/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 01:05:35,092 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 01:05:35,097 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 01:05:35,129 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 01:05:35,129 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 01:05:35,133 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 01:05:35,136 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 01:05:35,139 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 01:05:35,142 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 01:05:35,144 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 01:05:35,145 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 01:05:35,146 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 01:05:35,147 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 01:05:35,148 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 01:05:35,152 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 01:05:35,153 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 01:05:35,155 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 01:05:35,157 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 01:05:35,159 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 01:05:35,162 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 01:05:35,164 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 01:05:35,166 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 01:05:35,167 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 01:05:35,168 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 01:05:35,172 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 01:05:35,183 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 01:05:35,185 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 01:05:35,187 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 01:05:35,195 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 [2020-07-21 01:05:35,225 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 01:05:35,229 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 01:05:35,233 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 01:05:35,234 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 01:05:35,234 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 01:05:35,235 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 01:05:35,235 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 01:05:35,237 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 01:05:35,237 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 01:05:35,237 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 01:05:35,239 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 01:05:35,240 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 01:05:35,240 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 01:05:35,241 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 01:05:35,241 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 01:05:35,242 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 01:05:35,242 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 01:05:35,242 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 01:05:35,243 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 01:05:35,243 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 01:05:35,244 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 01:05:35,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:05:35,245 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 01:05:35,245 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 01:05:35,245 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 01:05:35,246 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 01:05:35,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:35,246 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 01:05:35,246 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 01:05:35,246 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS 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 [2020-07-21 01:05:35,751 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 01:05:35,791 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 01:05:35,800 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 01:05:35,807 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 01:05:35,808 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 01:05:35,810 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_5.c [2020-07-21 01:05:35,948 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89dd87bb7/7df91564f3354f819099d2908d0116ec/FLAGd60085ff0 [2020-07-21 01:05:36,769 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 01:05:36,770 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_5.c [2020-07-21 01:05:36,782 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89dd87bb7/7df91564f3354f819099d2908d0116ec/FLAGd60085ff0 [2020-07-21 01:05:36,805 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89dd87bb7/7df91564f3354f819099d2908d0116ec [2020-07-21 01:05:36,827 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 01:05:36,834 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 01:05:36,835 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 01:05:36,836 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 01:05:36,842 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 01:05:36,844 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:05:36" (1/1) ... [2020-07-21 01:05:36,849 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@673f49e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:05:36, skipping insertion in model container [2020-07-21 01:05:36,849 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:05:36" (1/1) ... [2020-07-21 01:05:36,862 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 01:05:36,896 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:05:37,132 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:05:37,141 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:05:37,170 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:05:37,189 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:05:37,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:05:37 WrapperNode [2020-07-21 01:05:37,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:05:37,192 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:05:37,193 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:05:37,193 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:05:37,212 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:05:37" (1/1) ... [2020-07-21 01:05:37,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:05:37" (1/1) ... [2020-07-21 01:05:37,222 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:05:37" (1/1) ... [2020-07-21 01:05:37,223 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:05:37" (1/1) ... [2020-07-21 01:05:37,227 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:05:37" (1/1) ... [2020-07-21 01:05:37,357 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:05:37" (1/1) ... [2020-07-21 01:05:37,359 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:05:37" (1/1) ... [2020-07-21 01:05:37,375 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:05:37,376 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:05:37,376 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:05:37,376 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:05:37,380 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:05:37" (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 [2020-07-21 01:05:37,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:05:37,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:05:37,504 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:05:37,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:05:37,505 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 01:05:37,505 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:05:37,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:05:37,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:05:37,920 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:05:37,922 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 01:05:37,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:05:37 BoogieIcfgContainer [2020-07-21 01:05:37,930 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:05:37,932 