/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/loops-crafted-1/sumt4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 14:49:40,010 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 14:49:40,012 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 14:49:40,029 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 14:49:40,029 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 14:49:40,031 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 14:49:40,032 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 14:49:40,034 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 14:49:40,036 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 14:49:40,037 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 14:49:40,038 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 14:49:40,040 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 14:49:40,040 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 14:49:40,041 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 14:49:40,042 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 14:49:40,044 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 14:49:40,044 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 14:49:40,045 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 14:49:40,047 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 14:49:40,050 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 14:49:40,051 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 14:49:40,053 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 14:49:40,054 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 14:49:40,055 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 14:49:40,057 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 14:49:40,066 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 14:49:40,067 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 14:49:40,068 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 14:49:40,068 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 14:49:40,084 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 14:49:40,084 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 14:49:40,085 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 14:49:40,086 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 14:49:40,086 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 14:49:40,086 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 14:49:40,086 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 14:49:40,087 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 14:49:40,087 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 14:49:40,087 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 14:49:40,087 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 14:49:40,087 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 14:49:40,088 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 14:49:40,088 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 14:49:40,088 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 14:49:40,088 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 14:49:40,088 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 14:49:40,089 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 14:49:40,089 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 14:49:40,089 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 14:49:40,089 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 14:49:40,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 14:49:40,090 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 14:49:40,090 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 14:49:40,090 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 14:49:40,090 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 14:49:40,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:49:40,091 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 14:49:40,091 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 14:49:40,091 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 14:49:40,390 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 14:49:40,405 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 14:49:40,409 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 14:49:40,411 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 14:49:40,411 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 14:49:40,412 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt4.c [2020-07-20 14:49:40,483 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c231fe3c/631b3e36cbb54f59a397f98068bb6afc/FLAGe6fe9dff5 [2020-07-20 14:49:40,990 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 14:49:40,991 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt4.c [2020-07-20 14:49:40,998 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c231fe3c/631b3e36cbb54f59a397f98068bb6afc/FLAGe6fe9dff5 [2020-07-20 14:49:41,317 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c231fe3c/631b3e36cbb54f59a397f98068bb6afc [2020-07-20 14:49:41,329 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 14:49:41,333 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 14:49:41,334 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 14:49:41,335 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 14:49:41,339 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 14:49:41,340 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:49:41" (1/1) ... [2020-07-20 14:49:41,344 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36e4754b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:49:41, skipping insertion in model container [2020-07-20 14:49:41,344 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:49:41" (1/1) ... [2020-07-20 14:49:41,353 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 14:49:41,373 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 14:49:41,615 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:49:41,625 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 14:49:41,646 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:49:41,662 INFO L208 MainTranslator]: Completed translation [2020-07-20 14:49:41,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:49:41 WrapperNode [2020-07-20 14:49:41,663 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 14:49:41,664 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 14:49:41,664 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 14:49:41,664 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 14:49:41,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:49:41" (1/1) ... [2020-07-20 14:49:41,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:49:41" (1/1) ... [2020-07-20 14:49:41,759 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:49:41" (1/1) ... [2020-07-20 14:49:41,759 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:49:41" (1/1) ... [2020-07-20 14:49:41,769 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:49:41" (1/1) ... [2020-07-20 14:49:41,777 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:49:41" (1/1) ... [2020-07-20 14:49:41,779 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:49:41" (1/1) ... [2020-07-20 14:49:41,789 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 14:49:41,790 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 14:49:41,790 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 14:49:41,790 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 14:49:41,791 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:49:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 14:49:41,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 14:49:41,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 14:49:41,865 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 14:49:41,865 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 14:49:41,865 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 14:49:41,865 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 14:49:41,866 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 14:49:41,866 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 14:49:41,866 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 14:49:41,866 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 14:49:41,866 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 14:49:41,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 14:49:41,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 14:49:42,114 