/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/loops-crafted-1/sumt9.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 12:17:49,363 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 12:17:49,367 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 12:17:49,389 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 12:17:49,389 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 12:17:49,391 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 12:17:49,394 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 12:17:49,404 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 12:17:49,406 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 12:17:49,410 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 12:17:49,415 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 12:17:49,416 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 12:17:49,416 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 12:17:49,418 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 12:17:49,419 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 12:17:49,420 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 12:17:49,420 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 12:17:49,421 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 12:17:49,423 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 12:17:49,425 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 12:17:49,430 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 12:17:49,431 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 12:17:49,432 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 12:17:49,433 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 12:17:49,436 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 12:17:49,444 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 12:17:49,445 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 12:17:49,446 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 12:17:49,447 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 [2020-07-20 12:17:49,462 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 12:17:49,463 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 12:17:49,464 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 12:17:49,464 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 12:17:49,465 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 12:17:49,465 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 12:17:49,465 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 12:17:49,465 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 12:17:49,466 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 12:17:49,466 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 12:17:49,466 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 12:17:49,466 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 12:17:49,466 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 12:17:49,467 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 12:17:49,467 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 12:17:49,467 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 12:17:49,467 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 12:17:49,468 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 12:17:49,468 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 12:17:49,468 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 12:17:49,468 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 12:17:49,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 12:17:49,469 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 12:17:49,469 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 12:17:49,469 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 12:17:49,469 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 12:17:49,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:17:49,470 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 12:17:49,470 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 12:17:49,470 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 [2020-07-20 12:17:49,782 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 12:17:49,797 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 12:17:49,801 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 12:17:49,802 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 12:17:49,803 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 12:17:49,804 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt9.c [2020-07-20 12:17:49,890 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e408035b/bd51e2ce9ae84344a5492d69d25a946f/FLAGefee49cec [2020-07-20 12:17:50,401 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 12:17:50,402 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt9.c [2020-07-20 12:17:50,409 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e408035b/bd51e2ce9ae84344a5492d69d25a946f/FLAGefee49cec [2020-07-20 12:17:50,719 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e408035b/bd51e2ce9ae84344a5492d69d25a946f [2020-07-20 12:17:50,728 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 12:17:50,731 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 12:17:50,735 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 12:17:50,736 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 12:17:50,740 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 12:17:50,741 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:17:50" (1/1) ... [2020-07-20 12:17:50,744 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44de9f16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:17:50, skipping insertion in model container [2020-07-20 12:17:50,745 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:17:50" (1/1) ... [2020-07-20 12:17:50,755 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 12:17:50,780 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 12:17:51,062 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 12:17:51,066 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 12:17:51,087 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 12:17:51,102 INFO L208 MainTranslator]: Completed translation [2020-07-20 12:17:51,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:17:51 WrapperNode [2020-07-20 12:17:51,103 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 12:17:51,103 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 12:17:51,103 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 12:17:51,104 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 12:17:51,215 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:17:51" (1/1) ... [2020-07-20 12:17:51,218 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:17:51" (1/1) ... [2020-07-20 12:17:51,236 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:17:51" (1/1) ... [2020-07-20 12:17:51,237 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:17:51" (1/1) ... [2020-07-20 12:17:51,242 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:17:51" (1/1) ... [2020-07-20 12:17:51,249 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:17:51" (1/1) ... [2020-07-20 12:17:51,250 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:17:51" (1/1) ... [2020-07-20 12:17:51,253 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 12:17:51,254 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 12:17:51,254 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 12:17:51,254 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 12:17:51,255 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:17:51" (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 [2020-07-20 12:17:51,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 12:17:51,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 12:17:51,327 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 12:17:51,327 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 12:17:51,327 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 12:17:51,327 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 12:17:51,327 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 12:17:51,327 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 12:17:51,327 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 12:17:51,328 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 12:17:51,328 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 12:17:51,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 12:17:51,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 12:17:51,638 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 12:17:51,638 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 12:17:51,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:17:51 BoogieIcfgContainer [2020-07-20 12:17:51,644 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 12:17:51,646 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 12:17:51,647 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 12:17:51,651 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 12:17:51,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 12:17:50" (1/3) ... [2020-07-20 12:17:51,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fd9915c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:17:51, skipping insertion in model container [2020-07-20 12:17:51,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:17:51" (2/3) ... [2020-07-20 12:17:51,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fd9915c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:17:51, skipping insertion in model container [2020-07-20 12:17:51,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:17:51" (3/3) ... [2020-07-20 12:17:51,656 INFO L109 eAbstractionObserver]: Analyzing ICFG sumt9.c [2020-07-20 12:17:51,668 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 12:17:51,677 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 12:17:51,696 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 12:17:51,724 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 12:17:51,724 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 12:17:51,724 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 12:17:51,724 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 12:17:51,725 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 12:17:51,725 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 12:17:51,725 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 12:17:51,725 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 12:17:51,747 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-07-20 12:17:51,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 12:17:51,754 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:17:51,755 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:17:51,756 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:17:51,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:17:51,764 INFO L82 PathProgramCache]: Analyzing trace with hash -684006215, now seen corresponding path program 1 times [2020-07-20 12:17:51,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:17:51,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852962323] [2020-07-20 12:17:51,776 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 [2020-07-20 12:17:51,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:17:51,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-20 12:17:51,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:17:52,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:17:52,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:17:52,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852962323] [2020-07-20 12:17:52,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:17:52,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 12:17:52,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311127990] [2020-07-20 12:17:52,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 12:17:52,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:17:52,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 12:17:52,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 12:17:52,138 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 7 states. [2020-07-20 12:17:52,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:17:52,459 INFO L93 Difference]: Finished difference Result 74 states and 111 transitions. [2020-07-20 12:17:52,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 12:17:52,461 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-07-20 12:17:52,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:17:52,472 INFO L225 Difference]: With dead ends: 74 [2020-07-20 12:17:52,472 INFO L226 Difference]: Without dead ends: 41 [2020-07-20 12:17:52,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-20 12:17:52,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-20 12:17:52,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-07-20 12:17:52,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 12:17:52,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2020-07-20 12:17:52,526 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 14 [2020-07-20 12:17:52,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:17:52,527 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2020-07-20 12:17:52,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 12:17:52,527 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2020-07-20 12:17:52,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 12:17:52,529 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:17:52,529 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:17:52,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:17:52,746 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:17:52,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:17:52,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1563298987, now seen corresponding path program 1 times [2020-07-20 12:17:52,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:17:52,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694437685] [2020-07-20 12:17:52,749 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 [2020-07-20 12:17:52,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:17:52,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 31 conjunts are in the unsatisfiable core [2020-07-20 12:17:52,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:17:53,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:17:53,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:17:53,091 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:17:53,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 12:17:53,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694437685] [2020-07-20 12:17:53,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 12:17:53,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2020-07-20 12:17:53,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348501322] [2020-07-20 12:17:53,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 12:17:53,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:17:53,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 12:17:53,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-07-20 12:17:53,322 