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:05:37,933 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:05:37,943 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:05:37,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:05:36" (1/3) ... [2020-07-21 01:05:37,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@333f0064 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:05:37, skipping insertion in model container [2020-07-21 01:05:37,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:05:37" (2/3) ... [2020-07-21 01:05:37,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@333f0064 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:05:37, skipping insertion in model container [2020-07-21 01:05:37,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:05:37" (3/3) ... [2020-07-21 01:05:37,953 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_5.c [2020-07-21 01:05:37,973 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:05:37,990 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 01:05:38,036 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 01:05:38,087 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:05:38,087 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:05:38,088 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:05:38,088 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:05:38,088 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:05:38,088 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:05:38,089 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:05:38,089 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:05:38,121 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-07-21 01:05:38,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 01:05:38,134 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:38,135 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:05:38,137 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:38,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:38,147 INFO L82 PathProgramCache]: Analyzing trace with hash 316328318, now seen corresponding path program 1 times [2020-07-21 01:05:38,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:38,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147434222] [2020-07-21 01:05:38,160 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:38,319 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:05:38,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:38,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:05:38,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:38,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:05:38,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:38,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147434222] [2020-07-21 01:05:38,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:38,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:38,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698741281] [2020-07-21 01:05:38,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:38,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:38,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:38,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:38,428 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-07-21 01:05:38,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:38,506 INFO L93 Difference]: Finished difference Result 57 states and 90 transitions. [2020-07-21 01:05:38,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:38,510 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-07-21 01:05:38,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:38,535 INFO L225 Difference]: With dead ends: 57 [2020-07-21 01:05:38,535 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 01:05:38,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:38,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 01:05:38,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2020-07-21 01:05:38,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 01:05:38,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 49 transitions. [2020-07-21 01:05:38,605 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 49 transitions. Word has length 15 [2020-07-21 01:05:38,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:38,607 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 49 transitions. [2020-07-21 01:05:38,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:38,607 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 49 transitions. [2020-07-21 01:05:38,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 01:05:38,609 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:38,609 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:05:38,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:38,827 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:38,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:38,829 INFO L82 PathProgramCache]: Analyzing trace with hash -493018308, now seen corresponding path program 1 times [2020-07-21 01:05:38,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:38,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711491874] [2020-07-21 01:05:38,830 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:38,892 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:05:38,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:38,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:05:38,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:38,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:05:38,913 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:38,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711491874] [2020-07-21 01:05:38,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:38,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:38,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776638092] [2020-07-21 01:05:38,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:38,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:38,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:38,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:38,923 INFO L87 Difference]: Start difference. First operand 30 states and 49 transitions. Second operand 3 states. [2020-07-21 01:05:38,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:38,977 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2020-07-21 01:05:38,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:38,978 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-07-21 01:05:38,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:38,980 INFO L225 Difference]: With dead ends: 67 [2020-07-21 01:05:38,981 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 01:05:38,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:38,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 01:05:38,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-07-21 01:05:38,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 01:05:38,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 65 transitions. [2020-07-21 01:05:38,996 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 65 transitions. Word has length 15 [2020-07-21 01:05:38,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:38,996 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 65 transitions. [2020-07-21 01:05:38,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:38,997 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 65 transitions. [2020-07-21 01:05:38,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 01:05:38,998 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:38,998 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:05:39,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:39,214 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:39,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:39,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1216458266, now seen corresponding path program 1 times [2020-07-21 01:05:39,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:39,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88573542] [2020-07-21 01:05:39,216 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:39,284 