/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/cggmp2005b.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 22:30:18,204 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 22:30:18,207 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 22:30:18,225 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 22:30:18,226 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 22:30:18,227 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 22:30:18,229 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 22:30:18,242 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 22:30:18,243 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 22:30:18,245 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 22:30:18,245 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 22:30:18,247 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 22:30:18,247 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 22:30:18,248 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 22:30:18,249 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 22:30:18,250 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 22:30:18,251 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 22:30:18,252 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 22:30:18,254 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 22:30:18,256 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 22:30:18,257 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 22:30:18,258 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 22:30:18,259 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 22:30:18,260 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 22:30:18,262 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 22:30:18,263 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 22:30:18,263 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 22:30:18,264 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 22:30:18,264 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 22:30:18,265 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 22:30:18,265 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 22:30:18,266 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 22:30:18,267 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 22:30:18,268 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 22:30:18,269 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 22:30:18,269 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 22:30:18,270 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 22:30:18,270 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 22:30:18,270 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 22:30:18,271 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 22:30:18,272 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 22:30:18,273 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 22:30:18,287 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 22:30:18,287 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 22:30:18,289 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 22:30:18,289 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 22:30:18,289 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 22:30:18,289 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 22:30:18,290 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 22:30:18,290 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 22:30:18,290 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 22:30:18,290 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 22:30:18,290 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 22:30:18,291 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 22:30:18,291 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 22:30:18,291 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 22:30:18,291 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 22:30:18,291 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 22:30:18,292 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 22:30:18,292 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 22:30:18,292 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 22:30:18,292 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 22:30:18,292 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 22:30:18,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:30:18,293 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 22:30:18,293 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 22:30:18,293 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 22:30:18,293 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 22:30:18,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:30:18,294 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 22:30:18,294 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 22:30:18,294 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 22:30:18,596 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 22:30:18,610 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 22:30:18,613 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 22:30:18,615 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 22:30:18,615 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 22:30:18,616 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005b.i [2020-07-20 22:30:18,699 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f23c00f1b/2846608ee3ef46e8969f4287fc9999b6/FLAGf6eedd516 [2020-07-20 22:30:19,173 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 22:30:19,176 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/cggmp2005b.i [2020-07-20 22:30:19,185 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f23c00f1b/2846608ee3ef46e8969f4287fc9999b6/FLAGf6eedd516 [2020-07-20 22:30:19,548 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f23c00f1b/2846608ee3ef46e8969f4287fc9999b6 [2020-07-20 22:30:19,556 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 22:30:19,558 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 22:30:19,559 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 22:30:19,559 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 22:30:19,562 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 22:30:19,563 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:30:19" (1/1) ... [2020-07-20 22:30:19,566 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47f717b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:30:19, skipping insertion in model container [2020-07-20 22:30:19,566 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:30:19" (1/1) ... [2020-07-20 22:30:19,573 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 22:30:19,589 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 22:30:19,745 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:30:19,750 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 22:30:19,767 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:30:19,782 INFO L208 MainTranslator]: Completed translation [2020-07-20 22:30:19,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:30:19 WrapperNode [2020-07-20 22:30:19,783 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 22:30:19,783 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 22:30:19,783 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 22:30:19,784 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 22:30:19,797 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:30:19" (1/1) ... [2020-07-20 22:30:19,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:30:19" (1/1) ... [2020-07-20 22:30:19,802 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:30:19" (1/1) ... [2020-07-20 22:30:19,803 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:30:19" (1/1) ... [2020-07-20 22:30:19,806 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:30:19" (1/1) ... [2020-07-20 22:30:19,812 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:30:19" (1/1) ... [2020-07-20 22:30:19,813 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:30:19" (1/1) ... [2020-07-20 22:30:19,896 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 22:30:19,896 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 22:30:19,896 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 22:30:19,897 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 22:30:19,903 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:30:19" (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 22:30:19,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 22:30:19,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 22:30:19,975 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 22:30:19,975 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 22:30:19,975 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 22:30:19,976 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 22:30:19,976 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 22:30:19,976 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 22:30:19,976 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 22:30:19,976 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 22:30:19,976 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 22:30:19,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 22:30:19,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 