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 14:49:42,114 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 14:49:42,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:49:42 BoogieIcfgContainer [2020-07-20 14:49:42,119 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 14:49:42,120 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 14:49:42,120 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 14:49:42,124 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 14:49:42,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 02:49:41" (1/3) ... [2020-07-20 14:49:42,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75fea9b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:49:42, skipping insertion in model container [2020-07-20 14:49:42,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:49:41" (2/3) ... [2020-07-20 14:49:42,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75fea9b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:49:42, skipping insertion in model container [2020-07-20 14:49:42,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:49:42" (3/3) ... [2020-07-20 14:49:42,128 INFO L109 eAbstractionObserver]: Analyzing ICFG sumt4.c [2020-07-20 14:49:42,140 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 14:49:42,148 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 14:49:42,167 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 14:49:42,195 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 14:49:42,196 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 14:49:42,196 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 14:49:42,196 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 14:49:42,196 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 14:49:42,196 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 14:49:42,196 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 14:49:42,197 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 14:49:42,224 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-20 14:49:42,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 14:49:42,234 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:49:42,235 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:49:42,236 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:49:42,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:49:42,246 INFO L82 PathProgramCache]: Analyzing trace with hash -12471351, now seen corresponding path program 1 times [2020-07-20 14:49:42,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:49:42,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387021473] [2020-07-20 14:49:42,268 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 14:49:42,404 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:49:42,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:49:42,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 14:49:42,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:49:42,508 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 14:49:42,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:49:42,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387021473] [2020-07-20 14:49:42,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:49:42,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 14:49:42,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024893083] [2020-07-20 14:49:42,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 14:49:42,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:49:42,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 14:49:42,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 14:49:42,535 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-20 14:49:42,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:49:42,673 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2020-07-20 14:49:42,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 14:49:42,676 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-07-20 14:49:42,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:49:42,687 INFO L225 Difference]: With dead ends: 51 [2020-07-20 14:49:42,687 INFO L226 Difference]: Without dead ends: 19 [2020-07-20 14:49:42,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 14:49:42,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-20 14:49:42,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-07-20 14:49:42,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-20 14:49:42,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-07-20 14:49:42,737 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 12 [2020-07-20 14:49:42,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:49:42,738 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-07-20 14:49:42,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 14:49:42,738 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-07-20 14:49:42,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 14:49:42,740 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:49:42,740 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:49:42,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:49:42,955 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:49:42,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:49:42,957 INFO L82 PathProgramCache]: Analyzing trace with hash -793409467, now seen corresponding path program 1 times [2020-07-20 14:49:42,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:49:42,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596935027] [2020-07-20 14:49:42,958 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 14:49:42,997 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:49:42,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:49:42,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 14:49:43,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:49:43,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:49:43,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:49:43,297 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:49:46,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:49:46,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596935027] [2020-07-20 14:49:46,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:49:46,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-20 14:49:46,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306825853] [2020-07-20 14:49:46,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 14:49:46,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:49:46,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 14:49:46,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=134, Unknown=1, NotChecked=0, Total=182 [2020-07-20 14:49:46,240 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 14 states. [2020-07-20 14:49:52,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:49:52,981 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2020-07-20 14:49:52,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 14:49:52,982 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 15 [2020-07-20 14:49:52,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:49:52,984 INFO L225 Difference]: With dead ends: 40 [2020-07-20 14:49:52,984 INFO L226 Difference]: Without dead ends: 26 [2020-07-20 14:49:52,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=61, Invalid=178, Unknown=1, NotChecked=0, Total=240 [2020-07-20 14:49:52,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-20 14:49:52,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-07-20 14:49:52,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 14:49:52,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-07-20 14:49:52,993 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 15 [2020-07-20 14:49:52,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:49:52,993 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-07-20 14:49:52,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 14:49:52,994 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-07-20 14:49:52,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 14:49:52,994 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:49:52,995 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:49:53,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:49:53,196 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:49:53,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:49:53,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1087804450, now seen