./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/sumt8.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/sumt8.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9dc8ca4954e14958c8c0d82261bfa8f8ff442173 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 01:08:22,395 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 01:08:22,399 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 01:08:22,441 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 01:08:22,441 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 01:08:22,451 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 01:08:22,452 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 01:08:22,455 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 01:08:22,458 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 01:08:22,460 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 01:08:22,461 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 01:08:22,463 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 01:08:22,465 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 01:08:22,468 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 01:08:22,471 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 01:08:22,472 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 01:08:22,474 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 01:08:22,476 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 01:08:22,479 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 01:08:22,482 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 01:08:22,485 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 01:08:22,488 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 01:08:22,490 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 01:08:22,492 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 01:08:22,495 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 01:08:22,503 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 01:08:22,503 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 01:08:22,504 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 01:08:22,505 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 01:08:22,506 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 01:08:22,508 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 01:08:22,509 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 01:08:22,510 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 01:08:22,511 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 01:08:22,513 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 01:08:22,514 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 01:08:22,515 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 01:08:22,515 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 01:08:22,515 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 01:08:22,516 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 01:08:22,517 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 01:08:22,518 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 01:08:22,566 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 01:08:22,566 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 01:08:22,568 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 01:08:22,569 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 01:08:22,569 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 01:08:22,569 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 01:08:22,569 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 01:08:22,570 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 01:08:22,570 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 01:08:22,570 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 01:08:22,571 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 01:08:22,572 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 01:08:22,572 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 01:08:22,572 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 01:08:22,573 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 01:08:22,573 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 01:08:22,573 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 01:08:22,574 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 01:08:22,574 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 01:08:22,574 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 01:08:22,575 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 01:08:22,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 01:08:22,575 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 01:08:22,575 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 01:08:22,576 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 01:08:22,576 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 01:08:22,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 01:08:22,576 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 01:08:22,577 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 01:08:22,577 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9dc8ca4954e14958c8c0d82261bfa8f8ff442173 [2020-10-20 01:08:22,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 01:08:22,811 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 01:08:22,815 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 01:08:22,817 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 01:08:22,818 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 01:08:22,819 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/sumt8.c [2020-10-20 01:08:22,889 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e40350726/07d2fa44d7a24d90b195a23bb150e02f/FLAG1032e0898 [2020-10-20 01:08:23,453 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 01:08:23,454 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/sumt8.c [2020-10-20 01:08:23,460 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e40350726/07d2fa44d7a24d90b195a23bb150e02f/FLAG1032e0898 [2020-10-20 01:08:23,832 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e40350726/07d2fa44d7a24d90b195a23bb150e02f [2020-10-20 01:08:23,836 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 01:08:23,844 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 01:08:23,845 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 01:08:23,845 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 01:08:23,849 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 01:08:23,850 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 01:08:23" (1/1) ... [2020-10-20 01:08:23,853 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@540fba32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:08:23, skipping insertion in model container [2020-10-20 01:08:23,854 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 01:08:23" (1/1) ... [2020-10-20 01:08:23,862 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 01:08:23,881 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 01:08:24,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 01:08:24,106 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 01:08:24,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 01:08:24,148 INFO L208 MainTranslator]: Completed translation [2020-10-20 01:08:24,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:08:24 WrapperNode [2020-10-20 01:08:24,149 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 01:08:24,150 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 01:08:24,150 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 01:08:24,151 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 01:08:24,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:08:24" (1/1) ... [2020-10-20 01:08:24,170 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:08:24" (1/1) ... [2020-10-20 01:08:24,194 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 01:08:24,195 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 01:08:24,195 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 01:08:24,195 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 01:08:24,206 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:08:24" (1/1) ... [2020-10-20 01:08:24,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:08:24" (1/1) ... [2020-10-20 01:08:24,208 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:08:24" (1/1) ... [2020-10-20 01:08:24,209 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:08:24" (1/1) ... [2020-10-20 01:08:24,213 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:08:24" (1/1) ... [2020-10-20 01:08:24,218 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:08:24" (1/1) ... [2020-10-20 01:08:24,220 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:08:24" (1/1) ... [2020-10-20 01:08:24,222 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 01:08:24,223 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 01:08:24,223 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 01:08:24,223 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 