/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 NOT_INCREMENTALLY -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 12:13:31,310 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 12:13:31,312 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 12:13:31,330 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 12:13:31,331 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 12:13:31,332 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 12:13:31,334 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 12:13:31,347 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 12:13:31,349 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 12:13:31,350 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 12:13:31,351 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 12:13:31,353 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 12:13:31,353 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 12:13:31,356 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 12:13:31,358 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 12:13:31,360 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 12:13:31,362 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 12:13:31,364 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 12:13:31,366 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 12:13:31,370 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 12:13:31,374 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 12:13:31,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 12:13:31,376 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 12:13:31,377 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 12:13:31,380 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 12:13:31,395 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 12:13:31,396 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 12:13:31,397 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 12:13:31,398 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 12:13:31,421 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 12:13:31,422 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 12:13:31,424 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 12:13:31,424 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 12:13:31,424 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 12:13:31,424 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 12:13:31,424 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 12:13:31,425 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 12:13:31,425 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 12:13:31,425 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 12:13:31,426 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 12:13:31,426 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 12:13:31,427 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 12:13:31,427 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 12:13:31,427 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 12:13:31,428 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 12:13:31,428 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 12:13:31,428 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 12:13:31,428 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 12:13:31,428 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 12:13:31,429 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 12:13:31,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:13:31,429 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 12:13:31,429 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 12:13:31,429 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 12:13:31,430 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 12:13:31,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:13:31,430 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 12:13:31,430 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 12:13:31,430 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 -> NOT_INCREMENTALLY [2020-07-21 12:13:31,721 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 12:13:31,733 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 12:13:31,737 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 12:13:31,738 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 12:13:31,738 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 12:13:31,739 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/sqrt1.c [2020-07-21 12:13:31,807 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28d22f812/913ca136bd4a48aca035f6ba4eab987b/FLAG20d05d840 [2020-07-21 12:13:32,257 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 12:13:32,258 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/sqrt1.c [2020-07-21 12:13:32,265 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28d22f812/913ca136bd4a48aca035f6ba4eab987b/FLAG20d05d840 [2020-07-21 12:13:32,621 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28d22f812/913ca136bd4a48aca035f6ba4eab987b [2020-07-21 12:13:32,633 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 12:13:32,635 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 12:13:32,636 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 12:13:32,637 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 12:13:32,640 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 12:13:32,641 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:13:32" (1/1) ... [2020-07-21 12:13:32,644 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 12:13:32, skipping insertion in model container [2020-07-21 12:13:32,644 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:13:32" (1/1) ... [2020-07-21 12:13:32,652 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 12:13:32,670 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 12:13:32,823 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:13:32,827 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 12:13:32,847 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:13:32,861 INFO L208 MainTranslator]: Completed translation [2020-07-21 12:13:32,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:13:32 WrapperNode [2020-07-21 12:13:32,862 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 12:13:32,862 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 12:13:32,863 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 12:13:32,863 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 12:13:32,876 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:13:32" (1/1) ... [2020-07-21 12:13:32,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:13:32" (1/1) ... [2020-07-21 12:13:32,882 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:13:32" (1/1) ... [2020-07-21 12:13:32,882 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:13:32" (1/1) ... [2020-07-21 12:13:32,886 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:13:32" (1/1) ... [2020-07-21 12:13:32,891 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:13:32" (1/1) ... [2020-07-21 12:13:32,892 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:13:32" (1/1) ... [2020-07-21 12:13:32,893 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 12:13:32,894 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 12:13:32,894 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 12:13:32,894 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 12:13:32,895 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:13:32" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:13:33,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 12:13:33,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 12:13:33,036 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 12:13:33,037 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 12:13:33,037 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 12:13:33,037 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 12:13:33,037 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 12:13:33,037 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 12:13:33,037 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 12:13:33,037 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 12:13:33,037 