corresponding path program 1 times [2020-07-20 14:49:53,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:49:53,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094738632] [2020-07-20 14:49:53,199 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 14:49:53,247 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 14:49:53,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:49:53,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 14:49:53,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:49:53,268 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:49:53,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:49:53,328 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:49:53,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094738632] [2020-07-20 14:49:53,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:49:53,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-20 14:49:53,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302199168] [2020-07-20 14:49:53,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 14:49:53,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:49:53,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 14:49:53,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-07-20 14:49:53,332 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 8 states. [2020-07-20 14:49:53,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:49:53,638 INFO L93 Difference]: Finished difference Result 60 states and 81 transitions. [2020-07-20 14:49:53,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 14:49:53,640 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-07-20 14:49:53,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:49:53,642 INFO L225 Difference]: With dead ends: 60 [2020-07-20 14:49:53,643 INFO L226 Difference]: Without dead ends: 50 [2020-07-20 14:49:53,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-07-20 14:49:53,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-20 14:49:53,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2020-07-20 14:49:53,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 14:49:53,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2020-07-20 14:49:53,656 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 23 [2020-07-20 14:49:53,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:49:53,656 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2020-07-20 14:49:53,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 14:49:53,656 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2020-07-20 14:49:53,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 14:49:53,657 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:49:53,658 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:49:53,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:49:53,859 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:49:53,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:49:53,860 INFO L82 PathProgramCache]: Analyzing trace with hash -563580765, now seen corresponding path program 1 times [2020-07-20 14:49:53,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:49:53,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103318275] [2020-07-20 14:49:53,862 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 14:49:53,914 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:49:53,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:49:53,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-20 14:49:53,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:49:54,080 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:49:54,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:49:54,118 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:49:54,498 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-07-20 14:49:54,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103318275] [2020-07-20 14:49:54,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 14:49:54,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 13 [2020-07-20 14:49:54,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216864718] [2020-07-20 14:49:54,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 14:49:54,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:49:54,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 14:49:54,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-07-20 14:49:54,501 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand 6 states. [2020-07-20 14:50:02,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:50:02,882 INFO L93 Difference]: Finished difference Result 63 states and 81 transitions. [2020-07-20 14:50:02,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 14:50:02,970 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-07-20 14:50:02,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:50:02,973 INFO L225 Difference]: With dead ends: 63 [2020-07-20 14:50:02,973 INFO L226 Difference]: Without dead ends: 58 [2020-07-20 14:50:02,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-07-20 14:50:02,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-20 14:50:02,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-07-20 14:50:02,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-07-20 14:50:02,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2020-07-20 14:50:02,987 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 25 [2020-07-20 14:50:02,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:50:02,988 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2020-07-20 14:50:02,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 14:50:02,988 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2020-07-20 14:50:02,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 14:50:02,989 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:50:02,990 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:50:03,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:50:03,193 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:50:03,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:50:03,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1723884779, now seen corresponding path program 1 times [2020-07-20 14:50:03,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:50:03,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270400837] [2020-07-20 14:50:03,196 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:50:03,256 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:50:03,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:50:03,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 31 conjunts are in the unsatisfiable core [2020-07-20 14:50:03,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:50:03,589 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:50:03,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:50:03,629 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:50:37,987 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 19 refuted. 7 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:50:37,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270400837] [2020-07-20 14:50:37,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:50:37,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2020-07-20 14:50:37,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398672671] [2020-07-20 14:50:37,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 14:50:37,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:50:37,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 14:50:37,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=516, Unknown=16, NotChecked=0, Total=650 [2020-07-20 14:50:37,991 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand 26 states. [2020-07-20 14:50:48,193 WARN L193 SmtUtils]: Spent 9.49 s on a formula simplification. DAG size of input: 74 DAG size of output: 14 [2020-07-20 14:50:59,669 WARN L193 SmtUtils]: Spent 2.31 s on a formula simplification. DAG size of input: 72 DAG size of output: 13 [2020-07-20 14:51:11,481 WARN L193 SmtUtils]: Spent 6.67 s on a formula simplification. DAG size of input: 69 DAG size of output: 11 [2020-07-20 14:51:27,968 WARN L193 SmtUtils]: Spent 9.59 s on a formula simplification. DAG size of input: 86 DAG size of output: 11 [2020-07-20 14:51:48,516 WARN L193 SmtUtils]: Spent 5.82 s on a formula simplification. DAG size of input: 40 DAG size of output: 14 [2020-07-20 14:52:21,178 WARN L193 SmtUtils]: Spent 5.59 s on a formula