01:08:24,224 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:08:24" (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 [2020-10-20 01:08:24,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 01:08:24,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 01:08:24,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 01:08:24,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 01:08:24,576 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 01:08:24,577 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-20 01:08:24,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:08:24 BoogieIcfgContainer [2020-10-20 01:08:24,580 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 01:08:24,583 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 01:08:24,583 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 01:08:24,587 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 01:08:24,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 01:08:23" (1/3) ... [2020-10-20 01:08:24,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65a11a20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 01:08:24, skipping insertion in model container [2020-10-20 01:08:24,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:08:24" (2/3) ... [2020-10-20 01:08:24,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65a11a20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 01:08:24, skipping insertion in model container [2020-10-20 01:08:24,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:08:24" (3/3) ... [2020-10-20 01:08:24,591 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt8.c [2020-10-20 01:08:24,607 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 01:08:24,617 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 01:08:24,644 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 01:08:24,673 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 01:08:24,674 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 01:08:24,674 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 01:08:24,674 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 01:08:24,675 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 01:08:24,675 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 01:08:24,675 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 01:08:24,676 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 01:08:24,700 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-10-20 01:08:24,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-20 01:08:24,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:08:24,708 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:08:24,709 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:08:24,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:08:24,715 INFO L82 PathProgramCache]: Analyzing trace with hash 183352048, now seen corresponding path program 1 times [2020-10-20 01:08:24,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:08:24,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496054287] [2020-10-20 01:08:24,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:08:24,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:08:25,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:08:25,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496054287] [2020-10-20 01:08:25,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:08:25,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 01:08:25,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204234774] [2020-10-20 01:08:25,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 01:08:25,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:08:25,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 01:08:25,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 01:08:25,187 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-10-20 01:08:25,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:08:25,346 INFO L93 Difference]: Finished difference Result 44 states and 66 transitions. [2020-10-20 01:08:25,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 01:08:25,349 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-20 01:08:25,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:08:25,372 INFO L225 Difference]: With dead ends: 44 [2020-10-20 01:08:25,372 INFO L226 Difference]: Without dead ends: 19 [2020-10-20 01:08:25,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 01:08:25,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-20 01:08:25,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-20 01:08:25,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-20 01:08:25,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 26 transitions. [2020-10-20 01:08:25,415 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 26 transitions. Word has length 8 [2020-10-20 01:08:25,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:08:25,416 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 26 transitions. [2020-10-20 01:08:25,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 01:08:25,416 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 26 transitions. [2020-10-20 01:08:25,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-20 01:08:25,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:08:25,417 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-10-20 01:08:25,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 01:08:25,418 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:08:25,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:08:25,419 INFO L82 PathProgramCache]: Analyzing trace with hash 543311139, now seen corresponding path program 1 times [2020-10-20 01:08:25,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:08:25,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435325275] [2020-10-20 01:08:25,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:08:25,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:08:25,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:08:25,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435325275] [2020-10-20 01:08:25,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232976014] [2020-10-20 01:08:25,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:08:25,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:08:25,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-20 01:08:25,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:08:25,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:08:25,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:08:25,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-10-20 01:08:25,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820060971] [2020-10-20 01:08:25,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 01:08:25,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:08:25,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 01:08:25,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-20 01:08:25,640 INFO L87 Difference]: Start difference. First operand 19 states and 26 transitions. Second operand 5 states. [2020-10-20 01:08:27,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:08:27,888 INFO L93 Difference]: Finished difference Result 52 states and 80 transitions. [2020-10-20 01:08:27,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 01:08:27,889 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-10-20 01:08:27,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:08:27,890 INFO L225 Difference]: With dead ends: 52 [2020-10-20 01:08:27,890 INFO L226 Difference]: Without dead ends: 40 [2020-10-20 01:08:27,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-20 01:08:27,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-20 01:08:27,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2020-10-20 01:08:27,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-20 01:08:27,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2020-10-20 01:08:27,900 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 12 [2020-10-20 01:08:27,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:08:27,900 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2020-10-20 01:08:27,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 01:08:27,901 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2020-10-20 01:08:27,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-20 01:08:27,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:08:27,902 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:08:28,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-20 01:08:28,114 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:08:28,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:08:28,115 INFO L82 PathProgramCache]: Analyzing trace with hash -176145870, now seen corresponding path program 1 times [2020-10-20 01:08:28,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:08:28,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833511087] [2020-10-20 