01:26:15,813 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:26:15" (1/1) ... [2020-07-20 01:26:15,813 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:26:15" (1/1) ... [2020-07-20 01:26:15,817 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:26:15" (1/1) ... [2020-07-20 01:26:15,818 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:26:15" (1/1) ... [2020-07-20 01:26:15,819 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:26:15" (1/1) ... [2020-07-20 01:26:15,820 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 01:26:15,821 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 01:26:15,821 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 01:26:15,821 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 01:26:15,824 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:26:15" (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 [2020-07-20 01:26:15,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 01:26:15,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 01:26:15,989 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-20 01:26:15,989 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 01:26:15,989 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 01:26:15,989 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 01:26:15,990 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-20 01:26:15,990 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 01:26:15,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 01:26:15,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 01:26:16,163 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 01:26:16,163 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 01:26:16,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:26:16 BoogieIcfgContainer [2020-07-20 01:26:16,168 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 01:26:16,169 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 01:26:16,169 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 01:26:16,172 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 01:26:16,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:26:15" (1/3) ... [2020-07-20 01:26:16,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67ab8fb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:26:16, skipping insertion in model container [2020-07-20 01:26:16,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:26:15" (2/3) ... [2020-07-20 01:26:16,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67ab8fb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:26:16, skipping insertion in model container [2020-07-20 01:26:16,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:26:16" (3/3) ... [2020-07-20 01:26:16,175 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i20_o20-1.c [2020-07-20 01:26:16,185 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 01:26:16,192 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 01:26:16,207 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 01:26:16,231 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 01:26:16,231 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 01:26:16,231 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 01:26:16,232 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 01:26:16,232 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 01:26:16,232 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 01:26:16,232 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 01:26:16,232 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 01:26:16,251 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-20 01:26:16,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 01:26:16,258 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:16,259 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:26:16,260 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:16,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:16,265 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-07-20 01:26:16,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:16,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054884898] [2020-07-20 01:26:16,274 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@65e5b91a [2020-07-20 01:26:16,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:16,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:16,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:16,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:26:16,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054884898] [2020-07-20 01:26:16,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:26:16,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 01:26:16,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260932227] [2020-07-20 01:26:16,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 01:26:16,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:16,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 01:26:16,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 01:26:16,599 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-20 01:26:16,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:16,678 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-20 01:26:16,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 01:26:16,681 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 01:26:16,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:16,692 INFO L225 Difference]: With dead ends: 30 [2020-07-20 01:26:16,692 INFO L226 Difference]: Without dead ends: 18 [2020-07-20 01:26:16,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 01:26:16,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-20 01:26:16,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-20 01:26:16,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-20 01:26:16,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-20 01:26:16,738 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-20 01:26:16,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:16,739 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-20 01:26:16,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 01:26:16,739 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-20 01:26:16,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 01:26:16,742 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:16,742 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:26:16,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 01:26:16,743 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:16,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:16,743 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-07-20 01:26:16,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:16,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541056152] [2020-07-20 01:26:16,744 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@65e5b91a [2020-07-20 01:26:16,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:16,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:16,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:16,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:16,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 01:26:16,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541056152] [2020-07-20 01:26:16,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258209184] [2020-07-20 01:26:16,876 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5a760e4b No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:16,927 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5a760e4b issued 3 check-sat command(s) [2020-07-20 01:26:16,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:16,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 01:26:16,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:17,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 01:26:17,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:17,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-20 01:26:17,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719364413] [2020-07-20 01:26:17,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 01:26:17,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:17,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 01:26:17,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-20 01:26:17,024 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-07-20 01:26:17,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:17,089 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-20 01:26:17,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 01:26:17,090 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-07-20 01:26:17,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:17,091 INFO L225 Difference]: With dead ends: 25 [2020-07-20 01:26:17,092 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 01:26:17,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-07-20 01:26:17,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 01:26:17,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-20 01:26:17,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 01:26:17,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-20 01:26:17,100 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-20 01:26:17,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:17,101 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-20 01:26:17,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 01:26:17,101 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-20 01:26:17,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 01:26:17,102 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:17,103 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:26:17,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-20 01:26:17,317 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:17,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:17,319 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-07-20 01:26:17,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:17,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622553891] [2020-07-20 01:26:17,320 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@65e5b91a [2020-07-20 01:26:17,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:17,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:17,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:17,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:17,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:17,466 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 01:26:17,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622553891] [2020-07-20 01:26:17,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918706191] [2020-07-20 01:26:17,467 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79d939eb No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:17,510 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79d939eb issued 3 check-sat command(s) [2020-07-20 01:26:17,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:17,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 01:26:17,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:17,575 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 01:26:17,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:17,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-20 01:26:17,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078187036] [2020-07-20 01:26:17,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 01:26:17,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:17,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 01:26:17,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 01:26:17,582 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-07-20 01:26:17,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:17,673 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-20 01:26:17,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 01:26:17,674 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-07-20 