22:30:20,172 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 22:30:20,173 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 22:30:20,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:30:20 BoogieIcfgContainer [2020-07-20 22:30:20,177 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 22:30:20,179 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 22:30:20,179 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 22:30:20,182 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 22:30:20,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:30:19" (1/3) ... [2020-07-20 22:30:20,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5887f920 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:30:20, skipping insertion in model container [2020-07-20 22:30:20,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:30:19" (2/3) ... [2020-07-20 22:30:20,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5887f920 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:30:20, skipping insertion in model container [2020-07-20 22:30:20,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:30:20" (3/3) ... [2020-07-20 22:30:20,186 INFO L109 eAbstractionObserver]: Analyzing ICFG cggmp2005b.i [2020-07-20 22:30:20,197 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 22:30:20,205 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 22:30:20,223 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 22:30:20,256 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 22:30:20,256 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 22:30:20,256 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 22:30:20,256 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 22:30:20,256 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 22:30:20,256 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 22:30:20,257 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 22:30:20,257 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 22:30:20,282 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-20 22:30:20,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 22:30:20,291 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:30:20,292 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:30:20,293 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:30:20,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:30:20,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1039733575, now seen corresponding path program 1 times [2020-07-20 22:30:20,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:30:20,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954415597] [2020-07-20 22:30:20,313 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:30:20,394 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:30:20,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:30:20,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 22:30:20,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:30:20,425 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 22:30:20,425 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:30:20,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954415597] [2020-07-20 22:30:20,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:30:20,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 22:30:20,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580635776] [2020-07-20 22:30:20,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 22:30:20,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:30:20,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 22:30:20,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 22:30:20,446 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-07-20 22:30:20,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:30:20,468 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2020-07-20 22:30:20,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 22:30:20,470 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-20 22:30:20,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:30:20,488 INFO L225 Difference]: With dead ends: 37 [2020-07-20 22:30:20,488 INFO L226 Difference]: Without dead ends: 14 [2020-07-20 22:30:20,495 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 [2020-07-20 22:30:20,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-20 22:30:20,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-20 22:30:20,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-20 22:30:20,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-07-20 22:30:20,539 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2020-07-20 22:30:20,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:30:20,539 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-07-20 22:30:20,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 22:30:20,539 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-07-20 22:30:20,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 22:30:20,540 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:30:20,540 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:30:20,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:30:20,748 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:30:20,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:30:20,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1066515684, now seen corresponding path program 1 times [2020-07-20 22:30:20,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:30:20,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808185430] [2020-07-20 22:30:20,751 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:30:20,771 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 22:30:20,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:30:20,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 22:30:20,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:30:20,825 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 22:30:20,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:30:20,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808185430] [2020-07-20 22:30:20,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:30:20,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 22:30:20,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943226069] [2020-07-20 22:30:20,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 22:30:20,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:30:20,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 22:30:20,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:30:20,833 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 3 states. [2020-07-20 22:30:20,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:30:20,858 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2020-07-20 22:30:20,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 22:30:20,860 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-07-20 22:30:20,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:30:20,862 INFO L225 Difference]: With dead ends: 20 [2020-07-20 22:30:20,862 INFO L226 Difference]: Without dead ends: 15 [2020-07-20 22:30:20,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:30:20,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-20 22:30:20,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-20 22:30:20,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-20 22:30:20,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-07-20 22:30:20,873 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2020-07-20 22:30:20,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:30:20,875 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-07-20 22:30:20,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 22:30:20,875 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-07-20 22:30:20,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 22:30:20,876 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:30:20,876 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:30:21,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:30:21,083 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:30:21,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:30:21,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1875131310, now seen corresponding path program 1 times [2020-07-20 22:30:21,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:30:21,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922572201] [2020-07-20 22:30:21,086 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:30:21,113 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 22:30:21,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:30:21,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 22:30:21,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:30:21,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:30:21,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:30:21,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922572201] [2020-07-20 22:30:21,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:30:21,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 22:30:21,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423859120] [2020-07-20 22:30:21,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 