01:08:28,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:08:28,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:08:28,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:08:28,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833511087] [2020-10-20 01:08:28,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881863642] [2020-10-20 01:08:28,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:08:28,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:08:28,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-20 01:08:28,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:08:28,662 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 01:08:28,669 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 01:08:28,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:08:28,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:08:28,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-10-20 01:08:28,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881944919] [2020-10-20 01:08:28,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-20 01:08:28,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:08:28,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-20 01:08:28,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-20 01:08:28,702 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand 10 states. [2020-10-20 01:08:28,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:08:28,934 INFO L93 Difference]: Finished difference Result 40 states and 53 transitions. [2020-10-20 01:08:28,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-20 01:08:28,935 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-20 01:08:28,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:08:28,936 INFO L225 Difference]: With dead ends: 40 [2020-10-20 01:08:28,937 INFO L226 Difference]: Without dead ends: 38 [2020-10-20 01:08:28,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-20 01:08:28,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-20 01:08:28,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-10-20 01:08:28,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-20 01:08:28,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-10-20 01:08:28,944 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 18 [2020-10-20 01:08:28,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:08:28,945 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-10-20 01:08:28,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-20 01:08:28,945 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-10-20 01:08:28,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-20 01:08:28,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:08:28,947 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:08:29,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:08:29,161 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:08:29,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:08:29,162 INFO L82 PathProgramCache]: Analyzing trace with hash -189133261, now seen corresponding path program 1 times [2020-10-20 01:08:29,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:08:29,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479425131] [2020-10-20 01:08:29,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:08:29,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:08:29,425 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:08:29,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479425131] [2020-10-20 01:08:29,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452725337] [2020-10-20 01:08:29,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:08:29,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:08:29,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-20 01:08:29,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:08:29,773 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-20 01:08:29,774 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 01:08:29,862 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:08:29,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:08:29,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 11 [2020-10-20 01:08:29,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582907750] [2020-10-20 01:08:29,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-20 01:08:29,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:08:29,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-20 01:08:29,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-20 01:08:29,866 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 11 states. [2020-10-20 01:08:30,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:08:30,558 INFO L93 Difference]: Finished difference Result 62 states and 89 transitions. [2020-10-20 01:08:30,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 01:08:30,559 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-10-20 01:08:30,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:08:30,561 INFO L225 Difference]: With dead ends: 62 [2020-10-20 01:08:30,561 INFO L226 Difference]: Without dead ends: 50 [2020-10-20 01:08:30,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-20 01:08:30,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-20 01:08:30,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-20 01:08:30,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-20 01:08:30,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-10-20 01:08:30,573 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2020-10-20 01:08:30,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:08:30,574 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-10-20 01:08:30,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-20 01:08:30,575 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-10-20 01:08:30,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-20 01:08:30,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:08:30,577 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:08:30,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:08:30,791 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:08:30,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:08:30,792 INFO L82 PathProgramCache]: Analyzing trace with hash 691349046, now seen corresponding path program 1 times [2020-10-20 01:08:30,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:08:30,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034387944] [2020-10-20 01:08:30,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:08:30,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:08:31,046 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:08:31,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034387944] [2020-10-20 01:08:31,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170936584] [2020-10-20 01:08:31,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:08:31,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:08:31,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 33 conjunts are in the unsatisfiable core [2020-10-20 01:08:31,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:08:31,273 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 01:08:31,275 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 01:08:31,305 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:08:31,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:08:31,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-10-20 01:08:31,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967670336] [2020-10-20 01:08:31,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-20 01:08:31,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:08:31,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-20 01:08:31,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-20 01:08:31,309 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 14 states. [2020-10-20 01:08:31,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:08:31,660 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2020-10-20 01:08:31,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-20 01:08:31,661 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2020-10-20 01:08:31,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:08:31,663 INFO L225 Difference]: With dead ends: 50 [2020-10-20 01:08:31,663 INFO L226 Difference]: Without dead ends: 48 [2020-10-20 01:08:31,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2020-10-20 01:08:31,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-20 01:08:31,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-10-20 01:08:31,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-20 01:08:31,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-10-20 01:08:31,671 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 28 [2020-10-20 01:08:31,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:08:31,672 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-10-20 