/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_VARIABLES --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/nla-digbench/fermat2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 17:16:15,149 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 17:16:15,151 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 17:16:15,172 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 17:16:15,173 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 17:16:15,175 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 17:16:15,177 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 17:16:15,188 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 17:16:15,190 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 17:16:15,191 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 17:16:15,193 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 17:16:15,195 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 17:16:15,196 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 17:16:15,199 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 17:16:15,202 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 17:16:15,204 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 17:16:15,206 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 17:16:15,208 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 17:16:15,210 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 17:16:15,216 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 17:16:15,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 17:16:15,225 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 17:16:15,226 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 17:16:15,227 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 17:16:15,230 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 17:16:15,241 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 17:16:15,242 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 17:16:15,243 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 17:16:15,245 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 17:16:15,270 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 17:16:15,270 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 17:16:15,272 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 17:16:15,276 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 17:16:15,276 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 17:16:15,277 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 17:16:15,277 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 17:16:15,277 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 17:16:15,277 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 17:16:15,278 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 17:16:15,278 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 17:16:15,279 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 17:16:15,279 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 17:16:15,279 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 17:16:15,279 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 17:16:15,279 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 17:16:15,280 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 17:16:15,280 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 17:16:15,280 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 17:16:15,280 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 17:16:15,280 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 17:16:15,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 17:16:15,281 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 17:16:15,281 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 17:16:15,281 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 17:16:15,282 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 17:16:15,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:16:15,282 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 17:16:15,282 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 17:16:15,288 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_VARIABLES 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 17:16:15,586 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 17:16:15,601 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 17:16:15,604 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 17:16:15,608 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 17:16:15,611 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 17:16:15,612 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/fermat2.c [2020-07-21 17:16:15,694 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/606bf7f54/4d44f195c9054454948fd48e8ccc511e/FLAG5864d5007 [2020-07-21 17:16:16,201 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 17:16:16,201 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/fermat2.c [2020-07-21 17:16:16,211 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/606bf7f54/4d44f195c9054454948fd48e8ccc511e/FLAG5864d5007 [2020-07-21 17:16:16,561 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/606bf7f54/4d44f195c9054454948fd48e8ccc511e [2020-07-21 17:16:16,570 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 17:16:16,573 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 17:16:16,574 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 17:16:16,574 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 17:16:16,578 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 17:16:16,579 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:16:16" (1/1) ... [2020-07-21 17:16:16,582 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@310fa0ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:16:16, skipping insertion in model container [2020-07-21 17:16:16,583 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:16:16" (1/1) ... [2020-07-21 17:16:16,591 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 17:16:16,609 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 17:16:16,783 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 17:16:16,788 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 17:16:16,810 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 17:16:16,826 INFO L208 MainTranslator]: Completed translation [2020-07-21 17:16:16,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:16:16 WrapperNode [2020-07-21 17:16:16,827 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 17:16:16,827 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 17:16:16,828 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 17:16:16,828 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 17:16:16,843 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:16:16" (1/1) ... [2020-07-21 17:16:16,844 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:16:16" (1/1) ... [2020-07-21 17:16:16,851 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:16:16" (1/1) ... [2020-07-21 17:16:16,851 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:16:16" (1/1) ... [2020-07-21 17:16:16,938 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:16:16" (1/1) ... [2020-07-21 17:16:16,943 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:16:16" (1/1) ... [2020-07-21 17:16:16,944 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:16:16" (1/1) ... [2020-07-21 