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:05:39,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:39,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:05:39,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:39,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:05:39,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:39,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88573542] [2020-07-21 01:05:39,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:39,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:39,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755383957] [2020-07-21 01:05:39,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:39,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:39,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:39,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:39,318 INFO L87 Difference]: Start difference. First operand 40 states and 65 transitions. Second operand 3 states. [2020-07-21 01:05:39,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:39,359 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-07-21 01:05:39,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:39,360 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-07-21 01:05:39,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:39,362 INFO L225 Difference]: With dead ends: 63 [2020-07-21 01:05:39,362 INFO L226 Difference]: Without dead ends: 45 [2020-07-21 01:05:39,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:39,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-21 01:05:39,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2020-07-21 01:05:39,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-21 01:05:39,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 67 transitions. [2020-07-21 01:05:39,378 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 67 transitions. Word has length 16 [2020-07-21 01:05:39,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:39,379 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 67 transitions. [2020-07-21 01:05:39,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:39,379 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 67 transitions. [2020-07-21 01:05:39,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 01:05:39,380 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:39,381 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:05:39,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:39,596 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:39,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:39,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1896516636, now seen corresponding path program 1 times [2020-07-21 01:05:39,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:39,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941039250] [2020-07-21 01:05:39,597 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:39,647 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:05:39,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:39,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:05:39,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:39,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:05:39,666 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:39,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941039250] [2020-07-21 01:05:39,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:39,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:39,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505142034] [2020-07-21 01:05:39,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:39,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:39,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:39,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:39,670 INFO L87 Difference]: Start difference. First operand 43 states and 67 transitions. Second operand 3 states. [2020-07-21 01:05:39,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:39,716 INFO L93 Difference]: Finished difference Result 76 states and 120 transitions. [2020-07-21 01:05:39,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:39,717 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-07-21 01:05:39,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:39,719 INFO L225 Difference]: With dead ends: 76 [2020-07-21 01:05:39,720 INFO L226 Difference]: Without dead ends: 74 [2020-07-21 01:05:39,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:39,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-07-21 01:05:39,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2020-07-21 01:05:39,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 01:05:39,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 88 transitions. [2020-07-21 01:05:39,734 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 88 transitions. Word has length 16 [2020-07-21 01:05:39,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:39,735 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 88 transitions. [2020-07-21 01:05:39,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:39,736 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 88 transitions. [2020-07-21 01:05:39,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 01:05:39,737 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:39,737 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:05:39,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:39,953 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:39,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:39,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1087170010, now seen corresponding path program 1 times [2020-07-21 01:05:39,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:39,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632994256] [2020-07-21 01:05:39,956 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:40,003 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:05:40,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:40,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:05:40,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:40,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:05:40,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:40,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632994256] [2020-07-21 01:05:40,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:40,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:40,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184284086] [2020-07-21 01:05:40,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:40,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:40,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:40,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:40,044 INFO L87 Difference]: Start difference. First operand 56 states and 88 transitions. Second operand 3 states. [2020-07-21 01:05:40,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:40,113 INFO L93 Difference]: Finished difference Result 124 states and 198 transitions. [2020-07-21 01:05:40,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:40,118 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-07-21 01:05:40,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:40,123 INFO L225 Difference]: With dead ends: 124 [2020-07-21 01:05:40,123 INFO L226 Difference]: Without dead ends: 76 [2020-07-21 01:05:40,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:40,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-21 01:05:40,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-07-21 01:05:40,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-07-21 01:05:40,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 114 transitions. [2020-07-21 01:05:40,156 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 114 transitions. Word has length 16 [2020-07-21 01:05:40,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:40,157 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 114 transitions. [2020-07-21 01:05:40,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:40,157 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 114 transitions. [2020-07-21 01:05:40,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 01:05:40,159 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:40,159 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:05:40,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:40,375 