01:08:31,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-20 01:08:31,672 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-10-20 01:08:31,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-20 01:08:31,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:08:31,674 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:08:31,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:08:31,889 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:08:31,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:08:31,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1367723012, now seen corresponding path program 1 times [2020-10-20 01:08:31,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:08:31,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939276364] [2020-10-20 01:08:31,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:08:31,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:08:32,077 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:08:32,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939276364] [2020-10-20 01:08:32,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380292402] [2020-10-20 01:08:32,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:08:32,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:08:32,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 37 conjunts are in the unsatisfiable core [2020-10-20 01:08:32,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:08:32,379 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:08:32,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:08:32,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11] total 15 [2020-10-20 01:08:32,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015486405] [2020-10-20 01:08:32,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-20 01:08:32,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:08:32,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-20 01:08:32,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-10-20 01:08:32,382 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 15 states. [2020-10-20 01:08:48,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:08:48,566 INFO L93 Difference]: Finished difference Result 85 states and 117 transitions. [2020-10-20 01:08:48,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-20 01:08:48,567 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-20 01:08:48,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:08:48,568 INFO L225 Difference]: With dead ends: 85 [2020-10-20 01:08:48,569 INFO L226 Difference]: Without dead ends: 73 [2020-10-20 01:08:48,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2020-10-20 01:08:48,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-20 01:08:48,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 66. [2020-10-20 01:08:48,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-20 01:08:48,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 85 transitions. [2020-10-20 01:08:48,578 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 85 transitions. Word has length 34 [2020-10-20 01:08:48,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:08:48,578 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 85 transitions. [2020-10-20 01:08:48,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-20 01:08:48,578 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 85 transitions. [2020-10-20 01:08:48,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-20 01:08:48,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:08:48,579 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:08:48,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-20 01:08:48,781 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:08:48,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:08:48,782 INFO L82 PathProgramCache]: Analyzing trace with hash 755607973, now seen corresponding path program 1 times [2020-10-20 01:08:48,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:08:48,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592482422] [2020-10-20 01:08:48,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:08:48,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:08:49,072 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:08:49,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592482422] [2020-10-20 01:08:49,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853278259] [2020-10-20 01:08:49,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:08:49,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:08:49,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 37 conjunts are in the unsatisfiable core [2020-10-20 01:08:49,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:08:49,356 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 01:08:49,358 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 01:08:49,401 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:08:49,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:08:49,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-10-20 01:08:49,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514400421] [2020-10-20 01:08:49,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-20 01:08:49,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:08:49,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-20 01:08:49,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-20 01:08:49,404 INFO L87 Difference]: Start difference. First operand 66 states and 85 transitions. Second operand 18 states. [2020-10-20 01:08:50,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:08:50,052 INFO L93 Difference]: Finished difference Result 80 states and 105 transitions. [2020-10-20 01:08:50,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-20 01:08:50,053 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 37 [2020-10-20 01:08:50,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:08:50,054 INFO L225 Difference]: With dead ends: 80 [2020-10-20 01:08:50,055 INFO L226 Difference]: Without dead ends: 78 [2020-10-20 01:08:50,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-10-20 01:08:50,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-20 01:08:50,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 68. [2020-10-20 01:08:50,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-20 01:08:50,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 87 transitions. [2020-10-20 01:08:50,066 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 87 transitions. Word has length 37 [2020-10-20 01:08:50,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:08:50,066 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 87 transitions. [2020-10-20 01:08:50,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-20 01:08:50,067 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 87 transitions. [2020-10-20 01:08:50,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-20 01:08:50,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:08:50,068 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:08:50,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:08:50,283 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:08:50,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:08:50,283 INFO L82 PathProgramCache]: Analyzing trace with hash -523382440, now seen corresponding path program 2 times [2020-10-20 01:08:50,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:08:50,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969731648] [2020-10-20 01:08:50,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:08:50,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:08:50,434 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:08:50,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969731648] [2020-10-20 01:08:50,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006022442] [2020-10-20 01:08:50,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:08:50,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 01:08:50,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:08:50,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 01:08:50,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:08:50,550 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:08:50,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:08:50,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-20 01:08:50,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024972471] [2020-10-20 01:08:50,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 01:08:50,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:08:50,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 01:08:50,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-20 01:08:50,553 INFO L87 Difference]: Start difference. First operand 68 states and 87 transitions. Second operand 8 states. [2020-10-20 01:08:50,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:08:50,843 INFO L93 Difference]: Finished difference