/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 BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/geo2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 23:41:39,408 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 23:41:39,410 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 23:41:39,428 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 23:41:39,428 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 23:41:39,430 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 23:41:39,432 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 23:41:39,441 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 23:41:39,446 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 23:41:39,448 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 23:41:39,449 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 23:41:39,450 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 23:41:39,451 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 23:41:39,452 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 23:41:39,454 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 23:41:39,455 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 23:41:39,457 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 23:41:39,457 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 23:41:39,459 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 23:41:39,463 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 23:41:39,467 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 23:41:39,470 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 23:41:39,471 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 23:41:39,472 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 23:41:39,474 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 23:41:39,484 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 23:41:39,484 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 23:41:39,485 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 23:41:39,486 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 23:41:39,522 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 23:41:39,523 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 23:41:39,524 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 23:41:39,524 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 23:41:39,524 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 23:41:39,525 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 23:41:39,525 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 23:41:39,525 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 23:41:39,525 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 23:41:39,526 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 23:41:39,526 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 23:41:39,527 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 23:41:39,527 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 23:41:39,527 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 23:41:39,527 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 23:41:39,527 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 23:41:39,528 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 23:41:39,528 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 23:41:39,528 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 23:41:39,529 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 23:41:39,529 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 23:41:39,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:41:39,530 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 23:41:39,530 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 23:41:39,530 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 23:41:39,530 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 23:41:39,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:41:39,531 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 23:41:39,531 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 23:41:39,531 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 -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 23:41:39,808 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 23:41:39,828 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 23:41:39,831 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 23:41:39,833 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 23:41:39,835 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 23:41:39,836 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/geo2.c [2020-07-21 23:41:39,909 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/094f1097f/fac401758763499a85462de051a1dc2c/FLAG577bb0096 [2020-07-21 23:41:40,356 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 23:41:40,357 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/geo2.c [2020-07-21 23:41:40,364 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/094f1097f/fac401758763499a85462de051a1dc2c/FLAG577bb0096 [2020-07-21 23:41:40,713 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/094f1097f/fac401758763499a85462de051a1dc2c [2020-07-21 23:41:40,724 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 23:41:40,727 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 23:41:40,728 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 23:41:40,728 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 23:41:40,731 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 23:41:40,732 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:41:40" (1/1) ... [2020-07-21 23:41:40,735 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@740fa54f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:41:40, skipping insertion in model container [2020-07-21 23:41:40,736 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:41:40" (1/1) ... [2020-07-21 23:41:40,743 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 23:41:40,762 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 23:41:40,958 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:41:40,962 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 23:41:40,982 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:41:40,997 INFO L208 MainTranslator]: Completed translation [2020-07-21 23:41:40,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:41:40 WrapperNode [2020-07-21 23:41:40,997 