/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/nested6.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 14:14:31,194 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 14:14:31,196 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 14:14:31,208 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 14:14:31,208 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 14:14:31,210 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 14:14:31,211 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 14:14:31,213 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 14:14:31,214 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 14:14:31,215 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 14:14:31,216 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 14:14:31,217 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 14:14:31,217 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 14:14:31,218 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 14:14:31,219 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 14:14:31,221 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 14:14:31,221 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 14:14:31,222 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 14:14:31,224 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 14:14:31,226 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 14:14:31,227 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 14:14:31,228 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 14:14:31,229 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 14:14:31,230 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 14:14:31,232 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 14:14:31,233 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 14:14:31,233 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 14:14:31,234 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 14:14:31,234 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 14:14:31,235 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 14:14:31,235 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 14:14:31,236 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 14:14:31,237 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 14:14:31,238 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 14:14:31,239 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 14:14:31,239 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 14:14:31,239 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 14:14:31,240 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 14:14:31,240 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 14:14:31,241 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 14:14:31,241 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 14:14:31,242 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 14:14:31,257 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 14:14:31,257 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 14:14:31,258 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 14:14:31,258 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 14:14:31,258 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 14:14:31,259 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 14:14:31,259 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 14:14:31,259 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 14:14:31,259 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 14:14:31,259 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 14:14:31,260 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 14:14:31,260 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 14:14:31,260 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 14:14:31,260 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 14:14:31,260 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 14:14:31,261 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 14:14:31,261 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 14:14:31,261 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 14:14:31,261 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 14:14:31,261 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 14:14:31,262 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 14:14:31,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:14:31,262 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 14:14:31,262 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 14:14:31,262 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 14:14:31,263 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 14:14:31,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:14:31,263 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 14:14:31,263 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 14:14:31,263 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 14:14:31,520 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 14:14:31,533 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 14:14:31,536 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 14:14:31,538 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 14:14:31,538 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 14:14:31,539 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested6.i [2020-07-21 14:14:31,598 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/145381b1e/b7c8eaa1b2294386a87fb248e614e7f6/FLAG1493d7b6b [2020-07-21 14:14:32,012 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 14:14:32,013 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested6.i [2020-07-21 14:14:32,019 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/145381b1e/b7c8eaa1b2294386a87fb248e614e7f6/FLAG1493d7b6b [2020-07-21 14:14:32,425 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/145381b1e/b7c8eaa1b2294386a87fb248e614e7f6 [2020-07-21 14:14:32,438 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 14:14:32,441 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 14:14:32,442 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 14:14:32,442 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 14:14:32,446 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 14:14:32,447 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:14:32" (1/1) ... [2020-07-21 14:14:32,449 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59295f4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:14:32, skipping insertion in model container [2020-07-21 14:14:32,450 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:14:32" (1/1) ... [2020-07-21 14:14:32,457 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 14:14:32,478 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 14:14:32,666 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:14:32,672 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 14:14:32,697 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:14:32,712 INFO L208 MainTranslator]: Completed translation [2020-07-21 14:14:32,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:14:32 WrapperNode [2020-07-21 14:14:32,713 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 14:14:32,714 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 14:14:32,714 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 14:14:32,714 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 14:14:32,725 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:14:32" (1/1) ... [2020-07-21 14:14:32,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:14:32" (1/1) ... [2020-07-21 14:14:32,730 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:14:32" (1/1) ... [2020-07-21 14:14:32,731 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:14:32" (1/1) ... [2020-07-21 14:14:32,734 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:14:32" (1/1) ... [2020-07-21 14:14:32,815 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:14:32" (1/1) ... [2020-07-21 14:14:32,817 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:14:32" (1/1) ... [2020-07-21 