01:26:17,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:17,676 INFO L225 Difference]: With dead ends: 28 [2020-07-20 01:26:17,676 INFO L226 Difference]: Without dead ends: 24 [2020-07-20 01:26:17,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-07-20 01:26:17,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-20 01:26:17,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-20 01:26:17,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-20 01:26:17,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-20 01:26:17,684 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-20 01:26:17,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:17,684 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-20 01:26:17,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 01:26:17,685 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-20 01:26:17,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 01:26:17,699 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:17,699 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:26:17,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:17,915 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:17,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:17,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-07-20 01:26:17,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:17,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121377052] [2020-07-20 01:26:17,918 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@65e5b91a [2020-07-20 01:26:17,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:17,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:17,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:17,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:18,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:18,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:18,062 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 01:26:18,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121377052] [2020-07-20 01:26:18,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076192090] [2020-07-20 01:26:18,063 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@37e72f44 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:18,096 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@37e72f44 issued 3 check-sat command(s) [2020-07-20 01:26:18,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:18,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 01:26:18,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:18,142 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 01:26:18,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:18,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-07-20 01:26:18,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240953607] [2020-07-20 01:26:18,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 01:26:18,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:18,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 01:26:18,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-20 01:26:18,145 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2020-07-20 01:26:18,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:18,228 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-20 01:26:18,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 01:26:18,229 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-07-20 01:26:18,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:18,230 INFO L225 Difference]: With dead ends: 31 [2020-07-20 01:26:18,230 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 01:26:18,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-07-20 01:26:18,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 01:26:18,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-20 01:26:18,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 01:26:18,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-20 01:26:18,244 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-07-20 01:26:18,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:18,245 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-20 01:26:18,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 01:26:18,245 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-20 01:26:18,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 01:26:18,247 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:18,247 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:26:18,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:18,461 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:18,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:18,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-07-20 01:26:18,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:18,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626694740] [2020-07-20 01:26:18,463 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@65e5b91a [2020-07-20 01:26:18,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:18,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:18,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:18,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:18,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:18,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:18,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:18,714 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-20 01:26:18,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626694740] [2020-07-20 01:26:18,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646124845] [2020-07-20 01:26:18,716 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5aa39e7b No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:18,752 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5aa39e7b issued 3 check-sat command(s) [2020-07-20 01:26:18,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:18,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 01:26:18,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:18,791 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-20 01:26:18,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:18,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-07-20 01:26:18,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395588021] [2020-07-20 01:26:18,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 01:26:18,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:18,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 01:26:18,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-20 01:26:18,793 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 11 states. [2020-07-20 01:26:18,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:18,912 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-20 01:26:18,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 01:26:18,913 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-07-20 01:26:18,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:18,915 INFO L225 Difference]: With dead ends: 34 [2020-07-20 01:26:18,915 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 01:26:18,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-07-20 01:26:18,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 01:26:18,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 01:26:18,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 01:26:18,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-20 01:26:18,935 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-07-20 01:26:18,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:18,935 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-20 01:26:18,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 01:26:18,936 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-20 01:26:18,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-20 01:26:18,939 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:18,940 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:26:19,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:19,156 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:19,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:19,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-07-20 01:26:19,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:19,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999065127] [2020-07-20 01:26:19,158 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@65e5b91a [2020-07-20 01:26:19,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:19,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:19,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:19,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:19,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:19,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:19,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:19,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:19,375 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-20 01:26:19,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999065127] [2020-07-20 01:26:19,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011312733] [2020-07-20 01:26:19,376 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5f3607cb No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:19,423 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5f3607cb issued 3 check-sat command(s) [2020-07-20 01:26:19,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:19,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 01:26:19,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:19,482 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-20 01:26:19,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:19,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-07-20 01:26:19,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120752577] [2020-07-20 01:26:19,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 01:26:19,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:19,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 01:26:19,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-07-20 01:26:19,485 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 12 states. [2020-07-20 01:26:19,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:19,590 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-07-20 01:26:19,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 01:26:19,591 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-07-20 01:26:19,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:19,592 INFO L225 Difference]: With dead ends: 37 [2020-07-20 01:26:19,593 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 01:26:19,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2020-07-20 01:26:19,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 01:26:19,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-20 01:26:19,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 01:26:19,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-20 01:26:19,603 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-07-20 01:26:19,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:19,603 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-20 01:26:19,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 01:26:19,604 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-20 01:26:19,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-20 01:26:19,605 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:19,605 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:26:19,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-20 01:26:19,810 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:19,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:19,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-07-20 01:26:19,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:19,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224931126] [2020-07-20 01:26:19,813 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@65e5b91a [2020-07-20 