/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/sqrt1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 20:54:53,336 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 20:54:53,338 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 20:54:53,350 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 20:54:53,351 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 20:54:53,352 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 20:54:53,353 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 20:54:53,355 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 20:54:53,357 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 20:54:53,358 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 20:54:53,359 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 20:54:53,360 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 20:54:53,360 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 20:54:53,361 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 20:54:53,362 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 20:54:53,364 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 20:54:53,364 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 20:54:53,365 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 20:54:53,367 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 20:54:53,369 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 20:54:53,374 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 20:54:53,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 20:54:53,376 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 20:54:53,377 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 20:54:53,380 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 20:54:53,388 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 20:54:53,388 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 20:54:53,389 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 20:54:53,390 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 20:54:53,412 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 20:54:53,412 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 20:54:53,414 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 20:54:53,414 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 20:54:53,414 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 20:54:53,415 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 20:54:53,415 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 20:54:53,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 20:54:53,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 20:54:53,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 20:54:53,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 20:54:53,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 20:54:53,416 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 20:54:53,416 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 20:54:53,417 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 20:54:53,418 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 20:54:53,418 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 20:54:53,418 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 20:54:53,418 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 20:54:53,418 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 20:54:53,419 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 20:54:53,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 20:54:53,419 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 20:54:53,419 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 20:54:53,420 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 20:54:53,420 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 20:54:53,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:54:53,420 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 20:54:53,421 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 20:54:53,421 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 20:54:53,702 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 20:54:53,715 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 20:54:53,718 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 20:54:53,720 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 20:54:53,720 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 20:54:53,721 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/sqrt1.c [2020-07-21 20:54:53,789 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f09383a1e/49f60be4cd5441e799d1d4c21e4bbd2e/FLAG74cd08256 [2020-07-21 20:54:54,272 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 20:54:54,274 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/sqrt1.c [2020-07-21 20:54:54,282 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f09383a1e/49f60be4cd5441e799d1d4c21e4bbd2e/FLAG74cd08256 [2020-07-21 20:54:54,665 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f09383a1e/49f60be4cd5441e799d1d4c21e4bbd2e [2020-07-21 20:54:54,673 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 20:54:54,676 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 20:54:54,677 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 20:54:54,677 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 20:54:54,681 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 20:54:54,682 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:54:54" (1/1) ... [2020-07-21 20:54:54,686 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@204f065a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:54:54, skipping insertion in model container [2020-07-21 20:54:54,686 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:54:54" (1/1) ... [2020-07-21 20:54:54,695 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 20:54:54,715 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 20:54:54,888 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:54:54,892 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 20:54:54,908 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:54:54,922 INFO L208 MainTranslator]: Completed translation [2020-07-21 20:54:54,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:54:54 WrapperNode [2020-07-21 20:54:54,923 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 20:54:54,923 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 20:54:54,924 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 20:54:54,924 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 20:54:54,935 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:54:54" (1/1) ... [2020-07-21 20:54:54,935 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:54:54" (1/1) ... [2020-07-21 20:54:55,026 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:54:54" (1/1) ... [2020-07-21 20:54:55,026 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:54:54" (1/1) ... [2020-07-21 20:54:55,030 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:54:54" (1/1) ... [2020-07-21 20:54:55,036 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:54:54" (1/1) ... [2020-07-21 20:54:55,037 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:54:54" (1/1) ... [2020-07-21 20:54:55,040 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 20:54:55,040 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 20:54:55,040 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 20:54:55,040 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 20:54:55,049 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:54:54" (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 20:54:55,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 20:54:55,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 20:54:55,112 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 20:54:55,112 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 20:54:55,112 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 20:54:55,112 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 20:54:55,112 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 20:54:55,112 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 20:54:55,112 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 