/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 DAGSIZE --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/recursive-simple/id_i5_o5-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 19:44:50,764 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 19:44:50,767 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 19:44:50,787 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 19:44:50,787 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 19:44:50,789 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 19:44:50,791 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 19:44:50,801 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 19:44:50,806 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 19:44:50,809 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 19:44:50,811 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 19:44:50,812 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 19:44:50,813 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 19:44:50,814 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 19:44:50,817 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 19:44:50,818 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 19:44:50,819 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 19:44:50,820 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 19:44:50,821 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 19:44:50,826 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 19:44:50,831 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 19:44:50,835 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 19:44:50,836 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 19:44:50,837 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 19:44:50,839 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 19:44:50,850 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 19:44:50,851 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 19:44:50,852 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 19:44:50,853 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 19:44:50,887 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 19:44:50,887 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 19:44:50,889 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 19:44:50,889 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 19:44:50,893 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 19:44:50,894 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 19:44:50,894 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 19:44:50,894 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 19:44:50,894 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 19:44:50,894 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 19:44:50,894 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 19:44:50,894 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 19:44:50,895 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 19:44:50,895 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 19:44:50,895 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 19:44:50,895 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 19:44:50,895 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 19:44:50,897 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 19:44:50,898 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 19:44:50,898 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 19:44:50,898 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 19:44:50,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 19:44:50,900 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 19:44:50,900 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 19:44:50,900 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 19:44:50,903 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 19:44:50,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:44:50,903 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 19:44:50,903 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 19:44:50,903 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 -> DAGSIZE 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 19:44:51,236 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 19:44:51,250 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 19:44:51,254 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 19:44:51,256 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 19:44:51,256 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 19:44:51,257 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i5_o5-2.c [2020-07-21 19:44:51,342 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05221ce79/17559c89fa8d49e592dee8dba43dc8db/FLAG9012e5dc9 [2020-07-21 19:44:51,805 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 19:44:51,806 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i5_o5-2.c [2020-07-21 19:44:51,813 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05221ce79/17559c89fa8d49e592dee8dba43dc8db/FLAG9012e5dc9 [2020-07-21 19:44:52,232 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05221ce79/17559c89fa8d49e592dee8dba43dc8db [2020-07-21 19:44:52,241 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 19:44:52,244 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 19:44:52,245 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 19:44:52,245 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 19:44:52,251 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 19:44:52,252 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:44:52" (1/1) ... [2020-07-21 19:44:52,255 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@255720ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:44:52, skipping insertion in model container [2020-07-21 19:44:52,256 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:44:52" (1/1) ... [2020-07-21 19:44:52,265 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 19:44:52,283 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 19:44:52,491 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:44:52,498 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 19:44:52,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:44:52,530 INFO L208 MainTranslator]: Completed translation [2020-07-21 19:44:52,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:44:52 WrapperNode [2020-07-21 19:44:52,531 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 19:44:52,532 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 19:44:52,532 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 19:44:52,532 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 19:44:52,547 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:44:52" (1/1) ... [2020-07-21 19:44:52,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:44:52" (1/1) ... [2020-07-21 19:44:52,554 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:44:52" (1/1) ... [2020-07-21 19:44:52,555 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:44:52" (1/1) ... [2020-07-21 19:44:52,560 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:44:52" (1/1) ... [2020-07-21 19:44:52,563 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:44:52" (1/1) ... [2020-07-21 19:44:52,565 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:44:52" (1/1) ... [2020-07-21 19:44:52,567 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 19:44:52,568 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 19:44:52,568 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 19:44:52,568 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 19:44:52,570 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:44:52" (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 19:44:52,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 19:44:52,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 19:44:52,760 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-21 19:44:52,761 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 19:44:52,761 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 19:44:52,761 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 19:44:52,761 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-21 19:44:52,761 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 19:44:52,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 19:44:52,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 19:44:52,970 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 19:44:52,971 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 19:44:52,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:44:52 BoogieIcfgContainer [2020-07-21 19:44:52,976 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 19:44:52,979 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 19:44:52,979 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 19:44:52,984 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 19:44:52,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 07:44:52" (1/3) ... [2020-07-21 19:44:52,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b0e26be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:44:52, skipping insertion in model container [2020-07-21 