17:16:16,951 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 17:16:16,951 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 17:16:16,952 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 17:16:16,952 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 17:16:16,953 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:16:16" (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 17:16:17,022 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 17:16:17,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 17:16:17,023 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 17:16:17,024 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 17:16:17,024 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 17:16:17,024 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 17:16:17,025 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2020-07-21 17:16:17,025 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 17:16:17,025 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 17:16:17,025 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 17:16:17,025 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 17:16:17,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 17:16:17,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 17:16:17,289 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 17:16:17,290 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 17:16:17,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:16:17 BoogieIcfgContainer [2020-07-21 17:16:17,300 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 17:16:17,303 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 17:16:17,304 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 17:16:17,308 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 17:16:17,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:16:16" (1/3) ... [2020-07-21 17:16:17,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@725bcb3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:16:17, skipping insertion in model container [2020-07-21 17:16:17,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:16:16" (2/3) ... [2020-07-21 17:16:17,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@725bcb3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:16:17, skipping insertion in model container [2020-07-21 17:16:17,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:16:17" (3/3) ... [2020-07-21 17:16:17,313 INFO L109 eAbstractionObserver]: Analyzing ICFG fermat2.c [2020-07-21 17:16:17,326 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 17:16:17,335 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 17:16:17,368 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 17:16:17,388 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 17:16:17,388 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 17:16:17,388 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 17:16:17,388 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 17:16:17,388 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 17:16:17,389 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 17:16:17,389 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 17:16:17,389 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 17:16:17,405 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-07-21 17:16:17,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 17:16:17,411 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:16:17,412 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:16:17,412 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:16:17,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:16:17,417 INFO L82 PathProgramCache]: Analyzing trace with hash -849943384, now seen corresponding path program 1 times [2020-07-21 17:16:17,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:16:17,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994730049] [2020-07-21 17:16:17,424 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 17:16:18,578 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:16:18,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:16:18,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 17:16:18,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:16:18,614 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 17:16:18,614 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:16:18,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994730049] [2020-07-21 17:16:18,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:16:18,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 17:16:18,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244847764] [2020-07-21 17:16:18,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 17:16:18,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:16:18,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 17:16:18,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 17:16:18,638 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2020-07-21 17:16:18,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:16:18,664 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2020-07-21 17:16:18,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 17:16:18,665 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2020-07-21 17:16:18,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:16:18,674 INFO L225 Difference]: With dead ends: 50 [2020-07-21 17:16:18,674 INFO L226 Difference]: Without dead ends: 23 [2020-07-21 17:16:18,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 17:16:18,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-21 17:16:18,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-21 17:16:18,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-21 17:16:18,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-07-21 17:16:18,720 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 21 [2020-07-21 17:16:18,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:16:18,721 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-07-21 17:16:18,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 17:16:18,722 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-07-21 17:16:18,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 17:16:18,724 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:16:18,724 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:16:18,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:16:18,931 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:16:18,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:16:18,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1193991140, now seen corresponding path program 1 times [2020-07-21 17:16:18,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:16:18,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391811006] [2020-07-21 17:16:18,934 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 17:16:18,983 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:16:18,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:16:18,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 17:16:18,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:16:19,074 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 17:16:33,644 WARN L193 SmtUtils]: Spent 10.41 s on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 17:16:33,647 