22:30:21,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:30:21,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 22:30:21,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:30:21,136 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 3 states. [2020-07-20 22:30:21,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:30:21,147 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2020-07-20 22:30:21,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 22:30:21,148 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-07-20 22:30:21,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:30:21,149 INFO L225 Difference]: With dead ends: 25 [2020-07-20 22:30:21,149 INFO L226 Difference]: Without dead ends: 16 [2020-07-20 22:30:21,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:30:21,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-07-20 22:30:21,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-07-20 22:30:21,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-07-20 22:30:21,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-07-20 22:30:21,155 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 14 [2020-07-20 22:30:21,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:30:21,155 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-07-20 22:30:21,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 22:30:21,156 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-07-20 22:30:21,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 22:30:21,157 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:30:21,157 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:30:21,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:30:21,371 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:30:21,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:30:21,372 INFO L82 PathProgramCache]: Analyzing trace with hash -224898986, now seen corresponding path program 1 times [2020-07-20 22:30:21,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:30:21,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113897228] [2020-07-20 22:30:21,372 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:30:21,396 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:30:21,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:30:21,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 22:30:21,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:30:21,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 22:30:21,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:30:21,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 22:30:21,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113897228] [2020-07-20 22:30:21,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:30:21,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-20 22:30:21,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163741271] [2020-07-20 22:30:21,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 22:30:21,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:30:21,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 22:30:21,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:30:21,466 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 6 states. [2020-07-20 22:30:21,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:30:21,523 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2020-07-20 22:30:21,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 22:30:21,524 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-07-20 22:30:21,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:30:21,525 INFO L225 Difference]: With dead ends: 33 [2020-07-20 22:30:21,525 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 22:30:21,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:30:21,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 22:30:21,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-20 22:30:21,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 22:30:21,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2020-07-20 22:30:21,534 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 15 [2020-07-20 22:30:21,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:30:21,535 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2020-07-20 22:30:21,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 22:30:21,535 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2020-07-20 22:30:21,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 22:30:21,536 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:30:21,536 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:30:21,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:30:21,750 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:30:21,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:30:21,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1954211852, now seen corresponding path program 2 times [2020-07-20 22:30:21,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:30:21,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589764332] [2020-07-20 22:30:21,753 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:30:21,791 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:30:21,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:30:21,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 22:30:21,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:30:21,843 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 22:30:21,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:30:21,887 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 22:30:21,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589764332] [2020-07-20 22:30:21,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:30:21,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-20 22:30:21,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133502988] [2020-07-20 22:30:21,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 22:30:21,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:30:21,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 22:30:21,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-07-20 22:30:21,890 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand 8 states. [2020-07-20 22:30:21,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:30:21,938 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2020-07-20 22:30:21,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 22:30:21,939 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-07-20 22:30:21,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:30:21,940 INFO L225 Difference]: With dead ends: 50 [2020-07-20 22:30:21,940 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 22:30:21,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2020-07-20 22:30:21,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 22:30:21,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 22:30:21,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 22:30:21,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2020-07-20 22:30:21,949 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 27 [2020-07-20 22:30:21,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:30:21,950 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2020-07-20 22:30:21,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 22:30:21,950 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2020-07-20 22:30:21,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 22:30:21,951 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:30:21,951 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:30:22,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:30:22,167 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:30:22,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:30:22,168 INFO L82 PathProgramCache]: Analyzing trace with hash -745377012, now seen corresponding path program 3 times [2020-07-20 22:30:22,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:30:22,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948867119] [2020-07-20 22:30:22,169 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:30:22,198 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:30:22,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:30:22,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 22:30:22,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:30:22,332 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 22:30:22,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:30:22,446 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 22:30:22,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948867119] [2020-07-20 22:30:22,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:30:22,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-20 22:30:22,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90316452] [2020-07-20 22:30:22,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 22:30:22,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:30:22,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 22:30:22,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-07-20 22:30:22,449 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 12 states. [2020-07-20 22:30:22,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:30:22,625 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2020-07-20 