/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 NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -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 13:35:40,062 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 13:35:40,065 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 13:35:40,085 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 13:35:40,085 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 13:35:40,088 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 13:35:40,090 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 13:35:40,100 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 13:35:40,106 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 13:35:40,108 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 13:35:40,110 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 13:35:40,111 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 13:35:40,111 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 13:35:40,113 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 13:35:40,115 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 13:35:40,117 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 13:35:40,118 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 13:35:40,119 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 13:35:40,121 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 13:35:40,126 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 13:35:40,131 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 13:35:40,134 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 13:35:40,135 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 13:35:40,136 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 13:35:40,139 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 13:35:40,149 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 13:35:40,149 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 13:35:40,151 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 13:35:40,152 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 13:35:40,193 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 13:35:40,193 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 13:35:40,195 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 13:35:40,198 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 13:35:40,199 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 13:35:40,199 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 13:35:40,199 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 13:35:40,199 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 13:35:40,199 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 13:35:40,200 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 13:35:40,200 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 13:35:40,200 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 13:35:40,200 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 13:35:40,200 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 13:35:40,201 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 13:35:40,201 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 13:35:40,201 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 13:35:40,202 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 13:35:40,202 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 13:35:40,203 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 13:35:40,203 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 13:35:40,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 13:35:40,203 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 13:35:40,203 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 13:35:40,204 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 13:35:40,204 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 13:35:40,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:35:40,208 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 13:35:40,208 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 13:35:40,209 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 -> NUM_FUNCTIONS 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 -> 2 [2020-07-21 13:35:40,505 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 13:35:40,528 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 13:35:40,532 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 13:35:40,534 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 13:35:40,534 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 13:35:40,536 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_5.c [2020-07-21 13:35:40,621 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2aafe3e24/ae7b09e39f324a42905c8cfa3077010f/FLAGdeb5ac510 [2020-07-21 13:35:41,130 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 13:35:41,131 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_5.c [2020-07-21 13:35:41,144 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2aafe3e24/ae7b09e39f324a42905c8cfa3077010f/FLAGdeb5ac510 [2020-07-21 13:35:41,497 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2aafe3e24/ae7b09e39f324a42905c8cfa3077010f [2020-07-21 13:35:41,507 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 13:35:41,510 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 13:35:41,511 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 13:35:41,511 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 13:35:41,515 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 13:35:41,516 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:35:41" (1/1) ... [2020-07-21 13:35:41,519 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@461a50ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:35:41, skipping insertion in model container [2020-07-21 13:35:41,519 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:35:41" (1/1) ... [2020-07-21 13:35:41,528 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 13:35:41,549 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 13:35:41,749 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:35:41,754 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 13:35:41,774 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:35:41,786 INFO L208 MainTranslator]: Completed translation [2020-07-21 13:35:41,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:35:41 WrapperNode [2020-07-21 13:35:41,787 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 13:35:41,788 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 13:35:41,788 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 13:35:41,788 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 13:35:41,799 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:35:41" (1/1) ... [2020-07-21 13:35:41,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:35:41" (1/1) ... [2020-07-21 13:35:41,806 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:35:41" (1/1) ... [2020-07-21 13:35:41,806 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:35:41" (1/1) ... [2020-07-21 13:35:41,810 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:35:41" (1/1) ... [2020-07-21 13:35:41,919 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:35:41" (1/1) ... [2020-07-21 13:35:41,924 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:35:41" (1/1) ... [2020-07-21 13:35:41,926 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 13:35:41,927 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 13:35:41,927 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 