01:26:19,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:19,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:19,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:19,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:19,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:19,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:19,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:20,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:20,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:20,059 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-20 01:26:20,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224931126] [2020-07-20 01:26:20,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868292645] [2020-07-20 01:26:20,060 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@77a0796f 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 [2020-07-20 01:26:20,105 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@77a0796f issued 3 check-sat command(s) [2020-07-20 01:26:20,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:20,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 01:26:20,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:20,164 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-20 01:26:20,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:20,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-07-20 01:26:20,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741763564] [2020-07-20 01:26:20,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 01:26:20,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:20,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 01:26:20,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-07-20 01:26:20,168 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2020-07-20 01:26:20,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:20,280 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-07-20 01:26:20,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 01:26:20,281 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-07-20 01:26:20,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:20,283 INFO L225 Difference]: With dead ends: 40 [2020-07-20 01:26:20,283 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 01:26:20,284 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2020-07-20 01:26:20,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 01:26:20,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-20 01:26:20,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 01:26:20,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-20 01:26:20,291 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-07-20 01:26:20,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:20,291 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-20 01:26:20,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 01:26:20,291 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-20 01:26:20,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-20 01:26:20,293 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:20,293 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:26:20,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:20,509 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:20,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:20,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-07-20 01:26:20,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:20,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006766130] [2020-07-20 01:26:20,510 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@65e5b91a [2020-07-20 01:26:20,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:20,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:20,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:20,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:20,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:20,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:20,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:20,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:20,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:20,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:20,742 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-20 01:26:20,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006766130] [2020-07-20 01:26:20,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704244705] [2020-07-20 01:26:20,743 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1d83fa97 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:20,783 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1d83fa97 issued 3 check-sat command(s) [2020-07-20 01:26:20,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:20,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 01:26:20,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:20,832 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-20 01:26:20,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:20,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-07-20 01:26:20,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189907763] [2020-07-20 01:26:20,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 01:26:20,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:20,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 01:26:20,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-07-20 01:26:20,835 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 14 states. [2020-07-20 01:26:20,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:20,954 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-07-20 01:26:20,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 01:26:20,955 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-07-20 01:26:20,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:20,956 INFO L225 Difference]: With dead ends: 43 [2020-07-20 01:26:20,956 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 01:26:20,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2020-07-20 01:26:20,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 01:26:20,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-20 01:26:20,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 01:26:20,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-20 01:26:20,972 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-07-20 01:26:20,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:20,973 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-20 01:26:20,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 01:26:20,973 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-20 01:26:20,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-20 01:26:20,975 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:20,976 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:26:21,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:21,177 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:21,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:21,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-07-20 01:26:21,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:21,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031819375] [2020-07-20 01:26:21,179 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@65e5b91a [2020-07-20 01:26:21,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:21,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:21,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:21,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:21,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:21,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:21,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:21,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:21,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:21,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:21,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:21,433 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-20 01:26:21,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031819375] [2020-07-20 01:26:21,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335236348] [2020-07-20 01:26:21,434 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@29cfd5bb 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 [2020-07-20 01:26:21,470 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@29cfd5bb issued 3 check-sat command(s) [2020-07-20 01:26:21,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:21,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 01:26:21,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:21,556 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-20 01:26:21,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:21,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-07-20 01:26:21,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351497137] [2020-07-20 01:26:21,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 01:26:21,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:21,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 01:26:21,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-07-20 01:26:21,561 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 15 states. [2020-07-20 01:26:21,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:21,691 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-20 01:26:21,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 01:26:21,692 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-07-20 01:26:21,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:21,693 INFO L225 Difference]: With dead ends: 46 [2020-07-20 01:26:21,693 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 01:26:21,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2020-07-20 01:26:21,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 01:26:21,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-20 01:26:21,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-20 01:26:21,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-07-20 01:26:21,705 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-07-20 01:26:21,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:21,705 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-07-20 01:26:21,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 01:26:21,705 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-20 01:26:21,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-20 01:26:21,709 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:21,709 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:26:21,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-20 01:26:21,910 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:21,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:21,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-07-20 01:26:21,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:21,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013118966] [2020-07-20 01:26:21,912 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@65e5b91a [2020-07-20 01:26:21,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:21,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:21,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:21,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:21,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:22,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:22,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:22,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:22,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:22,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:22,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:22,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:22,181 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-20 01:26:22,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013118966] [2020-07-20 01:26:22,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327523999] [2020-07-20 01:26:22,182 