22:30:22,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 22:30:22,627 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-07-20 22:30:22,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:30:22,628 INFO L225 Difference]: With dead ends: 54 [2020-07-20 22:30:22,628 INFO L226 Difference]: Without dead ends: 34 [2020-07-20 22:30:22,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2020-07-20 22:30:22,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-20 22:30:22,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-07-20 22:30:22,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-20 22:30:22,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2020-07-20 22:30:22,650 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 29 [2020-07-20 22:30:22,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:30:22,650 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2020-07-20 22:30:22,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 22:30:22,650 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2020-07-20 22:30:22,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-20 22:30:22,652 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:30:22,652 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:30:22,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:30:22,868 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:30:22,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:30:22,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1833781516, now seen corresponding path program 4 times [2020-07-20 22:30:22,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:30:22,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952493560] [2020-07-20 22:30:22,869 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:30:22,894 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:30:22,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:30:22,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 22:30:22,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:30:23,066 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 22:30:23,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:30:23,300 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 22:30:23,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952493560] [2020-07-20 22:30:23,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:30:23,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-07-20 22:30:23,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049293589] [2020-07-20 22:30:23,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 22:30:23,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:30:23,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 22:30:23,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2020-07-20 22:30:23,304 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand 20 states. [2020-07-20 22:30:23,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:30:23,852 INFO L93 Difference]: Finished difference Result 62 states and 85 transitions. [2020-07-20 22:30:23,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 22:30:23,853 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 33 [2020-07-20 22:30:23,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:30:23,854 INFO L225 Difference]: With dead ends: 62 [2020-07-20 22:30:23,854 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 22:30:23,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=437, Invalid=685, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 22:30:23,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 22:30:23,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-20 22:30:23,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-20 22:30:23,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-07-20 22:30:23,863 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 33 [2020-07-20 22:30:23,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:30:23,864 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-07-20 22:30:23,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 22:30:23,864 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-07-20 22:30:23,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-20 22:30:23,865 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:30:23,865 INFO L422 BasicCegarLoop]: trace histogram [15, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:30:24,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:30:24,068 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:30:24,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:30:24,069 INFO L82 PathProgramCache]: Analyzing trace with hash -701369076, now seen corresponding path program 5 times [2020-07-20 22:30:24,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:30:24,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926202090] [2020-07-20 22:30:24,071 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:30:24,100 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:30:24,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:30:24,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 22:30:24,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:30:24,412 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 52 proven. 120 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 22:30:24,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:30:25,038 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 52 proven. 120 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 22:30:25,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926202090] [2020-07-20 22:30:25,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:30:25,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2020-07-20 22:30:25,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072662451] [2020-07-20 22:30:25,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-20 22:30:25,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:30:25,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-20 22:30:25,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=900, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 22:30:25,042 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 36 states. [2020-07-20 22:30:26,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:30:26,822 INFO L93 Difference]: Finished difference Result 78 states and 109 transitions. [2020-07-20 22:30:26,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-20 22:30:26,824 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 41 [2020-07-20 22:30:26,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:30:26,827 INFO L225 Difference]: With dead ends: 78 [2020-07-20 22:30:26,827 INFO L226 Difference]: Without dead ends: 58 [2020-07-20 22:30:26,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1637, Invalid=2653, Unknown=0, NotChecked=0, Total=4290 [2020-07-20 22:30:26,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-20 22:30:26,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-07-20 22:30:26,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-07-20 22:30:26,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2020-07-20 22:30:26,846 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 41 [2020-07-20 22:30:26,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:30:26,847 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2020-07-20 22:30:26,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-20 22:30:26,850 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2020-07-20 22:30:26,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-20 22:30:26,851 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:30:26,851 INFO L422 BasicCegarLoop]: trace histogram [31, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:30:27,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:30:27,053 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:30:27,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:30:27,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1471630604, now seen corresponding path program 6 times [2020-07-20 22:30:27,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:30:27,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285069076] [2020-07-20 22:30:27,056 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:30:27,090 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:30:27,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:30:27,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-20 22:30:27,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:30:28,030 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 100 proven. 496 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 22:30:28,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:30:30,181 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 100 proven. 