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 17:16:54,464 WARN L193 SmtUtils]: Spent 12.27 s on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 17:16:56,507 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 17:17:04,760 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~u~0_BEFORE_CALL_1 Int)) (and (not (= (+ (* 2 v_main_~u~0_BEFORE_CALL_1) (* 4 (let ((.cse0 (div (+ (* v_main_~u~0_BEFORE_CALL_1 (- 1)) 1) (- 2)))) (* .cse0 .cse0)))) (+ (* v_main_~u~0_BEFORE_CALL_1 v_main_~u~0_BEFORE_CALL_1) 1))) (= 0 (mod (+ v_main_~u~0_BEFORE_CALL_1 1) (- 2))))) is different from false [2020-07-21 17:17:06,791 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~u~0_BEFORE_CALL_1 Int)) (and (not (= (+ (* 2 v_main_~u~0_BEFORE_CALL_1) (* 4 (let ((.cse0 (div (+ (* v_main_~u~0_BEFORE_CALL_1 (- 1)) 1) (- 2)))) (* .cse0 .cse0)))) (+ (* v_main_~u~0_BEFORE_CALL_1 v_main_~u~0_BEFORE_CALL_1) 1))) (= 0 (mod (+ v_main_~u~0_BEFORE_CALL_1 1) (- 2))))) is different from true [2020-07-21 17:17:06,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 17:17:06,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:17:06,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391811006] [2020-07-21 17:17:06,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:17:06,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 17:17:06,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20598048] [2020-07-21 17:17:06,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 17:17:06,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:17:06,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 17:17:06,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=12, Unknown=3, NotChecked=6, Total=30 [2020-07-21 17:17:06,800 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 6 states. [2020-07-21 17:17:46,219 WARN L193 SmtUtils]: Spent 34.74 s on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 17:17:56,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:17:56,134 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-07-21 17:17:56,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 17:17:56,143 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-07-21 17:17:56,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:17:56,146 INFO L225 Difference]: With dead ends: 34 [2020-07-21 17:17:56,146 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 17:17:56,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 68.5s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=4, NotChecked=8, Total=42 [2020-07-21 17:17:56,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 17:17:56,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-07-21 17:17:56,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-21 17:17:56,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-07-21 17:17:56,162 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 21 [2020-07-21 17:17:56,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:17:56,165 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-07-21 17:17:56,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 17:17:56,166 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-07-21 17:17:56,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 17:17:56,168 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:17:56,168 INFO L422 BasicCegarLoop]: trace histogram [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 17:17:56,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:17:56,370 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:17:56,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:17:56,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1415100442, now seen corresponding path program 1 times [2020-07-21 17:17:56,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:17:56,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266649355] [2020-07-21 17:17:56,372 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 17:17:56,409 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:17:56,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:17:56,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 17:17:56,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:17:56,613 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 17:17:57,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 17:17:57,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 17:17:58,041 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:18:00,422 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 17:18:00,456 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-21 17:18:00,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:18:00,490 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:18:00,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 17:18:00,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [266649355] [2020-07-21 17:18:00,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 17:18:00,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-07-21 17:18:00,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108629377] [2020-07-21 17:18:00,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 17:18:00,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:18:00,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 17:18:00,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-07-21 17:18:00,607 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 10 states. [2020-07-21 17:18:07,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:18:07,221 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-07-21 17:18:07,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 17:18:07,226 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-21 17:18:07,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:18:07,228 INFO L225 Difference]: With dead ends: 35 [2020-07-21 17:18:07,229 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 17:18:07,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-07-21 17:18:07,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 17:18:07,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-21 17:18:07,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-21 17:18:07,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-07-21 17:18:07,237 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 27 [2020-07-21 17:18:07,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:18:07,237 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-07-21 17:18:07,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 17:18:07,238 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-07-21 17:18:07,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 17:18:07,239 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:18:07,239 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:18:07,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:18:07,449 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:18:07,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:18:07,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1831429119, now seen corresponding path program 1 times [2020-07-21 17:18:07,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:18:07,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474738335] [2020-07-21 17:18:07,454 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 17:18:07,491 