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:40,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:40,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1337311087, now seen corresponding path program 1 times [2020-07-21 01:05:40,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:40,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530441932] [2020-07-21 01:05:40,378 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:40,423 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:05:40,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:40,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:05:40,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:40,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:05:40,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:40,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530441932] [2020-07-21 01:05:40,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:40,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:40,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176415368] [2020-07-21 01:05:40,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:40,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:40,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:40,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:40,477 INFO L87 Difference]: Start difference. First operand 74 states and 114 transitions. Second operand 3 states. [2020-07-21 01:05:40,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:40,514 INFO L93 Difference]: Finished difference Result 111 states and 169 transitions. [2020-07-21 01:05:40,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:40,514 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-07-21 01:05:40,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:40,517 INFO L225 Difference]: With dead ends: 111 [2020-07-21 01:05:40,517 INFO L226 Difference]: Without dead ends: 78 [2020-07-21 01:05:40,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:40,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-21 01:05:40,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-07-21 01:05:40,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-21 01:05:40,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 114 transitions. [2020-07-21 01:05:40,531 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 114 transitions. Word has length 17 [2020-07-21 01:05:40,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:40,532 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 114 transitions. [2020-07-21 01:05:40,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:40,532 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 114 transitions. [2020-07-21 01:05:40,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 01:05:40,534 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:40,534 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:05:40,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:40,750 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:40,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:40,751 INFO L82 PathProgramCache]: Analyzing trace with hash -657252717, now seen corresponding path program 1 times [2020-07-21 01:05:40,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:40,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220602273] [2020-07-21 01:05:40,753 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:40,797 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:05:40,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:40,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:05:40,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:40,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:05:40,820 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:40,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220602273] [2020-07-21 01:05:40,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:40,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:40,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164880599] [2020-07-21 01:05:40,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:40,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:40,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:40,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:40,828 INFO L87 Difference]: Start difference. First operand 76 states and 114 transitions. Second operand 3 states. [2020-07-21 01:05:40,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:40,866 INFO L93 Difference]: Finished difference Result 132 states and 200 transitions. [2020-07-21 01:05:40,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:40,867 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-07-21 01:05:40,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:40,869 INFO L225 Difference]: With dead ends: 132 [2020-07-21 01:05:40,874 INFO L226 Difference]: Without dead ends: 130 [2020-07-21 01:05:40,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:40,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-07-21 01:05:40,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 104. [2020-07-21 01:05:40,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-07-21 01:05:40,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 154 transitions. [2020-07-21 01:05:40,916 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 154 transitions. Word has length 17 [2020-07-21 01:05:40,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:40,920 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 154 transitions. [2020-07-21 01:05:40,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:40,920 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 154 transitions. [2020-07-21 01:05:40,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 01:05:40,926 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:40,928 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:05:41,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:41,143 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:41,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:41,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1466599343, now seen corresponding path program 1 times [2020-07-21 01:05:41,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:41,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414021926] [2020-07-21 01:05:41,146 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:41,190 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:05:41,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:41,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:05:41,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:05:41,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:41,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414021926] [2020-07-21 01:05:41,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:41,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:41,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408971685] [2020-07-21 01:05:41,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:41,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:41,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:41,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:41,210 INFO L87 Difference]: Start difference. First operand 104 states and 154 transitions. Second operand 3 states. [2020-07-21 01:05:41,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:41,244 INFO L93 Difference]: Finished difference Result 232 states and 344 transitions. [2020-07-21 01:05:41,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:41,245 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-07-21 01:05:41,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:41,247 INFO L225 Difference]: With dead ends: 232 [2020-07-21 01:05:41,248 INFO L226 Difference]: Without dead ends: 138 [2020-07-21 01:05:41,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:41,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-07-21 01:05:41,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-07-21 01:05:41,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-07-21 01:05:41,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 194 transitions. [2020-07-21 01:05:41,268 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 