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 6 states. [2020-07-20 12:18:26,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:18:26,569 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2020-07-20 12:18:26,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 12:18:26,646 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-07-20 12:18:26,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:18:26,648 INFO L225 Difference]: With dead ends: 58 [2020-07-20 12:18:26,649 INFO L226 Difference]: Without dead ends: 56 [2020-07-20 12:18:26,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-07-20 12:18:26,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-20 12:18:26,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-07-20 12:18:26,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 12:18:26,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2020-07-20 12:18:26,663 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 29 [2020-07-20 12:18:26,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:18:26,663 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2020-07-20 12:18:26,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 12:18:26,663 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2020-07-20 12:18:26,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 12:18:26,665 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:18:26,665 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:18:26,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:18:26,879 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:18:26,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:18:26,880 INFO L82 PathProgramCache]: Analyzing trace with hash -908789750, now seen corresponding path program 1 times [2020-07-20 12:18:26,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:18:26,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039416229] [2020-07-20 12:18:26,882 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 [2020-07-20 12:18:26,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:18:26,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 12:18:26,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:18:26,963 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 12:18:26,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:18:27,054 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 12:18:27,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039416229] [2020-07-20 12:18:27,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:18:27,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-20 12:18:27,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598795470] [2020-07-20 12:18:27,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 12:18:27,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:18:27,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 12:18:27,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-07-20 12:18:27,057 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand 8 states. [2020-07-20 12:18:35,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:18:35,936 INFO L93 Difference]: Finished difference Result 123 states and 179 transitions. [2020-07-20 12:18:35,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 12:18:35,937 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-07-20 12:18:35,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:18:35,941 INFO L225 Difference]: With dead ends: 123 [2020-07-20 12:18:35,941 INFO L226 Difference]: Without dead ends: 91 [2020-07-20 12:18:35,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-07-20 12:18:35,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-07-20 12:18:35,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2020-07-20 12:18:35,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-07-20 12:18:35,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 117 transitions. [2020-07-20 12:18:35,968 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 117 transitions. Word has length 38 [2020-07-20 12:18:35,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:18:35,969 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 117 transitions. [2020-07-20 12:18:35,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 12:18:35,969 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 117 transitions. [2020-07-20 12:18:35,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-20 12:18:35,972 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:18:35,972 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:18:36,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:18:36,173 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:18:36,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:18:36,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1143083323, now seen corresponding path program 1 times [2020-07-20 12:18:36,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:18:36,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497203212] [2020-07-20 12:18:36,176 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 [2020-07-20 12:18:36,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:18:36,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-20 12:18:36,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:18:36,493 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 12:18:36,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:18:36,521 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:18:56,594 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 16 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 12:18:56,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497203212] [2020-07-20 12:18:56,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:18:56,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2020-07-20 12:18:56,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051229161] [2020-07-20 12:18:56,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 12:18:56,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:18:56,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 12:18:56,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=185, Unknown=6, NotChecked=0, Total=240 [2020-07-20 12:18:56,596 INFO L87 Difference]: Start difference. First operand 88 states and 117 transitions. Second operand 16 states. [2020-07-20 12:20:51,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:20:51,076 INFO L93 Difference]: Finished difference Result 189 states and 280 transitions. [2020-07-20 12:20:51,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 12:20:51,077 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2020-07-20 12:20:51,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:20:51,080 INFO L225 Difference]: With dead ends: 189 [2020-07-20 12:20:51,080 INFO L226 Difference]: Without dead ends: 150 [2020-07-20 12:20:51,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 69 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=53, Invalid=213, Unknown=6, NotChecked=0, Total=272 [2020-07-20 12:20:51,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-07-20 12:20:51,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2020-07-20 12:20:51,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-07-20 12:20:51,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 212 transitions. [2020-07-20 12:20:51,119 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 212 transitions. Word has length 44 [2020-07-20 12:20:51,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:20:51,119 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 212 transitions. [2020-07-20 