14:14:32,819 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 14:14:32,820 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 14:14:32,820 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 14:14:32,820 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 14:14:32,827 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:14:32" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:14:32,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 14:14:32,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 14:14:32,886 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 14:14:32,886 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 14:14:32,886 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 14:14:32,887 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 14:14:32,887 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 14:14:32,887 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 14:14:32,887 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 14:14:32,887 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 14:14:32,887 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 14:14:32,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 14:14:32,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 14:14:33,115 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 14:14:33,115 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-21 14:14:33,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:14:33 BoogieIcfgContainer [2020-07-21 14:14:33,120 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 14:14:33,121 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 14:14:33,121 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 14:14:33,124 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 14:14:33,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:14:32" (1/3) ... [2020-07-21 14:14:33,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bbe9f71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:14:33, skipping insertion in model container [2020-07-21 14:14:33,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:14:32" (2/3) ... [2020-07-21 14:14:33,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bbe9f71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:14:33, skipping insertion in model container [2020-07-21 14:14:33,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:14:33" (3/3) ... [2020-07-21 14:14:33,128 INFO L109 eAbstractionObserver]: Analyzing ICFG nested6.i [2020-07-21 14:14:33,140 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 14:14:33,160 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 14:14:33,199 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 14:14:33,247 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 14:14:33,247 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 14:14:33,247 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 14:14:33,247 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 14:14:33,248 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 14:14:33,248 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 14:14:33,248 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 14:14:33,248 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 14:14:33,272 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-07-21 14:14:33,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 14:14:33,278 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:14:33,279 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:14:33,279 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:14:33,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:14:33,284 INFO L82 PathProgramCache]: Analyzing trace with hash 404168940, now seen corresponding path program 1 times [2020-07-21 14:14:33,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:14:33,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238699228] [2020-07-21 14:14:33,294 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:14:33,361 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:14:33,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:14:33,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:14:33,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:14:33,421 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:14:33,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:14:33,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:14:33,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238699228] [2020-07-21 14:14:33,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:14:33,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 14:14:33,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814321810] [2020-07-21 14:14:33,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 14:14:33,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:14:33,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 14:14:33,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:14:33,472 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 5 states. [2020-07-21 14:14:33,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:14:33,595 INFO L93 Difference]: Finished difference Result 57 states and 80 transitions. [2020-07-21 14:14:33,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 14:14:33,597 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-21 14:14:33,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:14:33,605 INFO L225 Difference]: With dead ends: 57 [2020-07-21 14:14:33,605 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 14:14:33,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 14:14:33,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 14:14:33,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-21 14:14:33,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-21 14:14:33,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-07-21 14:14:33,659 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 15 [2020-07-21 14:14:33,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:14:33,660 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-07-21 14:14:33,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 14:14:33,661 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-07-21 14:14:33,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 14:14:33,663 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:14:33,663 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:14:33,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:14:33,879 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:14:33,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:14:33,881 INFO L82 PathProgramCache]: Analyzing trace with hash -849304486, now seen corresponding path program 1 times [2020-07-21 14:14:33,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:14:33,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118453357] [2020-07-21 14:14:33,883 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:14:33,912 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:14:33,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:14:33,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 14:14:33,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:14:33,950 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:14:33,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:14:33,972 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:14:33,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118453357] [2020-07-21 14:14:33,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:14:33,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 14:14:33,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87557064] [2020-07-21 14:14:33,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 14:14:33,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:14:33,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 14:14:33,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 14:14:33,977 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-07-21 