194 transitions. Word has length 17 [2020-07-21 01:05:41,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:41,268 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 194 transitions. [2020-07-21 01:05:41,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:41,269 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 194 transitions. [2020-07-21 01:05:41,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 01:05:41,270 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:41,271 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:05:41,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:41,487 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:41,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:41,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1100217935, now seen corresponding path program 1 times [2020-07-21 01:05:41,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:41,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556339572] [2020-07-21 01:05:41,489 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:41,528 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:05:41,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:41,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:05:41,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:41,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:05:41,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:41,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556339572] [2020-07-21 01:05:41,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:41,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:41,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963956694] [2020-07-21 01:05:41,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:41,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:41,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:41,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:41,557 INFO L87 Difference]: Start difference. First operand 136 states and 194 transitions. Second operand 3 states. [2020-07-21 01:05:41,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:41,601 INFO L93 Difference]: Finished difference Result 204 states and 288 transitions. [2020-07-21 01:05:41,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:41,602 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-21 01:05:41,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:41,604 INFO L225 Difference]: With dead ends: 204 [2020-07-21 01:05:41,605 INFO L226 Difference]: Without dead ends: 142 [2020-07-21 01:05:41,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:41,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-07-21 01:05:41,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2020-07-21 01:05:41,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-07-21 01:05:41,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 194 transitions. [2020-07-21 01:05:41,622 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 194 transitions. Word has length 18 [2020-07-21 01:05:41,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:41,626 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 194 transitions. [2020-07-21 01:05:41,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:41,626 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 194 transitions. [2020-07-21 01:05:41,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 01:05:41,628 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:41,628 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:05:41,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:41,846 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:41,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:41,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1780276305, now seen corresponding path program 1 times [2020-07-21 01:05:41,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:41,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100325118] [2020-07-21 01:05:41,849 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:41,887 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:05:41,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:41,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:05:41,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:41,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:05:41,908 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:41,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100325118] [2020-07-21 01:05:41,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:41,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:41,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696278034] [2020-07-21 01:05:41,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:41,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:41,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:41,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:41,911 INFO L87 Difference]: Start difference. First operand 140 states and 194 transitions. Second operand 3 states. [2020-07-21 01:05:41,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:41,939 INFO L93 Difference]: Finished difference Result 236 states and 328 transitions. [2020-07-21 01:05:41,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:41,940 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-21 01:05:41,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:41,942 INFO L225 Difference]: With dead ends: 236 [2020-07-21 01:05:41,943 INFO L226 Difference]: Without dead ends: 234 [2020-07-21 01:05:41,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:41,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-07-21 01:05:41,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 200. [2020-07-21 01:05:41,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-07-21 01:05:41,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 270 transitions. [2020-07-21 01:05:41,963 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 270 transitions. Word has length 18 [2020-07-21 01:05:41,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:41,964 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 270 transitions. [2020-07-21 01:05:41,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:41,964 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 270 transitions. [2020-07-21 01:05:41,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 01:05:41,967 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:41,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:05:42,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:42,182 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:42,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:42,185 INFO L82 PathProgramCache]: Analyzing trace with hash 970929679, now seen corresponding path program 1 times [2020-07-21 01:05:42,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:42,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1843266397] [2020-07-21 01:05:42,186 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:42,239 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:05:42,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:42,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:05:42,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:42,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:05:42,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:42,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1843266397] [2020-07-21 01:05:42,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:42,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:42,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644361974] [2020-07-21 01:05:42,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:42,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:42,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:42,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:42,265 INFO L87 Difference]: Start difference. First operand 200 states and 270 transitions. Second operand 3 states. [2020-07-21 01:05:42,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:42,295 INFO L93 Difference]: Finished difference Result 444 states and 592 transitions. [2020-07-21 01:05:42,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:42,296 