/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 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_2x3-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 13:46:04,049 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 13:46:04,053 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 13:46:04,083 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 13:46:04,084 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 13:46:04,088 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 13:46:04,090 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 13:46:04,108 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 13:46:04,113 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 13:46:04,114 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 13:46:04,115 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 13:46:04,117 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 13:46:04,117 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 13:46:04,119 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 13:46:04,121 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 13:46:04,123 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 13:46:04,125 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 13:46:04,126 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 13:46:04,128 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 13:46:04,132 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 13:46:04,134 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 13:46:04,136 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 13:46:04,138 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 13:46:04,140 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 13:46:04,143 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 13:46:04,144 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 13:46:04,144 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 13:46:04,146 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 13:46:04,147 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 13:46:04,148 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 13:46:04,148 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 13:46:04,150 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 13:46:04,151 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 13:46:04,153 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 13:46:04,154 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 13:46:04,155 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 13:46:04,156 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 13:46:04,156 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 13:46:04,157 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 13:46:04,158 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 13:46:04,159 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 13:46:04,161 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 13:46:04,189 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 13:46:04,189 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 13:46:04,192 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 13:46:04,192 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 13:46:04,192 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 13:46:04,193 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 13:46:04,193 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 13:46:04,193 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 13:46:04,194 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 13:46:04,194 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 13:46:04,194 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 13:46:04,194 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 13:46:04,195 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 13:46:04,195 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 13:46:04,195 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 13:46:04,195 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 13:46:04,195 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 13:46:04,196 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 13:46:04,196 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 13:46:04,196 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 13:46:04,196 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 13:46:04,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:46:04,197 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 13:46:04,197 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 13:46:04,197 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 13:46:04,197 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 13:46:04,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:46:04,198 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 13:46:04,198 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 13:46:04,198 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 -> 4 [2020-07-20 13:46:04,639 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 13:46:04,660 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 13:46:04,666 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 13:46:04,669 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 13:46:04,670 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 13:46:04,672 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_2x3-2.c [2020-07-20 13:46:04,777 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1279d2677/daa9bfb4826b40c992a8f5cb22ee20a7/FLAG219bdf98a [2020-07-20 13:46:05,491 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 13:46:05,492 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_2x3-2.c [2020-07-20 13:46:05,503 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1279d2677/daa9bfb4826b40c992a8f5cb22ee20a7/FLAG219bdf98a [2020-07-20 13:46:05,770 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1279d2677/daa9bfb4826b40c992a8f5cb22ee20a7 [2020-07-20 13:46:05,794 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 13:46:05,800 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 13:46:05,805 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 13:46:05,805 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 13:46:05,812 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 13:46:05,815 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:46:05" (1/1) ... [2020-07-20 13:46:05,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18d37935 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:46:05, skipping insertion in model container [2020-07-20 13:46:05,823 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:46:05" (1/1) ... [2020-07-20 13:46:05,839 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 13:46:05,878 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 13:46:06,244 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:46:06,256 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 13:46:06,278 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:46:06,303 INFO L208 MainTranslator]: Completed translation [2020-07-20 13:46:06,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:46:06 WrapperNode [2020-07-20 13:46:06,304 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 13:46:06,307 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 13:46:06,307 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 13:46:06,307 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 13:46:06,339 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:46:06" (1/1) ... [2020-07-20 13:46:06,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:46:06" (1/1) ... [2020-07-20 13:46:06,350 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:46:06" (1/1) ... [2020-07-20 13:46:06,351 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:46:06" (1/1) ... [2020-07-20 13:46:06,358 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:46:06" (1/1) ... [2020-07-20 13:46:06,361 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:46:06" (1/1) ... [2020-07-20 13:46:06,364 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:46:06" (1/1) ... [2020-07-20 13:46:06,366 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 13:46:06,368 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 13:46:06,368 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 13:46:06,368 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 13:46:06,370 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:46:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:46:06,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 13:46:06,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 13:46:06,654 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-07-20 13:46:06,655 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 13:46:06,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 13:46:06,656 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-07-20 13:46:06,656 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 13:46:06,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 13:46:06,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 13:46:06,924 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 13:46:06,924 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 13:46:06,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:46:06 BoogieIcfgContainer [2020-07-20 13:46:06,932 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 13:46:06,934 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 13:46:06,935 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 13:46:06,941 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 13:46:06,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:46:05" (1/3) ... [2020-07-20 