496 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 22:30:30,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285069076] [2020-07-20 22:30:30,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:30:30,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 68 [2020-07-20 22:30:30,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363065018] [2020-07-20 22:30:30,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-07-20 22:30:30,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:30:30,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-07-20 22:30:30,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1224, Invalid=3332, Unknown=0, NotChecked=0, Total=4556 [2020-07-20 22:30:30,194 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 68 states. [2020-07-20 22:30:38,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:30:38,026 INFO L93 Difference]: Finished difference Result 110 states and 157 transitions. [2020-07-20 22:30:38,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-07-20 22:30:38,027 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 57 [2020-07-20 22:30:38,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:30:38,028 INFO L225 Difference]: With dead ends: 110 [2020-07-20 22:30:38,028 INFO L226 Difference]: Without dead ends: 90 [2020-07-20 22:30:38,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2944 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=6341, Invalid=10429, Unknown=0, NotChecked=0, Total=16770 [2020-07-20 22:30:38,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-07-20 22:30:38,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-07-20 22:30:38,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-20 22:30:38,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 98 transitions. [2020-07-20 22:30:38,062 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 98 transitions. Word has length 57 [2020-07-20 22:30:38,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:30:38,063 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 98 transitions. [2020-07-20 22:30:38,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-07-20 22:30:38,063 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 98 transitions. [2020-07-20 22:30:38,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-07-20 22:30:38,068 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:30:38,068 INFO L422 BasicCegarLoop]: trace histogram [63, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:30:38,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:30:38,284 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:30:38,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:30:38,285 INFO L82 PathProgramCache]: Analyzing trace with hash -374211316, now seen corresponding path program 7 times [2020-07-20 22:30:38,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:30:38,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404057044] [2020-07-20 22:30:38,286 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:30:38,342 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 22:30:38,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:30:38,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 67 conjunts are in the unsatisfiable core [2020-07-20 22:30:38,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:30:41,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 196 proven. 2016 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 22:30:41,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:30:50,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 196 proven. 2016 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 22:30:50,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404057044] [2020-07-20 22:30:50,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:30:50,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 132 [2020-07-20 22:30:50,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167361470] [2020-07-20 22:30:50,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2020-07-20 22:30:50,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:30:50,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2020-07-20 22:30:50,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4404, Invalid=12888, Unknown=0, NotChecked=0, Total=17292 [2020-07-20 22:30:50,932 INFO L87 Difference]: Start difference. First operand 90 states and 98 transitions. Second operand 132 states. [2020-07-20 22:30:51,166 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 10 [2020-07-20 22:30:51,420 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 12 [2020-07-20 22:30:51,628 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2020-07-20 22:30:51,822 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 13 [2020-07-20 22:30:52,034 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 13 [2020-07-20 22:30:52,267 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 13 [2020-07-20 22:30:52,511 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 13 [2020-07-20 22:30:52,728 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 13 [2020-07-20 22:30:52,943 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 13 [2020-07-20 22:30:53,153 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 13 [2020-07-20 22:30:53,377 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 13 [2020-07-20 22:30:53,594 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 13 [2020-07-20 22:30:53,823 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 13 [2020-07-20 22:30:54,056 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 13 [2020-07-20 22:30:54,288 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 13 [2020-07-20 22:30:54,511 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 13 [2020-07-20 22:30:54,731 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 13 [2020-07-20 22:30:54,956 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 13 [2020-07-20 22:30:55,172 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 13 [2020-07-20 22:30:55,407 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 13 [2020-07-20 22:30:55,668 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 13 [2020-07-20 22:30:55,925 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 13 [2020-07-20 22:30:56,185 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 13 [2020-07-20 22:30:56,448 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 13 [2020-07-20 22:30:56,713 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 13 [2020-07-20 22:31:05,940 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 16 [2020-07-20 22:31:06,533 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 9 [2020-07-20 22:31:07,115 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 9 [2020-07-20 22:31:07,704 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 9 [2020-07-20 22:31:08,274 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 9 [2020-07-20 22:31:08,861 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 9 [2020-07-20 22:31:09,459 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 9 [2020-07-20 22:31:10,059 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 9 [2020-07-20 22:31:10,646 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 9 [2020-07-20 22:31:11,242 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 9 [2020-07-20 22:31:11,827 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 9 [2020-07-20 22:31:12,413 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 9 [2020-07-20 22:31:13,009 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 9 [2020-07-20 22:31:13,597 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 9 [2020-07-20 22:31:14,180 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 9 [2020-07-20 22:31:14,756 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 9 [2020-07-20 22:31:15,352 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 9 [2020-07-20 22:31:15,944 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 9 [2020-07-20 22:31:16,522 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 9 [2020-07-20 22:31:17,114 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 9 [2020-07-20 22:31:35,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:31:35,133 INFO L93 Difference]: Finished difference Result 167 states and 239 transitions. [2020-07-20 22:31:35,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2020-07-20 22:31:35,135 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 89 [2020-07-20 22:31:35,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:31:35,137 INFO L225 Difference]: With dead ends: 167 [2020-07-20 22:31:35,138 INFO L226 Difference]: Without dead ends: 147 [2020-07-20 22:31:35,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11163 ImplicationChecksByTransitivity, 55.9s TimeCoverageRelationStatistics Valid=23060, Invalid=39690, Unknown=0, NotChecked=0, Total=62750 [2020-07-20 22:31:35,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-07-20 22:31:35,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2020-07-20 22:31:35,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-20 22:31:35,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 155 transitions. [2020-07-20 22:31:35,167 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 155 transitions. Word has length 89 [2020-07-20 22:31:35,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:31:35,168 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 155 transitions. [2020-07-20 22:31:35,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 132 states. [2020-07-20 22:31:35,168 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 155 transitions. [2020-07-20 22:31:35,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-07-20 22:31:35,170 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:31:35,171 INFO L422 BasicCegarLoop]: trace histogram [120, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:31:35,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:31:35,379 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:31:35,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:31:35,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1451426972, now seen corresponding path program 8 times [2020-07-20 22:31:35,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:31:35,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [989696489] [2020-07-20 22:31:35,382 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:31:35,487 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 22:31:35,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:31:35,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 22:31:35,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:31:35,580 INFO L134 CoverageAnalysis]: Checked inductivity of 7648 backedges. 