12:20:51,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 12:20:51,119 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 212 transitions. [2020-07-20 12:20:51,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-07-20 12:20:51,122 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:20:51,122 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:20:51,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:20:51,328 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:20:51,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:20:51,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1868892788, now seen corresponding path program 1 times [2020-07-20 12:20:51,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:20:51,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778885755] [2020-07-20 12:20:51,330 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 [2020-07-20 12:20:51,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:20:51,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2020-07-20 12:20:51,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:20:51,840 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 8 proven. 71 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-07-20 12:20:51,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:20:51,881 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:21:01,403 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 8 proven. 0 refuted. 28 times theorem prover too weak. 67 trivial. 0 not checked. [2020-07-20 12:21:01,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1778885755] [2020-07-20 12:21:01,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:21:01,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 19 [2020-07-20 12:21:01,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441813209] [2020-07-20 12:21:01,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 12:21:01,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:21:01,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 12:21:01,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=281, Unknown=4, NotChecked=0, Total=342 [2020-07-20 12:21:01,409 INFO L87 Difference]: Start difference. First operand 150 states and 212 transitions. Second operand 19 states. [2020-07-20 12:22:04,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:22:04,367 INFO L93 Difference]: Finished difference Result 241 states and 353 transitions. [2020-07-20 12:22:04,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 12:22:04,368 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 70 [2020-07-20 12:22:04,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:22:04,373 INFO L225 Difference]: With dead ends: 241 [2020-07-20 12:22:04,373 INFO L226 Difference]: Without dead ends: 140 [2020-07-20 12:22:04,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 113 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=61, Invalid=315, Unknown=4, NotChecked=0, Total=380 [2020-07-20 12:22:04,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-07-20 12:22:04,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2020-07-20 12:22:04,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-07-20 12:22:04,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 185 transitions. [2020-07-20 12:22:04,394 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 185 transitions. Word has length 70 [2020-07-20 12:22:04,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:22:04,404 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 185 transitions. [2020-07-20 12:22:04,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 12:22:04,405 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 185 transitions. [2020-07-20 12:22:04,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-07-20 12:22:04,407 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:22:04,408 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:22:04,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:22:04,616 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:22:04,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:22:04,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1768902726, now seen corresponding path program 1 times [2020-07-20 12:22:04,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:22:04,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675663045] [2020-07-20 12:22:04,618 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 [2020-07-20 12:22:04,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:22:04,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 47 conjunts are in the unsatisfiable core [2020-07-20 12:22:04,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:22:05,229 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 10 proven. 102 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-20 12:22:05,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:22:05,281 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:23:02,682 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 14 proven. 0 refuted. 85 times theorem prover too weak. 53 trivial. 0 not checked. [2020-07-20 12:23:02,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675663045] [2020-07-20 12:23:02,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:23:02,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 25 [2020-07-20 12:23:02,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540141770] [2020-07-20 12:23:02,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 12:23:02,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:23:02,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 12:23:02,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=477, Unknown=21, NotChecked=0, Total=600 [2020-07-20 12:23:02,685 INFO L87 Difference]: Start difference. First operand 140 states and 185 transitions. Second operand 25 states. [2020-07-20 12:24:40,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:24:40,566 INFO L93 Difference]: Finished difference Result 312 states and 455 transitions. [2020-07-20 12:24:40,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 12:24:40,570 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 81 [2020-07-20 12:24:40,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:24:40,573 INFO L225 Difference]: With dead ends: 312 [2020-07-20 12:24:40,573 INFO L226 Difference]: Without dead ends: 234 [2020-07-20 12:24:40,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 131 SyntacticMatches, 13 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 78.1s TimeCoverageRelationStatistics Valid=106, Invalid=523, Unknown=21, NotChecked=0, Total=650 [2020-07-20 12:24:40,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-07-20 12:24:40,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 224. [2020-07-20 12:24:40,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-07-20 12:24:40,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 314 transitions. [2020-07-20 12:24:40,600 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 314 transitions. Word has length 81 [2020-07-20 12:24:40,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:24:40,601 INFO L479 AbstractCegarLoop]: Abstraction has 224 states and 314 transitions. [2020-07-20 12:24:40,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 12:24:40,601 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 314 transitions. [2020-07-20 12:24:40,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-07-20 12:24:40,603 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:24:40,603 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:24:40,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:24:40,817 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:24:40,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:24:40,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1342259365, now seen corresponding path program 1 times [2020-07-20 12:24:40,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:24:40,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690600663] [2020-07-20 12:24:40,819 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 [2020-07-20 12:24:40,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:24:40,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 51 conjunts are in the unsatisfiable core [2020-07-20 12:24:40,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:24:41,616 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 12 proven. 