13:35:41,927 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 13:35:41,928 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:35:41" (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 13:35:42,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 13:35:42,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 13:35:42,005 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 13:35:42,006 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 13:35:42,006 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 13:35:42,006 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 13:35:42,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 13:35:42,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 13:35:42,292 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 13:35:42,293 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 13:35:42,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:35:42 BoogieIcfgContainer [2020-07-21 13:35:42,299 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 13:35:42,310 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 13:35:42,311 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 13:35:42,316 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 13:35:42,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:35:41" (1/3) ... [2020-07-21 13:35:42,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26255c56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:35:42, skipping insertion in model container [2020-07-21 13:35:42,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:35:41" (2/3) ... [2020-07-21 13:35:42,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26255c56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:35:42, skipping insertion in model container [2020-07-21 13:35:42,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:35:42" (3/3) ... [2020-07-21 13:35:42,320 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_5.c [2020-07-21 13:35:42,334 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 13:35:42,347 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 13:35:42,362 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 13:35:42,388 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 13:35:42,388 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 13:35:42,388 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 13:35:42,389 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 13:35:42,389 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 13:35:42,389 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 13:35:42,389 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 13:35:42,390 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 13:35:42,411 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-07-21 13:35:42,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 13:35:42,418 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:35:42,419 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:35:42,419 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:35:42,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:35:42,426 INFO L82 PathProgramCache]: Analyzing trace with hash 316328318, now seen corresponding path program 1 times [2020-07-21 13:35:42,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:35:42,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939453905] [2020-07-21 13:35:42,435 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 13:35:42,542 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:35:42,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:35:42,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 13:35:42,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:35:42,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:35:42,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:35:42,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939453905] [2020-07-21 13:35:42,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:35:42,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 13:35:42,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639632343] [2020-07-21 13:35:42,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 13:35:42,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:35:42,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 13:35:42,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:35:42,644 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-07-21 13:35:42,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:35:42,728 INFO L93 Difference]: Finished difference Result 57 states and 90 transitions. [2020-07-21 13:35:42,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 13:35:42,731 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-07-21 13:35:42,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:35:42,752 INFO L225 Difference]: With dead ends: 57 [2020-07-21 13:35:42,753 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 13:35:42,759 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 13:35:42,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 13:35:42,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2020-07-21 13:35:42,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 13:35:42,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 49 transitions. [2020-07-21 13:35:42,804 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 49 transitions. Word has length 15 [2020-07-21 13:35:42,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:35:42,805 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 49 transitions. [2020-07-21 13:35:42,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 13:35:42,805 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 49 transitions. [2020-07-21 13:35:42,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 13:35:42,806 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:35:42,807 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:35:43,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:35:43,023 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:35:43,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:35:43,025 INFO L82 PathProgramCache]: Analyzing trace with hash -493018308, now seen corresponding path program 1 times [2020-07-21 13:35:43,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:35:43,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686411230] [2020-07-21 13:35:43,026 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 13:35:43,092 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:35:43,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:35:43,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 13:35:43,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:35:43,115 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 13:35:43,117 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:35:43,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686411230] [2020-07-21 13:35:43,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:35:43,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 13:35:43,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314491127] [2020-07-21 13:35:43,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 13:35:43,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:35:43,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 13:35:43,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:35:43,123 INFO L87 Difference]: Start difference. First operand 30 states and 49 