20:54:55,113 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 20:54:55,113 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 20:54:55,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 20:54:55,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 20:54:55,310 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 20:54:55,311 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 20:54:55,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:54:55 BoogieIcfgContainer [2020-07-21 20:54:55,316 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 20:54:55,317 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 20:54:55,317 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 20:54:55,321 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 20:54:55,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:54:54" (1/3) ... [2020-07-21 20:54:55,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f1b6bd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:54:55, skipping insertion in model container [2020-07-21 20:54:55,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:54:54" (2/3) ... [2020-07-21 20:54:55,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f1b6bd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:54:55, skipping insertion in model container [2020-07-21 20:54:55,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:54:55" (3/3) ... [2020-07-21 20:54:55,325 INFO L109 eAbstractionObserver]: Analyzing ICFG sqrt1.c [2020-07-21 20:54:55,335 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 20:54:55,345 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 20:54:55,364 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 20:54:55,397 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 20:54:55,398 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 20:54:55,398 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 20:54:55,398 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 20:54:55,398 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 20:54:55,398 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 20:54:55,398 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 20:54:55,399 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 20:54:55,422 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-21 20:54:55,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 20:54:55,433 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:54:55,435 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:54:55,435 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:54:55,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:54:55,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1080899301, now seen corresponding path program 1 times [2020-07-21 20:54:55,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:54:55,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020950180] [2020-07-21 20:54:55,453 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 20:54:55,517 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:54:55,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:54:55,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 20:54:55,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:54:55,622 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 20:54:55,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:54:55,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020950180] [2020-07-21 20:54:55,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:54:55,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 20:54:55,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51139120] [2020-07-21 20:54:55,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 20:54:55,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:54:55,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 20:54:55,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 20:54:55,643 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-21 20:54:55,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:54:55,778 INFO L93 Difference]: Finished difference Result 58 states and 95 transitions. [2020-07-21 20:54:55,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 20:54:55,780 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-21 20:54:55,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:54:55,791 INFO L225 Difference]: With dead ends: 58 [2020-07-21 20:54:55,792 INFO L226 Difference]: Without dead ends: 31 [2020-07-21 20:54:55,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 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 20:54:55,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-21 20:54:55,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-07-21 20:54:55,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-21 20:54:55,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2020-07-21 20:54:55,850 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 10 [2020-07-21 20:54:55,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:54:55,850 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2020-07-21 20:54:55,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 20:54:55,851 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2020-07-21 20:54:55,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 20:54:55,853 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:54:55,853 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:54:56,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:54:56,069 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:54:56,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:54:56,070 INFO L82 PathProgramCache]: Analyzing trace with hash 725386554, now seen corresponding path program 1 times [2020-07-21 20:54:56,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:54:56,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014798222] [2020-07-21 20:54:56,071 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 20:54:56,099 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:54:56,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:54:56,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 20:54:56,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:54:56,151 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 20:54:56,151 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:54:56,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014798222] [2020-07-21 20:54:56,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:54:56,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 20:54:56,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761929076] [2020-07-21 20:54:56,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 20:54:56,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:54:56,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 20:54:56,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 20:54:56,156 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand 5 states. [2020-07-21 20:54:56,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:54:56,285 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2020-07-21 20:54:56,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 20:54:56,286 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-21 20:54:56,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:54:56,288 INFO L225 Difference]: With dead ends: 37 [2020-07-21 20:54:56,288 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 20:54:56,289 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 20:54:56,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 20:54:56,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-07-21 20:54:56,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-21 20:54:56,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2020-07-21 20:54:56,302 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 15 [2020-07-21 20:54:56,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:54:56,303 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2020-07-21 20:54:56,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 20:54:56,303 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2020-07-21 