Result 119 states and 166 transitions. [2020-10-20 01:08:50,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-20 01:08:50,845 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-10-20 01:08:50,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:08:50,846 INFO L225 Difference]: With dead ends: 119 [2020-10-20 01:08:50,846 INFO L226 Difference]: Without dead ends: 87 [2020-10-20 01:08:50,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-20 01:08:50,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-20 01:08:50,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 78. [2020-10-20 01:08:50,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-20 01:08:50,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 98 transitions. [2020-10-20 01:08:50,856 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 98 transitions. Word has length 41 [2020-10-20 01:08:50,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:08:50,857 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 98 transitions. [2020-10-20 01:08:50,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 01:08:50,857 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 98 transitions. [2020-10-20 01:08:50,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-20 01:08:50,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:08:50,858 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:08:51,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:08:51,072 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:08:51,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:08:51,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1208146702, now seen corresponding path program 1 times [2020-10-20 01:08:51,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:08:51,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622047188] [2020-10-20 01:08:51,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:08:51,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:08:51,493 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:08:51,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622047188] [2020-10-20 01:08:51,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922468939] [2020-10-20 01:08:51,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:08:51,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:08:51,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 41 conjunts are in the unsatisfiable core [2020-10-20 01:08:51,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:08:51,929 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 01:08:51,931 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 01:08:51,968 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:08:51,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:08:51,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2020-10-20 01:08:51,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725597780] [2020-10-20 01:08:51,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-20 01:08:51,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:08:51,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-20 01:08:51,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-10-20 01:08:51,971 INFO L87 Difference]: Start difference. First operand 78 states and 98 transitions. Second operand 22 states. [2020-10-20 01:08:52,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:08:52,588 INFO L93 Difference]: Finished difference Result 87 states and 109 transitions. [2020-10-20 01:08:52,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-20 01:08:52,589 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 45 [2020-10-20 01:08:52,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:08:52,590 INFO L225 Difference]: With dead ends: 87 [2020-10-20 01:08:52,591 INFO L226 Difference]: Without dead ends: 85 [2020-10-20 01:08:52,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2020-10-20 01:08:52,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-20 01:08:52,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2020-10-20 01:08:52,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-20 01:08:52,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 97 transitions. [2020-10-20 01:08:52,599 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 97 transitions. Word has length 45 [2020-10-20 01:08:52,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:08:52,599 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 97 transitions. [2020-10-20 01:08:52,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-20 01:08:52,600 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 97 transitions. [2020-10-20 01:08:52,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-20 01:08:52,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:08:52,601 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:08:52,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-10-20 01:08:52,810 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:08:52,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:08:52,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1648727767, now seen corresponding path program 1 times [2020-10-20 01:08:52,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:08:52,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660749236] [2020-10-20 01:08:52,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:08:52,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:08:53,157 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 10 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:08:53,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660749236] [2020-10-20 01:08:53,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133764160] [2020-10-20 01:08:53,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:08:53,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:08:53,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 45 conjunts are in the unsatisfiable core [2020-10-20 01:08:53,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:08:53,825 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:08:53,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:08:53,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15] total 23 [2020-10-20 01:08:53,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006421602] [2020-10-20 01:08:53,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-20 01:08:53,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:08:53,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-20 01:08:53,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=460, Unknown=0, NotChecked=0, Total=506 [2020-10-20 01:08:53,827 INFO L87 Difference]: Start difference. First operand 78 states and 97 transitions. Second operand 23 states. [2020-10-20 01:08:55,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:08:55,814 INFO L93 Difference]: Finished difference Result 114 states and 154 transitions. [2020-10-20 01:08:55,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-20 01:08:55,814 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 50 [2020-10-20 01:08:55,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:08:55,815 INFO L225 Difference]: With dead ends: 114 [2020-10-20 01:08:55,815 INFO L226 Difference]: Without dead ends: 82 [2020-10-20 01:08:55,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=124, Invalid=1136, Unknown=0, NotChecked=0, Total=1260 [2020-10-20 01:08:55,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-20 01:08:55,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-20 01:08:55,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-20 01:08:55,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 100 transitions. [2020-10-20 01:08:55,836 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 100 transitions. Word has length 50 [2020-10-20 01:08:55,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:08:55,836 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 100 transitions. [2020-10-20 01:08:55,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-20 01:08:55,837 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 100 transitions. [2020-10-20 01:08:55,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-20 01:08:55,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:08:55,839 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:08:56,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:08:56,049 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:08:56,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:08:56,049 INFO L82 PathProgramCache]: Analyzing trace with hash -379265710, now seen corresponding path program 1 times [2020-10-20 01:08:56,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:08:56,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770382544] [2020-10-20 01:08:56,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:08:56,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:08:56,499 