14:14:34,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:14:34,129 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2020-07-21 14:14:34,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 14:14:34,130 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-07-21 14:14:34,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:14:34,132 INFO L225 Difference]: With dead ends: 40 [2020-07-21 14:14:34,132 INFO L226 Difference]: Without dead ends: 38 [2020-07-21 14:14:34,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-21 14:14:34,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-21 14:14:34,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2020-07-21 14:14:34,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-21 14:14:34,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-21 14:14:34,143 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 16 [2020-07-21 14:14:34,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:14:34,144 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-21 14:14:34,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 14:14:34,144 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-21 14:14:34,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 14:14:34,145 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:14:34,145 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:14:34,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:14:34,359 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:14:34,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:14:34,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1573212483, now seen corresponding path program 1 times [2020-07-21 14:14:34,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:14:34,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370648604] [2020-07-21 14:14:34,363 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:14:34,404 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:14:34,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:14:34,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:14:34,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:14:34,420 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:14:34,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:14:34,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:14:34,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370648604] [2020-07-21 14:14:34,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:14:34,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 14:14:34,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703181120] [2020-07-21 14:14:34,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 14:14:34,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:14:34,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 14:14:34,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:14:34,439 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 5 states. [2020-07-21 14:14:34,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:14:34,507 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-07-21 14:14:34,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 14:14:34,507 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-07-21 14:14:34,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:14:34,508 INFO L225 Difference]: With dead ends: 45 [2020-07-21 14:14:34,509 INFO L226 Difference]: Without dead ends: 43 [2020-07-21 14:14:34,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 14:14:34,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-21 14:14:34,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-07-21 14:14:34,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-21 14:14:34,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-07-21 14:14:34,520 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 20 [2020-07-21 14:14:34,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:14:34,521 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-07-21 14:14:34,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 14:14:34,521 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-07-21 14:14:34,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 14:14:34,523 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:14:34,523 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:14:34,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:14:34,737 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:14:34,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:14:34,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1604756500, now seen corresponding path program 1 times [2020-07-21 14:14:34,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:14:34,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262614518] [2020-07-21 14:14:34,741 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:14:34,779 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:14:34,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:14:34,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 14:14:34,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:14:34,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 14:14:34,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:14:34,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262614518] [2020-07-21 14:14:34,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:14:34,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:14:34,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690270899] [2020-07-21 14:14:34,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:14:34,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:14:34,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:14:34,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:14:34,808 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 4 states. [2020-07-21 14:14:34,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:14:34,891 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2020-07-21 14:14:34,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:14:34,894 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-07-21 14:14:34,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:14:34,895 INFO L225 Difference]: With dead ends: 68 [2020-07-21 14:14:34,895 INFO L226 Difference]: Without dead ends: 44 [2020-07-21 14:14:34,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:14:34,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-21 14:14:34,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-07-21 14:14:34,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-21 14:14:34,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-07-21 14:14:34,915 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 24 [2020-07-21 14:14:34,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:14:34,915 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-07-21 14:14:34,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:14:34,915 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-07-21 14:14:34,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 14:14:34,920 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:14:34,920 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:14:35,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:14:35,133 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:14:35,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:14:35,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1598241856, now seen corresponding path program 1 times [2020-07-21 14:14:35,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:14:35,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387816387] [2020-07-21 14:14:35,135 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:14:35,159 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:14:35,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:14:35,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 14:14:35,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:14:35,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 