simplification. DAG size of input: 64 DAG size of output: 14 [2020-07-20 14:52:33,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:52:33,624 INFO L93 Difference]: Finished difference Result 86 states and 114 transitions. [2020-07-20 14:52:33,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 14:52:33,703 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-07-20 14:52:33,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:52:33,704 INFO L225 Difference]: With dead ends: 86 [2020-07-20 14:52:33,704 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 14:52:33,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 120.1s TimeCoverageRelationStatistics Valid=203, Invalid=824, Unknown=29, NotChecked=0, Total=1056 [2020-07-20 14:52:33,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 14:52:33,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 14:52:33,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 14:52:33,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 14:52:33,707 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-07-20 14:52:33,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:52:33,707 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 14:52:33,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 14:52:33,708 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 14:52:33,708 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 14:52:33,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:52:33,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 14:52:43,614 WARN L193 SmtUtils]: Spent 9.53 s on a formula simplification. DAG size of input: 73 DAG size of output: 13 [2020-07-20 14:52:43,659 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-20 14:52:43,659 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-20 14:52:43,659 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 14:52:43,659 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 14:52:43,660 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 14:52:43,660 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 14:52:43,660 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 14:52:43,660 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-20 14:52:43,660 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-20 14:52:43,660 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-20 14:52:43,660 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-20 14:52:43,660 INFO L268 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-07-20 14:52:43,660 INFO L268 CegarLoopResult]: For program point L25(lines 25 28) no Hoare annotation was computed. [2020-07-20 14:52:43,660 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 14 33) no Hoare annotation was computed. [2020-07-20 14:52:43,661 INFO L268 CegarLoopResult]: For program point L23(lines 23 28) no Hoare annotation was computed. [2020-07-20 14:52:43,661 INFO L268 CegarLoopResult]: For program point L25-2(lines 21 28) no Hoare annotation was computed. [2020-07-20 14:52:43,661 INFO L268 CegarLoopResult]: For program point L21(lines 21 28) no Hoare annotation was computed. [2020-07-20 14:52:43,661 INFO L264 CegarLoopResult]: At program point L19-2(lines 19 30) the Hoare annotation is: (= (mod (+ main_~l~0 2) 4294967296) (mod (+ main_~v4~0 main_~i~0 main_~j~0 main_~k~0 2) 4294967296)) [2020-07-20 14:52:43,661 INFO L264 CegarLoopResult]: At program point L19-3(lines 19 30) the Hoare annotation is: (= (mod main_~l~0 4294967296) (mod (+ main_~v4~0 main_~i~0 main_~j~0 main_~k~0) 4294967296)) [2020-07-20 14:52:43,661 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 14 33) no Hoare annotation was computed. [2020-07-20 14:52:43,661 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 14 33) the Hoare annotation is: true [2020-07-20 14:52:43,661 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-07-20 14:52:43,661 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-20 14:52:43,661 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-20 14:52:43,662 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-20 14:52:43,662 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-20 14:52:43,662 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-20 14:52:43,662 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-20 14:52:43,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 02:52:43 BoogieIcfgContainer [2020-07-20 14:52:43,679 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 14:52:43,681 INFO L168 Benchmark]: Toolchain (without parser) took 182350.03 ms. Allocated memory was 136.8 MB in the beginning and 249.6 MB in the end (delta: 112.7 MB). Free memory was 101.8 MB in the beginning and 122.0 MB in the end (delta: -20.2 MB). Peak memory consumption was 92.5 MB. Max. memory is 7.1 GB. [2020-07-20 14:52:43,682 INFO L168 Benchmark]: CDTParser took 0.28 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: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-20 14:52:43,683 INFO L168 Benchmark]: CACSL2BoogieTranslator took 328.88 ms. Allocated memory is still 136.8 MB. Free memory was 101.4 MB in the beginning and 91.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-20 14:52:43,684 INFO L168 Benchmark]: Boogie Preprocessor took 125.64 ms. Allocated memory was 136.8 MB in the beginning and 200.3 MB in the end (delta: 63.4 MB). Free memory was 91.6 MB in the beginning and 178.4 MB in the end (delta: -86.8 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-07-20 14:52:43,685 INFO L168 Benchmark]: RCFGBuilder took 329.26 ms. Allocated memory is still 200.3 MB. Free memory was 177.7 MB in the beginning and 164.1 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-07-20 14:52:43,686 INFO L168 Benchmark]: TraceAbstraction took 181559.09 ms. Allocated memory was 200.3 MB in the beginning and 249.6 MB in the end (delta: 49.3 MB). Free memory was 163.4 MB in the beginning and 122.0 MB in the end (delta: 41.4 MB). Peak memory consumption was 90.7 MB. Max. memory is 7.1 GB. [2020-07-20 14:52:43,690 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 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: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 328.88 ms. Allocated memory is still 136.8 MB. Free memory was 101.4 MB in the beginning and 91.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 125.64 ms. Allocated memory was 136.8 MB in the beginning and 200.3 MB in the end (delta: 63.4 MB). Free memory was 91.6 MB in the beginning and 178.4 MB in the end (delta: -86.8 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 329.26 ms. Allocated memory is still 200.3 MB. Free memory was 177.7 MB in the beginning and 164.1 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 181559.09 ms. Allocated memory was 200.3 MB in the beginning and 249.6 MB in the end (delta: 49.3 MB). Free memory was 163.4 MB in the beginning and 122.0 MB in the end (delta: 41.4 MB). Peak memory consumption was 90.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: (l + 2) % 4294967296 == (v4 + i + j + k + 2) % 4294967296 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 171.7s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 131.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 9.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 64 SDtfs, 114 SDslu, 313 SDs, 0 SdLazy, 559 SolverSat, 72 SolverUnsat, 21 SolverUnknown, 0 SolverNotchecked, 44.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 208 GetRequests, 124 SyntacticMatches, 13 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 124.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=58occurred in iteration=4, 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, 5 MinimizatonAttempts, 5 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 17 PreInvPairs, 34 NumberOfFragments, 30 HoareAnnotationTreeSize, 17 FomulaSimplifications, 71 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 7 FomulaSimplificationsInter, 284 FormulaSimplificationTreeSizeReductionInter, 9.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 38.7s InterpolantComputationTime, 104 NumberOfCodeBlocks, 99 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 187 ConstructedInterpolants, 17 QuantifiedInterpolants, 46344 SizeOfPredicates, 13 NumberOfNonLiveVariables, 271 ConjunctsInSsa, 95 ConjunctsInUnsatCore, 9 InterpolantComputations, 2 PerfectInterpolantSequences, 24/106 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...