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:18:07,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:18:07,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 17:18:07,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:18:08,045 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-21 17:18:08,054 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 17:18:08,443 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 17:18:08,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 17:18:08,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:18:08,941 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-21 17:18:08,942 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:18:09,006 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:18:09,178 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 17:18:09,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474738335] [2020-07-21 17:18:09,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 17:18:09,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 11 [2020-07-21 17:18:09,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264432079] [2020-07-21 17:18:09,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 17:18:09,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:18:09,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 17:18:09,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-07-21 17:18:09,181 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 11 states. [2020-07-21 17:18:24,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:18:24,421 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-07-21 17:18:24,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 17:18:24,422 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-07-21 17:18:24,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:18:24,423 INFO L225 Difference]: With dead ends: 44 [2020-07-21 17:18:24,423 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 17:18:24,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-07-21 17:18:24,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 17:18:24,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 28. [2020-07-21 17:18:24,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-21 17:18:24,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-07-21 17:18:24,432 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 29 [2020-07-21 17:18:24,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:18:24,433 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-07-21 17:18:24,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 17:18:24,433 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-07-21 17:18:24,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 17:18:24,434 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:18:24,435 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:18:24,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:18:24,646 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:18:24,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:18:24,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1774170817, now seen corresponding path program 1 times [2020-07-21 17:18:24,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:18:24,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321441522] [2020-07-21 17:18:24,648 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 17:18:24,686 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:18:24,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:18:24,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 17:18:24,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:18:35,449 WARN L193 SmtUtils]: Spent 8.40 s on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 17:18:50,512 WARN L193 SmtUtils]: Spent 6.56 s on a formula simplification that was a NOOP. DAG size: 33 [2020-07-21 17:18:50,519 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 17:18:50,781 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 2 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 17:18:50,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 17:18:51,639 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:18:58,555 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-21 17:18:58,555 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:18:58,562 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:18:58,757 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 17:18:58,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321441522] [2020-07-21 17:18:58,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 17:18:58,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 11 [2020-07-21 17:18:58,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087928577] [2020-07-21 17:18:58,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 17:18:58,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:18:58,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 17:18:58,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=78, Unknown=6, NotChecked=0, Total=110 [2020-07-21 17:18:58,761 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 11 states. [2020-07-21 17:19:27,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:19:27,430 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2020-07-21 17:19:27,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 17:19:27,431 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-07-21 17:19:27,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:19:27,431 INFO L225 Difference]: With dead ends: 42 [2020-07-21 17:19:27,431 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 17:19:27,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 33.9s TimeCoverageRelationStatistics Valid=39, Invalid=111, Unknown=6, NotChecked=0, Total=156 [2020-07-21 17:19:27,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 17:19:27,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 17:19:27,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 17:19:27,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 17:19:27,434 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-07-21 17:19:27,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:19:27,434 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 17:19:27,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 17:19:27,434 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 17:19:27,434 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 17:19:27,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:19:27,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 17:19:54,222 WARN L193 SmtUtils]: Spent 26.41 s on a formula simplification. DAG size of input: 50 DAG size of output: 31 [2020-07-21 17:19:56,385 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 35 DAG size of output: 1 [2020-07-21 17:20:21,526 WARN L193 SmtUtils]: Spent 25.14 s on a formula simplification. DAG size of input: 50 DAG size of output: 31 [2020-07-21 17:20:21,528 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 17:20:21,528 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 17:20:21,528 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 17:20:21,529 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 17:20:21,529 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 17:20:21,529 