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 23:41:40,998 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 23:41:40,998 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 23:41:40,998 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 23:41:41,011 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:41:40" (1/1) ... [2020-07-21 23:41:41,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:41:40" (1/1) ... [2020-07-21 23:41:41,017 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:41:40" (1/1) ... [2020-07-21 23:41:41,017 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:41:40" (1/1) ... [2020-07-21 23:41:41,021 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:41:40" (1/1) ... [2020-07-21 23:41:41,025 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:41:40" (1/1) ... [2020-07-21 23:41:41,026 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:41:40" (1/1) ... [2020-07-21 23:41:41,028 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 23:41:41,028 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 23:41:41,029 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 23:41:41,029 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 23:41:41,029 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:41:40" (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 23:41:41,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 23:41:41,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 23:41:41,228 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 23:41:41,228 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 23:41:41,229 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 23:41:41,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 23:41:41,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 23:41:41,229 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 23:41:41,229 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 23:41:41,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 23:41:41,230 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 23:41:41,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 23:41:41,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 23:41:41,413 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 23:41:41,413 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 23:41:41,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:41:41 BoogieIcfgContainer [2020-07-21 23:41:41,417 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 23:41:41,418 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 23:41:41,418 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 23:41:41,421 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 23:41:41,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:41:40" (1/3) ... [2020-07-21 23:41:41,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a8423c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:41:41, skipping insertion in model container [2020-07-21 23:41:41,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:41:40" (2/3) ... [2020-07-21 23:41:41,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a8423c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:41:41, skipping insertion in model container [2020-07-21 23:41:41,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:41:41" (3/3) ... [2020-07-21 23:41:41,424 INFO L109 eAbstractionObserver]: Analyzing ICFG geo2.c [2020-07-21 23:41:41,434 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 23:41:41,441 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 23:41:41,453 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 23:41:41,476 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 23:41:41,476 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 23:41:41,476 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 23:41:41,477 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 23:41:41,477 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 23:41:41,477 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 23:41:41,477 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 23:41:41,477 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 23:41:41,495 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-21 23:41:41,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 23:41:41,500 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:41:41,501 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:41:41,502 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:41:41,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:41:41,507 INFO L82 PathProgramCache]: Analyzing trace with hash -64610451, now seen corresponding path program 1 times [2020-07-21 23:41:41,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:41:41,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5590682] [2020-07-21 23:41:41,516 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:41:41,577 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:41:41,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:41:41,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 23:41:41,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:41:41,613 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 23:41:41,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:41:41,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5590682] [2020-07-21 23:41:41,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:41:41,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 23:41:41,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850540137] [2020-07-21 23:41:41,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 23:41:41,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:41:41,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 23:41:41,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 23:41:41,647 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-07-21 23:41:41,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:41:41,672 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2020-07-21 23:41:41,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 23:41:41,674 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-21 23:41:41,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:41:41,684 INFO L225 Difference]: With dead ends: 35 [2020-07-21 23:41:41,684 INFO L226 Difference]: Without dead ends: 15 [2020-07-21 