transitions. Second operand 3 states. [2020-07-21 13:35:43,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:35:43,155 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2020-07-21 13:35:43,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 13:35:43,157 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-07-21 13:35:43,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:35:43,159 INFO L225 Difference]: With dead ends: 67 [2020-07-21 13:35:43,159 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 13:35:43,163 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 13:35:43,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 13:35:43,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-07-21 13:35:43,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 13:35:43,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 65 transitions. [2020-07-21 13:35:43,179 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 65 transitions. Word has length 15 [2020-07-21 13:35:43,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:35:43,180 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 65 transitions. [2020-07-21 13:35:43,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 13:35:43,181 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 65 transitions. [2020-07-21 13:35:43,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 13:35:43,183 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:35:43,184 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:35:43,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:35:43,400 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:35:43,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:35:43,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1216458266, now seen corresponding path program 1 times [2020-07-21 13:35:43,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:35:43,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992533095] [2020-07-21 13:35:43,403 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 13:35:43,458 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:35:43,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:35:43,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 13:35:43,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:35:43,480 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 13:35:43,480 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:35:43,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992533095] [2020-07-21 13:35:43,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:35:43,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 13:35:43,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247134422] [2020-07-21 13:35:43,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 13:35:43,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:35:43,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 13:35:43,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:35:43,490 INFO L87 Difference]: Start difference. First operand 40 states and 65 transitions. Second operand 3 states. [2020-07-21 13:35:43,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:35:43,527 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-07-21 13:35:43,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 13:35:43,529 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-07-21 13:35:43,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:35:43,531 INFO L225 Difference]: With dead ends: 63 [2020-07-21 13:35:43,531 INFO L226 Difference]: Without dead ends: 45 [2020-07-21 13:35:43,534 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 13:35:43,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-21 13:35:43,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2020-07-21 13:35:43,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-21 13:35:43,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 67 transitions. [2020-07-21 13:35:43,549 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 67 transitions. Word has length 16 [2020-07-21 13:35:43,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:35:43,550 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 67 transitions. [2020-07-21 13:35:43,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 13:35:43,552 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 67 transitions. [2020-07-21 13:35:43,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 13:35:43,553 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:35:43,553 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:35:43,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:35:43,771 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:35:43,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:35:43,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1896516636, now seen corresponding path program 1 times [2020-07-21 13:35:43,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:35:43,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327333155] [2020-07-21 13:35:43,774 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 13:35:43,822 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:35:43,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:35:43,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 13:35:43,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:35:43,832 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 13:35:43,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:35:43,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327333155] [2020-07-21 13:35:43,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:35:43,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 13:35:43,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755951741] [2020-07-21 13:35:43,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 13:35:43,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:35:43,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 13:35:43,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:35:43,836 INFO L87 Difference]: Start difference. First operand 43 states and 67 transitions. Second operand 3 states. [2020-07-21 13:35:43,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:35:43,854 INFO L93 Difference]: Finished difference Result 76 states and 120 transitions. [2020-07-21 13:35:43,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 13:35:43,854 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-07-21 13:35:43,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:35:43,856 INFO L225 Difference]: With dead ends: 76 [2020-07-21 13:35:43,856 INFO L226 Difference]: Without dead ends: 74 [2020-07-21 13:35:43,857 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 13:35:43,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-07-21 13:35:43,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2020-07-21 13:35:43,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 13:35:43,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 88 transitions. [2020-07-21 13:35:43,867 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 88 transitions. Word has length 16 [2020-07-21 13:35:43,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:35:43,868 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 88 transitions. [2020-07-21 13:35:43,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 13:35:43,868 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 88 transitions. [2020-07-21 13:35:43,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 