19:44:52,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:44:52" (2/3) ... [2020-07-21 19:44:52,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b0e26be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:44:52, skipping insertion in model container [2020-07-21 19:44:52,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:44:52" (3/3) ... [2020-07-21 19:44:52,991 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i5_o5-2.c [2020-07-21 19:44:53,004 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 19:44:53,012 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 19:44:53,026 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 19:44:53,047 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 19:44:53,047 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 19:44:53,048 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 19:44:53,048 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 19:44:53,048 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 19:44:53,048 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 19:44:53,048 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 19:44:53,049 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 19:44:53,064 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-21 19:44:53,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 19:44:53,070 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:44:53,071 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:44:53,072 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:44:53,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:44:53,078 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-07-21 19:44:53,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:44:53,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487660188] [2020-07-21 19:44:53,089 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 19:44:53,181 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:44:53,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:44:53,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 19:44:53,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:44:53,347 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 19:44:53,347 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:44:53,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487660188] [2020-07-21 19:44:53,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:44:53,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 19:44:53,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123306625] [2020-07-21 19:44:53,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 19:44:53,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:44:53,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 19:44:53,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 19:44:53,378 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-21 19:44:53,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:44:53,493 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-21 19:44:53,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 19:44:53,503 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 19:44:53,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:44:53,513 INFO L225 Difference]: With dead ends: 30 [2020-07-21 19:44:53,514 INFO L226 Difference]: Without dead ends: 18 [2020-07-21 19:44:53,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 19:44:53,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-21 19:44:53,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-21 19:44:53,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 19:44:53,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-21 19:44:53,561 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-21 19:44:53,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:44:53,562 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-21 19:44:53,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 19:44:53,562 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-21 19:44:53,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 19:44:53,564 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:44:53,564 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:44:53,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:44:53,781 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:44:53,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:44:53,782 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-07-21 19:44:53,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:44:53,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987958790] [2020-07-21 19:44:53,783 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 19:44:53,817 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:44:53,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:44:53,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 19:44:53,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:44:53,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 19:44:53,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:44:54,064 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:54,069 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:54,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 19:44:54,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987958790] [2020-07-21 19:44:54,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:44:54,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 19:44:54,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739747439] [2020-07-21 19:44:54,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 19:44:54,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:44:54,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 19:44:54,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 19:44:54,120 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 9 states. [2020-07-21 19:44:54,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:44:54,197 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-21 19:44:54,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 19:44:54,198 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-07-21 19:44:54,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:44:54,199 INFO L225 Difference]: With dead ends: 25 [2020-07-21 19:44:54,199 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 19:44:54,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-21 19:44:54,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 19:44:54,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-21 19:44:54,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 19:44:54,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-21 19:44:54,209 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-21 19:44:54,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:44:54,210 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-21 19:44:54,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 19:44:54,210 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-21 19:44:54,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 19:44:54,211 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:44:54,212 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:44:54,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:44:54,428 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:44:54,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:44:54,429 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-07-21 19:44:54,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:44:54,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [101780072] [2020-07-21 19:44:54,431 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 19:44:54,466 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:44:54,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:44:54,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 19:44:54,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:44:54,533 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-21 19:44:54,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:44:54,854 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:54,856 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:54,920 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:54,924 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:54,988 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 19:44:54,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [101780072] [2020-07-21 19:44:54,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:44:54,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 19:44:54,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688790091] [2020-07-21 19:44:54,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 19:44:54,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:44:54,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 19:44:54,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 19:44:54,995 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 11 states. [2020-07-21 19:44:55,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:44:55,093 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-21 19:44:55,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 19:44:55,095 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-07-21 