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 12:13:33,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 12:13:33,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 12:13:33,227 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 12:13:33,228 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 12:13:33,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:13:33 BoogieIcfgContainer [2020-07-21 12:13:33,231 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 12:13:33,233 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 12:13:33,233 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 12:13:33,236 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 12:13:33,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:13:32" (1/3) ... [2020-07-21 12:13:33,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f23525a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:13:33, skipping insertion in model container [2020-07-21 12:13:33,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:13:32" (2/3) ... [2020-07-21 12:13:33,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f23525a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:13:33, skipping insertion in model container [2020-07-21 12:13:33,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:13:33" (3/3) ... [2020-07-21 12:13:33,239 INFO L109 eAbstractionObserver]: Analyzing ICFG sqrt1.c [2020-07-21 12:13:33,249 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 12:13:33,256 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 12:13:33,270 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 12:13:33,291 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 12:13:33,291 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 12:13:33,292 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 12:13:33,292 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 12:13:33,292 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 12:13:33,292 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 12:13:33,292 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 12:13:33,292 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 12:13:33,307 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-21 12:13:33,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 12:13:33,312 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:13:33,313 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:13:33,313 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:13:33,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:13:33,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1080899301, now seen corresponding path program 1 times [2020-07-21 12:13:33,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:13:33,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513420193] [2020-07-21 12:13:33,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:13:33,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:13:33,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 12:13:33,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:13:33,407 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 12:13:33,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:13:33,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1513420193] [2020-07-21 12:13:33,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:13:33,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 12:13:33,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97347377] [2020-07-21 12:13:33,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 12:13:33,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:13:33,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 12:13:33,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 12:13:33,446 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-07-21 12:13:33,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:13:33,476 INFO L93 Difference]: Finished difference Result 43 states and 65 transitions. [2020-07-21 12:13:33,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 12:13:33,478 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-21 12:13:33,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:13:33,487 INFO L225 Difference]: With dead ends: 43 [2020-07-21 12:13:33,487 INFO L226 Difference]: Without dead ends: 19 [2020-07-21 12:13:33,491 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 12:13:33,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-21 12:13:33,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-07-21 12:13:33,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-21 12:13:33,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2020-07-21 12:13:33,535 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2020-07-21 12:13:33,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:13:33,536 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2020-07-21 12:13:33,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 12:13:33,536 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2020-07-21 12:13:33,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 12:13:33,537 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:13:33,537 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:13:33,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:13:33,752 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:13:33,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:13:33,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1082567597, now seen corresponding path program 1 times [2020-07-21 12:13:33,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:13:33,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700247685] [2020-07-21 12:13:33,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:13:33,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:13:33,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 12:13:33,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:13:33,858 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 12:13:33,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:13:33,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700247685] [2020-07-21 12:13:33,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:13:33,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 12:13:33,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956216860] [2020-07-21 12:13:33,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 12:13:33,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:13:33,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 12:13:33,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:13:33,863 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 5 states. [2020-07-21 12:13:33,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:13:33,945 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2020-07-21 12:13:33,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 12:13:33,946 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-21 12:13:33,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:13:33,948 INFO L225 Difference]: With dead ends: 33 [2020-07-21 12:13:33,948 INFO L226 Difference]: Without dead ends: 31 [2020-07-21 12:13:33,949 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 12:13:33,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-21 12:13:33,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-07-21 12:13:33,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-21 12:13:33,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2020-07-21 12:13:33,964 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 10 [2020-07-21 12:13:33,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:13:33,964 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2020-07-21 12:13:33,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 12:13:33,965 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2020-07-21 12:13:33,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 12:13:33,965 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:13:33,969 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:13:34,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:13:34,184 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:13:34,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:13:34,185 