0 proven. 388 refuted. 0 times theorem prover too weak. 7260 trivial. 0 not checked. [2020-07-20 22:31:35,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:31:35,704 INFO L134 CoverageAnalysis]: Checked inductivity of 7648 backedges. 0 proven. 388 refuted. 0 times theorem prover too weak. 7260 trivial. 0 not checked. [2020-07-20 22:31:35,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [989696489] [2020-07-20 22:31:35,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:31:35,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-20 22:31:35,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023139675] [2020-07-20 22:31:35,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 22:31:35,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:31:35,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 22:31:35,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-07-20 22:31:35,706 INFO L87 Difference]: Start difference. First operand 147 states and 155 transitions. Second operand 12 states. [2020-07-20 22:31:35,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:31:35,782 INFO L93 Difference]: Finished difference Result 176 states and 201 transitions. [2020-07-20 22:31:35,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 22:31:35,784 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 146 [2020-07-20 22:31:35,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:31:35,786 INFO L225 Difference]: With dead ends: 176 [2020-07-20 22:31:35,786 INFO L226 Difference]: Without dead ends: 171 [2020-07-20 22:31:35,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-07-20 22:31:35,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-07-20 22:31:35,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2020-07-20 22:31:35,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-07-20 22:31:35,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 191 transitions. [2020-07-20 22:31:35,802 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 191 transitions. Word has length 146 [2020-07-20 22:31:35,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:31:35,803 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 191 transitions. [2020-07-20 22:31:35,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 22:31:35,803 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 191 transitions. [2020-07-20 22:31:35,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-07-20 22:31:35,805 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:31:35,806 INFO L422 BasicCegarLoop]: trace histogram [120, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:31:36,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:31:36,019 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:31:36,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:31:36,020 INFO L82 PathProgramCache]: Analyzing trace with hash -699301936, now seen corresponding path program 9 times [2020-07-20 22:31:36,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:31:36,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771544121] [2020-07-20 22:31:36,021 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:31:36,106 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 22:31:36,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:31:36,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 22:31:36,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:31:36,368 INFO L134 CoverageAnalysis]: Checked inductivity of 8530 backedges. 0 proven. 1270 refuted. 0 times theorem prover too weak. 7260 trivial. 0 not checked. [2020-07-20 22:31:36,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:31:36,833 INFO L134 CoverageAnalysis]: Checked inductivity of 8530 backedges. 0 proven. 1270 refuted. 0 times theorem prover too weak. 7260 trivial. 0 not checked. [2020-07-20 22:31:36,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771544121] [2020-07-20 22:31:36,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:31:36,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-07-20 22:31:36,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915268819] [2020-07-20 22:31:36,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 22:31:36,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:31:36,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 22:31:36,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-07-20 22:31:36,836 INFO L87 Difference]: Start difference. First operand 171 states and 191 transitions. Second operand 24 states. [2020-07-20 22:31:37,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:31:37,029 INFO L93 Difference]: Finished difference Result 224 states and 279 transitions. [2020-07-20 22:31:37,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 22:31:37,031 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 170 [2020-07-20 22:31:37,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:31:37,033 INFO L225 Difference]: With dead ends: 224 [2020-07-20 22:31:37,034 INFO L226 Difference]: Without dead ends: 219 [2020-07-20 22:31:37,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-07-20 22:31:37,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-07-20 22:31:37,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2020-07-20 22:31:37,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-07-20 22:31:37,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 263 transitions. [2020-07-20 22:31:37,064 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 263 transitions. Word has length 170 [2020-07-20 22:31:37,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:31:37,066 INFO L479 AbstractCegarLoop]: Abstraction has 219 states and 263 transitions. [2020-07-20 22:31:37,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 22:31:37,066 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 263 transitions. [2020-07-20 22:31:37,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-07-20 22:31:37,070 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:31:37,071 INFO L422 BasicCegarLoop]: trace histogram [120, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:31:37,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:31:37,277 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:31:37,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:31:37,278 INFO L82 PathProgramCache]: Analyzing trace with hash -377226072, now seen corresponding path program 10 times [2020-07-20 22:31:37,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:31:37,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895250805] [2020-07-20 22:31:37,279 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:31:37,376 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 22:31:37,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:31:37,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 22:31:37,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:31:38,154 INFO L134 CoverageAnalysis]: Checked inductivity of 10726 backedges. 0 proven. 3466 refuted. 0 times theorem prover too weak. 7260 trivial. 0 not checked. [2020-07-20 22:31:38,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:31:39,965 INFO L134 CoverageAnalysis]: Checked inductivity of 10726 backedges. 0 proven. 3466 refuted. 0 times theorem prover too weak. 7260 trivial. 