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:08:56,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770382544] [2020-10-20 01:08:56,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107173789] [2020-10-20 01:08:56,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:08:56,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:08:56,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 45 conjunts are in the unsatisfiable core [2020-10-20 01:08:56,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:08:56,959 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 01:08:56,961 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 01:08:57,013 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:08:57,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:08:57,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2020-10-20 01:08:57,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317568204] [2020-10-20 01:08:57,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-20 01:08:57,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:08:57,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-20 01:08:57,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-10-20 01:08:57,015 INFO L87 Difference]: Start difference. First operand 81 states and 100 transitions. Second operand 26 states. [2020-10-20 01:08:57,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:08:57,854 INFO L93 Difference]: Finished difference Result 95 states and 120 transitions. [2020-10-20 01:08:57,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-20 01:08:57,855 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 52 [2020-10-20 01:08:57,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:08:57,856 INFO L225 Difference]: With dead ends: 95 [2020-10-20 01:08:57,856 INFO L226 Difference]: Without dead ends: 93 [2020-10-20 01:08:57,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=190, Invalid=1070, Unknown=0, NotChecked=0, Total=1260 [2020-10-20 01:08:57,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-20 01:08:57,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2020-10-20 01:08:57,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-20 01:08:57,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 102 transitions. [2020-10-20 01:08:57,872 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 102 transitions. Word has length 52 [2020-10-20 01:08:57,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:08:57,873 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 102 transitions. [2020-10-20 01:08:57,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-20 01:08:57,873 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 102 transitions. [2020-10-20 01:08:57,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-20 01:08:57,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:08:57,878 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:08:58,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:08:58,090 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:08:58,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:08:58,091 INFO L82 PathProgramCache]: Analyzing trace with hash -807573883, now seen corresponding path program 2 times [2020-10-20 01:08:58,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:08:58,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441416397] [2020-10-20 01:08:58,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:08:58,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:08:58,293 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 12 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:08:58,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441416397] [2020-10-20 01:08:58,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303215796] [2020-10-20 01:08:58,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:08:58,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 01:08:58,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:08:58,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-20 01:08:58,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:08:58,441 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 12 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:08:58,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:08:58,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-20 01:08:58,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420882292] [2020-10-20 01:08:58,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-20 01:08:58,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:08:58,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-20 01:08:58,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-20 01:08:58,444 INFO L87 Difference]: Start difference. First operand 83 states and 102 transitions. Second operand 10 states. [2020-10-20 01:08:58,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:08:58,784 INFO L93 Difference]: Finished difference Result 128 states and 171 transitions. [2020-10-20 01:08:58,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-20 01:08:58,784 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2020-10-20 01:08:58,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:08:58,785 INFO L225 Difference]: With dead ends: 128 [2020-10-20 01:08:58,785 INFO L226 Difference]: Without dead ends: 95 [2020-10-20 01:08:58,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-20 01:08:58,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-20 01:08:58,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2020-10-20 01:08:58,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-20 01:08:58,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 112 transitions. [2020-10-20 01:08:58,791 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 112 transitions. Word has length 56 [2020-10-20 01:08:58,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:08:58,792 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 112 transitions. [2020-10-20 01:08:58,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-20 01:08:58,792 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 112 transitions. [2020-10-20 01:08:58,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-20 01:08:58,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:08:58,793 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:08:59,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-20 01:08:59,004 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:08:59,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:08:59,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1342094880, now seen corresponding path program 1 times [2020-10-20 01:08:59,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:08:59,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768039187] [2020-10-20 01:08:59,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:08:59,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:08:59,557 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:08:59,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768039187] [2020-10-20 01:08:59,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552141694] [2020-10-20 01:08:59,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:08:59,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:08:59,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 49 conjunts are in the unsatisfiable core [2020-10-20 01:08:59,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:00,137 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 01:09:00,138 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 01:09:00,200 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:09:00,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:09:00,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2020-10-20 01:09:00,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149300221] [2020-10-20 01:09:00,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-20 01:09:00,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:00,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-20 01:09:00,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2020-10-20 01:09:00,202 INFO L87 Difference]: Start difference. First operand 92 states and 112 transitions. Second operand 30 states. [2020-10-20 01:09:01,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:01,628 INFO L93 Difference]: Finished difference Result 95 states and 114 transitions. [2020-10-20 01:09:01,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-20 01:09:01,629 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2020-10-20 01:09:01,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:01,630 INFO L225 Difference]: With dead ends: 95 [2020-10-20 01:09:01,630 INFO L226 Difference]: Without dead ends: 93 [2020-10-20 01:09:01,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=244, Invalid=1478, Unknown=0, NotChecked=0, Total=1722 [2020-10-20 01:09:01,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-20 