INFO L82 PathProgramCache]: Analyzing trace with hash 725386554, now seen corresponding path program 1 times [2020-07-21 12:13:34,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:13:34,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221274319] [2020-07-21 12:13:34,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:13:34,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:13:34,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 12:13:34,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:13:34,256 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 12:13:34,257 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:13:34,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221274319] [2020-07-21 12:13:34,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:13:34,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 12:13:34,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910990457] [2020-07-21 12:13:34,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 12:13:34,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:13:34,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 12:13:34,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:13:34,260 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand 5 states. [2020-07-21 12:13:34,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:13:34,332 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2020-07-21 12:13:34,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 12:13:34,333 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-21 12:13:34,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:13:34,334 INFO L225 Difference]: With dead ends: 37 [2020-07-21 12:13:34,334 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 12:13:34,335 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 12:13:34,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 12:13:34,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-07-21 12:13:34,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-21 12:13:34,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2020-07-21 12:13:34,346 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 15 [2020-07-21 12:13:34,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:13:34,347 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2020-07-21 12:13:34,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 12:13:34,347 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2020-07-21 12:13:34,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 12:13:34,348 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:13:34,348 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:13:34,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:13:34,562 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:13:34,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:13:34,563 INFO L82 PathProgramCache]: Analyzing trace with hash -436292723, now seen corresponding path program 1 times [2020-07-21 12:13:34,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:13:34,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858539546] [2020-07-21 12:13:34,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:13:34,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:13:34,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 12:13:34,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:13:34,639 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 12:13:34,639 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:13:34,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858539546] [2020-07-21 12:13:34,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:13:34,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 12:13:34,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930488048] [2020-07-21 12:13:34,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 12:13:34,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:13:34,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 12:13:34,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:13:34,642 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 5 states. [2020-07-21 12:13:34,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:13:34,716 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2020-07-21 12:13:34,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 12:13:34,717 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-07-21 12:13:34,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:13:34,719 INFO L225 Difference]: With dead ends: 41 [2020-07-21 12:13:34,719 INFO L226 Difference]: Without dead ends: 36 [2020-07-21 12:13:34,720 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 12:13:34,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-21 12:13:34,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-21 12:13:34,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 12:13:34,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-07-21 12:13:34,729 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 20 [2020-07-21 12:13:34,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:13:34,730 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-07-21 12:13:34,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 12:13:34,730 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-07-21 12:13:34,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 12:13:34,731 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:13:34,731 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 12:13:34,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:13:34,947 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:13:34,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:13:34,947 INFO L82 PathProgramCache]: Analyzing trace with hash -984989960, now seen corresponding path program 1 times [2020-07-21 12:13:34,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:13:34,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909214530] [2020-07-21 12:13:34,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:13:34,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:13:34,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 12:13:35,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:13:35,059 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 12:13:35,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:13:35,088 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:13:35,146 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 12:13:35,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909214530] [2020-07-21 12:13:35,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-21 12:13:35,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2020-07-21 12:13:35,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519172070] [2020-07-21 12:13:35,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 12:13:35,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:13:35,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 12:13:35,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 12:13:35,148 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 5 states. [2020-07-21 12:13:35,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:13:35,206 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-07-21 12:13:35,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 12:13:35,208 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-07-21 12:13:35,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:13:35,209 INFO L225 Difference]: With dead ends: 42 [2020-07-21 12:13:35,209 INFO L226 Difference]: Without dead ends: 40 [2020-07-21 12:13:35,210 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 12:13:35,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-21 12:13:35,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-07-21 12:13:35,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 12:13:35,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-07-21 12:13:35,218 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 27 [2020-07-21 12:13:35,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:13:35,219 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-07-21 12:13:35,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 12:13:35,219 