23:41:41,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 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 23:41:41,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-21 23:41:41,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-21 23:41:41,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-21 23:41:41,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-21 23:41:41,728 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-07-21 23:41:41,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:41:41,728 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-21 23:41:41,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 23:41:41,729 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-21 23:41:41,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 23:41:41,729 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:41:41,730 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:41:41,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:41:41,940 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:41:41,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:41:41,941 INFO L82 PathProgramCache]: Analyzing trace with hash -62822991, now seen corresponding path program 1 times [2020-07-21 23:41:41,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:41:41,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931135310] [2020-07-21 23:41:41,943 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:41:41,976 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:41:41,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:41:41,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 23:41:41,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:41:42,065 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 23:41:42,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:41:42,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931135310] [2020-07-21 23:41:42,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:41:42,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 23:41:42,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959768653] [2020-07-21 23:41:42,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 23:41:42,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:41:42,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 23:41:42,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:41:42,072 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2020-07-21 23:41:42,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:41:42,136 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-07-21 23:41:42,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 23:41:42,137 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-21 23:41:42,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:41:42,138 INFO L225 Difference]: With dead ends: 25 [2020-07-21 23:41:42,138 INFO L226 Difference]: Without dead ends: 22 [2020-07-21 23:41:42,140 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 23:41:42,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-21 23:41:42,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-21 23:41:42,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-21 23:41:42,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-07-21 23:41:42,148 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 10 [2020-07-21 23:41:42,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:41:42,148 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-07-21 23:41:42,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 23:41:42,149 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-07-21 23:41:42,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 23:41:42,150 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:41:42,150 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:41:42,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:41:42,352 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:41:42,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:41:42,353 INFO L82 PathProgramCache]: Analyzing trace with hash 50868238, now seen corresponding path program 1 times [2020-07-21 23:41:42,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:41:42,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367150694] [2020-07-21 23:41:42,355 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:41:42,394 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:41:42,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:41:42,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 23:41:42,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:41:42,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:41:42,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:41:42,518 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:41:46,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:41:46,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367150694] [2020-07-21 23:41:46,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:41:46,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-21 23:41:46,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458218973] [2020-07-21 23:41:46,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 23:41:46,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:41:46,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 23:41:46,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=38, Unknown=2, NotChecked=0, Total=56 [2020-07-21 23:41:46,715 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 8 states. [2020-07-21 23:42:01,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:42:01,047 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-07-21 23:42:01,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 23:42:01,050 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-07-21 23:42:01,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:42:01,051 INFO L225 Difference]: With dead ends: 32 [2020-07-21 23:42:01,052 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 23:42:01,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=20, Invalid=50, Unknown=2, NotChecked=0, Total=72 [2020-07-21 23:42:01,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 23:42:01,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-07-21 23:42:01,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-21 23:42:01,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-07-21 