01:09:01,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-10-20 01:09:01,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-20 01:09:01,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 111 transitions. [2020-10-20 01:09:01,636 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 111 transitions. Word has length 58 [2020-10-20 01:09:01,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:01,637 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 111 transitions. [2020-10-20 01:09:01,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-20 01:09:01,637 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 111 transitions. [2020-10-20 01:09:01,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-20 01:09:01,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:01,638 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:09:01,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-20 01:09:01,843 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:01,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:01,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1711878395, now seen corresponding path program 1 times [2020-10-20 01:09:01,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:01,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929691400] [2020-10-20 01:09:01,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:01,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:02,406 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:09:02,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929691400] [2020-10-20 01:09:02,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002497656] [2020-10-20 01:09:02,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:02,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:02,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 53 conjunts are in the unsatisfiable core [2020-10-20 01:09:02,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:03,091 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 01:09:03,093 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 01:09:03,156 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:09:03,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:09:03,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 34 [2020-10-20 01:09:03,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043812166] [2020-10-20 01:09:03,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-20 01:09:03,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:03,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-20 01:09:03,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2020-10-20 01:09:03,159 INFO L87 Difference]: Start difference. First operand 92 states and 111 transitions. Second operand 34 states. [2020-10-20 01:09:04,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:04,766 INFO L93 Difference]: Finished difference Result 106 states and 131 transitions. [2020-10-20 01:09:04,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-20 01:09:04,766 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 63 [2020-10-20 01:09:04,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:04,768 INFO L225 Difference]: With dead ends: 106 [2020-10-20 01:09:04,768 INFO L226 Difference]: Without dead ends: 104 [2020-10-20 01:09:04,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=304, Invalid=1952, Unknown=0, NotChecked=0, Total=2256 [2020-10-20 01:09:04,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-20 01:09:04,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2020-10-20 01:09:04,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-20 01:09:04,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 113 transitions. [2020-10-20 01:09:04,774 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 113 transitions. Word has length 63 [2020-10-20 01:09:04,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:04,774 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 113 transitions. [2020-10-20 01:09:04,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-20 01:09:04,775 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 113 transitions. [2020-10-20 01:09:04,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-20 01:09:04,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:04,775 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 7, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:09:04,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-20 01:09:04,987 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:04,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:04,987 INFO L82 PathProgramCache]: Analyzing trace with hash 501827256, now seen corresponding path program 2 times [2020-10-20 01:09:04,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:04,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491795010] [2020-10-20 01:09:04,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:05,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:05,640 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 199 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 01:09:05,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491795010] [2020-10-20 01:09:05,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449605581] [2020-10-20 01:09:05,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:05,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 01:09:05,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:09:05,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 57 conjunts are in the unsatisfiable core [2020-10-20 01:09:05,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:06,450 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 01:09:06,452 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 01:09:06,552 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:09:06,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:09:06,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 37 [2020-10-20 01:09:06,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793202383] [2020-10-20 01:09:06,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-20 01:09:06,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:06,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-20 01:09:06,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1131, Unknown=0, NotChecked=0, Total=1332 [2020-10-20 01:09:06,554 INFO L87 Difference]: Start difference. First operand 94 states and 113 transitions. Second operand 37 states. [2020-10-20 01:09:07,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:07,986 INFO L93 Difference]: Finished difference Result 127 states and 167 transitions. [2020-10-20 01:09:07,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-20 01:09:07,987 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 67 [2020-10-20 01:09:07,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:07,987 INFO L225 Difference]: With dead ends: 127 [2020-10-20 01:09:07,987 INFO L226 Difference]: Without dead ends: 0 [2020-10-20 01:09:07,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=372, Invalid=2598, Unknown=0, NotChecked=0, Total=2970 [2020-10-20 01:09:07,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-20 01:09:07,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-20 01:09:07,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-20 01:09:07,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 01:09:07,990 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 67 [2020-10-20 01:09:07,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:07,991 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 01:09:07,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-20 01:09:07,991 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-20 01:09:07,991 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-20 01:09:08,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:08,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-20 01:09:08,607 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 40 [2020-10-20 01:09:08,610 INFO L274 CegarLoopResult]: For program point L35-2(lines 23 38) no Hoare annotation was computed. [2020-10-20 01:09:08,610 INFO L274 CegarLoopResult]: For program point L31(lines 31 38) no Hoare annotation was computed. [2020-10-20 01:09:08,610 INFO L274 CegarLoopResult]: For program point L27(lines 27 38) no Hoare annotation was computed. [2020-10-20 01:09:08,610 INFO L274 CegarLoopResult]: For program point L23(lines 23 38) no Hoare annotation was computed. [2020-10-20 01:09:08,610 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-10-20 01:09:08,610 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-20 01:09:08,610 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-20 01:09:08,610 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-20 01:09:08,611 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-20 01:09:08,611 INFO L274 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-10-20 