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b197e8d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:22,221 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b197e8d issued 3 check-sat command(s) [2020-07-20 01:26:22,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:22,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 01:26:22,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:22,293 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-20 01:26:22,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:22,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2020-07-20 01:26:22,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211228540] [2020-07-20 01:26:22,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 01:26:22,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:22,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 01:26:22,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-07-20 01:26:22,298 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 16 states. [2020-07-20 01:26:22,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:22,454 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-07-20 01:26:22,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 01:26:22,455 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 67 [2020-07-20 01:26:22,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:22,457 INFO L225 Difference]: With dead ends: 49 [2020-07-20 01:26:22,457 INFO L226 Difference]: Without dead ends: 45 [2020-07-20 01:26:22,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=226, Invalid=424, Unknown=0, NotChecked=0, Total=650 [2020-07-20 01:26:22,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-20 01:26:22,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-20 01:26:22,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 01:26:22,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-20 01:26:22,465 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-07-20 01:26:22,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:22,466 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-20 01:26:22,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 01:26:22,466 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-20 01:26:22,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-20 01:26:22,468 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:22,468 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:26:22,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:22,682 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:22,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:22,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-07-20 01:26:22,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:22,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727065463] [2020-07-20 01:26:22,684 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@65e5b91a [2020-07-20 01:26:22,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:22,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:22,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:22,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:22,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:22,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:22,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:22,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:22,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:22,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:22,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:22,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:22,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:23,035 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-20 01:26:23,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727065463] [2020-07-20 01:26:23,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022199871] [2020-07-20 01:26:23,036 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2dc1c740 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 [2020-07-20 01:26:23,077 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2dc1c740 issued 3 check-sat command(s) [2020-07-20 01:26:23,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:23,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 01:26:23,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:23,172 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-20 01:26:23,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:23,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-07-20 01:26:23,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292313402] [2020-07-20 01:26:23,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 01:26:23,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:23,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 01:26:23,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-07-20 01:26:23,175 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 17 states. [2020-07-20 01:26:23,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:23,394 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-07-20 01:26:23,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 01:26:23,396 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2020-07-20 01:26:23,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:23,398 INFO L225 Difference]: With dead ends: 52 [2020-07-20 01:26:23,398 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 01:26:23,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2020-07-20 01:26:23,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 01:26:23,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-20 01:26:23,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 01:26:23,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-07-20 01:26:23,419 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-07-20 01:26:23,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:23,419 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-07-20 01:26:23,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 01:26:23,420 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-07-20 01:26:23,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-20 01:26:23,424 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:23,424 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:26:23,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:23,639 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:23,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:23,640 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-07-20 01:26:23,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:23,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748812219] [2020-07-20 01:26:23,640 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@65e5b91a [2020-07-20 01:26:23,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:23,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:23,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:23,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:23,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:23,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:23,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:23,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:23,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:23,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:23,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:23,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:23,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:24,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:24,056 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-20 01:26:24,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748812219] [2020-07-20 01:26:24,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285787861] [2020-07-20 01:26:24,057 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@230117cc No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:24,111 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@230117cc issued 3 check-sat command(s) [2020-07-20 01:26:24,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:24,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 01:26:24,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:24,182 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-20 01:26:24,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:24,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-07-20 01:26:24,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859936648] [2020-07-20 01:26:24,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 01:26:24,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:24,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 01:26:24,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-07-20 01:26:24,185 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 18 states. [2020-07-20 01:26:24,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:24,394 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-07-20 01:26:24,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 01:26:24,394 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2020-07-20 01:26:24,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:24,396 INFO L225 Difference]: With dead ends: 55 [2020-07-20 01:26:24,396 INFO L226 Difference]: Without dead ends: 51 [2020-07-20 01:26:24,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=305, Invalid=565, Unknown=0, NotChecked=0, Total=870 [2020-07-20 01:26:24,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-20 01:26:24,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-07-20 01:26:24,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 01:26:24,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-07-20 01:26:24,417 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-07-20 01:26:24,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:24,417 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-07-20 01:26:24,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 01:26:24,418 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-07-20 01:26:24,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-20 01:26:24,419 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:24,419 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:26:24,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-07-20 01:26:24,633 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:24,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:24,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-07-20 01:26:24,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:24,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851010593] [2020-07-20 01:26:24,634 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@65e5b91a [2020-07-20 01:26:24,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:24,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:24,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:24,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:24,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:24,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:24,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:24,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:24,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:24,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:24,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:24,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:24,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:24,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:24,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:25,029 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-20 01:26:25,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851010593] [2020-07-20 01:26:25,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381892952] [2020-07-20 01:26:25,030 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7f19b4c2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:25,074 