20:54:56,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 20:54:56,304 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:54:56,304 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:54:56,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:54:56,518 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:54:56,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:54:56,519 INFO L82 PathProgramCache]: Analyzing trace with hash -436292723, now seen corresponding path program 1 times [2020-07-21 20:54:56,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:54:56,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938774629] [2020-07-21 20:54:56,520 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 20:54:56,549 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:54:56,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:54:56,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 20:54:56,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:54:56,601 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 20:54:56,601 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:54:56,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938774629] [2020-07-21 20:54:56,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:54:56,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 20:54:56,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423151006] [2020-07-21 20:54:56,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 20:54:56,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:54:56,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 20:54:56,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 20:54:56,609 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 5 states. [2020-07-21 20:54:56,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:54:56,702 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2020-07-21 20:54:56,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 20:54:56,703 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-07-21 20:54:56,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:54:56,704 INFO L225 Difference]: With dead ends: 41 [2020-07-21 20:54:56,705 INFO L226 Difference]: Without dead ends: 36 [2020-07-21 20:54:56,705 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 20:54:56,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-21 20:54:56,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-21 20:54:56,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 20:54:56,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-07-21 20:54:56,715 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 20 [2020-07-21 20:54:56,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:54:56,716 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-07-21 20:54:56,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 20:54:56,716 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-07-21 20:54:56,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 20:54:56,718 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:54:56,718 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:54:56,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:54:56,932 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:54:56,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:54:56,933 INFO L82 PathProgramCache]: Analyzing trace with hash -984989960, now seen corresponding path program 1 times [2020-07-21 20:54:56,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:54:56,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450928756] [2020-07-21 20:54:56,935 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 20:54:56,968 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:54:56,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:54:56,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 20:54:56,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:54:57,022 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 20:54:57,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:54:57,054 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:54:57,125 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-07-21 20:54:57,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450928756] [2020-07-21 20:54:57,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-21 20:54:57,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2020-07-21 20:54:57,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896130921] [2020-07-21 20:54:57,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 20:54:57,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:54:57,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 20:54:57,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 20:54:57,128 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 5 states. [2020-07-21 20:54:57,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:54:57,176 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-07-21 20:54:57,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 20:54:57,177 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-07-21 20:54:57,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:54:57,179 INFO L225 Difference]: With dead ends: 42 [2020-07-21 20:54:57,179 INFO L226 Difference]: Without dead ends: 40 [2020-07-21 20:54:57,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-21 20:54:57,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-21 20:54:57,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-07-21 20:54:57,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 20:54:57,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-07-21 20:54:57,189 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 27 [2020-07-21 20:54:57,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:54:57,189 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-07-21 20:54:57,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 20:54:57,189 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-07-21 20:54:57,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-21 20:54:57,190 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:54:57,191 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:54:57,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:54:57,405 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:54:57,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:54:57,405 INFO L82 PathProgramCache]: Analyzing trace with hash -2135406385, now seen corresponding path program 2 times [2020-07-21 20:54:57,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:54:57,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [798724628] [2020-07-21 20:54:57,406 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 20:54:57,440 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:54:57,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:54:57,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 20:54:57,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:54:57,492 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-07-21 20:54:57,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:54:57,508 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:54:57,564 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-07-21 20:54:57,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [798724628] [2020-07-21 20:54:57,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:54:57,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-21 20:54:57,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504916981] [2020-07-21 20:54:57,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 20:54:57,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:54:57,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 20:54:57,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-21 20:54:57,567 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 8 states. [2020-07-21 20:55:05,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:55:05,368 INFO L93 Difference]: Finished difference Result 74 states and 94 transitions. [2020-07-21 20:55:05,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 20:55:05,370 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-07-21 