13:35:43,869 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:35:43,869 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:35:44,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:35:44,084 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:35:44,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:35:44,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1087170010, now seen corresponding path program 1 times [2020-07-21 13:35:44,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:35:44,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651007065] [2020-07-21 13:35:44,086 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 13:35:44,120 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:35:44,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:35:44,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 13:35:44,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:35:44,137 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 13:35:44,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:35:44,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651007065] [2020-07-21 13:35:44,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:35:44,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 13:35:44,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917618058] [2020-07-21 13:35:44,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 13:35:44,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:35:44,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 13:35:44,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:35:44,141 INFO L87 Difference]: Start difference. First operand 56 states and 88 transitions. Second operand 3 states. [2020-07-21 13:35:44,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:35:44,167 INFO L93 Difference]: Finished difference Result 124 states and 198 transitions. [2020-07-21 13:35:44,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 13:35:44,168 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-07-21 13:35:44,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:35:44,170 INFO L225 Difference]: With dead ends: 124 [2020-07-21 13:35:44,170 INFO L226 Difference]: Without dead ends: 76 [2020-07-21 13:35:44,171 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 13:35:44,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-21 13:35:44,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-07-21 13:35:44,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-07-21 13:35:44,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 114 transitions. [2020-07-21 13:35:44,181 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 114 transitions. Word has length 16 [2020-07-21 13:35:44,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:35:44,182 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 114 transitions. [2020-07-21 13:35:44,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 13:35:44,182 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 114 transitions. [2020-07-21 13:35:44,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 13:35:44,183 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:35:44,183 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 13:35:44,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:35:44,399 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:35:44,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:35:44,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1337311087, now seen corresponding path program 1 times [2020-07-21 13:35:44,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:35:44,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806922038] [2020-07-21 13:35:44,402 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 13:35:44,433 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 13:35:44,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:35:44,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 13:35:44,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:35:44,461 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 13:35:44,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:35:44,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806922038] [2020-07-21 13:35:44,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:35:44,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 13:35:44,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418474398] [2020-07-21 13:35:44,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 13:35:44,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:35:44,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 13:35:44,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:35:44,464 INFO L87 Difference]: Start difference. First operand 74 states and 114 transitions. Second operand 3 states. [2020-07-21 13:35:44,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:35:44,489 INFO L93 Difference]: Finished difference Result 130 states and 202 transitions. [2020-07-21 13:35:44,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 13:35:44,489 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-07-21 13:35:44,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:35:44,491 INFO L225 Difference]: With dead ends: 130 [2020-07-21 13:35:44,492 INFO L226 Difference]: Without dead ends: 128 [2020-07-21 13:35:44,492 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 13:35:44,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-07-21 13:35:44,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-07-21 13:35:44,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-07-21 13:35:44,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 156 transitions. [2020-07-21 13:35:44,505 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 156 transitions. Word has length 17 [2020-07-21 13:35:44,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:35:44,505 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 156 transitions. [2020-07-21 13:35:44,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 13:35:44,506 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 156 transitions. [2020-07-21 13:35:44,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 13:35:44,507 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:35:44,507 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 13:35:44,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:35:44,722 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:35:44,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:35:44,723 INFO L82 PathProgramCache]: Analyzing trace with hash -2146657713, now seen corresponding path program 1 times [2020-07-21 13:35:44,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:35:44,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742794409] [2020-07-21 13:35:44,724 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 13:35:44,778 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:35:44,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:35:44,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 13:35:44,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:35:44,796 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 13:35:44,797 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:35:44,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742794409] [2020-07-21 13:35:44,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:35:44,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 