0 not checked. [2020-07-20 22:31:39,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895250805] [2020-07-20 22:31:39,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:31:39,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2020-07-20 22:31:39,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064050668] [2020-07-20 22:31:39,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-07-20 22:31:39,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:31:39,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-07-20 22:31:39,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-07-20 22:31:39,968 INFO L87 Difference]: Start difference. First operand 219 states and 263 transitions. Second operand 48 states. [2020-07-20 22:31:40,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:31:40,394 INFO L93 Difference]: Finished difference Result 320 states and 435 transitions. [2020-07-20 22:31:40,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-07-20 22:31:40,396 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 218 [2020-07-20 22:31:40,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:31:40,399 INFO L225 Difference]: With dead ends: 320 [2020-07-20 22:31:40,399 INFO L226 Difference]: Without dead ends: 315 [2020-07-20 22:31:40,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-07-20 22:31:40,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-07-20 22:31:40,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2020-07-20 22:31:40,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2020-07-20 22:31:40,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 407 transitions. [2020-07-20 22:31:40,417 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 407 transitions. Word has length 218 [2020-07-20 22:31:40,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:31:40,418 INFO L479 AbstractCegarLoop]: Abstraction has 315 states and 407 transitions. [2020-07-20 22:31:40,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-07-20 22:31:40,418 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 407 transitions. [2020-07-20 22:31:40,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2020-07-20 22:31:40,422 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:31:40,423 INFO L422 BasicCegarLoop]: trace histogram [120, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:31:40,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:31:40,639 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:31:40,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:31:40,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1906391464, now seen corresponding path program 11 times [2020-07-20 22:31:40,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:31:40,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188244559] [2020-07-20 22:31:40,641 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:31:40,771 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 22:31:40,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:31:40,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 48 conjunts are in the unsatisfiable core [2020-07-20 22:31:40,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:31:43,440 INFO L134 CoverageAnalysis]: Checked inductivity of 16846 backedges. 0 proven. 9586 refuted. 0 times theorem prover too weak. 7260 trivial. 0 not checked. [2020-07-20 22:31:43,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:31:50,801 INFO L134 CoverageAnalysis]: Checked inductivity of 16846 backedges. 0 proven. 9586 refuted. 0 times theorem prover too weak. 7260 trivial. 0 not checked. [2020-07-20 22:31:50,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188244559] [2020-07-20 22:31:50,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:31:50,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 96 [2020-07-20 22:31:50,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967185427] [2020-07-20 22:31:50,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-07-20 22:31:50,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:31:50,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-07-20 22:31:50,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2020-07-20 22:31:50,806 INFO L87 Difference]: Start difference. First operand 315 states and 407 transitions. Second operand 96 states. [2020-07-20 22:31:52,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:31:52,164 INFO L93 Difference]: Finished difference Result 512 states and 747 transitions. [2020-07-20 22:31:52,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-07-20 22:31:52,166 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 314 [2020-07-20 22:31:52,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:31:52,169 INFO L225 Difference]: With dead ends: 512 [2020-07-20 22:31:52,170 INFO L226 Difference]: Without dead ends: 507 [2020-07-20 22:31:52,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 627 GetRequests, 533 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2020-07-20 22:31:52,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2020-07-20 22:31:52,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 507. [2020-07-20 22:31:52,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 507 states. [2020-07-20 22:31:52,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 695 transitions. [2020-07-20 22:31:52,192 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 695 transitions. Word has length 314 [2020-07-20 22:31:52,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:31:52,193 INFO L479 AbstractCegarLoop]: Abstraction has 507 states and 695 transitions. [2020-07-20 22:31:52,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-07-20 22:31:52,194 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 695 transitions. [2020-07-20 22:31:52,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2020-07-20 22:31:52,205 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:31:52,205 INFO L422 BasicCegarLoop]: trace histogram [120, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:31:52,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:31:52,419 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:31:52,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:31:52,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1953208760, now seen corresponding path program 12 times [2020-07-20 22:31:52,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:31:52,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552040102] [2020-07-20 22:31:52,420 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:31:52,585 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 22:31:52,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:31:52,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 96 conjunts are in the unsatisfiable core [2020-07-20 22:31:52,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:32:03,438 INFO L134 CoverageAnalysis]: Checked inductivity of 35998 backedges. 0 proven. 28738 refuted. 0 times theorem prover too weak. 7260 trivial. 0 not checked. [2020-07-20 22:32:03,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:32:15,588 INFO L134 CoverageAnalysis]: Checked inductivity of 35998 backedges. 0 proven. 28738 refuted. 0 times theorem prover too weak. 7260 trivial. 0 not checked. [2020-07-20 22:32:15,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552040102] [2020-07-20 22:32:15,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:32:15,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 103 [2020-07-20 22:32:15,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134812745] [2020-07-20 22:32:15,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2020-07-20 22:32:15,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:32:15,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2020-07-20 22:32:15,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2020-07-20 22:32:15,593 INFO L87 Difference]: Start difference. First operand 507 states and 695 transitions. Second operand 103 states. [2020-07-20 22:32:17,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:32:17,051 INFO L93 Difference]: Finished difference Result 540 states and 748 transitions. [2020-07-20 22:32:17,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-07-20 22:32:17,053 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 506 [2020-07-20 22:32:17,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:32:17,058 INFO L225 Difference]: With dead ends: 540 [2020-07-20 22:32:17,058 INFO L226 Difference]: Without dead ends: 535 [2020-07-20 22:32:17,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1011 GetRequests, 821 SyntacticMatches, 89 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4450 ImplicationChecksByTransitivity, 22.4s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2020-07-20 22:32:17,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2020-07-20 22:32:17,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 535. [2020-07-20 22:32:17,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 535 states. [2020-07-20 22:32:17,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 737 transitions. [2020-07-20 22:32:17,082 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 737 transitions. Word has length 506 [2020-07-20 22:32:17,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:32:17,083 INFO L479 AbstractCegarLoop]: Abstraction has 535 states and 737 transitions. [2020-07-20 22:32:17,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 103 states. [2020-07-20 22:32:17,083 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 737 transitions. [2020-07-20 22:32:17,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2020-07-20 22:32:17,087 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:32:17,088 INFO L422 BasicCegarLoop]: trace histogram [120, 101, 101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:32:17,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:32:17,296 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:32:17,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:32:17,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1254004406, now seen corresponding path program 13 times [2020-07-20 22:32:17,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:32:17,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353734155] [2020-07-20 22:32:17,298 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:32:17,459 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 22:32:17,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:32:17,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 1093 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 22:32:17,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:32:17,625 INFO L134 CoverageAnalysis]: Checked inductivity of 39561 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 39360 trivial. 