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-21 01:05:42,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:42,299 INFO L225 Difference]: With dead ends: 444 [2020-07-21 01:05:42,300 INFO L226 Difference]: Without dead ends: 258 [2020-07-21 01:05:42,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:42,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-07-21 01:05:42,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-07-21 01:05:42,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-07-21 01:05:42,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 326 transitions. [2020-07-21 01:05:42,323 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 326 transitions. Word has length 18 [2020-07-21 01:05:42,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:42,324 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 326 transitions. [2020-07-21 01:05:42,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:42,324 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 326 transitions. [2020-07-21 01:05:42,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 01:05:42,327 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:42,327 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:05:42,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:42,541 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:42,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:42,542 INFO L82 PathProgramCache]: Analyzing trace with hash -645793370, now seen corresponding path program 1 times [2020-07-21 01:05:42,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:42,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [560330622] [2020-07-21 01:05:42,544 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:42,583 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:05:42,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:42,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:05:42,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:42,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:05:42,596 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:42,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [560330622] [2020-07-21 01:05:42,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:42,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:42,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512102826] [2020-07-21 01:05:42,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:42,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:42,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:42,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:42,599 INFO L87 Difference]: Start difference. First operand 256 states and 326 transitions. Second operand 3 states. [2020-07-21 01:05:42,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:42,627 INFO L93 Difference]: Finished difference Result 384 states and 484 transitions. [2020-07-21 01:05:42,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:42,628 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-21 01:05:42,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:42,630 INFO L225 Difference]: With dead ends: 384 [2020-07-21 01:05:42,630 INFO L226 Difference]: Without dead ends: 266 [2020-07-21 01:05:42,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:42,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-07-21 01:05:42,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 264. [2020-07-21 01:05:42,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-07-21 01:05:42,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 326 transitions. [2020-07-21 01:05:42,651 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 326 transitions. Word has length 19 [2020-07-21 01:05:42,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:42,651 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 326 transitions. [2020-07-21 01:05:42,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:42,652 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 326 transitions. [2020-07-21 01:05:42,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 01:05:42,656 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:42,656 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:05:42,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:42,874 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:42,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:42,875 INFO L82 PathProgramCache]: Analyzing trace with hash 34265000, now seen corresponding path program 1 times [2020-07-21 01:05:42,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:42,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309668106] [2020-07-21 01:05:42,876 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:42,914 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:05:42,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:42,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:05:42,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:42,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:05:42,940 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:42,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309668106] [2020-07-21 01:05:42,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:42,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:42,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873429351] [2020-07-21 01:05:42,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:42,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:42,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:42,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:42,944 INFO L87 Difference]: Start difference. First operand 264 states and 326 transitions. Second operand 3 states. [2020-07-21 01:05:42,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:42,984 INFO L93 Difference]: Finished difference Result 426 states and 519 transitions. [2020-07-21 01:05:42,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:42,985 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-21 01:05:42,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:42,989 INFO L225 Difference]: With dead ends: 426 [2020-07-21 01:05:42,989 INFO L226 Difference]: Without dead ends: 424 [2020-07-21 01:05:42,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:42,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2020-07-21 01:05:43,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 392. [2020-07-21 01:05:43,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-07-21 01:05:43,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 470 transitions. [2020-07-21 01:05:43,017 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 470 transitions. Word has length 19 [2020-07-21 01:05:43,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:43,017 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 470 transitions. [2020-07-21 01:05:43,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:43,018 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 470 transitions. [2020-07-21 01:05:43,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 01:05:43,020 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:43,020 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:05:43,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:43,236 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:43,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:43,237 INFO L82 PathProgramCache]: Analyzing trace with hash -775081626, now seen corresponding path program 1 times [2020-07-21 01:05:43,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:43,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868816462] [2020-07-21 01:05:43,239 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:43,306 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:05:43,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:43,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:05:43,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:43,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:05:43,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:43,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1868816462] [2020-07-21 01:05:43,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:43,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:43,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434078224] [2020-07-21 