13:35:44,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321353445] [2020-07-21 13:35:44,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 13:35:44,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:35:44,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 13:35:44,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:35:44,801 INFO L87 Difference]: Start difference. First operand 102 states and 156 transitions. Second operand 3 states. [2020-07-21 13:35:44,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:35:44,824 INFO L93 Difference]: Finished difference Result 152 states and 230 transitions. [2020-07-21 13:35:44,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 13:35:44,825 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-07-21 13:35:44,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:35:44,827 INFO L225 Difference]: With dead ends: 152 [2020-07-21 13:35:44,827 INFO L226 Difference]: Without dead ends: 106 [2020-07-21 13:35:44,829 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 13:35:44,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-07-21 13:35:44,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2020-07-21 13:35:44,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-07-21 13:35:44,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 154 transitions. [2020-07-21 13:35:44,857 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 154 transitions. Word has length 17 [2020-07-21 13:35:44,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:35:44,857 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 154 transitions. [2020-07-21 13:35:44,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 13:35:44,857 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 154 transitions. [2020-07-21 13:35:44,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 13:35:44,864 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:35:44,864 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 13:35:45,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:35:45,066 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:35:45,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:35:45,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1466599343, now seen corresponding path program 1 times [2020-07-21 13:35:45,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:35:45,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146598823] [2020-07-21 13:35:45,068 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 13:35:45,095 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:35:45,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:35:45,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 13:35:45,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:35:45,112 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 13:35:45,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:35:45,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146598823] [2020-07-21 13:35:45,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:35:45,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 13:35:45,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314527652] [2020-07-21 13:35:45,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 13:35:45,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:35:45,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 13:35:45,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:35:45,116 INFO L87 Difference]: Start difference. First operand 104 states and 154 transitions. Second operand 3 states. [2020-07-21 13:35:45,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:35:45,140 INFO L93 Difference]: Finished difference Result 232 states and 344 transitions. [2020-07-21 13:35:45,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 13:35:45,141 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-07-21 13:35:45,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:35:45,142 INFO L225 Difference]: With dead ends: 232 [2020-07-21 13:35:45,143 INFO L226 Difference]: Without dead ends: 138 [2020-07-21 13:35:45,144 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 13:35:45,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-07-21 13:35:45,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-07-21 13:35:45,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-07-21 13:35:45,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 194 transitions. [2020-07-21 13:35:45,176 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 194 transitions. Word has length 17 [2020-07-21 13:35:45,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:35:45,177 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 194 transitions. [2020-07-21 13:35:45,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 13:35:45,177 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 194 transitions. [2020-07-21 13:35:45,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 13:35:45,180 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:35:45,180 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 13:35:45,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:35:45,397 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:35:45,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:35:45,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1100217935, now seen corresponding path program 1 times [2020-07-21 13:35:45,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:35:45,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985527843] [2020-07-21 13:35:45,400 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 13:35:45,432 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 13:35:45,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:35:45,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 13:35:45,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:35:45,444 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 13:35:45,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:35:45,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985527843] [2020-07-21 13:35:45,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:35:45,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 13:35:45,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651806910] [2020-07-21 13:35:45,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 13:35:45,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:35:45,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 13:35:45,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:35:45,447 INFO L87 Difference]: Start difference. First operand 136 states and 194 transitions. Second operand 3 states. [2020-07-21 13:35:45,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:35:45,469 INFO L93 Difference]: Finished difference Result 232 states and 332 transitions. [2020-07-21 13:35:45,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 13:35:45,470 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-21 13:35:45,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:35:45,472 INFO L225 Difference]: With dead ends: 232 [2020-07-21 13:35:45,472 INFO L226 Difference]: Without dead ends: 230 [2020-07-21 13:35:45,473 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 13:35:45,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-07-21 13:35:45,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 196. [2020-07-21 13:35:45,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-07-21 