13:46:06,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@507d5987 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:46:06, skipping insertion in model container [2020-07-20 13:46:06,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:46:06" (2/3) ... [2020-07-20 13:46:06,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@507d5987 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:46:06, skipping insertion in model container [2020-07-20 13:46:06,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:46:06" (3/3) ... [2020-07-20 13:46:06,945 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_2x3-2.c [2020-07-20 13:46:06,961 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 13:46:06,976 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 13:46:07,000 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 13:46:07,041 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 13:46:07,042 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 13:46:07,042 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 13:46:07,042 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 13:46:07,043 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 13:46:07,043 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 13:46:07,043 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 13:46:07,043 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 13:46:07,070 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-20 13:46:07,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 13:46:07,082 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:46:07,084 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:46:07,085 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:46:07,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:46:07,097 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-07-20 13:46:07,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:46:07,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534527449] [2020-07-20 13:46:07,112 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:46:07,216 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:46:07,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:46:07,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 13:46:07,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:46:07,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:46:07,534 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:46:07,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534527449] [2020-07-20 13:46:07,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:46:07,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 13:46:07,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372964122] [2020-07-20 13:46:07,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:46:07,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:46:07,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:46:07,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:46:07,580 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-20 13:46:07,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:46:07,724 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-20 13:46:07,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:46:07,727 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 13:46:07,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:46:07,739 INFO L225 Difference]: With dead ends: 30 [2020-07-20 13:46:07,739 INFO L226 Difference]: Without dead ends: 18 [2020-07-20 13:46:07,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 13:46:07,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-20 13:46:07,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-20 13:46:07,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-20 13:46:07,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-20 13:46:07,822 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-20 13:46:07,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:46:07,823 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-20 13:46:07,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:46:07,824 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-20 13:46:07,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 13:46:07,826 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:46:07,827 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:46:08,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:46:08,044 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:46:08,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:46:08,045 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-07-20 13:46:08,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:46:08,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030254274] [2020-07-20 13:46:08,047 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:46:08,092 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:46:08,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:46:08,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 13:46:08,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:46:08,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 13:46:08,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:46:08,469 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:46:08,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 13:46:08,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1030254274] [2020-07-20 13:46:08,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:46:08,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2020-07-20 13:46:08,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697004823] [2020-07-20 13:46:08,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 13:46:08,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:46:08,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 13:46:08,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-20 13:46:08,548 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-07-20 13:46:08,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:46:08,657 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-20 13:46:08,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 13:46:08,658 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-07-20 13:46:08,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:46:08,660 INFO L225 Difference]: With dead ends: 25 [2020-07-20 13:46:08,661 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 13:46:08,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-20 13:46:08,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 13:46:08,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-20 13:46:08,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 13:46:08,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-20 13:46:08,673 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-20 13:46:08,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:46:08,674 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-20 13:46:08,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 13:46:08,675 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-20 13:46:08,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 13:46:08,677 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:46:08,677 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:46:08,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:46:08,892 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:46:08,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:46:08,895 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-07-20 13:46:08,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:46:08,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900560091] [2020-07-20 13:46:08,897 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:46:08,949 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:46:08,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:46:08,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-20 13:46:08,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:46:09,306 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 13:46:09,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:46:09,906 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:46:09,997 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:46:10,054 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:46:10,056 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:46:10,059 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:46:10,062 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:46:10,064 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:46:10,066 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:46:10,068 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:46:10,072 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:46:10,211 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:46:10,215 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:46:10,236 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 13:46:10,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900560091] [2020-07-20 13:46:10,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:46:10,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2020-07-20 13:46:10,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089497824] [2020-07-20 13:46:10,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 13:46:10,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:46:10,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 13:46:10,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2020-07-20 13:46:10,242 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 18 states. [2020-07-20 13:46:10,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:46:10,728 