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7f19b4c2 issued 3 check-sat command(s) [2020-07-20 01:26:25,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:25,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-20 01:26:25,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:25,140 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-20 01:26:25,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:25,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-07-20 01:26:25,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150061205] [2020-07-20 01:26:25,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 01:26:25,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:25,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 01:26:25,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2020-07-20 01:26:25,144 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 19 states. [2020-07-20 01:26:25,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:25,358 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-07-20 01:26:25,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 01:26:25,358 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 85 [2020-07-20 01:26:25,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:25,360 INFO L225 Difference]: With dead ends: 58 [2020-07-20 01:26:25,360 INFO L226 Difference]: Without dead ends: 54 [2020-07-20 01:26:25,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=349, Invalid=643, Unknown=0, NotChecked=0, Total=992 [2020-07-20 01:26:25,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-20 01:26:25,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-07-20 01:26:25,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-20 01:26:25,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-07-20 01:26:25,384 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-07-20 01:26:25,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:25,384 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-07-20 01:26:25,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 01:26:25,384 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-07-20 01:26:25,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-07-20 01:26:25,385 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:25,386 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:26:25,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-20 01:26:25,600 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:25,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:25,601 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-07-20 01:26:25,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:25,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992429473] [2020-07-20 01:26:25,602 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@65e5b91a [2020-07-20 01:26:25,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:25,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:25,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:25,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:25,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:25,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:25,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:25,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:25,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:25,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:25,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:25,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:25,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:26,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:26,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:26,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:26,154 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-20 01:26:26,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992429473] [2020-07-20 01:26:26,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325507374] [2020-07-20 01:26:26,155 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@8156e1b No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:26,220 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@8156e1b issued 3 check-sat command(s) [2020-07-20 01:26:26,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:26,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-20 01:26:26,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:26,294 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-20 01:26:26,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:26,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-07-20 01:26:26,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309217850] [2020-07-20 01:26:26,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 01:26:26,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:26,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 01:26:26,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-07-20 01:26:26,298 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 20 states. [2020-07-20 01:26:26,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:26,531 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-07-20 01:26:26,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 01:26:26,533 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 91 [2020-07-20 01:26:26,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:26,534 INFO L225 Difference]: With dead ends: 61 [2020-07-20 01:26:26,534 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 01:26:26,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=396, Invalid=726, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 01:26:26,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 01:26:26,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-20 01:26:26,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 01:26:26,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-07-20 01:26:26,551 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-07-20 01:26:26,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:26,552 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-07-20 01:26:26,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 01:26:26,554 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-07-20 01:26:26,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-07-20 01:26:26,556 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:26,556 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:26:26,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-20 01:26:26,773 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:26,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:26,774 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-07-20 01:26:26,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:26,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756351787] [2020-07-20 01:26:26,775 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@65e5b91a [2020-07-20 01:26:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:26,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:26,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:26,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:26,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:26,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:27,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:27,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:27,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:27,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:27,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:27,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:27,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:27,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:27,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:27,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:27,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:27,432 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-20 01:26:27,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756351787] [2020-07-20 01:26:27,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851157781] [2020-07-20 01:26:27,433 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@13fa0b14 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:27,474 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@13fa0b14 issued 3 check-sat command(s) [2020-07-20 01:26:27,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:27,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-20 01:26:27,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:27,550 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-20 01:26:27,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:27,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-07-20 01:26:27,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860157815] [2020-07-20 01:26:27,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 01:26:27,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:27,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 01:26:27,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2020-07-20 01:26:27,555 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 21 states. [2020-07-20 01:26:27,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:27,809 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-07-20 01:26:27,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 01:26:27,809 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 97 [2020-07-20 01:26:27,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:27,811 INFO L225 Difference]: With dead ends: 64 [2020-07-20 01:26:27,811 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 01:26:27,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=446, Invalid=814, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 01:26:27,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 01:26:27,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-20 01:26:27,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 01:26:27,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-07-20 01:26:27,823 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-07-20 01:26:27,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:27,825 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-07-20 01:26:27,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 01:26:27,825 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-07-20 01:26:27,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-07-20 01:26:27,826 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:27,826 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:26:28,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:28,036 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:28,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:28,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-07-20 01:26:28,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:28,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829504411] [2020-07-20 01:26:28,037 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@65e5b91a [2020-07-20 01:26:28,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:28,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:28,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:28,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:28,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:28,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:28,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:28,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:28,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:28,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:28,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:28,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:28,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:28,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:28,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:28,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:28,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:28,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:28,655 