14:14:35,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:14:35,241 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 14:14:35,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387816387] [2020-07-21 14:14:35,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:14:35,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-07-21 14:14:35,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806922038] [2020-07-21 14:14:35,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 14:14:35,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:14:35,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 14:14:35,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 14:14:35,244 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 6 states. [2020-07-21 14:14:35,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:14:35,325 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2020-07-21 14:14:35,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 14:14:35,325 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-07-21 14:14:35,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:14:35,327 INFO L225 Difference]: With dead ends: 79 [2020-07-21 14:14:35,327 INFO L226 Difference]: Without dead ends: 54 [2020-07-21 14:14:35,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-21 14:14:35,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-21 14:14:35,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2020-07-21 14:14:35,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-21 14:14:35,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-07-21 14:14:35,338 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 31 [2020-07-21 14:14:35,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:14:35,338 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-07-21 14:14:35,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 14:14:35,339 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-07-21 14:14:35,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-21 14:14:35,340 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:14:35,340 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:14:35,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:14:35,555 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:14:35,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:14:35,556 INFO L82 PathProgramCache]: Analyzing trace with hash 2099424040, now seen corresponding path program 1 times [2020-07-21 14:14:35,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:14:35,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734584370] [2020-07-21 14:14:35,557 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:14:35,590 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:14:35,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:14:35,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 14:14:35,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:14:35,668 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 14:14:35,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:14:44,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734584370] [2020-07-21 14:14:44,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 14:14:44,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-21 14:14:44,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19105950] [2020-07-21 14:14:44,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 14:14:44,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:14:44,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 14:14:44,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=116, Unknown=4, NotChecked=0, Total=156 [2020-07-21 14:14:44,375 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 8 states. [2020-07-21 14:14:44,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:14:44,832 INFO L93 Difference]: Finished difference Result 126 states and 158 transitions. [2020-07-21 14:14:44,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 14:14:44,834 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-07-21 14:14:44,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:14:44,835 INFO L225 Difference]: With dead ends: 126 [2020-07-21 14:14:44,835 INFO L226 Difference]: Without dead ends: 68 [2020-07-21 14:14:44,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=124, Invalid=334, Unknown=4, NotChecked=0, Total=462 [2020-07-21 14:14:44,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-21 14:14:44,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-07-21 14:14:44,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-21 14:14:44,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2020-07-21 14:14:44,848 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 34 [2020-07-21 14:14:44,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:14:44,849 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2020-07-21 14:14:44,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 14:14:44,849 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2020-07-21 14:14:44,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-21 14:14:44,851 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:14:44,851 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:14:45,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:14:45,067 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:14:45,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:14:45,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1702845076, now seen corresponding path program 2 times [2020-07-21 14:14:45,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:14:45,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070249382] [2020-07-21 14:14:45,069 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:14:45,108 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:14:45,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:14:45,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 14:14:45,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:14:45,150 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:14:45,179 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 14:14:45,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:14:45,200 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 14:14:45,267 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 14:14:45,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070249382] [2020-07-21 14:14:45,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:14:45,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-07-21 14:14:45,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234866850] [2020-07-21 14:14:45,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 14:14:45,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:14:45,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 14:14:45,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-21 14:14:45,269 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand 8 states. [2020-07-21 14:14:45,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:14:45,543 INFO L93 Difference]: Finished difference Result 93 states and 119 transitions. [2020-07-21 14:14:45,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 14:14:45,544 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-07-21 14:14:45,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:14:45,546 INFO L225 Difference]: With dead ends: 93 [2020-07-21 14:14:45,546 INFO L226 Difference]: Without dead ends: 91 [2020-07-21 14:14:45,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 65 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-07-21 14:14:45,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-07-21 14:14:45,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 62. [2020-07-21 14:14:45,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-21 14:14:45,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2020-07-21 14:14:45,560 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 38 [2020-07-21 14:14:45,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:14:45,561 