0 not checked. [2020-07-20 22:32:17,625 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:32:17,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353734155] [2020-07-20 22:32:17,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:32:17,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 22:32:17,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397369002] [2020-07-20 22:32:17,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 22:32:17,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:32:17,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 22:32:17,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 22:32:17,627 INFO L87 Difference]: Start difference. First operand 535 states and 737 transitions. Second operand 5 states. [2020-07-20 22:32:17,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:32:17,686 INFO L93 Difference]: Finished difference Result 940 states and 1344 transitions. [2020-07-20 22:32:17,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 22:32:17,686 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 534 [2020-07-20 22:32:17,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:32:17,688 INFO L225 Difference]: With dead ends: 940 [2020-07-20 22:32:17,688 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 22:32:17,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 530 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:32:17,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 22:32:17,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 22:32:17,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 22:32:17,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 22:32:17,693 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 534 [2020-07-20 22:32:17,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:32:17,694 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 22:32:17,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 22:32:17,694 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 22:32:17,694 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 22:32:17,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:32:17,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 22:32:18,135 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 3 [2020-07-20 22:32:18,327 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 735 DAG size of output: 7 [2020-07-20 22:32:18,505 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 22:32:18,505 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 22:32:18,505 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 22:32:18,506 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 22:32:18,506 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 22:32:18,506 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 22:32:18,506 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-20 22:32:18,506 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-20 22:32:18,506 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-20 22:32:18,506 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-20 22:32:18,507 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 30) no Hoare annotation was computed. [2020-07-20 22:32:18,507 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 30) no Hoare annotation was computed. [2020-07-20 22:32:18,507 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 30) the Hoare annotation is: true [2020-07-20 22:32:18,507 INFO L268 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-07-20 22:32:18,507 INFO L264 CegarLoopResult]: At program point L24-2(lines 24 26) the Hoare annotation is: (= 4 main_~k~0) [2020-07-20 22:32:18,507 INFO L264 CegarLoopResult]: At program point L24-3(lines 18 27) the Hoare annotation is: (or (and (<= main_~i~0 0) (<= (+ main_~j~0 100) (* 62 main_~i~0))) (= 4 main_~k~0)) [2020-07-20 22:32:18,507 INFO L264 CegarLoopResult]: At program point L20-2(lines 20 22) the Hoare annotation is: (or (= 4 main_~k~0) (<= main_~i~0 1)) [2020-07-20 22:32:18,508 INFO L268 CegarLoopResult]: For program point L20-3(lines 20 22) no Hoare annotation was computed. [2020-07-20 22:32:18,508 INFO L264 CegarLoopResult]: At program point L18-2(lines 18 27) the Hoare annotation is: (= 4 main_~k~0) [2020-07-20 22:32:18,508 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-20 22:32:18,508 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-20 22:32:18,508 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-20 22:32:18,508 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-20 22:32:18,508 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-20 22:32:18,509 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-20 22:32:18,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:32:18 BoogieIcfgContainer [2020-07-20 22:32:18,530 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 22:32:18,532 INFO L168 Benchmark]: Toolchain (without parser) took 118974.49 ms. Allocated memory was 145.8 MB in the beginning and 515.9 MB in the end (delta: 370.1 MB). Free memory was 103.5 MB in the beginning and 105.4 MB in the end (delta: -1.9 MB). Peak memory consumption was 368.2 MB. Max. memory is 7.1 GB. [2020-07-20 22:32:18,532 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 145.8 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 22:32:18,533 INFO L168 Benchmark]: CACSL2BoogieTranslator took 223.91 ms. Allocated memory is still 145.8 MB. Free memory was 103.1 MB in the beginning and 93.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-20 22:32:18,534 INFO L168 Benchmark]: Boogie Preprocessor took 112.63 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 93.7 MB in the beginning and 182.5 MB in the end (delta: -88.8 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-07-20 22:32:18,534 INFO L168 Benchmark]: RCFGBuilder took 281.02 ms. Allocated memory is still 202.4 MB. Free memory was 182.5 MB in the beginning and 168.8 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-07-20 22:32:18,535 INFO L168 Benchmark]: TraceAbstraction took 118351.20 ms. Allocated memory was 202.4 MB in the beginning and 515.9 MB in the end (delta: 313.5 MB). Free memory was 168.8 MB in the beginning and 105.4 MB in the end (delta: 63.4 MB). Peak memory consumption was 376.9 MB. Max. memory is 7.1 GB. [2020-07-20 22:32:18,537 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 145.8 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 223.91 ms. Allocated memory is still 145.8 MB. Free memory was 103.1 MB in the beginning and 93.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.63 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 93.7 MB in the beginning and 182.5 MB in the end (delta: -88.8 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 281.02 ms. Allocated memory is still 202.4 MB. Free memory was 182.5 MB in the beginning and 168.8 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 118351.20 ms. Allocated memory was 202.4 MB in the beginning and 515.9 MB in the end (delta: 313.5 MB). Free memory was 168.8 MB in the beginning and 105.4 MB in the end (delta: 63.4 MB). Peak memory consumption was 376.9 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: 24]: Loop Invariant Derived loop invariant: 4 == k - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: 4 == k || i <= 1 - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: (i <= 0 && j + 100 <= 62 * i) || 4 == k - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 117.6s, OverallIterations: 16, TraceHistogramMax: 120, AutomataDifference: 58.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 236 SDtfs, 2303 SDslu, 2810 SDs, 0 SdLazy, 1254 SolverSat, 528 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4075 GetRequests, 3207 SyntacticMatches, 89 SemanticMatches, 779 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19455 ImplicationChecksByTransitivity, 105.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=535occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 16 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 25 PreInvPairs, 450 NumberOfFragments, 33 HoareAnnotationTreeSize, 25 FomulaSimplifications, 5777 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 9 FomulaSimplificationsInter, 33 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 54.2s InterpolantComputationTime, 2213 NumberOfCodeBlocks, 2116 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 3830 ConstructedInterpolants, 0 QuantifiedInterpolants, 3112042 SizeOfPredicates, 22 NumberOfNonLiveVariables, 4894 ConjunctsInSsa, 343 ConjunctsInUnsatCore, 28 InterpolantComputations, 4 PerfectInterpolantSequences, 113220/205452 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...