149 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-07-20 12:24:41,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:24:41,675 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:24:43,234 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2020-07-20 12:24:43,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690600663] [2020-07-20 12:24:43,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 12:24:43,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [19] total 21 [2020-07-20 12:24:43,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913374362] [2020-07-20 12:24:43,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 12:24:43,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:24:43,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 12:24:43,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2020-07-20 12:24:43,237 INFO L87 Difference]: Start difference. First operand 224 states and 314 transitions. Second operand 6 states. [2020-07-20 12:25:00,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:25:00,017 INFO L93 Difference]: Finished difference Result 266 states and 376 transitions. [2020-07-20 12:25:00,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 12:25:00,018 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-07-20 12:25:00,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:25:00,021 INFO L225 Difference]: With dead ends: 266 [2020-07-20 12:25:00,022 INFO L226 Difference]: Without dead ends: 264 [2020-07-20 12:25:00,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 153 SyntacticMatches, 15 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2020-07-20 12:25:00,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-07-20 12:25:00,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2020-07-20 12:25:00,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-07-20 12:25:00,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 374 transitions. [2020-07-20 12:25:00,044 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 374 transitions. Word has length 94 [2020-07-20 12:25:00,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:25:00,044 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 374 transitions. [2020-07-20 12:25:00,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 12:25:00,045 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 374 transitions. [2020-07-20 12:25:00,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-07-20 12:25:00,048 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:25:00,048 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 6, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:25:00,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:25:00,262 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:25:00,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:25:00,262 INFO L82 PathProgramCache]: Analyzing trace with hash 14050252, now seen corresponding path program 1 times [2020-07-20 12:25:00,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:25:00,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471681212] [2020-07-20 12:25:00,263 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 [2020-07-20 12:25:00,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:25:00,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 12:25:00,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:25:00,400 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 28 proven. 164 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-20 12:25:00,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:25:00,647 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 28 proven. 164 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-20 12:25:00,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471681212] [2020-07-20 12:25:00,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:25:00,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-07-20 12:25:00,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14870066] [2020-07-20 12:25:00,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 12:25:00,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:25:00,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 12:25:00,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-07-20 12:25:00,650 INFO L87 Difference]: Start difference. First operand 264 states and 374 transitions. Second operand 18 states. [2020-07-20 12:25:03,282 WARN L193 SmtUtils]: Spent 2.16 s on a formula simplification that was a NOOP. DAG size: 32 [2020-07-20 12:25:03,510 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 12:25:15,881 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 12:25:22,359 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 12:25:31,620 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 12:25:53,327 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 12:26:06,611 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 12:26:18,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:26:18,979 INFO L93 Difference]: Finished difference Result 2436 states and 4085 transitions. [2020-07-20 12:26:18,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 264 states. [2020-07-20 12:26:18,981 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 102 [2020-07-20 12:26:18,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:26:18,998 INFO L225 Difference]: With dead ends: 2436 [2020-07-20 12:26:18,998 INFO L226 Difference]: Without dead ends: 2242 [2020-07-20 12:26:19,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30021 ImplicationChecksByTransitivity, 24.6s TimeCoverageRelationStatistics Valid=7337, Invalid=62095, Unknown=0, NotChecked=0, Total=69432 [2020-07-20 12:26:19,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2020-07-20 12:26:19,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 2023. [2020-07-20 12:26:19,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2023 states. [2020-07-20 12:26:19,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 3218 transitions. [2020-07-20 12:26:19,169 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 3218 transitions. Word has length 102 [2020-07-20 12:26:19,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:26:19,170 INFO L479 AbstractCegarLoop]: Abstraction has 2023 states and 3218 transitions. [2020-07-20 12:26:19,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 12:26:19,170 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 3218 transitions. [2020-07-20 12:26:19,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-07-20 12:26:19,183 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:26:19,183 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:26:19,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:26:19,384 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:26:19,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:26:19,385 INFO L82 PathProgramCache]: Analyzing trace with hash 406834607, now seen corresponding path program 1 times [2020-07-20 12:26:19,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:26:19,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [763314601] [2020-07-20 12:26:19,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:26:19,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:26:19,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 55 conjunts are in the unsatisfiable core [2020-07-20 12:26:19,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:26:20,464 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 14 proven. 