19:44:55,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:44:55,096 INFO L225 Difference]: With dead ends: 28 [2020-07-21 19:44:55,097 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 19:44:55,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 19:44:55,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 19:44:55,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-21 19:44:55,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 19:44:55,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-21 19:44:55,117 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-21 19:44:55,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:44:55,118 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-21 19:44:55,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 19:44:55,119 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-21 19:44:55,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 19:44:55,120 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:44:55,121 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:44:55,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:44:55,323 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:44:55,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:44:55,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-07-21 19:44:55,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:44:55,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787285048] [2020-07-21 19:44:55,325 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 19:44:55,367 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:44:55,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:44:55,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 19:44:55,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:44:55,433 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-21 19:44:55,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:44:55,849 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:55,959 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:56,022 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:56,082 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 19:44:56,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787285048] [2020-07-21 19:44:56,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:44:56,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 19:44:56,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825732223] [2020-07-21 19:44:56,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 19:44:56,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:44:56,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 19:44:56,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 19:44:56,085 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 13 states. [2020-07-21 19:44:56,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:44:56,174 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-21 19:44:56,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 19:44:56,175 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-07-21 19:44:56,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:44:56,177 INFO L225 Difference]: With dead ends: 31 [2020-07-21 19:44:56,177 INFO L226 Difference]: Without dead ends: 27 [2020-07-21 19:44:56,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:44:56,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-21 19:44:56,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-21 19:44:56,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 19:44:56,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-21 19:44:56,185 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-07-21 19:44:56,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:44:56,185 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-21 19:44:56,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 19:44:56,186 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-21 19:44:56,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-21 19:44:56,187 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:44:56,187 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:44:56,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:44:56,400 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:44:56,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:44:56,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-07-21 19:44:56,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:44:56,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034012788] [2020-07-21 19:44:56,402 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 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 19:44:56,442 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:44:56,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:44:56,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 19:44:56,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:44:56,511 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-21 19:44:56,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:44:57,089 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:57,091 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:57,248 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:57,249 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:57,337 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:57,338 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:57,390 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:57,391 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:57,432 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-21 19:44:57,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034012788] [2020-07-21 19:44:57,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:44:57,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 14 [2020-07-21 19:44:57,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904349400] [2020-07-21 19:44:57,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 19:44:57,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:44:57,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 19:44:57,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-07-21 19:44:57,435 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 14 states. [2020-07-21 19:44:57,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:44:57,541 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-21 19:44:57,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 19:44:57,542 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-07-21 19:44:57,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:44:57,544 INFO L225 Difference]: With dead ends: 34 [2020-07-21 19:44:57,544 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 19:44:57,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 11 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:44:57,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 19:44:57,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 19:44:57,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 19:44:57,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-21 19:44:57,552 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-07-21 19:44:57,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:44:57,552 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-21 19:44:57,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 19:44:57,552 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-21 19:44:57,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-21 19:44:57,554 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:44:57,554 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:44:57,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:44:57,763 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:44:57,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:44:57,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-07-21 19:44:57,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:44:57,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103832118] [2020-07-21 19:44:57,768 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 19:44:57,823 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:44:57,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:44:57,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-21 19:44:57,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:44:57,962 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-21 19:44:57,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:44:58,327 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-21 19:44:58,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103832118] [2020-07-21 19:44:58,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:44:58,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-07-21 19:44:58,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225308959] [2020-07-21 19:44:58,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 19:44:58,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:44:58,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 19:44:58,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:44:58,330 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 15 states. [2020-07-21 