13:35:45,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 274 transitions. [2020-07-21 13:35:45,487 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 274 transitions. Word has length 18 [2020-07-21 13:35:45,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:35:45,487 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 274 transitions. [2020-07-21 13:35:45,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 13:35:45,487 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 274 transitions. [2020-07-21 13:35:45,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 13:35:45,489 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:35:45,489 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 13:35:45,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:35:45,700 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:35:45,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:35:45,701 INFO L82 PathProgramCache]: Analyzing trace with hash 290871309, now seen corresponding path program 1 times [2020-07-21 13:35:45,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:35:45,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498591763] [2020-07-21 13:35:45,703 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 13:35:45,729 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:35:45,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:35:45,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 13:35:45,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:35:45,744 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 13:35:45,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:35:45,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498591763] [2020-07-21 13:35:45,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:35:45,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 13:35:45,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690285175] [2020-07-21 13:35:45,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 13:35:45,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:35:45,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 13:35:45,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:35:45,747 INFO L87 Difference]: Start difference. First operand 196 states and 274 transitions. Second operand 3 states. [2020-07-21 13:35:45,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:35:45,777 INFO L93 Difference]: Finished difference Result 292 states and 404 transitions. [2020-07-21 13:35:45,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 13:35:45,778 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-21 13:35:45,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:35:45,780 INFO L225 Difference]: With dead ends: 292 [2020-07-21 13:35:45,781 INFO L226 Difference]: Without dead ends: 202 [2020-07-21 13:35:45,783 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 13:35:45,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-07-21 13:35:45,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2020-07-21 13:35:45,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-07-21 13:35:45,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 270 transitions. [2020-07-21 13:35:45,809 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 270 transitions. Word has length 18 [2020-07-21 13:35:45,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:35:45,810 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 270 transitions. [2020-07-21 13:35:45,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 13:35:45,810 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 270 transitions. [2020-07-21 13:35:45,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 13:35:45,816 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:35:45,816 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 13:35:46,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:35:46,030 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:35:46,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:35:46,031 INFO L82 PathProgramCache]: Analyzing trace with hash 970929679, now seen corresponding path program 1 times [2020-07-21 13:35:46,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:35:46,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785580506] [2020-07-21 13:35:46,032 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 13:35:46,076 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:35:46,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:35:46,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 13:35:46,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:35:46,088 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 13:35:46,088 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:35:46,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785580506] [2020-07-21 13:35:46,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:35:46,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 13:35:46,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829759891] [2020-07-21 13:35:46,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 13:35:46,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:35:46,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 13:35:46,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:35:46,091 INFO L87 Difference]: Start difference. First operand 200 states and 270 transitions. Second operand 3 states. [2020-07-21 13:35:46,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:35:46,113 INFO L93 Difference]: Finished difference Result 444 states and 592 transitions. [2020-07-21 13:35:46,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 13:35:46,113 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-21 13:35:46,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:35:46,115 INFO L225 Difference]: With dead ends: 444 [2020-07-21 13:35:46,115 INFO L226 Difference]: Without dead ends: 258 [2020-07-21 13:35:46,117 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 13:35:46,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-07-21 13:35:46,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-07-21 13:35:46,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-07-21 13:35:46,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 326 transitions. [2020-07-21 13:35:46,130 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 326 transitions. Word has length 18 [2020-07-21 13:35:46,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:35:46,130 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 326 transitions. [2020-07-21 13:35:46,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 13:35:46,130 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 326 transitions. [2020-07-21 13:35:46,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 13:35:46,132 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:35:46,132 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 13:35:46,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:35:46,347 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:35:46,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:35:46,348 INFO L82 PathProgramCache]: Analyzing trace with hash -645793370, now seen corresponding path program 1 times [2020-07-21 13:35:46,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:35:46,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090392388] [2020-07-21 13:35:46,350 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 13:35:46,372 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 