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2020-07-21 14:14:45,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 14:14:45,561 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2020-07-21 14:14:45,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 14:14:45,563 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:14:45,563 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:14:45,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:14:45,778 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:14:45,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:14:45,779 INFO L82 PathProgramCache]: Analyzing trace with hash -283813380, now seen corresponding path program 2 times [2020-07-21 14:14:45,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:14:45,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262644262] [2020-07-21 14:14:45,780 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:14:45,803 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:14:45,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:14:45,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 14:14:45,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:14:45,886 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-21 14:14:45,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:14:46,047 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-21 14:14:46,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262644262] [2020-07-21 14:14:46,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:14:46,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-07-21 14:14:46,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681272173] [2020-07-21 14:14:46,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 14:14:46,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:14:46,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 14:14:46,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-07-21 14:14:46,050 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand 11 states. [2020-07-21 14:14:48,346 WARN L838 $PredicateComparison]: unable to prove that (and (< (div (* c_main_~n~0 (- 1)) (- 2)) (+ c_main_~i~0 2)) (forall ((main_~n~0 Int)) (or (< c_main_~j~0 main_~n~0) (< (div (* main_~n~0 (- 1)) (- 2)) (+ c_main_~i~0 2)))) (<= c_main_~n~0 c_main_~j~0)) is different from false [2020-07-21 14:14:50,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:14:50,658 INFO L93 Difference]: Finished difference Result 189 states and 255 transitions. [2020-07-21 14:14:50,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 14:14:50,661 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-21 14:14:50,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:14:50,665 INFO L225 Difference]: With dead ends: 189 [2020-07-21 14:14:50,665 INFO L226 Difference]: Without dead ends: 121 [2020-07-21 14:14:50,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=74, Invalid=139, Unknown=1, NotChecked=26, Total=240 [2020-07-21 14:14:50,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-07-21 14:14:50,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 96. [2020-07-21 14:14:50,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-07-21 14:14:50,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 129 transitions. [2020-07-21 14:14:50,695 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 129 transitions. Word has length 41 [2020-07-21 14:14:50,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:14:50,696 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 129 transitions. [2020-07-21 14:14:50,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 14:14:50,696 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 129 transitions. [2020-07-21 14:14:50,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-21 14:14:50,699 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:14:50,700 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:14:50,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:14:50,914 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:14:50,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:14:50,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1662503488, now seen corresponding path program 3 times [2020-07-21 14:14:50,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:14:50,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642317986] [2020-07-21 14:14:50,915 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:14:50,942 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:14:50,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:14:50,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 14:14:50,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:14:50,972 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:14:50,991 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-07-21 14:14:50,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:14:50,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642317986] [2020-07-21 14:14:50,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:14:50,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 14:14:50,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006066263] [2020-07-21 14:14:50,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 14:14:50,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:14:50,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 14:14:50,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-21 14:14:50,994 INFO L87 Difference]: Start difference. First operand 96 states and 129 transitions. Second operand 6 states. [2020-07-21 14:14:51,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:14:51,093 INFO L93 Difference]: Finished difference Result 96 states and 129 transitions. [2020-07-21 14:14:51,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 14:14:51,094 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-07-21 14:14:51,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:14:51,095 INFO L225 Difference]: With dead ends: 96 [2020-07-21 14:14:51,095 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 14:14:51,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-21 14:14:51,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 14:14:51,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 14:14:51,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 14:14:51,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 14:14:51,097 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 45 [2020-07-21 14:14:51,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:14:51,097 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 14:14:51,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 14:14:51,098 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 14:14:51,098 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 14:14:51,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:14:51,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 14:14:51,972 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 13 [2020-07-21 14:14:56,302 WARN L193 SmtUtils]: Spent 4.33 s on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2020-07-21 14:14:56,306 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 14:14:56,306 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 14:14:56,306 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 14:14:56,306 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 14:14:56,306 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 14:14:56,306 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 14:14:56,306 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-21 14:14:56,306 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-21 14:14:56,306 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-21 14:14:56,307 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-21 14:14:56,307 INFO L268 CegarLoopResult]: For program point L31(lines 23 33) no Hoare annotation was computed. [2020-07-21 14:14:56,307 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 37) no Hoare annotation was