19:44:58,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:44:58,457 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-07-21 19:44:58,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 19:44:58,458 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-07-21 19:44:58,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:44:58,459 INFO L225 Difference]: With dead ends: 37 [2020-07-21 19:44:58,460 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 19:44:58,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:44:58,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 19:44:58,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-21 19:44:58,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 19:44:58,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-21 19:44:58,468 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-07-21 19:44:58,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:44:58,469 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-21 19:44:58,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 19:44:58,469 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-21 19:44:58,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-21 19:44:58,471 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:44:58,471 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:44:58,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:44:58,685 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:44:58,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:44:58,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-07-21 19:44:58,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:44:58,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382067345] [2020-07-21 19:44:58,687 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 19:44:58,742 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:44:58,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:44:58,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 19:44:58,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:44:58,839 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-21 19:44:58,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:44:58,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382067345] [2020-07-21 19:44:58,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:44:58,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-21 19:44:58,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133261815] [2020-07-21 19:44:58,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 19:44:58,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:44:58,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 19:44:58,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-07-21 19:44:58,841 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-07-21 19:44:58,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:44:58,972 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2020-07-21 19:44:58,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:44:58,972 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-07-21 19:44:58,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:44:58,973 INFO L225 Difference]: With dead ends: 33 [2020-07-21 19:44:58,973 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 19:44:58,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-07-21 19:44:58,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 19:44:58,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 19:44:58,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 19:44:58,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 19:44:58,978 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 49 [2020-07-21 19:44:58,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:44:58,978 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 19:44:58,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 19:44:58,979 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 19:44:58,979 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 19:44:59,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:44:59,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 19:44:59,266 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 19:44:59,266 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 19:44:59,266 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 19:44:59,267 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 19:44:59,267 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 19:44:59,267 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 19:44:59,267 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2020-07-21 19:44:59,267 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 9 15) the Hoare annotation is: true [2020-07-21 19:44:59,267 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 15) no Hoare annotation was computed. [2020-07-21 19:44:59,268 INFO L268 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-07-21 19:44:59,268 INFO L268 CegarLoopResult]: For program point L12(lines 12 14) no Hoare annotation was computed. [2020-07-21 19:44:59,268 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= main_~input~0 5) (<= 5 main_~input~0)) [2020-07-21 19:44:59,268 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-07-21 19:44:59,268 INFO L268 CegarLoopResult]: For program point L12-2(lines 9 15) no Hoare annotation was computed. [2020-07-21 19:44:59,271 INFO L268 CegarLoopResult]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2020-07-21 19:44:59,271 INFO L268 CegarLoopResult]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2020-07-21 19:44:59,271 INFO L271 CegarLoopResult]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2020-07-21 19:44:59,271 INFO L264 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: (and (<= |id_#in~x| id_~x) (<= id_~x |id_#in~x|)) [2020-07-21 19:44:59,271 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-21 19:44:59,272 INFO L268 CegarLoopResult]: For program point L6-1(line 6) no Hoare annotation was computed. [2020-07-21 19:44:59,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 07:44:59 BoogieIcfgContainer [2020-07-21 19:44:59,285 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 19:44:59,289 INFO L168 Benchmark]: Toolchain (without parser) took 7044.65 ms. Allocated memory was 136.8 MB in the beginning and 283.6 MB in the end (delta: 146.8 MB). Free memory was 101.4 MB in the beginning and 180.2 MB in the end (delta: -78.8 MB). Peak memory consumption was 68.0 MB. Max. memory is 7.1 GB. [2020-07-21 19:44:59,292 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 19:44:59,292 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.25 ms. Allocated memory is still 136.8 MB. Free memory was 101.0 MB in the beginning and 91.8 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-07-21 19:44:59,298 INFO L168 Benchmark]: Boogie Preprocessor took 35.40 ms. Allocated memory is still 136.8 MB. Free memory was 91.8 MB in the beginning and 90.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-21 19:44:59,301 INFO L168 Benchmark]: RCFGBuilder took 408.61 ms. Allocated memory was 136.8 MB in the beginning and 202.4 MB in the end (delta: 65.5 MB). Free memory was 90.5 MB in the beginning and 170.2 MB in the end (delta: -79.7 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-21 19:44:59,302 INFO L168 Benchmark]: TraceAbstraction took 6305.86 ms. Allocated memory was 202.4 MB in the beginning and 283.6 MB in the end (delta: 81.3 MB). Free memory was 170.2 MB in the beginning and 180.2 MB in the end (delta: -10.0 MB). Peak memory consumption was 71.2 MB. Max. memory is 7.1 GB. [2020-07-21 19:44:59,308 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 286.25 ms. Allocated memory is still 136.8 MB. Free memory was 101.0 MB in the beginning and 91.8 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 35.40 ms. Allocated memory is still 136.8 MB. Free memory was 91.8 MB in the beginning and 90.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 408.61 ms. Allocated memory was 136.8 MB in the beginning and 202.4 MB in the end (delta: 65.5 MB). Free memory was 90.5 MB in the beginning and 170.2 MB in the end (delta: -79.7 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6305.86 ms. Allocated memory was 202.4 MB in the beginning and 283.6 MB in the end (delta: 81.3 MB). Free memory was 170.2 MB in the beginning and 180.2 MB in the end (delta: -10.0 MB). Peak memory consumption was 71.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.1s, OverallIterations: 7, TraceHistogramMax: 7, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 115 SDtfs, 132 SDslu, 603 SDs, 0 SdLazy, 298 SolverSat, 42 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 387 GetRequests, 272 SyntacticMatches, 29 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 19 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 217 NumberOfCodeBlocks, 202 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 360 ConstructedInterpolants, 0 QuantifiedInterpolants, 29280 SizeOfPredicates, 28 NumberOfNonLiveVariables, 486 ConjunctsInSsa, 83 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 264/474 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...