189 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-20 12:26:20,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:26:20,553 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:26:51,837 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 67 proven. 0 refuted. 72 times theorem prover too weak. 148 trivial. 0 not checked. [2020-07-20 12:26:51,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [763314601] [2020-07-20 12:26:51,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:26:51,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10] total 27 [2020-07-20 12:26:51,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081220165] [2020-07-20 12:26:51,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-20 12:26:51,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:26:51,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-20 12:26:51,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=588, Unknown=10, NotChecked=0, Total=702 [2020-07-20 12:26:51,840 INFO L87 Difference]: Start difference. First operand 2023 states and 3218 transitions. Second operand 27 states. [2020-07-20 12:28:08,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:28:08,409 INFO L93 Difference]: Finished difference Result 6017 states and 9601 transitions. [2020-07-20 12:28:08,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-20 12:28:08,411 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 104 [2020-07-20 12:28:08,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:28:08,438 INFO L225 Difference]: With dead ends: 6017 [2020-07-20 12:28:08,438 INFO L226 Difference]: Without dead ends: 4085 [2020-07-20 12:28:08,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 169 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 36.7s TimeCoverageRelationStatistics Valid=108, Invalid=638, Unknown=10, NotChecked=0, Total=756 [2020-07-20 12:28:08,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4085 states. [2020-07-20 12:28:08,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4085 to 3957. [2020-07-20 12:28:08,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3957 states. [2020-07-20 12:28:08,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3957 states to 3957 states and 6346 transitions. [2020-07-20 12:28:08,644 INFO L78 Accepts]: Start accepts. Automaton has 3957 states and 6346 transitions. Word has length 104 [2020-07-20 12:28:08,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:28:08,646 INFO L479 AbstractCegarLoop]: Abstraction has 3957 states and 6346 transitions. [2020-07-20 12:28:08,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-20 12:28:08,646 INFO L276 IsEmpty]: Start isEmpty. Operand 3957 states and 6346 transitions. [2020-07-20 12:28:08,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-07-20 12:28:08,650 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:28:08,650 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 10, 8, 7, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:28:08,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:28:08,865 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:28:08,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:28:08,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1683990473, now seen corresponding path program 1 times [2020-07-20 12:28:08,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:28:08,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1515538195] [2020-07-20 12:28:08,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:28:08,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:28:08,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 75 conjunts are in the unsatisfiable core [2020-07-20 12:28:08,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:28:10,566 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 24 proven. 440 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-07-20 12:28:10,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:28:10,705 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:28:35,756 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 24 proven. 0 refuted. 135 times theorem prover too weak. 569 trivial. 0 not checked. [2020-07-20 12:28:35,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1515538195] [2020-07-20 12:28:35,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:28:35,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 9] total 36 [2020-07-20 12:28:35,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964444655] [2020-07-20 12:28:35,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-20 12:28:35,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:28:35,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-20 12:28:35,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1115, Unknown=8, NotChecked=0, Total=1260 [2020-07-20 12:28:35,759 INFO L87 Difference]: Start difference. First operand 3957 states and 6346 transitions. Second operand 36 states. [2020-07-20 12:28:56,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:28:56,561 INFO L93 Difference]: Finished difference Result 7828 states and 12611 transitions. [2020-07-20 12:28:56,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-20 12:28:56,562 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 153 [2020-07-20 12:28:56,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:28:56,563 INFO L225 Difference]: With dead ends: 7828 [2020-07-20 12:28:56,563 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 12:28:56,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 247 SyntacticMatches, 27 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 31.4s TimeCoverageRelationStatistics Valid=141, Invalid=1183, Unknown=8, NotChecked=0, Total=1332 [2020-07-20 12:28:56,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 12:28:56,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 12:28:56,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 12:28:56,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 12:28:56,587 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 153 [2020-07-20 12:28:56,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:28:56,587 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 12:28:56,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-20 12:28:56,587 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 12:28:56,588 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 12:28:56,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:28:56,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 12:28:57,677 WARN L193 SmtUtils]: Spent 828.00 ms on a formula simplification. DAG size of input: 632 DAG size of output: 123 [2020-07-20 12:28:58,098 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 637 DAG size of output: 128 [2020-07-20 