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-20 13:46:10,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 13:46:10,734 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 25 [2020-07-20 13:46:10,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:46:10,735 INFO L225 Difference]: With dead ends: 28 [2020-07-20 13:46:10,736 INFO L226 Difference]: Without dead ends: 24 [2020-07-20 13:46:10,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2020-07-20 13:46:10,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-20 13:46:10,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-20 13:46:10,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-20 13:46:10,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-20 13:46:10,758 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-20 13:46:10,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:46:10,759 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-20 13:46:10,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 13:46:10,760 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-20 13:46:10,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 13:46:10,762 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:46:10,763 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:46:10,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:46:10,977 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:46:10,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:46:10,978 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-07-20 13:46:10,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:46:10,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703823452] [2020-07-20 13:46:10,979 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:46:11,021 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:46:11,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:46:11,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 13:46:11,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:46:11,094 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-20 13:46:11,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:46:11,397 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:46:11,400 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:46:11,465 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:46:11,522 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 13:46:11,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703823452] [2020-07-20 13:46:11,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:46:11,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 10 [2020-07-20 13:46:11,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573215617] [2020-07-20 13:46:11,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 13:46:11,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:46:11,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 13:46:11,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-07-20 13:46:11,526 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2020-07-20 13:46:11,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:46:11,629 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2020-07-20 13:46:11,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 13:46:11,630 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-07-20 13:46:11,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:46:11,630 INFO L225 Difference]: With dead ends: 24 [2020-07-20 13:46:11,631 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 13:46:11,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 49 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-07-20 13:46:11,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 13:46:11,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 13:46:11,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 13:46:11,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 13:46:11,634 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-07-20 13:46:11,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:46:11,635 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 13:46:11,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 13:46:11,635 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 13:46:11,635 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 13:46:11,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:46:11,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 13:46:11,975 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 13:46:11,975 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 13:46:11,975 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 13:46:11,976 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 13:46:11,976 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 13:46:11,976 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 13:46:11,976 INFO L268 CegarLoopResult]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2020-07-20 13:46:11,976 INFO L264 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~m |sum_#in~m|) (<= sum_~n |sum_#in~n|) (< 0 sum_~n) (<= |sum_#in~n| sum_~n)) [2020-07-20 13:46:11,977 INFO L268 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-07-20 13:46:11,977 INFO L268 CegarLoopResult]: For program point L4(lines 4 8) no Hoare annotation was computed. [2020-07-20 13:46:11,977 INFO L268 CegarLoopResult]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2020-07-20 13:46:11,977 INFO L271 CegarLoopResult]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2020-07-20 13:46:11,978 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-07-20 13:46:11,978 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2020-07-20 13:46:11,978 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2020-07-20 13:46:11,978 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-07-20 13:46:11,979 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-07-20 13:46:11,979 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (= 2 main_~a~0) [2020-07-20 13:46:11,979 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-07-20 13:46:11,979 INFO L268 CegarLoopResult]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2020-07-20 13:46:11,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:46:11 BoogieIcfgContainer [2020-07-20 13:46:11,990 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 13:46:11,994 INFO L168 Benchmark]: Toolchain (without parser) took 6196.46 ms. Allocated memory was 144.2 MB in the beginning and 246.9 MB in the end (delta: 102.8 MB). Free memory was 102.7 MB in the beginning and 144.4 MB in the end (delta: -41.7 MB). Peak memory consumption was 61.0 MB. Max. memory is 7.1 GB. [2020-07-20 13:46:11,995 INFO L168 Benchmark]: CDTParser took 0.59 ms. Allocated memory is still 144.2 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 13:46:11,997 INFO L168 Benchmark]: CACSL2BoogieTranslator took 501.13 ms. Allocated memory is still 144.2 MB. Free memory was 102.3 MB in the beginning and 93.0 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-20 13:46:12,000 INFO L168 Benchmark]: Boogie Preprocessor took 60.55 ms. Allocated memory is still 144.2 MB. Free memory was 93.0 MB in the beginning and 91.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-20 13:46:12,002 INFO L168 Benchmark]: RCFGBuilder took 564.09 ms. Allocated memory was 144.2 MB in the beginning and 203.9 MB in the end (delta: 59.8 MB). Free memory was 91.7 MB in the beginning and 171.8 MB in the end (delta: -80.1 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-20 13:46:12,003 INFO L168 Benchmark]: TraceAbstraction took 5055.70 ms. Allocated memory was 203.9 MB in the beginning and 246.9 MB in the end (delta: 43.0 MB). Free memory was 171.8 MB in the beginning and 144.4 MB in the end (delta: 27.4 MB). Peak memory consumption was 70.3 MB. Max. memory is 7.1 GB. [2020-07-20 13:46:12,011 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.59 ms. Allocated memory is still 144.2 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 501.13 ms. Allocated memory is still 144.2 MB. Free memory was 102.3 MB in the beginning and 93.0 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 60.55 ms. Allocated memory is still 144.2 MB. Free memory was 93.0 MB in the beginning and 91.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 564.09 ms. Allocated memory was 144.2 MB in the beginning and 203.9 MB in the end (delta: 59.8 MB). Free memory was 91.7 MB in the beginning and 171.8 MB in the end (delta: -80.1 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5055.70 ms. Allocated memory was 203.9 MB in the beginning and 246.9 MB in the end (delta: 43.0 MB). Free memory was 171.8 MB in the beginning and 144.4 MB in the end (delta: 27.4 MB). Peak memory consumption was 70.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: 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: 4.8s, OverallIterations: 4, TraceHistogramMax: 4, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 54 SDtfs, 51 SDslu, 212 SDs, 0 SdLazy, 226 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 174 GetRequests, 113 SyntacticMatches, 16 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=3, 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, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 21 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 10 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 88 NumberOfCodeBlocks, 67 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 156 ConstructedInterpolants, 0 QuantifiedInterpolants, 14016 SizeOfPredicates, 19 NumberOfNonLiveVariables, 219 ConjunctsInSsa, 51 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 60/96 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...