20:55:05,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:55:05,374 INFO L225 Difference]: With dead ends: 74 [2020-07-21 20:55:05,375 INFO L226 Difference]: Without dead ends: 69 [2020-07-21 20:55:05,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-07-21 20:55:05,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-21 20:55:05,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2020-07-21 20:55:05,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-21 20:55:05,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2020-07-21 20:55:05,394 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 32 [2020-07-21 20:55:05,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:55:05,395 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2020-07-21 20:55:05,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 20:55:05,395 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2020-07-21 20:55:05,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 20:55:05,397 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:55:05,397 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:55:05,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:55:05,611 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:55:05,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:55:05,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1300456723, now seen corresponding path program 3 times [2020-07-21 20:55:05,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:55:05,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999038314] [2020-07-21 20:55:05,613 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 20:55:05,654 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:55:05,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:55:05,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 20:55:05,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:55:05,749 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-07-21 20:55:05,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:55:05,777 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:55:05,884 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-07-21 20:55:05,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999038314] [2020-07-21 20:55:05,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-21 20:55:05,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2020-07-21 20:55:05,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122045071] [2020-07-21 20:55:05,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 20:55:05,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:55:05,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 20:55:05,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-21 20:55:05,887 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand 5 states. [2020-07-21 20:55:05,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:55:05,996 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2020-07-21 20:55:05,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 20:55:05,997 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-07-21 20:55:05,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:55:05,998 INFO L225 Difference]: With dead ends: 76 [2020-07-21 20:55:05,998 INFO L226 Difference]: Without dead ends: 70 [2020-07-21 20:55:05,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-07-21 20:55:06,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-21 20:55:06,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-07-21 20:55:06,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-21 20:55:06,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2020-07-21 20:55:06,016 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 54 [2020-07-21 20:55:06,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:55:06,017 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2020-07-21 20:55:06,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 20:55:06,017 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2020-07-21 20:55:06,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-07-21 20:55:06,021 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:55:06,022 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:55:06,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:55:06,223 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:55:06,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:55:06,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1996269958, now seen corresponding path program 4 times [2020-07-21 20:55:06,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:55:06,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033157537] [2020-07-21 20:55:06,225 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 20:55:06,283 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:55:06,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:55:06,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-21 20:55:06,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:55:06,512 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 26 proven. 42 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-07-21 20:55:06,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:55:06,560 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:55:06,858 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 26 proven. 42 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-07-21 20:55:06,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033157537] [2020-07-21 20:55:06,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:55:06,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-21 20:55:06,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906869936] [2020-07-21 20:55:06,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 20:55:06,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:55:06,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 20:55:06,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-21 20:55:06,861 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand 14 states. [2020-07-21 20:55:21,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:55:21,936 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2020-07-21 20:55:21,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 20:55:21,939 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 83 [2020-07-21 20:55:21,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:55:21,941 INFO L225 Difference]: With dead ends: 81 [2020-07-21 20:55:21,941 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 20:55:21,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 151 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-07-21 20:55:21,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 20:55:21,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 20:55:21,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 20:55:21,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 20:55:21,944 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 83 [2020-07-21 20:55:21,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:55:21,944 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 20:55:21,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 20:55:21,944 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 20:55:21,945 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 20:55:22,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:55:22,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 20:55:32,888 WARN L193 SmtUtils]: Spent 10.53 s on a formula simplification. DAG size of input: 53 DAG size of output: 18 [2020-07-21 20:55:44,588 WARN L193 SmtUtils]: Spent 11.70 s on a formula simplification. DAG size of input: 53 DAG size of output: 18 [2020-07-21 20:55:55,268 WARN L193 SmtUtils]: Spent 10.68 s on a formula simplification. DAG size of input: 35 DAG size of output: 18 [2020-07-21 20:56:07,337 WARN L193 SmtUtils]: Spent 12.07 s on a formula simplification. DAG size of input: 35 DAG size of output: 18 [2020-07-21 20:56:20,587 WARN L193 SmtUtils]: Spent 13.25 s on a formula simplification. DAG size of input: 53 DAG size of output: 18 [2020-07-21 20:56:21,445 WARN L193 SmtUtils]: Spent 846.