12:28:58,966 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 16 [2020-07-20 12:28:59,209 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 16 [2020-07-20 12:28:59,236 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-20 12:28:59,236 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-20 12:28:59,236 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 12:28:59,236 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 12:28:59,236 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 12:28:59,237 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 12:28:59,237 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 12:28:59,237 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-20 12:28:59,237 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-20 12:28:59,237 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-20 12:28:59,237 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-20 12:28:59,237 INFO L268 CegarLoopResult]: For program point L35-2(lines 21 38) no Hoare annotation was computed. [2020-07-20 12:28:59,237 INFO L268 CegarLoopResult]: For program point L31(lines 31 38) no Hoare annotation was computed. [2020-07-20 12:28:59,238 INFO L268 CegarLoopResult]: For program point L27(lines 27 38) no Hoare annotation was computed. [2020-07-20 12:28:59,238 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 14 43) no Hoare annotation was computed. [2020-07-20 12:28:59,238 INFO L268 CegarLoopResult]: For program point L23(lines 23 38) no Hoare annotation was computed. [2020-07-20 12:28:59,238 INFO L268 CegarLoopResult]: For program point L19-2(lines 19 41) no Hoare annotation was computed. [2020-07-20 12:28:59,238 INFO L264 CegarLoopResult]: At program point L40(line 40) the Hoare annotation is: (= (mod main_~l~0 4294967296) (mod (+ main_~i~0 main_~j~0 main_~k~0 main_~v1~0 main_~v2~0 main_~v3~0 main_~v4~0 main_~v5~0 main_~v6~0) 4294967296)) [2020-07-20 12:28:59,238 INFO L264 CegarLoopResult]: At program point L40-1(lines 19 41) the Hoare annotation is: (= (mod (+ main_~i~0 main_~j~0 main_~k~0 main_~v1~0 main_~v2~0 main_~v3~0 main_~v4~0 main_~v5~0 main_~v6~0) 4294967296) (mod main_~l~0 4294967296)) [2020-07-20 12:28:59,238 INFO L268 CegarLoopResult]: For program point L33(lines 33 38) no Hoare annotation was computed. [2020-07-20 12:28:59,239 INFO L268 CegarLoopResult]: For program point L29(lines 29 38) no Hoare annotation was computed. [2020-07-20 12:28:59,239 INFO L268 CegarLoopResult]: For program point L25(lines 25 38) no Hoare annotation was computed. [2020-07-20 12:28:59,239 INFO L268 CegarLoopResult]: For program point L21(lines 21 38) no Hoare annotation was computed. [2020-07-20 12:28:59,239 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 14 43) no Hoare annotation was computed. [2020-07-20 12:28:59,239 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 14 43) the Hoare annotation is: true [2020-07-20 12:28:59,239 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-07-20 12:28:59,239 INFO L268 CegarLoopResult]: For program point L35(lines 35 38) no Hoare annotation was computed. [2020-07-20 12:28:59,239 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-20 12:28:59,240 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-20 12:28:59,240 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-20 12:28:59,240 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-20 12:28:59,240 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-20 12:28:59,240 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-20 12:28:59,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 12:28:59 BoogieIcfgContainer [2020-07-20 12:28:59,264 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 12:28:59,269 INFO L168 Benchmark]: Toolchain (without parser) took 668535.82 ms. Allocated memory was 145.2 MB in the beginning and 290.5 MB in the end (delta: 145.2 MB). Free memory was 101.7 MB in the beginning and 193.4 MB in the end (delta: -91.7 MB). Peak memory consumption was 165.2 MB. Max. memory is 7.1 GB. [2020-07-20 12:28:59,270 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 145.2 MB. Free memory is still 119.7 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 12:28:59,270 INFO L168 Benchmark]: CACSL2BoogieTranslator took 367.60 ms. Allocated memory is still 145.2 MB. Free memory was 101.2 MB in the beginning and 91.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-20 12:28:59,271 INFO L168 Benchmark]: Boogie Preprocessor took 149.79 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 91.2 MB in the beginning and 179.8 MB in the end (delta: -88.6 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-20 12:28:59,271 INFO L168 Benchmark]: RCFGBuilder took 391.10 ms. Allocated memory is still 202.4 MB. Free memory was 179.8 MB in the beginning and 163.3 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. [2020-07-20 12:28:59,273 INFO L168 Benchmark]: TraceAbstraction took 667617.60 ms. Allocated memory was 202.4 MB in the beginning and 290.5 MB in the end (delta: 88.1 MB). Free memory was 163.3 MB in the beginning and 193.4 MB in the end (delta: -30.0 MB). Peak memory consumption was 169.7 MB. Max. memory is 7.1 GB. [2020-07-20 12:28:59,276 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 145.2 MB. Free memory is still 119.7 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 367.60 ms. Allocated memory is still 145.2 MB. Free memory was 101.2 MB in the beginning and 91.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 149.79 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 91.2 MB in the beginning and 179.8 MB in the end (delta: -88.6 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 391.10 ms. Allocated memory is still 202.4 MB. Free memory was 179.8 MB in the beginning and 163.3 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 667617.60 ms. Allocated memory was 202.4 MB in the beginning and 290.5 MB in the end (delta: 88.1 MB). Free memory was 163.3 MB in the beginning and 193.4 MB in the end (delta: -30.0 MB). Peak memory consumption was 169.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: (i + j + k + v1 + v2 + v3 + v4 + v5 + v6) % 4294967296 == l % 4294967296 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 665.0s, OverallIterations: 10, TraceHistogramMax: 13, AutomataDifference: 510.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 441 SDtfs, 1088 SDslu, 1209 SDs, 0 SdLazy, 7617 SolverSat, 417 SolverUnsat, 206 SolverUnknown, 0 SolverNotchecked, 438.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1708 GetRequests, 1189 SyntacticMatches, 93 SemanticMatches, 426 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30262 ImplicationChecksByTransitivity, 204.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3957occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 10 MinimizatonAttempts, 360 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 1358 PreInvPairs, 2399 NumberOfFragments, 37 HoareAnnotationTreeSize, 1358 FomulaSimplifications, 52898 FormulaSimplificationTreeSizeReduction, 1.9s HoareSimplificationTime, 7 FomulaSimplificationsInter, 1603 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 151.0s InterpolantComputationTime, 729 NumberOfCodeBlocks, 729 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 1425 ConstructedInterpolants, 0 QuantifiedInterpolants, 1855812 SizeOfPredicates, 18 NumberOfNonLiveVariables, 1497 ConjunctsInSsa, 388 ConjunctsInUnsatCore, 19 InterpolantComputations, 3 PerfectInterpolantSequences, 1986/3642 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...