23:42:01,060 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 17 [2020-07-21 23:42:01,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:42:01,061 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-07-21 23:42:01,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 23:42:01,061 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-07-21 23:42:01,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 23:42:01,062 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:42:01,063 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:42:01,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:42:01,264 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:42:01,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:42:01,265 INFO L82 PathProgramCache]: Analyzing trace with hash 325764102, now seen corresponding path program 1 times [2020-07-21 23:42:01,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:42:01,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077458110] [2020-07-21 23:42:01,267 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:42:01,307 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:42:01,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:42:01,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 23:42:01,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:42:01,422 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:42:01,491 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 23:42:01,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:42:01,511 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:42:01,590 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-21 23:42:01,591 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:42:01,603 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:42:01,639 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 23:42:01,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077458110] [2020-07-21 23:42:01,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:42:01,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-07-21 23:42:01,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262978865] [2020-07-21 23:42:01,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 23:42:01,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:42:01,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 23:42:01,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-21 23:42:01,642 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 8 states. [2020-07-21 23:42:03,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:42:03,923 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-07-21 23:42:03,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 23:42:03,923 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-07-21 23:42:03,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:42:03,926 INFO L225 Difference]: With dead ends: 34 [2020-07-21 23:42:03,926 INFO L226 Difference]: Without dead ends: 27 [2020-07-21 23:42:03,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-07-21 23:42:03,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-21 23:42:03,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-21 23:42:03,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 23:42:03,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-07-21 23:42:03,934 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 23 [2020-07-21 23:42:03,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:42:03,934 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-07-21 23:42:03,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 23:42:03,934 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-07-21 23:42:03,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 23:42:03,935 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:42:03,935 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:42:04,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:42:04,136 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:42:04,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:42:04,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1538749201, now seen corresponding path program 2 times [2020-07-21 23:42:04,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:42:04,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846343483] [2020-07-21 23:42:04,139 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:42:04,168 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:42:04,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:42:04,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 23:42:04,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:42:10,570 WARN L193 SmtUtils]: Spent 4.29 s on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 23:42:10,680 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 23:42:10,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:42:10,707 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:42:23,929 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 23:42:23,941 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-21 23:42:23,941 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:42:25,994 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~x~0 c_main_~z~0))) (or (= (+ c_main_~z~0 (* c_main_~x~0 c_main_~z~0 c_main_~z~0)) (+ .cse0 (* c_main_~y~0 c_main_~z~0 c_main_~z~0))) (not (= (+ .cse0 1) (+ (* c_main_~y~0 c_main_~z~0) c_main_~x~0))))) is different from true [2020-07-21 23:42:26,000 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:42:26,100 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:42:28,609 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~x~0 c_main_~z~0 c_main_~z~0))) (or (not (= (+ (* c_main_~x~0 c_main_~z~0) (* c_main_~y~0 c_main_~z~0 c_main_~z~0)) (+ c_main_~z~0 .cse0))) (= (+ .cse0 (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~z~0)) (+ (* c_main_~z~0 c_main_~z~0) (* c_main_~x~0 c_main_~z~0 c_main_~z~0 c_main_~z~0))))) is different from true [2020-07-21 23:42:28,625 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:42:28,637 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 7 not checked. [2020-07-21 23:42:28,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846343483] [2020-07-21 23:42:28,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:42:28,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2020-07-21 