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-21 20:56:33,453 WARN L193 SmtUtils]: Spent 12.01 s on a formula simplification. DAG size of input: 53 DAG size of output: 18 [2020-07-21 20:56:33,456 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 20:56:33,456 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 20:56:33,456 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 20:56:33,456 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 20:56:33,456 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 20:56:33,456 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 20:56:33,456 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 6 8) no Hoare annotation was computed. [2020-07-21 20:56:33,456 INFO L268 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-07-21 20:56:33,457 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2020-07-21 20:56:33,457 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2020-07-21 20:56:33,457 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 18 45) the Hoare annotation is: true [2020-07-21 20:56:33,457 INFO L268 CegarLoopResult]: For program point L29(lines 26 38) no Hoare annotation was computed. [2020-07-21 20:56:33,457 INFO L264 CegarLoopResult]: At program point L28(line 28) the Hoare annotation is: (let ((.cse0 (* main_~a~0 2))) (and (= (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1) (* main_~s~0 4)) (= (+ .cse0 1) main_~t~0) (= (+ (* main_~a~0 main_~a~0) .cse0 1) main_~s~0))) [2020-07-21 20:56:33,457 INFO L264 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: (let ((.cse0 (* main_~a~0 2))) (and (= (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1) (* main_~s~0 4)) (= (+ .cse0 1) main_~t~0) (= (+ (* main_~a~0 main_~a~0) .cse0 1) main_~s~0))) [2020-07-21 20:56:33,457 INFO L264 CegarLoopResult]: At program point L27-1(line 27) the Hoare annotation is: (let ((.cse0 (* main_~a~0 2))) (and (= (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1) (* main_~s~0 4)) (= (+ .cse0 1) main_~t~0) (= (+ (* main_~a~0 main_~a~0) .cse0 1) main_~s~0))) [2020-07-21 20:56:33,457 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 18 45) no Hoare annotation was computed. [2020-07-21 20:56:33,458 INFO L264 CegarLoopResult]: At program point L26-2(lines 26 38) the Hoare annotation is: (let ((.cse0 (* main_~a~0 2))) (and (= (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1) (* main_~s~0 4)) (= (+ .cse0 1) main_~t~0) (= (+ (* main_~a~0 main_~a~0) .cse0 1) main_~s~0))) [2020-07-21 20:56:33,458 INFO L264 CegarLoopResult]: At program point L26-3(lines 26 38) the Hoare annotation is: (let ((.cse0 (* main_~a~0 2))) (and (= (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1) (* main_~s~0 4)) (= (+ .cse0 1) main_~t~0) (= (+ (* main_~a~0 main_~a~0) .cse0 1) main_~s~0))) [2020-07-21 20:56:33,458 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 18 45) no Hoare annotation was computed. [2020-07-21 20:56:33,458 INFO L268 CegarLoopResult]: For program point L42(line 42) no Hoare annotation was computed. [2020-07-21 20:56:33,458 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (or (and (= (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1) (* main_~s~0 4)) (= (+ (* main_~a~0 2) 1) main_~t~0)) (and (= 1 main_~s~0) (= 1 main_~t~0))) [2020-07-21 20:56:33,459 INFO L264 CegarLoopResult]: At program point L40(line 40) the Hoare annotation is: (let ((.cse0 (* main_~a~0 2))) (and (= (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1) (* main_~s~0 4)) (= (+ .cse0 1) main_~t~0) (= (+ (* main_~a~0 main_~a~0) .cse0 1) main_~s~0))) [2020-07-21 20:56:33,459 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2020-07-21 20:56:33,459 INFO L268 CegarLoopResult]: For program point L11(lines 11 12) no Hoare annotation was computed. [2020-07-21 20:56:33,459 INFO L268 CegarLoopResult]: For program point L10(lines 10 13) no Hoare annotation was computed. [2020-07-21 20:56:33,459 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2020-07-21 20:56:33,459 INFO L268 CegarLoopResult]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2020-07-21 20:56:33,459 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-07-21 20:56:33,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 08:56:33 BoogieIcfgContainer [2020-07-21 20:56:33,477 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 20:56:33,479 INFO L168 Benchmark]: Toolchain (without parser) took 98804.39 ms. Allocated memory was 145.2 MB in the beginning and 246.4 MB in the end (delta: 101.2 MB). Free memory was 102.5 MB in the beginning and 197.8 MB in the end (delta: -95.3 MB). Peak memory consumption was 107.3 MB. Max. memory is 7.1 GB. [2020-07-21 20:56:33,480 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 145.2 MB. Free memory is still 121.0 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 20:56:33,481 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.26 ms. Allocated memory is still 145.2 MB. Free memory was 102.1 MB in the beginning and 92.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-21 20:56:33,482 INFO L168 Benchmark]: Boogie Preprocessor took 116.29 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 92.5 MB in the beginning and 180.5 MB in the end (delta: -88.0 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-21 20:56:33,482 INFO L168 Benchmark]: RCFGBuilder took 275.67 ms. Allocated memory is still 202.4 MB. Free memory was 180.5 MB in the beginning and 168.1 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-07-21 20:56:33,483 INFO L168 Benchmark]: TraceAbstraction took 98160.57 ms. Allocated memory was 202.4 MB in the beginning and 246.4 MB in the end (delta: 44.0 MB). Free memory was 167.1 MB in the beginning and 197.8 MB in the end (delta: -30.7 MB). Peak memory consumption was 114.8 MB. Max. memory is 7.1 GB. [2020-07-21 20:56:33,487 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 145.2 MB. Free memory is still 121.0 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 246.26 ms. Allocated memory is still 145.2 MB. Free memory was 102.1 MB in the beginning and 92.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.29 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 92.5 MB in the beginning and 180.5 MB in the end (delta: -88.0 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 275.67 ms. Allocated memory is still 202.4 MB. Free memory was 180.5 MB in the beginning and 168.1 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 98160.57 ms. Allocated memory was 202.4 MB in the beginning and 246.4 MB in the end (delta: 44.0 MB). Free memory was 167.1 MB in the beginning and 197.8 MB in the end (delta: -30.7 MB). Peak memory consumption was 114.8 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: 26]: Loop Invariant Derived loop invariant: (t * t + t * 2 + 1 == s * 4 && a * 2 + 1 == t) && a * a + a * 2 + 1 == s - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 26.7s, OverallIterations: 7, TraceHistogramMax: 14, AutomataDifference: 23.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 71.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 181 SDtfs, 59 SDslu, 606 SDs, 0 SdLazy, 424 SolverSat, 82 SolverUnsat, 10 SolverUnknown, 0 SolverNotchecked, 22.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 442 GetRequests, 383 SyntacticMatches, 10 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 6 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 49 PreInvPairs, 87 NumberOfFragments, 213 HoareAnnotationTreeSize, 49 FomulaSimplifications, 207 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 12 FomulaSimplificationsInter, 1064 FormulaSimplificationTreeSizeReductionInter, 71.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 241 NumberOfCodeBlocks, 206 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 426 ConstructedInterpolants, 0 QuantifiedInterpolants, 88399 SizeOfPredicates, 16 NumberOfNonLiveVariables, 506 ConjunctsInSsa, 95 ConjunctsInUnsatCore, 11 InterpolantComputations, 5 PerfectInterpolantSequences, 1057/1162 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...