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-07-21 12:13:35,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-21 12:13:35,220 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:13:35,220 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 12:13:35,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:13:35,422 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:13:35,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:13:35,423 INFO L82 PathProgramCache]: Analyzing trace with hash -2135406385, now seen corresponding path program 2 times [2020-07-21 12:13:35,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:13:35,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212195244] [2020-07-21 12:13:35,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:13:35,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:13:35,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 12:13:35,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:13:35,507 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 12:13:35,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:13:35,527 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:13:35,588 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 12:13:35,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212195244] [2020-07-21 12:13:35,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:13:35,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-21 12:13:35,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229985643] [2020-07-21 12:13:35,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 12:13:35,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:13:35,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 12:13:35,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-21 12:13:35,591 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 8 states. [2020-07-21 12:13:46,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:13:46,051 INFO L93 Difference]: Finished difference Result 74 states and 94 transitions. [2020-07-21 12:13:46,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 12:13:46,052 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-07-21 12:13:46,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:13:46,054 INFO L225 Difference]: With dead ends: 74 [2020-07-21 12:13:46,055 INFO L226 Difference]: Without dead ends: 69 [2020-07-21 12:13:46,055 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 12:13:46,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-21 12:13:46,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2020-07-21 12:13:46,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-21 12:13:46,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2020-07-21 12:13:46,073 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 32 [2020-07-21 12:13:46,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:13:46,073 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2020-07-21 12:13:46,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 12:13:46,073 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2020-07-21 12:13:46,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 12:13:46,075 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:13:46,075 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 12:13:46,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:13:46,276 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:13:46,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:13:46,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1300456723, now seen corresponding path program 3 times [2020-07-21 12:13:46,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:13:46,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941533035] [2020-07-21 12:13:46,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:13:46,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:13:46,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 12:13:46,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:13:46,428 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 12:13:46,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:13:46,463 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:13:46,549 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 12:13:46,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941533035] [2020-07-21 12:13:46,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-21 12:13:46,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2020-07-21 12:13:46,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261892895] [2020-07-21 12:13:46,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 12:13:46,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:13:46,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 12:13:46,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-21 12:13:46,552 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand 5 states. [2020-07-21 12:13:46,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:13:46,673 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2020-07-21 12:13:46,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 12:13:46,675 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-07-21 12:13:46,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:13:46,676 INFO L225 Difference]: With dead ends: 76 [2020-07-21 12:13:46,676 INFO L226 Difference]: Without dead ends: 70 [2020-07-21 12:13:46,677 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 12:13:46,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-21 12:13:46,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-07-21 12:13:46,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-21 12:13:46,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2020-07-21 12:13:46,692 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 54 [2020-07-21 12:13:46,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:13:46,693 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2020-07-21 12:13:46,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 12:13:46,693 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2020-07-21 12:13:46,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-07-21 12:13:46,696 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:13:46,696 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 12:13:46,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:13:46,904 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:13:46,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:13:46,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1996269958, now seen corresponding path program 4 times [2020-07-21 12:13:46,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:13:46,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572735722] [2020-07-21 12:13:46,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:13:46,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:13:46,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-21 12:13:46,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:13:47,162 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 12:13:47,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:13:47,203 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:13:47,486 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 12:13:47,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572735722] [2020-07-21 12:13:47,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:13:47,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-21 12:13:47,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716015992] [2020-07-21 12:13:47,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 12:13:47,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:13:47,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 12:13:47,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-21 12:13:47,489 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand 14 states. [2020-07-21 12:13:53,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:13:53,306 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2020-07-21 12:13:53,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 12:13:53,308 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 83 [2020-07-21 12:13:53,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:13:53,309 