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-20 01:26:28,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829504411] [2020-07-20 01:26:28,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238259761] [2020-07-20 01:26:28,656 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@40b80753 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:28,706 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@40b80753 issued 3 check-sat command(s) [2020-07-20 01:26:28,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:28,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 34 conjunts are in the unsatisfiable core [2020-07-20 01:26:28,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:28,776 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-20 01:26:28,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:28,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-07-20 01:26:28,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474829847] [2020-07-20 01:26:28,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 01:26:28,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:28,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 01:26:28,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2020-07-20 01:26:28,780 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 22 states. [2020-07-20 01:26:28,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:28,997 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-07-20 01:26:28,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 01:26:28,997 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 103 [2020-07-20 01:26:28,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:29,000 INFO L225 Difference]: With dead ends: 67 [2020-07-20 01:26:29,000 INFO L226 Difference]: Without dead ends: 63 [2020-07-20 01:26:29,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=499, Invalid=907, Unknown=0, NotChecked=0, Total=1406 [2020-07-20 01:26:29,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-20 01:26:29,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-07-20 01:26:29,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-20 01:26:29,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-07-20 01:26:29,008 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-07-20 01:26:29,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:29,012 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-07-20 01:26:29,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 01:26:29,012 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-07-20 01:26:29,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-20 01:26:29,015 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:29,015 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:26:29,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-20 01:26:29,216 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:29,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:29,216 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2020-07-20 01:26:29,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:29,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529965621] [2020-07-20 01:26:29,217 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@65e5b91a [2020-07-20 01:26:29,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:29,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:29,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:29,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:29,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:29,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:29,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:29,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:29,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:29,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:29,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:29,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:29,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:29,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:29,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:29,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:29,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:29,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:29,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:29,868 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-07-20 01:26:29,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529965621] [2020-07-20 01:26:29,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501302426] [2020-07-20 01:26:29,869 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@552bbc5c No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:29,932 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@552bbc5c issued 3 check-sat command(s) [2020-07-20 01:26:29,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:29,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 36 conjunts are in the unsatisfiable core [2020-07-20 01:26:29,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:29,998 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-07-20 01:26:30,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:30,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-07-20 01:26:30,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525868792] [2020-07-20 01:26:30,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 01:26:30,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:30,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 01:26:30,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2020-07-20 01:26:30,010 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 23 states. [2020-07-20 01:26:30,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:30,286 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-07-20 01:26:30,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 01:26:30,286 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 109 [2020-07-20 01:26:30,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:30,288 INFO L225 Difference]: With dead ends: 70 [2020-07-20 01:26:30,288 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 01:26:30,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=555, Invalid=1005, Unknown=0, NotChecked=0, Total=1560 [2020-07-20 01:26:30,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 01:26:30,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-07-20 01:26:30,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-20 01:26:30,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-07-20 01:26:30,297 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-07-20 01:26:30,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:30,297 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-07-20 01:26:30,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 01:26:30,298 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-07-20 01:26:30,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-07-20 01:26:30,299 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:30,299 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:26:30,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-07-20 01:26:30,513 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:30,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:30,514 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2020-07-20 01:26:30,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:30,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885430007] [2020-07-20 01:26:30,514 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@65e5b91a [2020-07-20 01:26:30,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:30,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:30,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:30,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:30,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:30,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:30,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:30,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:30,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:30,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:30,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:30,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:30,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:30,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:30,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:30,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:31,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:31,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:31,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:31,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:31,193 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-07-20 01:26:31,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885430007] [2020-07-20 01:26:31,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615889740] [2020-07-20 01:26:31,194 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@452777b2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:31,246 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@452777b2 issued 3 check-sat command(s) [2020-07-20 01:26:31,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:31,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 38 conjunts are in the unsatisfiable core [2020-07-20 01:26:31,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:31,335 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-07-20 01:26:31,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:31,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2020-07-20 01:26:31,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543733037] [2020-07-20 01:26:31,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 01:26:31,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:31,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 01:26:31,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2020-07-20 01:26:31,339 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 24 states. [2020-07-20 01:26:31,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:31,637 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-07-20 01:26:31,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 01:26:31,637 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 115 [2020-07-20 01:26:31,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:31,638 INFO L225 Difference]: With dead ends: 73 [2020-07-20 01:26:31,639 INFO L226 Difference]: Without dead ends: 69 [2020-07-20 01:26:31,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=614, Invalid=1108, Unknown=0, NotChecked=0, Total=1722 [2020-07-20 01:26:31,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-20 01:26:31,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-07-20 01:26:31,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-20 01:26:31,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-07-20 01:26:31,649 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-07-20 01:26:31,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:31,650 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-07-20 01:26:31,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 01:26:31,650 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-07-20 01:26:31,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-20 01:26:31,652 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:31,652 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:26:31,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-20 01:26:31,853 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:31,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:31,853 INFO L82 PathProgramCache]: Analyzing trace with hash 130115453, now seen corresponding path