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 17:20:21,529 INFO L271 CegarLoopResult]: At program point assume_abort_if_notENTRY(lines 6 8) the Hoare annotation is: true [2020-07-21 17:20:21,529 INFO L268 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-07-21 17:20:21,529 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2020-07-21 17:20:21,529 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2020-07-21 17:20:21,529 INFO L264 CegarLoopResult]: At program point L35-2(lines 31 42) the Hoare annotation is: (or (and (= 1 main_~v~0) (= (let ((.cse0 (div (+ (* main_~u~0 (- 1)) 1) (- 2)))) (* .cse0 .cse0)) (+ main_~A~0 main_~r~0)) (= 0 (mod (+ main_~u~0 1) (- 2)))) (= (+ (* main_~v~0 main_~v~0) (* main_~A~0 4) (* main_~r~0 4) (* main_~u~0 2)) (+ (* main_~v~0 2) (* main_~u~0 main_~u~0)))) [2020-07-21 17:20:21,529 INFO L264 CegarLoopResult]: At program point L31-2(lines 31 42) the Hoare annotation is: (let ((.cse0 (+ (* main_~u~0 main_~u~0) (* 2 main_~v~0))) (.cse1 (* main_~v~0 main_~v~0)) (.cse2 (* 2 main_~u~0)) (.cse3 (* 4 main_~A~0))) (and (= .cse0 (+ .cse1 .cse2 .cse3)) (= .cse0 (+ .cse1 .cse2 (* 4 main_~r~0) .cse3)))) [2020-07-21 17:20:21,529 INFO L268 CegarLoopResult]: For program point L25(line 25) no Hoare annotation was computed. [2020-07-21 17:20:21,530 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 17 47) no Hoare annotation was computed. [2020-07-21 17:20:21,530 INFO L271 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: true [2020-07-21 17:20:21,530 INFO L271 CegarLoopResult]: At program point L23-1(line 23) the Hoare annotation is: true [2020-07-21 17:20:21,530 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 17 47) no Hoare annotation was computed. [2020-07-21 17:20:21,530 INFO L264 CegarLoopResult]: At program point L32(line 32) the Hoare annotation is: (or (and (= 1 main_~v~0) (= (let ((.cse0 (div (+ (* main_~u~0 (- 1)) 1) (- 2)))) (* .cse0 .cse0)) (+ main_~A~0 main_~r~0)) (= 0 (mod (+ main_~u~0 1) (- 2)))) (= (+ (* main_~v~0 main_~v~0) (* main_~A~0 4) (* main_~r~0 4) (* main_~u~0 2)) (+ (* main_~v~0 2) (* main_~u~0 main_~u~0)))) [2020-07-21 17:20:21,530 INFO L268 CegarLoopResult]: For program point L32-1(lines 31 42) no Hoare annotation was computed. [2020-07-21 17:20:21,530 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 17 47) the Hoare annotation is: true [2020-07-21 17:20:21,531 INFO L268 CegarLoopResult]: For program point L45(line 45) no Hoare annotation was computed. [2020-07-21 17:20:21,531 INFO L268 CegarLoopResult]: For program point L35(lines 35 41) no Hoare annotation was computed. [2020-07-21 17:20:21,531 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2020-07-21 17:20:21,531 INFO L268 CegarLoopResult]: For program point L11(lines 11 12) no Hoare annotation was computed. [2020-07-21 17:20:21,531 INFO L268 CegarLoopResult]: For program point L10(lines 10 13) no Hoare annotation was computed. [2020-07-21 17:20:21,531 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2020-07-21 17:20:21,531 INFO L268 CegarLoopResult]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2020-07-21 17:20:21,532 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-07-21 17:20:21,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 05:20:21 BoogieIcfgContainer [2020-07-21 17:20:21,548 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 17:20:21,550 INFO L168 Benchmark]: Toolchain (without parser) took 244978.80 ms. Allocated memory was 138.4 MB in the beginning and 244.8 MB in the end (delta: 106.4 MB). Free memory was 101.6 MB in the beginning and 185.2 MB in the end (delta: -83.6 MB). Peak memory consumption was 22.8 MB. Max. memory is 7.1 GB. [2020-07-21 17:20:21,551 INFO L168 Benchmark]: CDTParser took 0.59 ms. Allocated memory is still 138.4 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 17:20:21,552 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.05 ms. Allocated memory is still 138.4 MB. Free memory was 101.2 MB in the beginning and 91.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-21 17:20:21,553 INFO L168 Benchmark]: Boogie Preprocessor took 123.75 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 91.3 MB in the beginning and 182.0 MB in the end (delta: -90.7 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. [2020-07-21 17:20:21,554 INFO L168 Benchmark]: RCFGBuilder took 349.12 ms. Allocated memory is still 202.9 MB. Free memory was 182.0 MB in the beginning and 168.4 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-07-21 17:20:21,555 INFO L168 Benchmark]: TraceAbstraction took 244244.99 ms. Allocated memory was 202.9 MB in the beginning and 244.8 MB in the end (delta: 41.9 MB). Free memory was 167.7 MB in the beginning and 185.2 MB in the end (delta: -17.5 MB). Peak memory consumption was 24.5 MB. Max. memory is 7.1 GB. [2020-07-21 17:20:21,559 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.59 ms. Allocated memory is still 138.4 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 253.05 ms. Allocated memory is still 138.4 MB. Free memory was 101.2 MB in the beginning and 91.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 123.75 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 91.3 MB in the beginning and 182.0 MB in the end (delta: -90.7 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 349.12 ms. Allocated memory is still 202.9 MB. Free memory was 182.0 MB in the beginning and 168.4 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 244244.99 ms. Allocated memory was 202.9 MB in the beginning and 244.8 MB in the end (delta: 41.9 MB). Free memory was 167.7 MB in the beginning and 185.2 MB in the end (delta: -17.5 MB). Peak memory consumption was 24.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: 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: 31]: Loop Invariant Derived loop invariant: ((1 == v && (u * -1 + 1) / -2 * ((u * -1 + 1) / -2) == A + r) && 0 == (u + 1) % -2) || v * v + A * 4 + r * 4 + u * 2 == v * 2 + u * u - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 190.2s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 99.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 53.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 113 SDtfs, 44 SDslu, 364 SDs, 0 SdLazy, 254 SolverSat, 10 SolverUnsat, 27 SolverUnknown, 0 SolverNotchecked, 57.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 215 GetRequests, 167 SyntacticMatches, 10 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 104.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=2, 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, 17 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 20 PreInvPairs, 32 NumberOfFragments, 152 HoareAnnotationTreeSize, 20 FomulaSimplifications, 434 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 11 FomulaSimplificationsInter, 261 FormulaSimplificationTreeSizeReductionInter, 53.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 87.8s InterpolantComputationTime, 127 NumberOfCodeBlocks, 127 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 204 ConstructedInterpolants, 3 QuantifiedInterpolants, 28290 SizeOfPredicates, 21 NumberOfNonLiveVariables, 268 ConjunctsInSsa, 52 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 42/52 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...