INFO L225 Difference]: With dead ends: 81 [2020-07-21 12:13:53,309 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 12:13:53,311 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 12:13:53,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 12:13:53,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 12:13:53,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 12:13:53,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 12:13:53,312 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 83 [2020-07-21 12:13:53,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:13:53,313 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 12:13:53,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 12:13:53,313 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 12:13:53,313 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 12:13:53,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:13:53,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 12:14:05,263 WARN L193 SmtUtils]: Spent 11.41 s on a formula simplification. DAG size of input: 53 DAG size of output: 18 [2020-07-21 12:14:15,918 WARN L193 SmtUtils]: Spent 10.64 s on a formula simplification. DAG size of input: 53 DAG size of output: 18 [2020-07-21 12:14:26,329 WARN L193 SmtUtils]: Spent 10.41 s on a formula simplification. DAG size of input: 35 DAG size of output: 18 [2020-07-21 12:14:38,854 WARN L193 SmtUtils]: Spent 12.52 s on a formula simplification. DAG size of input: 35 DAG size of output: 18 [2020-07-21 12:14:49,592 WARN L193 SmtUtils]: Spent 10.74 s on a formula simplification. DAG size of input: 53 DAG size of output: 18 [2020-07-21 12:14:49,880 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-21 12:15:02,533 WARN L193 SmtUtils]: Spent 12.65 s on a formula simplification. DAG size of input: 53 DAG size of output: 18 [2020-07-21 12:15:02,537 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 12:15:02,537 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 12:15:02,537 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 12:15:02,537 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 12:15:02,537 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 12:15:02,537 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 12:15:02,537 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 6 8) no Hoare annotation was computed. [2020-07-21 12:15:02,538 INFO L268 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-07-21 12:15:02,538 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2020-07-21 12:15:02,538 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2020-07-21 12:15:02,538 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 18 45) the Hoare annotation is: true [2020-07-21 12:15:02,538 INFO L268 CegarLoopResult]: For program point L29(lines 26 38) no Hoare annotation was computed. [2020-07-21 12:15:02,538 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 12:15:02,539 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 12:15:02,539 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 12:15:02,540 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 18 45) no Hoare annotation was computed. [2020-07-21 12:15:02,541 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 12:15:02,541 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 12:15:02,541 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 18 45) no Hoare annotation was computed. [2020-07-21 12:15:02,541 INFO L268 CegarLoopResult]: For program point L42(line 42) no Hoare annotation was computed. [2020-07-21 12:15:02,541 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 12:15:02,542 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 12:15:02,542 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2020-07-21 12:15:02,542 INFO L268 CegarLoopResult]: For program point L11(lines 11 12) no Hoare annotation was computed. [2020-07-21 12:15:02,542 INFO L268 CegarLoopResult]: For program point L10(lines 10 13) no Hoare annotation was computed. [2020-07-21 12:15:02,542 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2020-07-21 12:15:02,542 INFO L268 CegarLoopResult]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2020-07-21 12:15:02,543 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-07-21 12:15:02,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 12:15:02 BoogieIcfgContainer [2020-07-21 12:15:02,556 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 12:15:02,558 INFO L168 Benchmark]: Toolchain (without parser) took 89923.54 ms. Allocated memory was 148.9 MB in the beginning and 244.8 MB in the end (delta: 95.9 MB). Free memory was 106.6 MB in the beginning and 163.7 MB in the end (delta: -57.0 MB). Peak memory consumption was 38.9 MB. Max. memory is 7.1 GB. [2020-07-21 12:15:02,559 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 148.9 MB. Free memory was 125.0 MB in the beginning and 124.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-21 12:15:02,559 INFO L168 Benchmark]: CACSL2BoogieTranslator took 225.67 ms. Allocated memory is still 148.9 MB. Free memory was 106.2 MB in the beginning and 96.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-21 12:15:02,560 INFO L168 Benchmark]: Boogie Preprocessor took 30.97 ms. Allocated memory is still 148.9 MB. Free memory was 96.6 MB in the beginning and 95.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-21 12:15:02,561 INFO L168 Benchmark]: RCFGBuilder took 337.69 ms. Allocated memory was 148.9 MB in the beginning and 205.0 MB in the end (delta: 56.1 MB). Free memory was 95.0 MB in the beginning and 171.8 MB in the end (delta: -76.8 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-21 12:15:02,562 INFO L168 Benchmark]: TraceAbstraction took 89323.63 ms. Allocated memory was 205.0 MB in the beginning and 244.8 MB in the end (delta: 39.8 MB). Free memory was 171.8 MB in the beginning and 163.7 MB in the end (delta: 8.1 MB). Peak memory consumption was 48.0 MB. Max. memory is 7.1 GB. [2020-07-21 12:15:02,566 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 148.9 MB. Free memory was 125.0 MB in the beginning and 124.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 225.67 ms. Allocated memory is still 148.9 MB. Free memory was 106.2 MB in the beginning and 96.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.97 ms. Allocated memory is still 148.9 MB. Free memory was 96.6 MB in the beginning and 95.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 337.69 ms. Allocated memory was 148.9 MB in the beginning and 205.0 MB in the end (delta: 56.1 MB). Free memory was 95.0 MB in the beginning and 171.8 MB in the end (delta: -76.8 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 89323.63 ms. Allocated memory was 205.0 MB in the beginning and 244.8 MB in the end (delta: 39.8 MB). Free memory was 171.8 MB in the beginning and 163.7 MB in the end (delta: 8.1 MB). Peak memory consumption was 48.0 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: 20.2s, OverallIterations: 8, TraceHistogramMax: 14, AutomataDifference: 16.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 69.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 204 SDtfs, 56 SDslu, 568 SDs, 0 SdLazy, 433 SolverSat, 83 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 15.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 451 GetRequests, 392 SyntacticMatches, 10 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=7, 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, 8 MinimizatonAttempts, 6 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 49 PreInvPairs, 87 NumberOfFragments, 213 HoareAnnotationTreeSize, 49 FomulaSimplifications, 207 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 12 FomulaSimplificationsInter, 1064 FormulaSimplificationTreeSizeReductionInter, 68.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 251 NumberOfCodeBlocks, 251 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 435 ConstructedInterpolants, 0 QuantifiedInterpolants, 88480 SizeOfPredicates, 16 NumberOfNonLiveVariables, 583 ConjunctsInSsa, 96 ConjunctsInUnsatCore, 12 InterpolantComputations, 6 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...