13:35:46,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:35:46,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 13:35:46,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:35:46,382 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 13:35:46,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:35:46,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090392388] [2020-07-21 13:35:46,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:35:46,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 13:35:46,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341567303] [2020-07-21 13:35:46,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 13:35:46,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:35:46,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 13:35:46,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:35:46,384 INFO L87 Difference]: Start difference. First operand 256 states and 326 transitions. Second operand 3 states. [2020-07-21 13:35:46,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:35:46,413 INFO L93 Difference]: Finished difference Result 418 states and 527 transitions. [2020-07-21 13:35:46,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 13:35:46,414 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-21 13:35:46,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:35:46,417 INFO L225 Difference]: With dead ends: 418 [2020-07-21 13:35:46,417 INFO L226 Difference]: Without dead ends: 416 [2020-07-21 13:35:46,417 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 13:35:46,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2020-07-21 13:35:46,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 384. [2020-07-21 13:35:46,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-07-21 13:35:46,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 478 transitions. [2020-07-21 13:35:46,433 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 478 transitions. Word has length 19 [2020-07-21 13:35:46,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:35:46,434 INFO L479 AbstractCegarLoop]: Abstraction has 384 states and 478 transitions. [2020-07-21 13:35:46,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 13:35:46,434 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 478 transitions. [2020-07-21 13:35:46,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 13:35:46,435 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:35:46,436 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 13:35:46,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:35:46,649 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:35:46,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:35:46,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1455139996, now seen corresponding path program 1 times [2020-07-21 13:35:46,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:35:46,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766601067] [2020-07-21 13:35:46,651 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 13:35:46,684 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:35:46,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:35:46,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 13:35:46,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:35:46,699 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 13:35:46,699 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:35:46,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766601067] [2020-07-21 13:35:46,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:35:46,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 13:35:46,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883828224] [2020-07-21 13:35:46,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 13:35:46,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:35:46,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 13:35:46,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:35:46,702 INFO L87 Difference]: Start difference. First operand 384 states and 478 transitions. Second operand 3 states. [2020-07-21 13:35:46,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:35:46,723 INFO L93 Difference]: Finished difference Result 572 states and 704 transitions. [2020-07-21 13:35:46,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 13:35:46,723 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-21 13:35:46,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:35:46,726 INFO L225 Difference]: With dead ends: 572 [2020-07-21 13:35:46,727 INFO L226 Difference]: Without dead ends: 394 [2020-07-21 13:35:46,728 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 13:35:46,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-07-21 13:35:46,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 392. [2020-07-21 13:35:46,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-07-21 13:35:46,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 470 transitions. [2020-07-21 13:35:46,745 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 470 transitions. Word has length 19 [2020-07-21 13:35:46,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:35:46,746 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 470 transitions. [2020-07-21 13:35:46,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 13:35:46,746 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 470 transitions. [2020-07-21 13:35:46,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 13:35:46,747 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:35:46,748 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 13:35:46,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:35:46,962 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:35:46,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:35:46,963 INFO L82 PathProgramCache]: Analyzing trace with hash -775081626, now seen corresponding path program 1 times [2020-07-21 13:35:46,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:35:46,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032791313] [2020-07-21 13:35:46,964 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 13:35:46,990 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:35:46,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:35:46,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 13:35:46,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:35:46,999 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 13:35:47,000 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:35:47,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1032791313] [2020-07-21 13:35:47,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:35:47,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 13:35:47,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596786690] [2020-07-21 13:35:47,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 13:35:47,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:35:47,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 13:35:47,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:35:47,003 INFO L87 Difference]: Start difference. First operand 392 states and 470 transitions. Second operand 3 states. [2020-07-21 13:35:47,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:35:47,047 INFO L93 Difference]: Finished difference Result 856 states and 998 transitions. [2020-07-21 13:35:47,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 13:35:47,048 