computed. [2020-07-21 14:14:56,307 INFO L264 CegarLoopResult]: At program point L23-2(lines 23 33) the Hoare annotation is: (let ((.cse2 (* 2 main_~i~0))) (let ((.cse0 (<= main_~n~0 main_~k~0)) (.cse1 (<= .cse2 main_~j~0))) (or (and (<= main_~k~0 main_~n~0) .cse0 .cse1) (and (<= main_~j~0 .cse2) .cse0 .cse1 (<= main_~n~0 main_~j~0)) (and (<= main_~k~0 (+ .cse2 1)) .cse0 .cse1) (and (forall ((main_~n~0 Int)) (or (< main_~j~0 main_~n~0) (< (div (* main_~n~0 (- 1)) (- 2)) (+ main_~i~0 2)))) (<= main_~k~0 main_~j~0) .cse0 .cse1)))) [2020-07-21 14:14:56,307 INFO L268 CegarLoopResult]: For program point L24(lines 24 32) no Hoare annotation was computed. [2020-07-21 14:14:56,307 INFO L264 CegarLoopResult]: At program point L25-2(lines 25 27) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (< main_~j~0 main_~n~0) (<= .cse0 main_~k~0) (<= main_~k~0 main_~n~0) (<= .cse0 main_~j~0))) [2020-07-21 14:14:56,307 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-07-21 14:14:56,307 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 37) no Hoare annotation was computed. [2020-07-21 14:14:56,307 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (and (< main_~j~0 main_~n~0) (<= main_~k~0 main_~n~0) (<= main_~n~0 main_~k~0) (<= (* 2 main_~i~0) main_~j~0)) [2020-07-21 14:14:56,308 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 37) the Hoare annotation is: true [2020-07-21 14:14:56,308 INFO L264 CegarLoopResult]: At program point L30-1(line 30) the Hoare annotation is: (and (< main_~j~0 main_~n~0) (<= main_~k~0 main_~n~0) (<= main_~n~0 main_~k~0) (<= (* 2 main_~i~0) main_~j~0)) [2020-07-21 14:14:56,308 INFO L264 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (< main_~j~0 main_~n~0) (<= (+ main_~k~0 1) main_~n~0) (<= .cse0 main_~k~0) (<= .cse0 main_~j~0))) [2020-07-21 14:14:56,308 INFO L268 CegarLoopResult]: For program point L26-1(lines 25 27) no Hoare annotation was computed. [2020-07-21 14:14:56,308 INFO L268 CegarLoopResult]: For program point L22-2(lines 22 34) no Hoare annotation was computed. [2020-07-21 14:14:56,308 INFO L264 CegarLoopResult]: At program point L22-3(lines 22 34) the Hoare annotation is: (let ((.cse0 (<= main_~n~0 main_~k~0))) (or (and (<= main_~k~0 main_~n~0) .cse0) (and (< main_~n~0 (+ (* 2 main_~i~0) 1)) .cse0 (<= main_~n~0 main_~j~0)))) [2020-07-21 14:14:56,308 INFO L268 CegarLoopResult]: For program point L18(lines 18 21) no Hoare annotation was computed. [2020-07-21 14:14:56,308 INFO L268 CegarLoopResult]: For program point L18-1(lines 18 21) no Hoare annotation was computed. [2020-07-21 14:14:56,308 INFO L271 CegarLoopResult]: At program point L35(lines 13 37) the Hoare annotation is: true [2020-07-21 14:14:56,308 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-21 14:14:56,309 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-21 14:14:56,309 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-21 14:14:56,309 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-21 14:14:56,309 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-21 14:14:56,309 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-21 14:14:56,324 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2020-07-21 14:14:56,325 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2020-07-21 14:14:56,326 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2020-07-21 14:14:56,326 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2020-07-21 14:14:56,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 02:14:56 BoogieIcfgContainer [2020-07-21 14:14:56,329 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 14:14:56,331 INFO L168 Benchmark]: Toolchain (without parser) took 23891.27 ms. Allocated memory was 137.9 MB in the beginning and 248.5 MB in the end (delta: 110.6 MB). Free memory was 103.2 MB in the beginning and 154.0 MB in the end (delta: -50.7 MB). Peak memory consumption was 118.7 MB. Max. memory is 7.1 GB. [2020-07-21 14:14:56,331 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-21 14:14:56,332 INFO L168 Benchmark]: CACSL2BoogieTranslator took 271.50 ms. Allocated memory is still 137.9 MB. Free memory was 102.8 MB in the beginning and 93.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-21 14:14:56,333 INFO L168 Benchmark]: Boogie Preprocessor took 105.19 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 93.2 MB in the beginning and 181.0 MB in the end (delta: -87.7 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. [2020-07-21 14:14:56,334 INFO L168 Benchmark]: RCFGBuilder took 300.21 ms. Allocated memory is still 201.9 MB. Free memory was 181.0 MB in the beginning and 166.1 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. [2020-07-21 14:14:56,335 INFO L168 Benchmark]: TraceAbstraction took 23207.86 ms. Allocated memory was 201.9 MB in the beginning and 248.5 MB in the end (delta: 46.7 MB). Free memory was 165.4 MB in the beginning and 154.0 MB in the end (delta: 11.5 MB). Peak memory consumption was 117.0 MB. Max. memory is 7.1 GB. [2020-07-21 14:14:56,339 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 271.50 ms. Allocated memory is still 137.9 MB. Free memory was 102.8 MB in the beginning and 93.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 105.19 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 93.2 MB in the beginning and 181.0 MB in the end (delta: -87.7 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 300.21 ms. Allocated memory is still 201.9 MB. Free memory was 181.0 MB in the beginning and 166.1 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 23207.86 ms. Allocated memory was 201.9 MB in the beginning and 248.5 MB in the end (delta: 46.7 MB). Free memory was 165.4 MB in the beginning and 154.0 MB in the end (delta: 11.5 MB). Peak memory consumption was 117.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] * 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: 25]: Loop Invariant Derived loop invariant: ((j < n && 2 * i <= k) && k <= n) && 2 * i <= j - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: (k <= n && n <= k) || ((n < 2 * i + 1 && n <= k) && n <= j) - InvariantResult [Line: 23]: Loop Invariant [2020-07-21 14:14:56,349 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2020-07-21 14:14:56,349 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2020-07-21 14:14:56,350 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2020-07-21 14:14:56,350 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] Derived loop invariant: ((((k <= n && n <= k) && 2 * i <= j) || (((j <= 2 * i && n <= k) && 2 * i <= j) && n <= j)) || ((k <= 2 * i + 1 && n <= k) && 2 * i <= j)) || ((((forall main_~n~0 : int :: j < main_~n~0 || main_~n~0 * -1 / -2 < i + 2) && k <= j) && n <= k) && 2 * i <= j) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 18.0s, OverallIterations: 9, TraceHistogramMax: 5, AutomataDifference: 6.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 5.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 256 SDtfs, 127 SDslu, 693 SDs, 0 SdLazy, 632 SolverSat, 84 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 411 GetRequests, 329 SyntacticMatches, 10 SemanticMatches, 72 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 11.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 76 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 55 PreInvPairs, 118 NumberOfFragments, 166 HoareAnnotationTreeSize, 55 FomulaSimplifications, 6308 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 12 FomulaSimplificationsInter, 946 FormulaSimplificationTreeSizeReductionInter, 4.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 9.5s InterpolantComputationTime, 264 NumberOfCodeBlocks, 200 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 362 ConstructedInterpolants, 1 QuantifiedInterpolants, 26510 SizeOfPredicates, 31 NumberOfNonLiveVariables, 499 ConjunctsInSsa, 47 ConjunctsInUnsatCore, 12 InterpolantComputations, 5 PerfectInterpolantSequences, 172/194 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...