program 18 times [2020-07-20 01:26:31,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:31,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663887563] [2020-07-20 01:26:31,854 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@65e5b91a [2020-07-20 01:26:31,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:31,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:31,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:31,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:32,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:32,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:32,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:32,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:32,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:32,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:32,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:32,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:32,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:32,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:32,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:32,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:32,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:32,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:32,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:32,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:32,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:32,718 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-07-20 01:26:32,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663887563] [2020-07-20 01:26:32,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040153642] [2020-07-20 01:26:32,719 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2e5fbda4 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:32,770 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2e5fbda4 issued 3 check-sat command(s) [2020-07-20 01:26:32,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:32,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 40 conjunts are in the unsatisfiable core [2020-07-20 01:26:32,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:32,842 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-07-20 01:26:32,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:32,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2020-07-20 01:26:32,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172862694] [2020-07-20 01:26:32,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 01:26:32,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:32,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 01:26:32,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=362, Unknown=0, NotChecked=0, Total=600 [2020-07-20 01:26:32,845 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 25 states. [2020-07-20 01:26:33,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:33,139 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-07-20 01:26:33,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 01:26:33,140 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 121 [2020-07-20 01:26:33,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:33,142 INFO L225 Difference]: With dead ends: 76 [2020-07-20 01:26:33,142 INFO L226 Difference]: Without dead ends: 72 [2020-07-20 01:26:33,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=676, Invalid=1216, Unknown=0, NotChecked=0, Total=1892 [2020-07-20 01:26:33,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-20 01:26:33,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-07-20 01:26:33,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-20 01:26:33,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-07-20 01:26:33,147 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-07-20 01:26:33,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:33,148 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-07-20 01:26:33,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 01:26:33,148 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-07-20 01:26:33,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-07-20 01:26:33,149 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:33,150 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:26:33,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:33,358 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:33,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:33,359 INFO L82 PathProgramCache]: Analyzing trace with hash -2010955025, now seen corresponding path program 19 times [2020-07-20 01:26:33,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:33,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332789116] [2020-07-20 01:26:33,359 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@65e5b91a [2020-07-20 01:26:33,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:33,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:33,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:33,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:33,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:33,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:33,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:33,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:33,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:33,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:33,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:33,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:33,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:33,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:33,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:33,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:33,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:33,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:34,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:34,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:34,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:34,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:34,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-07-20 01:26:34,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332789116] [2020-07-20 01:26:34,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088722614] [2020-07-20 01:26:34,327 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dd5329e No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:34,414 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dd5329e issued 3 check-sat command(s) [2020-07-20 01:26:34,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:34,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 42 conjunts are in the unsatisfiable core [2020-07-20 01:26:34,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:34,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-07-20 01:26:34,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:34,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-07-20 01:26:34,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410652562] [2020-07-20 01:26:34,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 01:26:34,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:34,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 01:26:34,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=390, Unknown=0, NotChecked=0, Total=650 [2020-07-20 01:26:34,532 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 26 states. [2020-07-20 01:26:34,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:34,980 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-07-20 01:26:34,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 01:26:34,981 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 127 [2020-07-20 01:26:34,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:34,982 INFO L225 Difference]: With dead ends: 79 [2020-07-20 01:26:34,983 INFO L226 Difference]: Without dead ends: 75 [2020-07-20 01:26:34,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=1329, Unknown=0, NotChecked=0, Total=2070 [2020-07-20 01:26:34,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-20 01:26:34,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-07-20 01:26:34,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-20 01:26:34,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-07-20 01:26:34,997 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-07-20 01:26:34,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:34,998 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-07-20 01:26:34,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 01:26:34,998 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-07-20 01:26:35,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-07-20 01:26:35,001 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:35,001 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:26:35,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:35,216 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:35,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:35,217 INFO L82 PathProgramCache]: Analyzing trace with hash -799288067, now seen corresponding path program 20 times [2020-07-20 01:26:35,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:35,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874575322] [2020-07-20 01:26:35,218 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@65e5b91a [2020-07-20 01:26:35,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:35,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:35,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:35,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:35,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:35,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:35,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:35,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:36,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:36,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:36,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:36,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:36,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:36,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:36,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:36,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:36,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:36,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:36,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:37,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:37,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:37,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:37,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:37,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-07-20 01:26:37,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874575322] [2020-07-20 01:26:37,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821031128] [2020-07-20 01:26:37,517 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@42f548b1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:37,576 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@42f548b1 issued 4 check-sat command(s) [2020-07-20 01:26:37,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:37,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 87 conjunts are in the unsatisfiable core [2020-07-20 01:26:37,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:37,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-07-20 01:26:37,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:37,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2020-07-20 01:26:37,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804070233] [2020-07-20 01:26:37,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-07-20 01:26:37,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:37,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-07-20 