23:42:28,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174141258] [2020-07-21 23:42:28,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 23:42:28,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:42:28,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 23:42:28,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=120, Unknown=9, NotChecked=46, Total=210 [2020-07-21 23:42:28,640 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 15 states. [2020-07-21 23:42:49,720 WARN L193 SmtUtils]: Spent 14.39 s on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2020-07-21 23:42:59,728 WARN L193 SmtUtils]: Spent 5.54 s on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 23:43:16,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:43:16,572 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-07-21 23:43:16,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 23:43:16,596 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2020-07-21 23:43:16,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:43:16,597 INFO L225 Difference]: With dead ends: 37 [2020-07-21 23:43:16,598 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 23:43:16,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 48.1s TimeCoverageRelationStatistics Valid=58, Invalid=211, Unknown=11, NotChecked=62, Total=342 [2020-07-21 23:43:16,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 23:43:16,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-07-21 23:43:16,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-21 23:43:16,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-07-21 23:43:16,606 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 24 [2020-07-21 23:43:16,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:43:16,606 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-07-21 23:43:16,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 23:43:16,606 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-07-21 23:43:16,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 23:43:16,607 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:43:16,608 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:43:16,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:43:16,814 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:43:16,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:43:16,814 INFO L82 PathProgramCache]: Analyzing trace with hash -695576914, now seen corresponding path program 3 times [2020-07-21 23:43:16,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:43:16,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794592961] [2020-07-21 23:43:16,816 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:43:16,869 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:43:16,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:43:16,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 23:43:16,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:43:19,303 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:43:25,507 WARN L838 $PredicateComparison]: unable to prove that (or (<= 1 |c___VERIFIER_assert_#in~cond|) (and (exists ((v_main_~x~0_20 Int) (v_main_~z~0_BEFORE_CALL_10 Int) (v_main_~y~0_21 Int)) (let ((.cse0 (* v_main_~x~0_20 v_main_~z~0_BEFORE_CALL_10))) (and (= (+ .cse0 1) (+ (* v_main_~y~0_21 v_main_~z~0_BEFORE_CALL_10) v_main_~x~0_20)) (not (= (+ v_main_~z~0_BEFORE_CALL_10 (* v_main_~x~0_20 v_main_~z~0_BEFORE_CALL_10 v_main_~z~0_BEFORE_CALL_10)) (+ .cse0 (* v_main_~z~0_BEFORE_CALL_10 v_main_~z~0_BEFORE_CALL_10 v_main_~y~0_21))))))) (<= 0 |c___VERIFIER_assert_#in~cond|))) is different from false [2020-07-21 23:43:25,511 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:43:51,735 WARN L193 SmtUtils]: Spent 14.37 s on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 23:43:53,783 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:44:02,016 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~x~0_20 Int) (v_main_~y~0_21 Int) (v_main_~z~0_BEFORE_CALL_10 Int)) (let ((.cse0 (* v_main_~x~0_20 v_main_~z~0_BEFORE_CALL_10))) (and (= (+ .cse0 1) (+ (* v_main_~y~0_21 v_main_~z~0_BEFORE_CALL_10) v_main_~x~0_20)) (not (= (+ v_main_~z~0_BEFORE_CALL_10 (* v_main_~x~0_20 v_main_~z~0_BEFORE_CALL_10 v_main_~z~0_BEFORE_CALL_10)) (+ .cse0 (* v_main_~z~0_BEFORE_CALL_10 v_main_~z~0_BEFORE_CALL_10 v_main_~y~0_21))))))) is different from false [2020-07-21 23:44:04,039 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~x~0_20 Int) (v_main_~y~0_21 Int) (v_main_~z~0_BEFORE_CALL_10 Int)) (let ((.cse0 (* v_main_~x~0_20 v_main_~z~0_BEFORE_CALL_10))) (and (= (+ .cse0 1) (+ (* v_main_~y~0_21 v_main_~z~0_BEFORE_CALL_10) v_main_~x~0_20)) (not (= (+ v_main_~z~0_BEFORE_CALL_10 (* v_main_~x~0_20 v_main_~z~0_BEFORE_CALL_10 v_main_~z~0_BEFORE_CALL_10)) (+ .cse0 (* v_main_~z~0_BEFORE_CALL_10 v_main_~z~0_BEFORE_CALL_10 v_main_~y~0_21))))))) is different from true [2020-07-21 23:44:04,043 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-07-21 23:44:04,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:44:07,989 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:44:15,154 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 23:44:16,097 WARN L193 SmtUtils]: Spent 942.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 23:44:16,107 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-21 23:44:16,107 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:44:18,164 WARN L860 $PredicateComparison]: unable to prove that (forall ((main_~x~0 Int) (main_~y~0 Int)) (let ((.cse0 (* main_~x~0 c_main_~z~0))) (or (= (+ .cse0 (* main_~y~0 c_main_~z~0 c_main_~z~0)) (+ c_main_~z~0 (* main_~x~0 c_main_~z~0 c_main_~z~0))) (not (= (+ .cse0 1) (+ (* main_~y~0 c_main_~z~0) main_~x~0)))))) is different from true [2020-07-21 23:44:18,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794592961] [2020-07-21 23:44:18,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 23:44:18,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-21 23:44:18,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139446449] [2020-07-21 23:44:18,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 23:44:18,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:44:18,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 23:44:18,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=87, Unknown=8, NotChecked=60, Total=182 [2020-07-21 23:44:18,167 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 10 states. [2020-07-21 23:44:29,470 WARN L838 $PredicateComparison]: unable to prove that (and (or (and (exists ((v_main_~x~0_20 Int) (v_main_~y~0_21 Int) (v_main_~z~0_BEFORE_CALL_10 Int)) (let ((.cse0 (* v_main_~x~0_20 v_main_~z~0_BEFORE_CALL_10))) (and (= (+ .cse0 1) (+ (* v_main_~y~0_21 v_main_~z~0_BEFORE_CALL_10) v_main_~x~0_20)) (not (= (+ v_main_~z~0_BEFORE_CALL_10 (* v_main_~x~0_20 v_main_~z~0_BEFORE_CALL_10 v_main_~z~0_BEFORE_CALL_10)) (+ .cse0 (* v_main_~z~0_BEFORE_CALL_10 v_main_~z~0_BEFORE_CALL_10 v_main_~y~0_21))))))) (<= 0 c___VERIFIER_assert_~cond)) (<= 1 c___VERIFIER_assert_~cond)) (= |c___VERIFIER_assert_#in~cond| c___VERIFIER_assert_~cond)) is different from false [2020-07-21 23:44:40,064 WARN L193 SmtUtils]: Spent 4.07 s on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 23:44:42,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:44:42,623 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-07-21 23:44:42,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 23:44:42,629 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-07-21 23:44:42,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:44:42,630 INFO L225 Difference]: With dead ends: 34 [2020-07-21 23:44:42,630 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 23:44:42,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 54.6s TimeCoverageRelationStatistics Valid=42, Invalid=145, Unknown=11, NotChecked=108, Total=306 [2020-07-21 23:44:42,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 23:44:42,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 23:44:42,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 23:44:42,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 23:44:42,632 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-07-21 23:44:42,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:44:42,632 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 23:44:42,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 23:44:42,633 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 23:44:42,633 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 23:44:42,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:44:42,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 23:44:43,958 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 13 DAG size of output: 9 [2020-07-21 23:44:52,527 WARN L193 SmtUtils]: Spent 8.57 s on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2020-07-21 23:44:57,318 WARN L193 SmtUtils]: Spent 4.78 s on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2020-07-21 23:44:57,321 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 23:44:57,321 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 23:44:57,321 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 23:44:57,321 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 23:44:57,321 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 23:44:57,321 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 23:44:57,322 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 9 11) no Hoare annotation was computed. [2020-07-21 23:44:57,322 INFO L268 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2020-07-21 23:44:57,322 INFO L268 CegarLoopResult]: For program point L10-2(lines 9 11) no Hoare annotation was computed. [2020-07-21 23:44:57,322 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 9 11) no Hoare annotation was computed. [2020-07-21 23:44:57,322 INFO L264 CegarLoopResult]: At program point L32(line 32) the Hoare annotation is: (or (and (= (+ (* main_~x~0 main_~z~0) 1) (+ main_~x~0 (* main_~y~0 main_~z~0))) (= 1 main_~y~0)) (exists ((v_main_~x~0_20 Int) (v_main_~y~0_21 Int)) (let ((.cse1 (+ (* v_main_~x~0_20 main_~z~0) 1)) (.cse0 (* v_main_~y~0_21 main_~z~0))) (and (= main_~y~0 .cse0) (= .cse1 main_~x~0) (= .cse1 (+ .cse0 v_main_~x~0_20)))))) [2020-07-21 23:44:57,322 INFO L268 CegarLoopResult]: For program point L32-1(lines 31 40) no Hoare annotation was computed. [2020-07-21 23:44:57,323 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 21 43) the Hoare annotation is: true [2020-07-21 23:44:57,323 INFO L264 CegarLoopResult]: At program point L31-2(lines 31 40) the Hoare annotation is: (or (and (= (+ (* main_~x~0 main_~z~0) 1) (+ main_~x~0 (* main_~y~0 main_~z~0))) (= 1 main_~y~0)) (exists ((v_main_~x~0_20 Int) (v_main_~y~0_21 Int)) (let ((.cse1 (+ (* v_main_~x~0_20 main_~z~0) 1)) (.cse0 (* v_main_~y~0_21 main_~z~0))) (and (= main_~y~0 .cse0) (= .cse1 main_~x~0) (= .cse1 (+ .cse0 v_main_~x~0_20)))))) [2020-07-21 23:44:57,323 INFO L264 CegarLoopResult]: At program point L31-3(lines 31 40) the Hoare annotation is: (= (+ (* main_~x~0 main_~z~0) 1) (+ main_~x~0 (* main_~y~0 main_~z~0))) [2020-07-21 23:44:57,323 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 21 43) no Hoare annotation was computed. [2020-07-21 23:44:57,323 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 21 43) no Hoare annotation was computed. [2020-07-21 23:44:57,323 INFO L268 CegarLoopResult]: For program point L41(line 41) no Hoare annotation was computed. [2020-07-21 23:44:57,323 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 12 18) the Hoare annotation is: true [2020-07-21 23:44:57,324 INFO L268 CegarLoopResult]: For program point L14(lines 14 15) no Hoare annotation was computed. [2020-07-21 23:44:57,324 INFO L268 CegarLoopResult]: For program point L13(lines 13 16) no Hoare annotation was computed. [2020-07-21 23:44:57,324 INFO L268 CegarLoopResult]: For program point L13-2(lines 12 18) no Hoare annotation was computed. [2020-07-21 23:44:57,324 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 12 18) no Hoare annotation was computed. [2020-07-21 23:44:57,324 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2020-07-21 23:44:57,332 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_21,QUANTIFIED] [2020-07-21 23:44:57,333 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_20,QUANTIFIED] [2020-07-21 23:44:57,333 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_20,QUANTIFIED] [2020-07-21 23:44:57,333 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_21,QUANTIFIED] [2020-07-21 23:44:57,333 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_20,QUANTIFIED] [2020-07-21 