01:09:08,611 INFO L274 CegarLoopResult]: For program point L33(lines 33 38) no Hoare annotation was computed. [2020-10-20 01:09:08,611 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-20 01:09:08,611 INFO L274 CegarLoopResult]: For program point L29(lines 29 38) no Hoare annotation was computed. [2020-10-20 01:09:08,611 INFO L274 CegarLoopResult]: For program point L25(lines 25 38) no Hoare annotation was computed. [2020-10-20 01:09:08,611 INFO L274 CegarLoopResult]: For program point L21-2(lines 21 41) no Hoare annotation was computed. [2020-10-20 01:09:08,612 INFO L270 CegarLoopResult]: At program point L42(lines 16 43) the Hoare annotation is: (or (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)) (and (= ULTIMATE.start_main_~v4~0 0) (= ULTIMATE.start_main_~i~0 0) (= ULTIMATE.start_main_~v1~0 0) (= ULTIMATE.start_main_~k~0 0) (= ULTIMATE.start_main_~v5~0 0) (= ULTIMATE.start_main_~j~0 0) (= ULTIMATE.start_main_~l~0 0) (= ULTIMATE.start_main_~v2~0 0) (= ULTIMATE.start_main_~v3~0 0))) [2020-10-20 01:09:08,612 INFO L274 CegarLoopResult]: For program point L9(lines 9 11) no Hoare annotation was computed. [2020-10-20 01:09:08,612 INFO L270 CegarLoopResult]: At program point L9-2(lines 8 41) the Hoare annotation is: (let ((.cse0 (< 0 (+ (div ~SIZE~0 4294967296) 1))) (.cse1 (<= ~SIZE~0 20000001))) (or (and (= ULTIMATE.start_main_~v4~0 0) .cse0 (= ULTIMATE.start_main_~i~0 0) (= ULTIMATE.start_main_~v1~0 0) (= ULTIMATE.start_main_~k~0 0) (= ULTIMATE.start_main_~v5~0 0) (<= ULTIMATE.start_main_~n~0 (+ (* 4294967296 (div ULTIMATE.start_main_~n~0 4294967296)) 20000001)) (= ULTIMATE.start_main_~j~0 0) (= ULTIMATE.start_main_~l~0 0) (= ULTIMATE.start_main_~v2~0 0) (= ULTIMATE.start_main_~v3~0 0) .cse1) (let ((.cse2 (+ ULTIMATE.start_main_~v1~0 ULTIMATE.start_main_~v2~0 ULTIMATE.start_main_~i~0 ULTIMATE.start_main_~v3~0 ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~v4~0 ULTIMATE.start_main_~j~0 ULTIMATE.start_main_~v5~0))) (and .cse0 (<= ULTIMATE.start_main_~l~0 .cse2) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= .cse2 ULTIMATE.start_main_~l~0) .cse1)))) [2020-10-20 01:09:08,612 INFO L274 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2020-10-20 01:09:08,612 INFO L274 CegarLoopResult]: For program point L35(lines 35 38) no Hoare annotation was computed. [2020-10-20 01:09:08,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 01:09:08 BoogieIcfgContainer [2020-10-20 01:09:08,635 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 01:09:08,636 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 01:09:08,636 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 01:09:08,636 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 01:09:08,637 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:08:24" (3/4) ... [2020-10-20 01:09:08,641 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-20 01:09:08,655 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-10-20 01:09:08,655 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-20 01:09:08,655 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 01:09:08,656 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 01:09:08,718 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 01:09:08,718 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 01:09:08,720 INFO L168 Benchmark]: Toolchain (without parser) took 44882.32 ms. Allocated memory was 41.4 MB in the beginning and 109.1 MB in the end (delta: 67.6 MB). Free memory was 21.5 MB in the beginning and 83.4 MB in the end (delta: -61.9 MB). Peak memory consumption was 5.7 MB. Max. memory is 14.3 GB. [2020-10-20 01:09:08,720 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 31.5 MB. Free memory was 10.1 MB in the beginning and 10.1 MB in the end (delta: 47.5 kB). Peak memory consumption was 47.5 kB. Max. memory is 14.3 GB. [2020-10-20 01:09:08,721 INFO L168 Benchmark]: CACSL2BoogieTranslator took 305.04 ms. Allocated memory was 41.4 MB in the beginning and 41.9 MB in the end (delta: 524.3 kB). Free memory was 20.6 MB in the beginning and 22.1 MB in the end (delta: -1.5 MB). Peak memory consumption was 11.4 MB. Max. memory is 14.3 GB. [2020-10-20 01:09:08,721 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.49 ms. Allocated memory is still 41.9 MB. Free memory was 22.1 MB in the beginning and 20.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. [2020-10-20 01:09:08,722 INFO L168 Benchmark]: Boogie Preprocessor took 27.31 ms. Allocated memory is still 41.9 MB. Free memory was 20.2 MB in the beginning and 18.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 14.3 GB. [2020-10-20 01:09:08,722 INFO L168 Benchmark]: RCFGBuilder took 358.06 ms. Allocated memory was 41.9 MB in the beginning and 43.5 MB in the end (delta: 1.6 MB). Free memory was 18.8 MB in the beginning and 20.7 MB in the end (delta: -2.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 14.3 GB. [2020-10-20 01:09:08,723 INFO L168 Benchmark]: TraceAbstraction took 44052.85 ms. Allocated memory was 43.5 MB in the beginning and 109.1 MB in the end (delta: 65.5 MB). Free memory was 20.3 MB in the beginning and 86.7 MB in the end (delta: -66.5 MB). Peak memory consumption was 78.3 MB. Max. memory is 14.3 GB. [2020-10-20 01:09:08,723 INFO L168 Benchmark]: Witness Printer took 82.04 ms. Allocated memory is still 109.1 MB. Free memory was 86.7 MB in the beginning and 83.4 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 14.3 GB. [2020-10-20 01:09:08,726 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 31.5 MB. Free memory was 10.1 MB in the beginning and 10.1 MB in the end (delta: 47.5 kB). Peak memory consumption was 47.5 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 305.04 ms. Allocated memory was 41.4 MB in the beginning and 41.9 MB in the end (delta: 524.3 kB). Free memory was 20.6 MB in the beginning and 22.1 MB in the end (delta: -1.5 MB). Peak memory consumption was 11.4 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 44.49 ms. Allocated memory is still 41.9 MB. Free memory was 22.1 MB in the beginning and 20.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 27.31 ms. Allocated memory is still 41.9 MB. Free memory was 20.2 MB in the beginning and 18.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 14.3 GB. * RCFGBuilder took 358.06 ms. Allocated memory was 41.9 MB in the beginning and 43.5 MB in the end (delta: 1.6 MB). Free memory was 18.8 MB in the beginning and 20.7 MB in the end (delta: -2.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 14.3 GB. * TraceAbstraction took 44052.85 ms. Allocated memory was 43.5 MB in the beginning and 109.1 MB in the end (delta: 65.5 MB). Free memory was 20.3 MB in the beginning and 86.7 MB in the end (delta: -66.5 MB). Peak memory consumption was 78.3 MB. Max. memory is 14.3 GB. * Witness Printer took 82.04 ms. Allocated memory is still 109.1 MB. Free memory was 86.7 MB in the beginning and 83.4 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: 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: 16]: Loop Invariant Derived loop invariant: !(0 == cond) || ((((((((v4 == 0 && i == 0) && v1 == 0) && k == 0) && v5 == 0) && j == 0) && l == 0) && v2 == 0) && v3 == 0) - InvariantResult [Line: 8]: Loop Invariant Derived loop invariant: (((((((((((v4 == 0 && 0 < SIZE / 4294967296 + 1) && i == 0) && v1 == 0) && k == 0) && v5 == 0) && n <= 4294967296 * (n / 4294967296) + 20000001) && j == 0) && l == 0) && v2 == 0) && v3 == 0) && SIZE <= 20000001) || ((((0 < SIZE / 4294967296 + 1 && l <= v1 + v2 + i + v3 + k + v4 + j + v5) && 1 <= cond) && v1 + v2 + i + v3 + k + v4 + j + v5 <= l) && SIZE <= 20000001) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 43.5s, OverallIterations: 15, TraceHistogramMax: 9, AutomataDifference: 29.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 141 SDtfs, 1078 SDslu, 802 SDs, 0 SdLazy, 7282 SolverSat, 265 SolverUnsat, 8 SolverUnknown, 0 SolverNotchecked, 22.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 828 GetRequests, 479 SyntacticMatches, 11 SemanticMatches, 338 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3075 ImplicationChecksByTransitivity, 11.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=94occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 88 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 16 NumberOfFragments, 117 HoareAnnotationTreeSize, 2 FomulaSimplifications, 559 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 732 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 9.0s InterpolantComputationTime, 1176 NumberOfCodeBlocks, 1176 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 1147 ConstructedInterpolants, 0 QuantifiedInterpolants, 1239451 SizeOfPredicates, 127 NumberOfNonLiveVariables, 1895 ConjunctsInSsa, 488 ConjunctsInUnsatCore, 29 InterpolantComputations, 1 PerfectInterpolantSequences, 69/2110 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...