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-21 13:35:47,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:35:47,048 INFO L225 Difference]: With dead ends: 856 [2020-07-21 13:35:47,048 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 13:35:47,051 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 13:35:47,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 13:35:47,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 13:35:47,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 13:35:47,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 13:35:47,052 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-07-21 13:35:47,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:35:47,052 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 13:35:47,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 13:35:47,053 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 13:35:47,053 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 13:35:47,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:35:47,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 13:35:47,327 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 13:35:47,328 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 13:35:47,328 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 13:35:47,328 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 13:35:47,328 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 13:35:47,328 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 13:35:47,329 INFO L268 CegarLoopResult]: For program point L64(line 64) no Hoare annotation was computed. [2020-07-21 13:35:47,329 INFO L271 CegarLoopResult]: At program point L89(lines 5 93) the Hoare annotation is: true [2020-07-21 13:35:47,329 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 93) no Hoare annotation was computed. [2020-07-21 13:35:47,329 INFO L268 CegarLoopResult]: For program point L73-1(lines 24 88) no Hoare annotation was computed. [2020-07-21 13:35:47,329 INFO L268 CegarLoopResult]: For program point L69(line 69) no Hoare annotation was computed. [2020-07-21 13:35:47,330 INFO L268 CegarLoopResult]: For program point L57-1(lines 24 88) no Hoare annotation was computed. [2020-07-21 13:35:47,330 INFO L268 CegarLoopResult]: For program point L53-1(lines 24 88) no Hoare annotation was computed. [2020-07-21 13:35:47,330 INFO L268 CegarLoopResult]: For program point L49-1(lines 24 88) no Hoare annotation was computed. [2020-07-21 13:35:47,330 INFO L268 CegarLoopResult]: For program point L78-1(lines 24 88) no Hoare annotation was computed. [2020-07-21 13:35:47,330 INFO L268 CegarLoopResult]: For program point L45-1(lines 24 88) no Hoare annotation was computed. [2020-07-21 13:35:47,330 INFO L268 CegarLoopResult]: For program point L74(line 74) no Hoare annotation was computed. [2020-07-21 13:35:47,331 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-07-21 13:35:47,331 INFO L268 CegarLoopResult]: For program point L41-2(lines 24 88) no Hoare annotation was computed. [2020-07-21 13:35:47,331 INFO L271 CegarLoopResult]: At program point L83-1(lines 24 88) the Hoare annotation is: true [2020-07-21 13:35:47,331 INFO L268 CegarLoopResult]: For program point L79(line 79) no Hoare annotation was computed. [2020-07-21 13:35:47,331 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 93) no Hoare annotation was computed. [2020-07-21 13:35:47,332 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 91) no Hoare annotation was computed. [2020-07-21 13:35:47,332 INFO L268 CegarLoopResult]: For program point L63-1(lines 24 88) no Hoare annotation was computed. [2020-07-21 13:35:47,332 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 93) the Hoare annotation is: true [2020-07-21 13:35:47,332 INFO L268 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-07-21 13:35:47,332 INFO L268 CegarLoopResult]: For program point L84(line 84) no Hoare annotation was computed. [2020-07-21 13:35:47,333 INFO L264 CegarLoopResult]: At program point L84-1(lines 5 93) the Hoare annotation is: false [2020-07-21 13:35:47,333 INFO L268 CegarLoopResult]: For program point L68-1(lines 24 88) no Hoare annotation was computed. [2020-07-21 13:35:47,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:35:47 BoogieIcfgContainer [2020-07-21 13:35:47,348 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 13:35:47,351 INFO L168 Benchmark]: Toolchain (without parser) took 5841.03 ms. Allocated memory was 144.2 MB in the beginning and 235.9 MB in the end (delta: 91.8 MB). Free memory was 103.5 MB in the beginning and 88.1 MB in the end (delta: 15.4 MB). Peak memory consumption was 107.1 MB. Max. memory is 7.1 GB. [2020-07-21 13:35:47,352 INFO L168 Benchmark]: CDTParser took 0.57 ms. Allocated memory is still 144.2 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-21 13:35:47,353 INFO L168 Benchmark]: CACSL2BoogieTranslator took 276.25 ms. Allocated memory is still 144.2 MB. Free memory was 103.0 MB in the beginning and 93.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-21 13:35:47,354 INFO L168 Benchmark]: Boogie Preprocessor took 138.75 ms. Allocated memory was 144.2 MB in the beginning and 203.9 MB in the end (delta: 59.8 MB). Free memory was 93.1 MB in the beginning and 182.7 MB in the end (delta: -89.6 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. [2020-07-21 13:35:47,355 INFO L168 Benchmark]: RCFGBuilder took 372.12 ms. Allocated memory is still 203.9 MB. Free memory was 182.7 MB in the beginning and 167.5 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.2 MB. Max. memory is 7.1 GB. [2020-07-21 13:35:47,356 INFO L168 Benchmark]: TraceAbstraction took 5037.63 ms. Allocated memory was 203.9 MB in the beginning and 235.9 MB in the end (delta: 32.0 MB). Free memory was 167.5 MB in the beginning and 88.1 MB in the end (delta: 79.4 MB). Peak memory consumption was 111.4 MB. Max. memory is 7.1 GB. [2020-07-21 13:35:47,359 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.57 ms. Allocated memory is still 144.2 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 276.25 ms. Allocated memory is still 144.2 MB. Free memory was 103.0 MB in the beginning and 93.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 138.75 ms. Allocated memory was 144.2 MB in the beginning and 203.9 MB in the end (delta: 59.8 MB). Free memory was 93.1 MB in the beginning and 182.7 MB in the end (delta: -89.6 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 372.12 ms. Allocated memory is still 203.9 MB. Free memory was 182.7 MB in the beginning and 167.5 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5037.63 ms. Allocated memory was 203.9 MB in the beginning and 235.9 MB in the end (delta: 32.0 MB). Free memory was 167.5 MB in the beginning and 88.1 MB in the end (delta: 79.4 MB). Peak memory consumption was 111.4 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: 4.8s, OverallIterations: 14, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 654 SDtfs, 285 SDslu, 428 SDs, 0 SdLazy, 75 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s 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, 0.2s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 240 NumberOfCodeBlocks, 214 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 226 ConstructedInterpolants, 0 QuantifiedInterpolants, 6424 SizeOfPredicates, 0 NumberOfNonLiveVariables, 862 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...