23:44:57,343 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_21,QUANTIFIED] [2020-07-21 23:44:57,344 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_20,QUANTIFIED] [2020-07-21 23:44:57,344 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_20,QUANTIFIED] [2020-07-21 23:44:57,344 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_21,QUANTIFIED] [2020-07-21 23:44:57,344 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_20,QUANTIFIED] [2020-07-21 23:44:57,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:44:57 BoogieIcfgContainer [2020-07-21 23:44:57,349 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 23:44:57,351 INFO L168 Benchmark]: Toolchain (without parser) took 196625.99 ms. Allocated memory was 135.8 MB in the beginning and 246.9 MB in the end (delta: 111.1 MB). Free memory was 101.0 MB in the beginning and 192.7 MB in the end (delta: -91.6 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. [2020-07-21 23:44:57,352 INFO L168 Benchmark]: CDTParser took 0.44 ms. Allocated memory is still 135.8 MB. Free memory was 118.9 MB in the beginning and 118.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 23:44:57,353 INFO L168 Benchmark]: CACSL2BoogieTranslator took 270.05 ms. Allocated memory is still 135.8 MB. Free memory was 100.6 MB in the beginning and 91.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-21 23:44:57,354 INFO L168 Benchmark]: Boogie Preprocessor took 29.99 ms. Allocated memory is still 135.8 MB. Free memory was 91.0 MB in the beginning and 89.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-21 23:44:57,355 INFO L168 Benchmark]: RCFGBuilder took 388.55 ms. Allocated memory was 135.8 MB in the beginning and 203.4 MB in the end (delta: 67.6 MB). Free memory was 89.4 MB in the beginning and 170.2 MB in the end (delta: -80.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-07-21 23:44:57,355 INFO L168 Benchmark]: TraceAbstraction took 195931.44 ms. Allocated memory was 203.4 MB in the beginning and 246.9 MB in the end (delta: 43.5 MB). Free memory was 169.5 MB in the beginning and 192.7 MB in the end (delta: -23.2 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. [2020-07-21 23:44:57,365 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44 ms. Allocated memory is still 135.8 MB. Free memory was 118.9 MB in the beginning and 118.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 270.05 ms. Allocated memory is still 135.8 MB. Free memory was 100.6 MB in the beginning and 91.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.99 ms. Allocated memory is still 135.8 MB. Free memory was 91.0 MB in the beginning and 89.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 388.55 ms. Allocated memory was 135.8 MB in the beginning and 203.4 MB in the end (delta: 67.6 MB). Free memory was 89.4 MB in the beginning and 170.2 MB in the end (delta: -80.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 195931.44 ms. Allocated memory was 203.4 MB in the beginning and 246.9 MB in the end (delta: 43.5 MB). Free memory was 169.5 MB in the beginning and 192.7 MB in the end (delta: -23.2 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_21,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_20,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_20,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_21,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_20,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_21,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_20,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_20,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_21,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_20,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 15]: 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 [2020-07-21 23:44:57,372 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_21,QUANTIFIED] [2020-07-21 23:44:57,373 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_20,QUANTIFIED] [2020-07-21 23:44:57,373 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_20,QUANTIFIED] [2020-07-21 23:44:57,373 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_21,QUANTIFIED] [2020-07-21 23:44:57,373 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_20,QUANTIFIED] [2020-07-21 23:44:57,373 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_21,QUANTIFIED] [2020-07-21 23:44:57,374 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_20,QUANTIFIED] [2020-07-21 23:44:57,374 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_20,QUANTIFIED] [2020-07-21 23:44:57,374 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_21,QUANTIFIED] [2020-07-21 23:44:57,374 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_20,QUANTIFIED] Derived loop invariant: (x * z + 1 == x + y * z && 1 == y) || (\exists v_main_~x~0_20 : int, v_main_~y~0_21 : int :: (y == v_main_~y~0_21 * z && v_main_~x~0_20 * z + 1 == x) && v_main_~x~0_20 * z + 1 == v_main_~y~0_21 * z + v_main_~x~0_20) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 181.3s, OverallIterations: 6, TraceHistogramMax: 4, AutomataDifference: 89.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 14.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 83 SDtfs, 50 SDslu, 283 SDs, 0 SdLazy, 186 SolverSat, 24 SolverUnsat, 25 SolverUnknown, 0 SolverNotchecked, 50.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 196 GetRequests, 135 SyntacticMatches, 9 SemanticMatches, 52 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 107.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=5, 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, 6 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 15 PreInvPairs, 25 NumberOfFragments, 98 HoareAnnotationTreeSize, 15 FomulaSimplifications, 296 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 89 FormulaSimplificationTreeSizeReductionInter, 14.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 90.5s InterpolantComputationTime, 115 NumberOfCodeBlocks, 110 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 170 ConstructedInterpolants, 5 QuantifiedInterpolants, 19078 SizeOfPredicates, 19 NumberOfNonLiveVariables, 323 ConjunctsInSsa, 69 ConjunctsInUnsatCore, 9 InterpolantComputations, 2 PerfectInterpolantSequences, 62/93 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...