01:26:37,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2020-07-20 01:26:37,763 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 45 states. [2020-07-20 01:26:38,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:38,661 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-07-20 01:26:38,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-07-20 01:26:38,661 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 133 [2020-07-20 01:26:38,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:38,663 INFO L225 Difference]: With dead ends: 82 [2020-07-20 01:26:38,663 INFO L226 Difference]: Without dead ends: 78 [2020-07-20 01:26:38,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 175 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2020-07-20 01:26:38,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-20 01:26:38,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-07-20 01:26:38,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-20 01:26:38,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-07-20 01:26:38,669 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2020-07-20 01:26:38,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:38,669 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-07-20 01:26:38,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-07-20 01:26:38,670 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-07-20 01:26:38,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-07-20 01:26:38,671 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:38,671 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:26:38,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-07-20 01:26:38,882 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:38,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:38,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1226192145, now seen corresponding path program 21 times [2020-07-20 01:26:38,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:38,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23553171] [2020-07-20 01:26:38,883 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@65e5b91a [2020-07-20 01:26:38,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:38,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:38,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:39,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:39,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:39,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:39,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:39,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:39,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:39,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:39,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:39,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:39,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:39,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:39,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:39,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:39,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:39,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:39,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:39,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:39,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:39,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:39,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:39,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:39,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 630 proven. 42 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-07-20 01:26:39,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23553171] [2020-07-20 01:26:39,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960864126] [2020-07-20 01:26:39,912 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@539aa3fa No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:39,990 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@539aa3fa issued 3 check-sat command(s) [2020-07-20 01:26:39,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:39,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 46 conjunts are in the unsatisfiable core [2020-07-20 01:26:39,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:40,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 672 proven. 0 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-07-20 01:26:40,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 01:26:40,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [26] total 29 [2020-07-20 01:26:40,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756050826] [2020-07-20 01:26:40,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 01:26:40,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:40,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 01:26:40,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=523, Unknown=0, NotChecked=0, Total=812 [2020-07-20 01:26:40,122 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 26 states. [2020-07-20 01:26:40,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:40,713 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2020-07-20 01:26:40,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 01:26:40,715 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 139 [2020-07-20 01:26:40,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:40,715 INFO L225 Difference]: With dead ends: 78 [2020-07-20 01:26:40,715 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 01:26:40,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=839, Invalid=1711, Unknown=0, NotChecked=0, Total=2550 [2020-07-20 01:26:40,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 01:26:40,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 01:26:40,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 01:26:40,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 01:26:40,718 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 139 [2020-07-20 01:26:40,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:40,718 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 01:26:40,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 01:26:40,718 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 01:26:40,719 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 01:26:40,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-07-20 01:26:40,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 01:26:40,954 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 01:26:40,955 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 01:26:40,955 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 01:26:40,955 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 01:26:40,955 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 01:26:40,955 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 01:26:40,955 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2020-07-20 01:26:40,955 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 9 15) the Hoare annotation is: true [2020-07-20 01:26:40,956 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 15) no Hoare annotation was computed. [2020-07-20 01:26:40,956 INFO L268 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-07-20 01:26:40,956 INFO L268 CegarLoopResult]: For program point L12(lines 12 14) no Hoare annotation was computed. [2020-07-20 01:26:40,956 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= 20 main_~input~0) (<= main_~input~0 20)) [2020-07-20 01:26:40,956 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-07-20 01:26:40,956 INFO L268 CegarLoopResult]: For program point L12-2(lines 9 15) no Hoare annotation was computed. [2020-07-20 01:26:40,956 INFO L268 CegarLoopResult]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2020-07-20 01:26:40,956 INFO L268 CegarLoopResult]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2020-07-20 01:26:40,957 INFO L271 CegarLoopResult]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2020-07-20 01:26:40,957 INFO L264 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: (= |id_#in~x| id_~x) [2020-07-20 01:26:40,957 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-20 01:26:40,957 INFO L268 CegarLoopResult]: For program point L6-1(line 6) no Hoare annotation was computed. [2020-07-20 01:26:40,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:26:40 BoogieIcfgContainer [2020-07-20 01:26:40,965 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 01:26:40,970 INFO L168 Benchmark]: Toolchain (without parser) took 25405.18 ms. Allocated memory was 145.8 MB in the beginning and 535.3 MB in the end (delta: 389.5 MB). Free memory was 103.7 MB in the beginning and 193.2 MB in the end (delta: -89.5 MB). Peak memory consumption was 300.0 MB. Max. memory is 7.1 GB. [2020-07-20 01:26:40,971 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 145.8 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 01:26:40,975 INFO L168 Benchmark]: CACSL2BoogieTranslator took 233.37 ms. Allocated memory is still 145.8 MB. Free memory was 103.2 MB in the beginning and 94.1 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-07-20 01:26:40,976 INFO L168 Benchmark]: Boogie Preprocessor took 22.20 ms. Allocated memory is still 145.8 MB. Free memory was 94.1 MB in the beginning and 92.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-20 01:26:40,978 INFO L168 Benchmark]: RCFGBuilder took 346.81 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 92.8 MB in the beginning and 171.1 MB in the end (delta: -78.3 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-20 01:26:40,979 INFO L168 Benchmark]: TraceAbstraction took 24796.82 ms. Allocated memory was 202.9 MB in the beginning and 535.3 MB in the end (delta: 332.4 MB). Free memory was 170.5 MB in the beginning and 193.2 MB in the end (delta: -22.7 MB). Peak memory consumption was 309.7 MB. Max. memory is 7.1 GB. [2020-07-20 01:26:40,981 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 145.8 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 233.37 ms. Allocated memory is still 145.8 MB. Free memory was 103.2 MB in the beginning and 94.1 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 22.20 ms. Allocated memory is still 145.8 MB. Free memory was 94.1 MB in the beginning and 92.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 346.81 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 92.8 MB in the beginning and 171.1 MB in the end (delta: -78.3 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 24796.82 ms. Allocated memory was 202.9 MB in the beginning and 535.3 MB in the end (delta: 332.4 MB). Free memory was 170.5 MB in the beginning and 193.2 MB in the end (delta: -22.7 MB). Peak memory consumption was 309.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: 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 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 24.6s, OverallIterations: 22, TraceHistogramMax: 22, AutomataDifference: 5.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 370 SDtfs, 881 SDslu, 3375 SDs, 0 SdLazy, 2199 SolverSat, 230 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2760 GetRequests, 2167 SyntacticMatches, 3 SemanticMatches, 590 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2913 ImplicationChecksByTransitivity, 8.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=78occurred in iteration=21, 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, 22 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 15 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 12.7s InterpolantComputationTime, 3331 NumberOfCodeBlocks, 2978 NumberOfCodeBlocksAsserted, 86 NumberOfCheckSat, 3288 ConstructedInterpolants, 0 QuantifiedInterpolants, 836136 SizeOfPredicates, 252 NumberOfNonLiveVariables, 3360 ConjunctsInSsa, 589 ConjunctsInUnsatCore, 43 InterpolantComputations, 2 PerfectInterpolantSequences, 11466/20328 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...