01:05:43,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:43,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:43,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:43,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:43,345 INFO L87 Difference]: Start difference. First operand 392 states and 470 transitions. Second operand 3 states. [2020-07-21 01:05:43,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:43,459 INFO L93 Difference]: Finished difference Result 856 states and 998 transitions. [2020-07-21 01:05:43,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:43,460 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-21 01:05:43,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:43,460 INFO L225 Difference]: With dead ends: 856 [2020-07-21 01:05:43,461 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 01:05:43,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:43,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 01:05:43,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 01:05:43,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 01:05:43,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 01:05:43,466 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-07-21 01:05:43,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:43,467 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 01:05:43,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:43,467 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 01:05:43,467 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 01:05:43,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:43,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 01:05:43,775 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 01:05:43,776 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 01:05:43,776 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 01:05:43,776 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 01:05:43,777 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 01:05:43,777 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 01:05:43,777 INFO L268 CegarLoopResult]: For program point L64(line 64) no Hoare annotation was computed. [2020-07-21 01:05:43,777 INFO L271 CegarLoopResult]: At program point L89(lines 5 93) the Hoare annotation is: true [2020-07-21 01:05:43,777 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 93) no Hoare annotation was computed. [2020-07-21 01:05:43,779 INFO L268 CegarLoopResult]: For program point L73-1(lines 24 88) no Hoare annotation was computed. [2020-07-21 01:05:43,779 INFO L268 CegarLoopResult]: For program point L69(line 69) no Hoare annotation was computed. [2020-07-21 01:05:43,779 INFO L268 CegarLoopResult]: For program point L57-1(lines 24 88) no Hoare annotation was computed. [2020-07-21 01:05:43,780 INFO L268 CegarLoopResult]: For program point L53-1(lines 24 88) no Hoare annotation was computed. [2020-07-21 01:05:43,780 INFO L268 CegarLoopResult]: For program point L49-1(lines 24 88) no Hoare annotation was computed. [2020-07-21 01:05:43,780 INFO L268 CegarLoopResult]: For program point L78-1(lines 24 88) no Hoare annotation was computed. [2020-07-21 01:05:43,780 INFO L268 CegarLoopResult]: For program point L45-1(lines 24 88) no Hoare annotation was computed. [2020-07-21 01:05:43,780 INFO L268 CegarLoopResult]: For program point L74(line 74) no Hoare annotation was computed. [2020-07-21 01:05:43,780 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-07-21 01:05:43,781 INFO L268 CegarLoopResult]: For program point L41-2(lines 24 88) no Hoare annotation was computed. [2020-07-21 01:05:43,781 INFO L271 CegarLoopResult]: At program point L83-1(lines 24 88) the Hoare annotation is: true [2020-07-21 01:05:43,781 INFO L268 CegarLoopResult]: For program point L79(line 79) no Hoare annotation was computed. [2020-07-21 01:05:43,781 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 93) no Hoare annotation was computed. [2020-07-21 01:05:43,781 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 91) no Hoare annotation was computed. [2020-07-21 01:05:43,782 INFO L268 CegarLoopResult]: For program point L63-1(lines 24 88) no Hoare annotation was computed. [2020-07-21 01:05:43,782 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 93) the Hoare annotation is: true [2020-07-21 01:05:43,782 INFO L268 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-07-21 01:05:43,782 INFO L268 CegarLoopResult]: For program point L84(line 84) no Hoare annotation was computed. [2020-07-21 01:05:43,782 INFO L264 CegarLoopResult]: At program point L84-1(lines 5 93) the Hoare annotation is: false [2020-07-21 01:05:43,782 INFO L268 CegarLoopResult]: For program point L68-1(lines 24 88) no Hoare annotation was computed. [2020-07-21 01:05:43,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:05:43 BoogieIcfgContainer [2020-07-21 01:05:43,806 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 01:05:43,812 INFO L168 Benchmark]: Toolchain (without parser) took 6980.77 ms. Allocated memory was 139.5 MB in the beginning and 235.4 MB in the end (delta: 95.9 MB). Free memory was 104.2 MB in the beginning and 88.6 MB in the end (delta: 15.5 MB). Peak memory consumption was 111.5 MB. Max. memory is 7.1 GB. [2020-07-21 01:05:43,825 INFO L168 Benchmark]: CDTParser took 1.26 ms. Allocated memory is still 139.5 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 01:05:43,828 INFO L168 Benchmark]: CACSL2BoogieTranslator took 356.06 ms. Allocated memory is still 139.5 MB. Free memory was 104.0 MB in the beginning and 93.9 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-21 01:05:43,833 INFO L168 Benchmark]: Boogie Preprocessor took 182.92 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 93.9 MB in the beginning and 182.1 MB in the end (delta: -88.2 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. [2020-07-21 01:05:43,839 INFO L168 Benchmark]: RCFGBuilder took 554.15 ms. Allocated memory is still 203.4 MB. Free memory was 182.1 MB in the beginning and 167.6 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-07-21 01:05:43,841 INFO L168 Benchmark]: TraceAbstraction took 5874.28 ms. Allocated memory was 203.4 MB in the beginning and 235.4 MB in the end (delta: 32.0 MB). Free memory was 167.0 MB in the beginning and 88.6 MB in the end (delta: 78.4 MB). Peak memory consumption was 110.4 MB. Max. memory is 7.1 GB. [2020-07-21 01:05:43,844 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.26 ms. Allocated memory is still 139.5 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 356.06 ms. Allocated memory is still 139.5 MB. Free memory was 104.0 MB in the beginning and 93.9 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 182.92 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 93.9 MB in the beginning and 182.1 MB in the end (delta: -88.2 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 554.15 ms. Allocated memory is still 203.4 MB. Free memory was 182.1 MB in the beginning and 167.6 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5874.28 ms. Allocated memory was 203.4 MB in the beginning and 235.4 MB in the end (delta: 32.0 MB). Free memory was 167.0 MB in the beginning and 88.6 MB in the end (delta: 78.4 MB). Peak memory consumption was 110.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 91]: 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 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.5s, OverallIterations: 14, TraceHistogramMax: 1, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 654 SDtfs, 285 SDslu, 428 SDs, 0 SdLazy, 75 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 226 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=392occurred in iteration=13, 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, 14 MinimizatonAttempts, 138 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 42 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 240 NumberOfCodeBlocks, 233 NumberOfCodeBlocksAsserted, 53 NumberOfCheckSat, 226 ConstructedInterpolants, 0 QuantifiedInterpolants, 6424 SizeOfPredicates, 0 NumberOfNonLiveVariables, 904 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 0/0 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...